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Forest and biomass crops for bioenergy and bioproducts can promote a sustainable bioeconomy while effectively reducing greenhouse gas (GHG) emissions to mitigate global warming. One of the most concerning issues is selecting and using appropriate modeling and analytical technologies to optimize the benefits of multi-feedstock biomass supply chains, including logistics. Machine learning (ML) has been used to solve increasingly complex supply chain problems, providing powerful tools for sustainable forest management and biomass resource development. Existing research is extensive and spans many different ML techniques, but synthesis is needed to help guide the adoption of these rapidly evolving tools. This review summarizes ML applications in forest and biomass supply chain management in terms of data, algorithms, and process examples, with an emphasis on direct application to supply chain management. ML is a viable technique to support strategic, operational, and tactical planning and decision-making in this field and can enhance the environmental and economic performance of diverse forest and biomass supply chains. [ABSTRACT FROM AUTHOR]

High costs primarily pose challenges to forest management in planning and executing the repair of forest roads. With budget limitations and inadequate oversight, it has become critically essential to monitor the state of these roads. Monitoring the condition of forest roads has become imperative, driven by budget constraints and a lack of effective supervision. While smartphones have proven effective in detecting road defects on public roads, their application on forest roads is hindered by the absence of suitable indices and software infrastructure. Addressing this gap, this research focuses on the development of the Forest Road Pavement Condition Index (FRPCI) to facilitate smartphone-based monitoring. We collected and compared data from 4 kilometers of forest roads, employing two traditional harvesting methods alongside smartphone sensor data. Utilizing deep learning methods, including Convolutional Neural Network (CNN), Long-Short Term Memory (LSTM), and CNN-LSTM, we processed the collected data. Signal processing using GPS data, coupled with wavelet transformation, demonstrated promising results with an accuracy and recall exceeding 80%. The proposed system functions as a distributed information system, transitioning data from organizational mode to field mode. It measures damage, assesses forest road conditions, and leverages image processing and GPS technologies. This monitoring system technology offers capabilities for preparing, storing, updating, maintaining, and analyzing diverse information. Importantly, adopting this method can significantly reduce operating costs, making forest road monitoring for maintenance purposes more feasible. [ABSTRACT FROM AUTHOR]

Forest biomass estimates are required for many applications, including accounting for the role of forests in the global carbon cycle, supporting sustainable forest management and making informed decisions. For all these applications and others, accurate and reliable forest biomass estimates are required. This study evaluated the potential of Sentinel-2 data for predicting and mapping aboveground biomass (AGB) of a dry Afromontane Forest in Tigray, Northern Ethiopia. Multiple linear regression was employed to model the relationship between AGB and Sentinel-2-derived spectral variables. The evaluation criteria for best-fit model selection were based on the coefficient of determination (R2), root mean square error (RMSE, %), and bias (Bias, %). All the spectral variables evaluated here were significantly correlated with AGB (p < 0.01). The model that includes a fraction of photosynthetically active radiation (FAPAR), leaf area index (LAI), Band 2 and Band 3 as predictor variables provided the best predictive performance for AGB in the study area (R2 = 0.38, RMSE = 13.62 Mg ha−1 and Bias = -3.10 Mg ha−1). The predicted AGB of the study area ranges from 0.1 to 141.8 Mg ha−1, with a mean value of 12.4 Mg ha−1. The results from this study suggested that Sentinel-2 data can be potentially applied for estimating and mapping AGB in dry Afromontane forests. [ABSTRACT FROM AUTHOR]

Small-scale owners constitute an essential share of private forest ownership, and their decision-making significantly affects nature conservation and landscape formation. From economic and environmental viewpoints, forest owners’ associations are one of the most effective ways to manage small-scale forest property. Using the example of the Czech Republic, this paper focuses on small-scale forest associations’ potential in sustainable forest management. For the qualitative study, the authors interviewed small-scale owners to elicit how they perceived joint management through associations and what they considered their most significant benefits and values. The findings indicate that although small-scale owners realize the importance of associations for joint forest management, they are reluctant to join or form them. Their restraints mainly result from insufficient awareness. Improving the communication strategy amongst forest policy players with small-scale owners as stakeholders on the one side and state authorities on the other is vital. The positive approach could also be reached by inevitable changes in legislation and subsidy schemes because, as they are set now, they provide little opportunity for small-scale owners to associate. The findings, however, indicate a shift from small-scale owners perceiving the forest purely economically to understanding its socio-ecological values. [ABSTRACT FROM AUTHOR]

Forests worldwide contain unique cultural traces of past human land use. Increased pressure on forest ecosystems and intensive modern forest management methods threaten these ancient monuments and cultural remains. In northern Europe, older forests often contain very old traces, such as millennia-old hunting pits and indigenous Sami hearths. Investigations have repeatedly found that forest owners often fail to protect these cultural remains and that many are damaged by forestry operations. Current maps of hunting pits are incomplete, and the locations of known pits have poor spatial accuracy. This study investigated whether hunting pits can be automatically mapped using national airborne laser data and deep learning. The best model correctly mapped 70% of all the hunting pits in the test data with an F1 score of 0.76. This model can be implemented across northern Scandinavia and could have an immediate effect on the protection of cultural remains. [ABSTRACT FROM AUTHOR]

The aim of this study is to explore the relationships and perspectives of stakeholders involved in the stewardship of 'urban green infrastructure' in England. We used stewardship of the urban forest network (trees and associated green space) as a focal point by referring to four meanings of 'Stewardship', i.e. Motivation, Ethic, Outcome and Action proposed by Peçanha Enqvist et al. (2018). We studied the perspectives of stakeholders through a multi-regional approach, in five English cities (Newcastle/Gateshead, Leeds, Sheffield, Coventry and Bristol), assessing their views expressed via questionnaire and analysing responses through NVivo. We found support for stewardship as a key aspect of urban green infrastructure planning, one that encourages 'bottom up' participation. In the specific area of urban forestry in England we propose that to ensure a co-stewardship role, planning professionals and citizens should work together at all levels to identify key roles and stewardship niches that are complementary. [ABSTRACT FROM AUTHOR]

Precise classification of Light Detection and Ranging (LiDAR) point cloud is a fundamental process in various applications, such as land cover mapping, forestry management, and autonomous driving. Due to the lack of spectral information, the existing research on single wavelength LiDAR classification is limited. Spectral information from images could address this limitation, but data fusion suffers from varying illumination conditions and the registration problem. A novel multispectral LiDAR successfully obtains spatial and spectral information as a brand-new data type, namely, multispectral point cloud, thereby improving classification performance. However, spatial and spectral information of multispectral LiDAR has been processed separately in previous studies, thereby possibly limiting the classification performance of multispectral LiDAR. To explore the potential of this new data type, the current spatial–spectral classification framework for multispectral LiDAR that includes four steps: (1) neighborhood selection, (2) feature extraction and selection, (3) classification, and (4) label smoothing. Three novel highlights were proposed in this spatial – spectral classification framework. (1) We improved the popular eigen entropy-based neighborhood selection by spectral angle match to extract a more precise neighborhood. (2) We evaluated the importance of geometric and spectral features to compare their contributions and selected the most important features to reduce feature redundancy. (3) We conducted spatial label smoothing by a conditional random field, accounting for the spatial and spectral information of the neighborhood points. The proposed method demonstrated by a multispectral LiDAR with three channels: 466 nm (blue), 527 nm (green), and 628 nm (red). Experimental results demonstrate the effectiveness of the proposed spatial – spectral classification framework. Moreover, this research takes advantages of the complementation of spatial and spectral information, which could benefit more precise neighborhood selection, more effective features, and satisfactory refinement of classification result. Finally, this study could serve as an inspiration for future efficient spatial–spectral process for multispectral point cloud. [ABSTRACT FROM AUTHOR]

