21 results on '"Giuseppe Fenu"'
Search Results
2. Incorporating the visibility analysis of fire lookouts for old-growth wood fire risk reduction in the Mediterranean island of Sardinia
- Author
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Sergio Fantini, Mauro Fois, Romina Secci, Paolo Casula, Giuseppe Fenu, and Gianluigi Bacchetta
- Subjects
Geography, Planning and Development ,Water Science and Technology - Published
- 2022
3. Conservation status of the Italian flora under the 92/43/EEC ‘Habitats’ Directive
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A. Croce, Maria Silvia Pinna, Giuseppe Fenu, Simone Orsenigo, Daniela Bouvet, Chiara Montagnani, Elena Barni, Fabio Conti, Thomas Abeli, Consolata Siniscalco, Stefania Ercole, Domenico Gargano, Luca Strazzaboschi, Annalena Cogoni, Marta Puglisi, Gianniantonio Domina, Donatella Cogoni, Graziano Rossi, Marco Sarigu, Maurizio Vena, Giulio Ferretti, Emilio Di Gristina, Elisa Proietti, G. Oriolo, Elena Zappa, Matilde Gennai, Fabrizio Bartolucci, Claudia Turcato, Annalisa Santangelo, Gianluigi Bacchetta, V. Giacanelli, Fenu, G., Siniscalco, C., Bacchetta, G., Cogoni, D., Pinna, M. S., Sarigu, M., Abeli, T., Barni, E., Bartolucci, F., Bouvet, D., Cogoni, A., Conti, F., Croce, A., Di Gristina, E., Domina, G., Ferretti, G., Gargano, D., Gennai, M., Montagnani, C., Oriolo, G., Orsenigo, S., Proietti, E., Puglisi, M., Rossi, G., Santangelo, A., Strazzaboschi, L., Turcato, C., Vena, M., Zappa, E., Giacanelli, V., Ercole, S., Fenu, Giuseppe, Siniscalco, Consolata, Bacchetta, Gianluigi, Cogoni, Donatella, Silvia Pinna, Maria, Sarigu, Marco, Abeli, Thoma, Barni, Elena, Bartolucci, Fabrizio, Bouvet, Daniela, Cogoni, Annalena, Conti, Fabio, Croce, Antonio, Di Gristina, Emilio, Domina, Gianniantonio, Ferretti, Giulio, Gargano, Domenico, Gennai, Matilde, Montagnani, Chiara, Oriolo, Giuseppe, Orsenigo, Simone, Proietti, Elisa, Puglisi, Marta, Rossi, Graziano, Santangelo, Annalisa, Strazzaboschi, Luca, Turcato, Claudia, Vena, Maurizio, Zappa, Elena, Giacanelli, Valeria, Ercole, Stefania, Fenu, G, Siniscalco, C, Bacchetta, G, Cogoni, D, Silvia Pinna, M, Sarigu, M, Abeli, T, Barni, E, Bartolucci, F, Bouvet, D, Cogoni, A, Conti, F, Croce, A, Di Gristina, E, Domina, G, Ferretti, G, Gargano, D, Gennai, M, Montagnani, C, Oriolo, G, Orsenigo, S, Proietti, E, Puglisi, M, Rossi, G, Santangelo, A, Strazzaboschi, L, Turcato, C, Vena, M, Zappa, E, Giacanelli, V, Ercole, S, Fenu G., Siniscalco C