AbstractThe study of the holm oak forests of the lower and upper mesomediterranean of the south of the Iberian Peninsula, and new syntaxons of holm oak forests not assigned until now are contributed. The plant dynamics is provided and completed, and the importance of the learning of plant description and dynamics by university students, future environmental managers, is specified. Taking into account the strong anthropic action with the consequent destruction of holm oak forests, it is necessary to enhance the knowledge of plant dynamics to decipher the potential vegetation, and to be able to apply the vegetation series as a basis for agronomic and forestry management. In this work, we propose a new vegetation series. We propose the association Aristolochio baeticae-Quercetum rotundifoliae nova for the biogeographic sector Granadino-Almijarense (Montes de Málaga) and as a first dynamic stage of the microforest of Olea europea var. sylvestris obtained by deforestation. The study of the Iberian olive groves allows us to propose two new associations Aristolochio baeticae-Oleetum sylvestris and Ephedro fragilis-Oleetum sylvestris. [ABSTRACT FROM AUTHOR]

Nostalgia has reemerged in recent years in response to political, environmental, and other instabilities. This study uses transcripts from fifty-five in-depth interviews with three groups of forest workers to examine the experience of nostalgia in forest management. This takes multiple forms, including nostalgia for place, for work, and for a “pristine” landscape of the past. While the former two are prominent among loggers and, to a lesser extent, governmental workers, the latter type emerges primarily among members of environmental organizations. All three types have implications for the ways people construct their own identities, feelings toward others, and beliefs about how people ought to interact with the forest. They also reflect disruptions to environmental knowledge. Ultimately, nostalgia should be understood as a manifestation of the things that people long for in their current circumstances, most notably, belonging, purpose, and harmony with the landscape. [ABSTRACT FROM AUTHOR]

The study focuses on actor participation and power dynamics in the REDD+ project within the Bale eco-region, a vital facet of global climate policy for sustainable forest resource management. The Forest Carbon Partnership Facility (FCPF) of the World Bank supports developing countries in preparing for international REDD+ policy implementation, emphasizing the necessity of effective actor participation. The study uses text documents, Socio metric survey, and interviews with project actors and participants. This study employs both qualitative framework and social network analysis (SNA). While SNA looks at power dynamics and interactions between actors, the qualitative framework allows for a comprehensive evaluation of actor participation. The social network data was analyzed using an open source software called NodeXL. Results show that Bale eco-region REDD+ involves actors from different groups. Actors contribute to national strategies, funding, capacity building, and knowledge sharing. However, local communities have limited involvement in decision-making, lack knowledge sharing and capacity building. This hinders the implementation process and contributes to unequal power dynamics and lack the comprehensive input needed for effective and tailored strategies in the region. Calculated centrality values highlight a strong alliance among Ethiopia's national government entity overseeing REDD+ Environment, Forest and Climate Change Commission (EFCCC), and the regional entities Oromiya Forest and Wildlife Enterprise (OFWI), as well as Farm Africa, indicating significant institutional power across national and local levels. EFCCC holds influence in decision-making and strategy development, while OFWI wields substantial regional institutional power in information control and collaboration. Thus, climate policies must prioritize involvement of local communities in decision-making, capacity development, and resource accessibility. This helps to tackle power imbalances through collaborative governance structures. It also enables stakeholders to actively manage forests through imparting skills, knowledge and share benefits equally. Key Policy Insights: Implementing an inclusive, collaborative approach to governance of any REDD+ initiative creates the conditions for success through legitimate decision making and equitable. Decentralizing decision-making helps to balance power dynamics between powerful stakeholders and weaker stakeholders. Involving the private sector is recommended to enhance investment coordination for REDD+ development and mitigate potential negative impacts. Successfully implementing climate policy depends on leveraging current structures, adjusting engagement to local contexts, and fostering ongoing dialogue. [ABSTRACT FROM AUTHOR]

Urban forestry programs across North America rely on volunteers to lead urban forest stewardship activities and encourage participation in tree planting and general maintenance. We examined the leadership structure of a tree planting initiative (TPI) in the greater Philadelphia region to understand the role and labor contributions of volunteer leaders, and the current challenges of achieving equitable urban tree canopy within community-led TPIs. Using an online survey, we found that leaders contribute unpaid labor, time, and skills within the following categories: group organization and communication, tree-planting and event coordination, tree care and maintenance, and broader environmental education and advocacy. Volunteer leaders also face challenges related to leadership and administrative tasks. This study deepens understandings of the labor needs within volunteer TPIs and potential ways to support the equitable growth of these initiatives moving forward. Future research is needed to understand recognitional equity gaps in volunteer leadership more broadly. [ABSTRACT FROM AUTHOR]

The punctuality of vessel arrival at port is a crucial issue in contemporary port operations. Uncertainties in vessel arrival can lead to port handling inefficiency and result in economic losses. Although vessels typically report their estimated time of arrival (ETA) en-route to the destination port, their actual time of arrival (ATA) often differs from the reported ETA due to various factors. To address this issue and enhance terminal operational efficiency, we first quantitatively evaluate vessel arrival uncertainty in different time slides prior to arrival at the port using 2021 vessel arrival data for Hong Kong port (HKP). Our results confirm that the overall vessel arrival uncertainty decreases as vessels approach the HKP. Then, we implement a random forest (RF) approach to predict vessel arrival time. Our model reduces the error in ship ATA data prediction by approximately 40% (from 25.5 h to 15.5 h) using the root mean squared error metric and 20% (from 13.8 h to 11.0 h) using the mean absolute error metric compared with the reported ETA data. The proposed vessel arrival time evaluation and prediction models are applicable to port management and operation, laying the foundation for future research on port daily operations. [ABSTRACT FROM AUTHOR]

AbstractLichens are well-known bioindicators and exhibit high sensitivity to environmental changes due to their unique biological characteristics. Despite their ecological significance, lichens are often overlooked in conservation policies both at the European Union (EU) and global levels. The situation is better at the level of national Red Lists that can provide candidate species for regional or global Red Lists, thereby helping to prioritize conservation efforts. To fill a gap at the national level, this article presents the comprehensive data of the Red List of Latvian lichens. For the first time, IUCN threat categories and criteria were applied to assess 85 lichenized and one lichenicolous fungus during 2022–2023. Of these species, 3 were classified as Least Concern (LC), 2 as Data Deficient (DD), 11 as Near Threatened (NT), and 68 were ascribed the threatened categories: 14 to Vulnerable (VU), 27 to Endangered (EN), 27 to Critically Endangered (CR). The majority of Latvian lichens categorized as threatened or near threatened inhabit woodlands, particularly old-growth forests, which face the primary threat of intensive forest management. This article emphasizes the importance of continued evaluation efforts, while also addressing challenges associated with data scarcity and limited lichenological research capacity in Latvia. [ABSTRACT FROM AUTHOR]

Enhancing forest drought resilience is important for preserving ecosystem services in the face of climate change, but operational management methods for boreal forests aiming to preserve ecosystem services under drought are still largely missing. This study explores the use of satellite remote sensing to monitor vegetation stress phases related to drought progression and to quantify both short- and long-term impacts on forest growth. Data from the Sentinel-2 satellite mission were used to calculate the response of vegetation indices across six forest types, using the time period from 2015 to 2017 as a reference dataset. The percentual difference between the drought year of 2018 and the reference period was used to represent disturbance intensity and the system's capability to resist it. Additionally, the recovery time was taken into consideration. Breakpoint detection with daily temporal resolution was used to quantify the response time of each forest type in relation to the onset date of meteorological drought. Results indicate that Sentinel-2 data can be used to monitor vegetation stress associated with drought progression and estimate the characteristics of forest resilience. High temporal resolution observations should be prioritized over annual maximum vegetation index values to determine the intensity of disturbance. Consistent severe impacts were observed in areas with limited soil moisture availability. The recovery time of forests took up to 4 years. Drought exposure during consecutive years could be especially damaging for species requiring a longer recovery time than a single growing season. Sentinel-2-based monitoring approach could benefit decision-support systems for forest management aiming to enhance drought resilience. [ABSTRACT FROM AUTHOR]

This article provides information about Obersee, a lake in Kißlegg, Germany. It describes the size and depth of the lake, as well as the surrounding landscape. The article also discusses the sediment core of the lake, which contains ancient sediments dating back to 6500 BC. The document includes a pollen record based on samples from the Obersee region, showing changes in vegetation and human impact over time. The authors acknowledge the assistance of individuals who helped with the research. No conflicts of interest were reported. [Extracted from the article]

Although academic debates since the 1990s have focused on the outcomes of community forest management interventions these debates have not been widespread within the African context. Literature on a hybrid business model to enable socio-economic security for communities has generally been inadequate. This study examined the socio-economic benefits derived from the Okongo and Uukolonkadhi community forests in Namibia to better understand the local communities' perceptions of forest management beneficiation. Semi-structured interviews were conducted with residents of these community forests and key government and civil society informants involved with forest management programmes. Although there is an enabling framework in place for benefit sharing, these are unequal, and most residents are unaware of the benefit distribution plans. The government also lacks sufficient economic and technical resources to support communities in developing inclusive hybrid business models. Scholarship must consider the divergent southern geographic contextual challenges to better understand forest beneficiation outcomes. [ABSTRACT FROM AUTHOR]

Movements of moose are caused by variations in resource availability such as food, shelter and the energetic cost of foraging. These variables are important in forest and population management. Therefore, the main objective of the present study was to estimate the influence of forest site types on the distribution of the non hunted moose population in February and March 2020 in the Augustów Forest, a 1102.0 km2 forest complex in north-eastern Poland. In the study area, 20 sampling plots were distributed over a total area of 91.4 km2, where six teams, each consisting of 30 people, observed moose to estimate population numbers. The average population density was 1.22 ± 0.19 moose per km2 and ranged from 0.21 to 3.40 animals/km2. The total population number estimated this way amounted to 1344 animals. Non-linear regression demonstrated a positive relationship between the percentage of hygric-wet forest site types in the sampling plot area and the moose population distribution (r = 0.735, n = 20, p = 0.0096). In winter, these habitats are a critical refuge for moose. For this reason, tree harvesting and hunting in hygric-wet forest site types should be limited during this period. [ABSTRACT FROM AUTHOR]

This study was conducted to explore measures taken by private forest owners in a region of southern Sweden to adapt forestry to climate change and the motivations behind these measures. Additionally, measures undertaken were compared with policy goals of the Swedish Forest Agency. Data were gathered through a questionnaire and interviews. The most common measure, mentioned by 72% (64) of respondents, is the choice of tree species, usually involving the replacement of Norway spruce (Picea abies (L.) H. Karst) with Scots pine (Pinus sylvestris L.) or deciduous tree species. Other significant measures are creating mixed forests and shortened rotation periods for Norway spruce. While forest owners have adopted several policy-aligned measures, they have not yet prioritized measures pertaining to forest roads, or specific social and environmental concerns such as avoiding clear-cutting in erosion-prone areas or creating dying trees. The most common motive for adapting forestry is to reduce the risk of damage. Communication activities of authorities and forestry advisors that start from forest owners' multifunctional views and multiple motives for taking action could promote the development of climate-adapted forests. Highlighting the additional environmental and social values that are served by climate adaptation measures may further motivate forest owners. [ABSTRACT FROM AUTHOR]

This article explores the precarity that surrounds the acquisition of techigi (yeddo hawthorn) trees, a material used in the production of traditional and contemporary textiles, on the island of Amami Ōshima, southern Japan. A waste product of industrial forestry, the article suggests that the difficulties craftspeople face in accessing techigi are symptoms of complex historical and contemporary processes linked to property regimes and resource management that have dispossessed local residents of ecological stewardship. [ABSTRACT FROM AUTHOR]

Airborne laser scanners produce 3D data that can be used for a range of applications, such as urban planning, facility monitoring, flood mapping, and forest management. Additional information on the surveyed area can be obtained from the backscattered waveforms recorded by modern light detection and ranging (lidar) sensors. However, the high-dimensional representation of full-waveform data has hindered progress in its use due to difficulties in processing and storage. This paper develops a quantized convolutional autoencoder network to compress lidar waveform data into a condensed feature representation, resulting in a compression rate of up to 20:1. This, together with height information, is fed into a U-net convolutional neural network that achieves an accuracy of 93.7% on six classes. [ABSTRACT FROM AUTHOR]

Inventorying forest ecosystems is an essential part of forest management planning. However, it is quite costly and time-consuming, particularly for larger areas. Recently, significant developments have been made in unmanned aerial vehicle (UAV) technology to improve the cost and time efficiency in forest inventory. Therefore, UAV images have become one of the inventory tools that produces data with high spatial resolution in determining forest resources. This study aims to investigate the contribution of UAV data to forest inventory in a case study area with a total of 30 sample plots located in pure and natural Crimean pine (Pinus nigra J.F. Arnold ssp. pallasiana (Lamb.) Holmboe) stands in the Black Sea backward region of Türkiye. Total tree height (h) and stem volume (v) were recorded at individual tree level (n = 367), and the number of trees (N), mean height (hmean), top height (htop), stand basal area (BA) and stand volume (V) were calculated at sample plot level (n = 30) from both the field and UAV-based data. Pearson's correlation coefficients (r) for h and v were 0.96 and 0.72, respectively, the highest correlation at the sample plot level was observed for the hmean - htop (r = 0.96), while the lowest correlation was found for BA (r = 0.54). The suitability of the observation and prediction values was assessed using a t-test at both individual tree and sample plot levels. According to the t-test results, the observation and prediction values for h, v, hmean, htop, BA and V metrics were found to be compatible (p > 0.05), but not for N (p < 0.05). Overall results indicated that UAV technology has a potential to be used in forest inventory and can contribute to the determination of individual tree and stand metrics. Thereby, it saves cost and time in forest inventory studies and helps monitoring the dynamic structure of the forest ecosystem with an effective approach in forest inventory. [ABSTRACT FROM AUTHOR]

Recent research shows that China is experiencing significant greening, with afforestation initiatives being the main cause. Quantitative calculation of vegetation change influencing factors and evaluation of the contribution of afforestation to vegetation greening in China are critical to coping with climate change and improving the implementation and efficacy of forestry projects. We investigated the temporal and spatial dynamics of the Normalized Difference Vegetation Index (NDVI) from 1982 to 2020, and quantified the contribution of afforestation initiatives, a typical human activity, to the dynamic changes of vegetation. The results showed that NDVI in China has primarily increased in the last 39 years. 57% of the pixels increased, 27% were stable and unchanged, and 16% decreased. Climate change was responsible for 72.34% of vegetation restoration, while human activities were responsible for 27.36% of vegetation restoration, according to residual analysis. In the future, only 14% of the regions showed continuous growth of the NDVI, while the remaining regions showed obvious antipersistence (59% will go from increasing to decreasing, and 22% will go from decreasing to increasing). The contribution of climate factors to vegetation change will decrease in the future, and human activities will become more complex. Except for Huaihe River and Taihu Lake (SPHRTL), other forestry projects showed an increasing trend of NDVI after the implementation of ecological engineering. However, due to differences in climate conditions and ecological engineering implementation, there are differences in the benefits of forestry projects. Some forestry project areas still have obvious vegetation degradation, and appropriate forestry management is necessary. This work provides a quantitative analysis of vegetation change and its driving factors in China, which will help to cope with future climate change and provide a reference for the implementation and management of ecological projects. [ABSTRACT FROM AUTHOR]

Aleppo Pine forests provide several ecosystem services for the local population as well as for the society in Tunisia. Knowing the citizens' preferences is crucial to guide forest management strategies. This study aims to determine the social demand for key benefits provided by forests using the choice experiment modelling. Results show a high social awareness of the benefits derived from forests suggesting that citizens are willing to support forest management activities, especially for promoting the local economy. [ABSTRACT FROM AUTHOR]

Ecological concerns caused by biological invasion have been considered an inevitable threat to global sustainability. The superior competitive ability of invasive plant species (IPS) has an impact on vegetation composition and loss of native flora. Recognising IPS at an early stage would significantly contribute to controlling invasive plants, protecting biodiversity and formulating appropriate strategies. Most of the studies available on invasive plants are descriptive and largely confined to non-woody species. The present study focused on the alien Gliricidia sepium, a tree species, to determine the invasive potential of its distribution in tropical dry deciduous forests of Central India. Forty square plots (25 × 25 m) were laid out at each uninvaded and invaded forest to enumerate phytosociological attributes to determine the impact of G. sepium on vegetation composition and community structure. Higher density (37.2 individuals ha−1), basal area (6.32 m2 ha−1) and importance value index (95.8) contributed by G. sepium clearly showed the suppression of seedlings, saplings and trees of native forest species at the invaded sites in terms of species richness, cover and other attributes as compared to at the uninvaded sites. Further, other invasive attributes such as higher seed production, dieback phenomenon, higher coppicing power and higher growth rate as observed during the study clearly affirmed the early speculation that the species might be invasive. The species has a strong potential to spread vigorously and may gradually become invasive throughout the country as already reported from various parts of India. In the present study area, G. sepium was introduced due to restoration and plantation programmes and our findings indicate its negative impact on the native vegetation. Thus, we strongly recommend the avoidance of this species for both plantation and restoration programmes, especially for Indian forests. The study helps in early recognition and rapid monitoring of G. sepium to control its spread throughout the country. [ABSTRACT FROM AUTHOR]

Wildfires are among the most serious disturbances that affect forest biodiversity, damaging both flora and fauna. In some burned areas, vegetation recovery is a long and complex process that requires the support of restorative actions. This study evaluated changes in forest structural features after a fire that affect habitat suitability for Rhinocryptids, an endemic group of bird species that are indicators of biodiversity in the temperate forests of South America. The study area was the Malleco National Reserve, Chile, where the main ecosystems are temperate forests. Four species from the Rhinocryptidae family of birds were used as bioindicator species. This group of species is endemic to temperate forests in South America. After fires occurred in 2002 and 2015, affecting temperate forests dominated by several Nothofagus species, two field inventories were carried out in 2016 and 2018. These inventories recorded the presence of Rhinocryptids and some forests structural features. Differences between the two stages of forest regeneration were assessed using statistical tests (T-test and Wilcoxon–Mann–Whitney test) and a classification model was proposed to determine the presence of Rhinocryptidae species. The statistical analysis of forest structural features showed that the variables more relevant in the habitat recuperation are vertical stratification (p-value < 0.001) and understory cover (p-value = 0.053). The trained decision tree to predict the presence of Rhinocryptidae species had an accuracy of 65.22%. This model showed that the coexistence of more than one Rhinocryptidae species occurs when vertical stratification is not mono-stratified and the density is lower than 335 trees ha−1. Our results can help forest managers to consider forest structure as a suitable habitat for certain major wildlife species when implementing post-fire recovery plans. [ABSTRACT FROM AUTHOR]

"The Politics of Deforestation and REDD+ in Indonesia: Global Climate Change Mitigation" by David Aled Williams explores the implementation of the REDD+ program in Indonesia from a political ecology perspective. The book examines the historical dynamics of forest management in Indonesia and highlights the marginalization of local communities' rights. It discusses the challenges faced by the REDD+ program, including lack of support from regional governments and corruption concerns. The author also explores the perspectives of local communities and the power contestation between various parties involved in the program. The book raises important questions about the relationship between politics, economics, and the environment, and sheds light on the social and justice dimensions of environmental policy. [Extracted from the article]

Sustainable forest management is important to maintain the ability of forests to grow and provide a range of products and environmental services while retaining their natural features. We find that income, radiata pine prices, trade, agricultural expansion, and environmental policies have a significant impact on timber harvesting in New Zealand. Increase in income, radiata pine prices, number of farms, horticulture plantation and bank loans lead to an increase in timber harvesting. On the other hand, environmental policies, especially those to mitigate climate change, decrease timber harvesting. [ABSTRACT FROM AUTHOR]

There is increasing evidence of the high deforestation rate of Ghana's forest reserves as a result of non-proper management. This study focused on deepening the understanding of the prospects and challenges in the management of the Mpameso Forest Reserve in Ghana. Based on a qualitative study, major stakeholders such as traditional heads, community members, and members of the forestry department were interviewed. Data were analyzed using thematic analysis. Results show that respondents were aware of the relevance of the forest reserve. Though there is a collaborative effort between the forestry commission, the chiefs, and the communities, challenges such as a lack of collaboration between chiefs and the forestry department in the district, and encroachment by community members, among other factors, affected the sustainability of the forest reserve.. The study recommends an alternative livelihood should be provided, consideration for the creation of an ecotourism park, and intensification of the enforcement of laws protecting the forest reserve and its sanctions. [ABSTRACT FROM AUTHOR]

In the context of increased demand for timber, forest managers must consider best practices in forest management and harvesting operations. Depending on the harvesting systems adopted, the uncertainties of the cost components may reflect the volatility of productivity and the expected value of the project. We investigated whether the uncertainties of the cost components have an influence on the productivity volatility and the expected value of the mechanized timber harvesting investment project with a feller buncher. Monthly feller buncher productivity volatilities were measured based on the absolute value of the percentage variation in the deviation of the cost and productivity components. We modeled productivity and cost components using geometric Brownian motion to estimate project value. Productivity showed a strong positive correlation with the cost components of economic depreciation, supervisor labor, fuel, and operator labor. Lubricating oil and economic depreciation were the most volatile cost components. Considering the deterministic economic analysis, the net present value was USD 3,849,619. When considering the probabilistic economic analysis, the average net present value was USD 187,319 ± USD 1,275,033. We verified that economic depreciation and fuel influenced feller buncher productivity. The uncertainties of these components affect the economic viability of the feller buncher in Eucalyptus plantations. [ABSTRACT FROM AUTHOR]

The aim of this study was aimed to estimate the economic value of timber products from the forest stands that are potentially saved from wildfires after improving road standards. The study was implemented in the Alanya Forest Enterprise Directorate (FED) in the Mediterranean city of Antalya, Turkey. In the solution process, the possible increase in the accessible forest areas with improved forest road standards was investigated by using GIS-based network analysis methods. In the next step, the timber production in the forest areas potentially saved from the wildfire was calculated based on parameters such as site index, rotation period, and stand structure. Then, the economic value of timber product types was calculated using market prices. The results indicated that increasing the design speed on improved forest roads reduced the arrival time of firefighting teams to the forests, which consequently increased the accessible forest areas within the critical response time. It was found that the accessible forest areas within the critical response time increased from 47,231 hectares to 59,354 hectares when standards of the forest roads were improved. This saved 12,123 hectares of additional forest area from the wildfire in the Alanya FED. The cost of road improvement activities was estimated at US$ 2,286,998. It was calculated that the total timber products obtained from the forest area potentially saved was about 94,721 m3, and worth US$7,545,579 at market prices. The results can be used by policymakers in determining the potential investments in improving forest road standards to enhance the efficiency of firefighting activities. [ABSTRACT FROM AUTHOR]

In the southern United States (US), female forest landowners (FeFLs) constitute 27% of family forest landowners, owning approximately 12.1 million ha of forestland. With changing demographic trends, FeFLs will likely own more forestlands in the foreseeable future. Understanding FeFLs' perceptions of ecosystem services (ESs) is vital as their management decisions will impact the flow of forest-based ESs. Our study used a mental model approach to comprehensively understand FeFLs' socio-cultural perceptions of ESs. Interviews with 39 FeFLs in Georgia, US, highlighted diverse perceptions of forest-based ESs encompassing cultural, provisioning, regulating, and supporting services. The FeFLs' mental model revealed five thematic areas on ESs perceptions: economics, personal enjoyment, family and heritage, forestland as a place for social activity, and environmental benefits. The economics theme emerged distinctly regardless of their ownership type or forestland proximity, whereas personal enjoyment, family and heritage, and forestland as a place for social activity demonstrated place attachment. Co-owners linked forest management more closely to economics than sole-owners. Residential FeFLs valued social benefits, while non-residential landowners emphasized biodiversity significance. Our findings provide crucial insights for shaping inclusive strategies and policies, enhancing forest management among FeFLs, fostering a sense of community, and ensuring the sustainability of forestlands in the region. [ABSTRACT FROM AUTHOR]

The article discusses Kohei Saito's book "Marx in the Anthropocene: Towards the Idea of Degrowth Communism," which explores the ecological aspects of Karl Marx's work and proposes the concept of "degrowth communism." Saito argues that Marx's thinking was influenced by ecological issues and that his later work shows a shift away from a Promethean productivist view of nature. Saito also examines Marx's interest in ecology, the natural sciences, and the history of the commons, suggesting that Marx embraced a new worldview of degrowth communism. The article acknowledges the book's contribution to the understanding of Marx and Marxism, but also points out some limitations and unanswered questions. [Extracted from the article]

Private forest land policies in the U.S. differ by state and range from regulatory to non-regulatory. The state of California has a highly regulatory policy system to ensure sustainable forest management, and the state's family forest landowners, who hold 20% of the state's forests, navigate this regulatory system to achieve their management objectives. We conducted semi-structured interviews with 33 family forest landowners to better understand their perceptions of state forest policies, including the policies' efficacy and how they impact landowner behavior. We found that participants voiced general acceptance of California's forest policies, though they described significant concerns because of financial burdens and regulatory uncertainty. They had nuanced views regarding how the policies protect public trust resources and private property rights, suggesting that landowners' public responsibilities and private rights are not always at odds. [ABSTRACT FROM AUTHOR]

The article discusses the rediscovery of Glaucomys volans, also known as the southern flying squirrel, in Honduras, a species classified as 'Deficient Data' on the Honduran Red List. Efforts are being made to understand the natural history of this species through non-invasive methods like camera-trapping, which has revealed valuable insights into their behavior and ecology. The study highlights the importance of using camera-trapping for ecological monitoring to aid in conservation efforts for the southern flying squirrel in Honduras. [Extracted from the article]

Lorelei Louise Norvell, a respected mycologist, made significant contributions to the field of mycology throughout her career. She had a passion for fungi and published articles on various topics related to mushrooms. Lorelei's interest in mycology began after joining the Oregon Mycological Society in the 1970s, and she later pursued a Ph.D. in mycology at the University of Washington. She was known for her expertise in the taxonomy of mushrooms and served as the editor-in-chief of the journal Mycotaxon. Lorelei was also involved in education, teaching linguistics and mycology at various institutions. She was highly regarded by her colleagues and had a positive and respectful approach in her interactions. [Extracted from the article]

There is growing interest in continuous cover forestry in Sweden. The historical domination of even-aged forest management means there is a need to focus on methods for transforming even-aged to uneven-aged stands. Practical conversion management today is highly adaptive, and the possibility of failures, such as persistent lack of tree recruitment, must be allowed for. We used simulations to evaluate various scenarios in which conversion management is introduced at different development stages in even-aged stands and then abandoned in favour of clear-felling. A shift towards an inverse J-shaped diameter distribution at the end of the simulations was most evident in northern Sweden and with an early introduction of conversion forestry. The largest losses were incurred in a scenario where the conversion management started with removing larger trees at pre-commercial thinning: it reduced the volume of production by up to 25% and, if clear-felled, resulted in a lower land expectation value than conventional management. Earlier decision to abandon conversion management reduced the losses, but the effect of timing was minor. In summary, the results indicate that conversion management could be started and abandoned without any major economic loss during the timeframe of a normal rotation. [ABSTRACT FROM AUTHOR]

Roadside forests are susceptible to damage from storm events given their exposure and related vulnerability to impacts of multiple stressors. Challenges to management are further complicated in exurban landscapes, where roadside forests are interspersed among fragmented land ownership entities with diverse management objectives. Our objective was to evaluate forest management community information sharing about biophysical stressors affecting roadside vegetation for multiple forestland tract types in Connecticut. Data were collected using semi-structured interviews (n = 39). Results from social network analysis illustrated network structure and interrelationship patterns among community members. Overall network cohesion was low. Core network positions were dominated by few stakeholders. Communication occurred among subgroups comprised of individuals representing several different stakeholder occupation groups. Low cohesion may be inherent of the fragmented exurban landscape with relations focused on shared objectives. Community longevity may depend upon maintaining core-position connections and a less-centralized network composed of individuals from various occupations. [ABSTRACT FROM AUTHOR]

Timber sales from the US National Forest System (NFS) can provide ecological and economic benefits. Unsold ("no-bid") offerings can result in delays, additional costs, and missed targets. We used mixed methods, including analysis of administrative data, synthesis of research, and semi-structured interviews to understand situations considered "no-bid" offerings by different stakeholders. We measured prevalence, identified causes, and generated a framework for communicating interlinkages. From 2007 to 2020, the volume not sold at first offering was 11.9% nationally. However, a substantial amount is sold subsequently, leaving 2.7% never sold. Regions with the highest percentage never sold include Alaska, Southwestern, and Pacific Southwest. A new conceptual framework developed from a literature review and interviews with NFS and industry employees identified proximate causes and underlying factors. Proximate causes include road construction, equipment requirements, and timber condition; whereas underlying factors include staffing, communication, and appraisal methods. These insights can aid communication and help develop future strategies. [ABSTRACT FROM AUTHOR]

Protecting forest ecosystems is a critical action for addressing both the climate and biodiversity crises. Effective long-term management of forests requires landscape approaches, but evaluating the management actions is a key challenge. Previous research has suggested evaluation should focus on three interrelated pillars: ecosystem integrity, effective planning, and strong governance. This paper presents a framework for evaluating ecosystem integrity based on the 'Principle, Criteria, Indicator and Verifier' (PCIV) method. The key principle used is ecosystem autopoiesis – the ability of a system for self-generation and maintenance by creating its own parts. Four key criteria are applied, accompanied by a set of nine indicators. Verifiers for each indicator are suggested for which feasible data sources are likely available. The use of the three-pillar framework, including ecosystem integrity, is illustrated using three hypothetical cases representing different forest landscape contexts. Such evaluation can provide practical, consistent, repeatable, and comparable information for stakeholders and decision makers. [ABSTRACT FROM AUTHOR]

Forest damage caused by heavy wet snow accumulation in the canopy is the second most important abiotic forest disturbance agent in Nordic conifer stands after wind. The extent and frequency of snow damage in the future climate in the Nordic region is a major uncertainty. Few mechanistic models of snow damage risk to trees exist that could support forest management scenario analysis and decision making. We propose a snow damage risk model consisting of a numerical weather prediction-based snow accumulation model for forest canopies and a mechanistic critical snow load model. Snow damage probability predictions were validated on snow breakage data from the winters of 2016 and 2018 covering 3.5 million individual trees in south-eastern Norway derived from pre- and post-damage aerial laser scanning campaigns. The proposed model demonstrated satisfactory damage and no-damage class separation with an AUC of 0.72 and 0.77 in Norway spruce and Scots pine, respectively, and an F1 score of 0.7 in conifers taller than 10 m that suffered moderate stem breakage. The model achieved a classification accuracy that is comparable to that of statistical models but is simpler and requires fewer inputs. [ABSTRACT FROM AUTHOR]

Continuous cover forestry (CCF) is gaining popularity as an alternative to rotation forest management (RFM), especially in forests with multiple uses. The success of CCF depends on the amount and quality of remaining seedlings, but the effect of harvesting on their status is not well known. In the present study, the proportion and number of undamaged seedlings after harvesting (and soil scarification) in Scots-pine-dominated stands in Northern Finland were modelled by applying logistic binomial mixed-effects and negative binomial count data models. The treatments included both CCF (gap cutting and selection cutting) and RFM (clearcutting and seed tree cutting) harvesting methods. The clearcut areas and most seed tree areas were treated with disc trenching. In the clearcutting and seed tree cutting areas, 25–34% of the inventoried seedlings were damaged. In the gap cutting and selection cuttings, c. 7% and 12% of the seedlings were damaged respectively. Harvesting machinery traffic and soil scarification were the most important causal agents of seedling damage. An increase in slash coverage also significantly increased seedling damage. The average number of undamaged seedlings in the selection cutting areas was ca. 1500 pcs ha−1, indicating at least satisfactory regeneration potential in the experimental stands. [ABSTRACT FROM AUTHOR]

Bark beetle (Ips typographus) outbreaks have the potential to damage large areas of spruce-dominated forests in Scandinavia. To define forest management strategies that will minimize the risk of bark beetle attacks, we need robust models that link forest structure and composition to the risk and potential damage of bark beetle attacks. Since data on bark beetle infestation rates and corresponding damages does not exist in Norway, we implement a previously published meta-model for estimating I. typographus damage probability and intensity. Using both current and projected climatic conditions we used the model to estimate damage inflicted by I. typographus in Norwegian spruce stands. The model produces feasible results for most of Norway's climate and forest conditions, but a revised model tailored to Norway should be fitted to a dataset that includes older stands and lower temperatures. Based on current climate and forest conditions, the model predicts that approximately nine percent of productive forests within Norway's main spruce-growing region will experience a loss ranging from 1.7 to 11 m3/ha of spruce over a span of five years. However, climate change is predicted to exacerbate the annual damage caused by I. typographus, potentially leading to a doubling of its detrimental effects. [ABSTRACT FROM AUTHOR]

Multifunctional forest management should provide the opportunity to create, conserve, modify or eliminate forest roads. Within protected areas, it is difficult to make a single assessment of the degree of accessibility to different forest areas, having to mediate among productive forestry, protection needs and other benefits deriving from forest stands. A GIS-based methodology, with the support of a Forest Information System (FIS) and available Forest Plans for the study area, were applied to create an accessibility map (based on the forest roads network) for the Abruzzo, Lazio, and Molise National Park (PNALM). Results were related to several FIS metadata, highlighting that accessibility in the study area was sufficient, but not optimal, in the productive management units, being rather poor in those where soil protection and biodiversity conservation are the main functions (only 38.8% of them were accessible). Forest roads density (28.5 m ha−1) was not homogeneously distributed within the study area and the ratio between forest road length (199.4 km) and planned forest surface (13,355.3 ha) is only 14.9 m ha−1. In contrast to what is commonly found in forest accessibility works, the innovative element of this study was the involvement of PNALM's technical office in evaluating the results and exploring the opportunity to adopt a different policy for forest roads network management. [ABSTRACT FROM AUTHOR]

The awareness of machine productivity is essential when considering the management of mechanized forest harvesting costs, an important issue for sustainable economic planning, especially when considering the significant contribution of this activity to the total cost of timber production. The aim of the study was to evaluate the productivity and production costs of the harvester (cut-to-length system) according to the average volume per tree (AVT), in stands located in the northeast region of Brazil, which varied from 0.16 to 0.58 cubic meters without bark (m3 wb). We considered the commercial volume of wood in this assessment. The productivity of the harvester in stands with different characteristics, including small, medium and large trees, was evaluated. The time study method was employed to perform the technical analysis, which assisted in the calculation of productivity, mechanical availability and utilization rate. Regarding the economic analysis, the fixed and variable costs were evaluated. The results revealed an operating cost of USD 101.75 he−1 for the harvester, being 16.48% for fixed costs and 83.52% for variable costs. The costs of maintenance and repairs, labor, fuel and depreciation represented 84.42% of this total. The harvester showed a lower production cost for large trees (higher average volume per tree). Considerable machine efficiency reduction was observed in a low productivity forest, significantly increasing the costs per cubic meter harvested, varying from USD 2.56 m−3 (large trees) to USD 5.75 m−3 (small trees). [ABSTRACT FROM AUTHOR]

There have been assessments of the carbon (C) offsetting potential of China's forest sector using historical inventories and future projections. Here, we critically reflect on the assessments we have done and carefully synthesize our findings of China's C sequestration by forest ecosystems and storage by harvested wood products (HWPs). We show that China raised its forest stock volume by 5.069 × 109 m3 during 2006–2020, giving a biomass C uptake of 2.592 petagrams (Pg). With a cumulative C emission of 37.031 Pg during the same period of time, the offsetting ratio of forest biomass is 6.99%. If C stored in HWPs during the period (0.491 Pg) is included, that ratio rises to 8.33%; further counting C sequestered by forest soil (1.277 Pg) boosts the ratio to 11.76%. With a stock volume increase of 14.813 × 109 m3 from 2006 to 2060, projected under a conventional scenario, the forest sector C removal could reach 9.286 Pg without including soil C or 13.017 Pg otherwise, offsetting 10.50% or 14.72% of the cumulative emission of 88.425 Pg. These results indicate that the forest sector has played and will continue to play a significant a role in its decarbonizing drive, but the government has been conservative in setting its targets, particularly for the increase of forest stock volume. Future policy and research efforts must effectively link the country's forest structure, quality, and growth, and thus C sequestration and storage, with improved forest management and wood products manufacturing. [ABSTRACT FROM AUTHOR]

Extensions of harvest rotation length are a commonly proposed method to increase carbon sequestration in forests that are managed for timber. However, several limitations constrain realistic storage potential in intensively managed forests. We present an analysis of the realistic potential for additional carbon sequestration via rotation extension across the Pacific Northwest of the United States, an important timber-producing region, taking into account specific limitations. We first assess the limitations on rotation length imposed by the stand age at which wood production would decline over the long term, and then incorporate the age at which trunk diameter surpasses a reasonable threshold for logging. Using publicly available forest survey data, we empirically model growth parameters across this region for use in this analysis. Despite uncertainties, we find some opportunities for rotation length extension in western Washington with variation by sub-region and timber species, emphasizing the importance of geography- and species-specific growth parameters for forest carbon management even within a general region. However, the total realistic potential for sequestration under this improved forest management scenario is small relative to gross emissions: the estimated cumulative additional sequestration in aboveground live biomass would offset one year of gross emissions in the case of Washington state, while a decadal-scale rotation extension implemented gradually over the landscape to avoid a total pause on commercial timber production would take on the scale of a century to achieve. Overall, practical considerations greatly limit the realistic potential of this carbon sequestration strategy. [ABSTRACT FROM AUTHOR]

Urban forests play a crucial role for the wellbeing of city dwellers, and their importance for people has been emphasised during the COVID-19 pandemic. This exploratory study analyses the visit patterns and visitor attitudes and perceptions in a peri-urban forest nearby Bonn, Germany, as well as the impact of the lockdown. Methodically, we combined automated visitor counting with a total of 345 on-site interviews. Respondents were asked a variety of open-ended and closed questions on various aspects of forest management and recreation. The results show that shortly after the inception of the lockdown the number of forest visitors doubled and the visit pattern changed markedly. In contrast, people's associations with the forest remained rather stable. The forest visitors interviewed primarily associated the forest with tranquillity, recreation and fresh air, and they were generally positive about forest management. However, these expectations conflicted with the sense of crowdedness experienced during the lockdown, when novel forest uses and new motivations for visiting the forest arose, with an important focus on the forest as a place for social interaction. These were mainly a result of the lockdown restrictions, rather than COVID-19 itself, which left people with more time and flexibility, and less alternative activities. The results highlight the importance of forest management in catering to people's expectations and ultimately for the role that forests play for people's wellbeing. This was the case before the lockdown but arguably even more so during, in response to a variety of needs resulting from unprecedented circumstances. [ABSTRACT FROM AUTHOR]

Cultural land-use is an important driver of ecosystem change, influencing the composition of species across landscapes and through time. Recent research in northwestern North America has shown that historical Indigenous land-use and forest management has resulted in relict forest gardens dominated by edible fruit, nut, and berry producing trees and shrubs – many of which continue to grow adjacent to archaeological village sites today. Our research combines archaeological and ecological methods to better understand the historical ecology of seven forest gardens in the Pacific Northwest. Vascular plant communities at all sites are evaluated for distinctiveness using ANOSIM, NMDS, and indicator species analyses. We identify 15 forest garden indicator species, all of which are culturally significant edible fruit or root-bearing species. We then present the results of an intensive historical-ecological study of one site in Laxyuubm Gitselasu (Ts'msyen). Paleoethnobotanical data, soil and tree ring analyses, and radiocarbon dates show that forest management in the Gitsaex forest garden of Gitselasu pre-dates settler colonialism and shows that people likely modified soils and otherwise enhanced their immediate environment to increase the productivity of desired plant species. Given the importance of Indigenous peoples' role in sustaining forested foodsheds, there is an ongoing and urgent need to support their revitalization and management and better understand the integrated cultural practices and ecological processes that result in these vast cultural landscapes. [ABSTRACT FROM AUTHOR]

Seasonally dry tropical forests are ecosystems of high endemism and floristic diversity, but they have been relatively not well-studied ecosystems and are very much threatened by anthropic pressures. This study aimed to evaluate the dendrometric and horizontal structure characteristics of the population of 12 endemic plant species in the semideciduous forest of the Equatorial Pacific Coastal Cordillera of the Machalilla National Park, Manabí, Ecuador. This is one of the most extensive protected areas on the Ecuadorian coast, located in the Tumbes-Chocó-Magdalena biogeographic region. It is considered one of the 25 hotspots worldwide. We selected 12 species that hypothetically co-exist in this semideciduous forest (Bursera graveolens, Eriotheca ruizii, Handroanthus chrysanthus, Ziziphus thyrsiflora, Geoffroea spinosa, Myroxylon balsamum, Priogymnanthus apertus, Melicoccus bijugatus, Nectandra reticulata, Simira ecuadorensis, Coccoloba ruiziana, Klarobelia lucida). We studied five 2500 m2 transects, where dendrometric variables (tree height, diameter at breast height-DBH, basal area, altimetric and diameter classes) were evaluated. We evaluated the horizontal structure variables of populations like absolute/relative abundance, dominance and frequency, and the importance value index (IVI and IVN). In 12,500 m2, the results identified 331 individuals. M.balsamum was the highest species (9.41 m), while E.ruizii had the highest DBH (21.03 cm) and the biggest basal area (0.05 m2). The species with the highest absolute/relative abundance and frequency were S.ecuadorensis and H.chrysanthus, and the latter had the highest absolute dominance (1.23 m2•ha−1). S.ecuadorensis presented the highest importance value index based on 100 and 300, followed by H.chrysanthus and Z.thyrsiflora. P.apertus, M.balsamum, E.ruizii and C.ruiziana obtained intermediate values. The least ecological weight was for N.reticulata, K.lucida, M.bijugatus and G.spinosa. No B.graveolens individuals were observed in the studied transects in this forest because this species was found at altitudes < 240 m a.s.l. The results of the altimetric and diameter classes indicated that the studied sector corresponds to a relatively young secondary forest affected by natural and anthropic factors. Seasonally dry tropical forests are relatively not well-studied ecosystems. Consequently, we suggest to policymakers, to incentive the development of research on dendrology and horizontal structure of endemic forest species of economic, social and cultural interest in these ecosystems to facilitate decision-making in forest management. The illegal extraction of wood in seasonally dry tropical forests is one of the main factors that lead to the degradation of these vegetal formations; therefore, we suggest to managers and politicians to implement surveillance measures and control mechanisms to prevent the illegal extraction of wood in these ecosystems. Seasonally dry tropical forests are ecosystems of high endemism and floristic diversity, but they are very much threatened by anthropic pressures. We suggest to policymakers: (1) to develop integrated management plans prioritizing the conservation of protected ecosystems and forest species of economic, social and cultural interest, and (2) to promote environmental education on the importance of conserving protected ecosystems and key forest species. Los bosques tropicales estacionalmente secos son ecosistemas de alto endemismo y diversidad florística; pero han sido ecosistemas relativamente poco estudiados y muy amenazados por presiones antrópicas. El objetivo del presente estudio fue evaluar las características dendrométricas y de estructura horizontal de la población de doce especies arbóreas endémicas en el Bosque Semideciduo de la Cordillera Costera del Pacífico Ecuatorial en el Parque Nacional Machalilla (PNM), Manabí, Ecuador. 'Ésta es una de las áreas protegidas más extensas de la costa ecuatoriana, localizada en la región biogeográfica Tumbes-Chocó-Magdalena, considerada uno de los 25 hotspots a nivel mundial. Se seleccionaron doce especies, las cuales hipotéticamente coexisten en el bosque semideciduo estudiado (Bursera graveolens, Eriotheca ruizii, Handroanthus chrysanthus, Ziziphus thyrsiflora, Geoffroea spinosa, Myroxylon balsamum, Priogymnanthus apertus, Melicoccus bijugatus, Nectandra reticulata, Simira ecuadorensis, Coccoloba ruiziana, Klarobelia lucida). Estudiamos 5 transectos de 2500 m2, en los cuales se evaluaron variables dendrométricas (altura del árbol, diámetro a la altura del pecho-DAP, área basal, clases altimétricas y diamétricas), y variables de estructura horizontal de las poblaciones (abundancia, dominancia y frecuencia, absoluta y relativa, e índice de valor de importancia – IVI e IVN). En total se identificaron 331 individuos en 12.500 m2. M.balsamum fue la especie con mayor altura (9,41 m); mientras que E.ruizii mostró el mayor DAP (21,03 cm) y área basal (0,05 m2). Las especies con mayor abundancia y frecuencia (absoluta y relativa) fueron S.ecuadorensis y H.chrysanthus, siendo esta última especie la que mostró mayor dominancia absoluta (1,23 m2•ha−1). S.ecuadorensis registró los mayores valores de IVI y IVN, seguida de H.chrysanthus y Z.thyrsiflora. P.apertus, M.balsamum, E.ruizii y C, ruiziana mostraron valores intermedios; mientras que N. reticulata, K. lucida, M. bijugatus y G.spinosa fueron las especies con menor peso ecológico. En los transectos no se observaron individuos de B. graveolens, lo cual indicó que esta especie se encontraba en cotas inferiores a los 240 m s.n.m. Los resultados observados en las clases altimétricas y diamétricas indicaron que el sector estudiado corresponde a un bosque secundario relativamente joven, que ha sido afectado por factores naturales y antrópicos. [ABSTRACT FROM AUTHOR]

Owls (Strigiformes) play an important ecological role as predators that structure and organize biological communities. Specialized owl species dependent on old-growth forests have suffered declines because of forest loss or degradation by human activities. Few studies have been conducted on Neotropical owls, especially in the Piedmont Forest of Northwestern Argentina. The scarcity of information on habitat requirements and the effect of human impacts preclude the establishment of conservation and management activities. The human footprint index (HFI) is a tool for mapping human impacts on biodiversity that is used at global and regional scales, based on the estimated and standardized contribution of different human impact variables (e.g. road networks, urban centers, agricultural land, etc.). The objectives of this work were to: 1) Determine the call rate of five owl species in the Piedmont Forest of Northwestern Argentina, 2) relate forest structure to the call rate of owl species, and 3) relate human footprint index to the call rate of owls. We placed 28 automatic recorders in the Piedmont Forest, in sites with low and high Human influence, and characterized the forest structure around each recorder within a circular plot of 25 m diameter. We obtained 241 vocalizations in 168 intervals of 2 h for Ferruginous pygmy owl (Glaucidium brasilianum), Tropical screech-owl (Megascops choliba), Black-banded owl (Ciccaba huhula), Spectacled owl (Pulsatrix perspicillata), and Buff-fronted owl (Aegolius harrisii). We found that for Tropical screech-owl live tree basal area had a positive and diameter at breast height standard deviation had a negative influence on call rate. While for Black-banded owl, the dead tree density had a positive and human footprint index >1 had a negative influence on call rate. For Spectacled owl, dead tree density and human footprint index >1 had a negative influence on call rate. We provide first insights into the effects of forest structure and human influence on the call rate of owls in the Piedmont Forest of Northwestern Argentina, information that may guide forest management guidelines and conservation strategies. [ABSTRACT FROM AUTHOR]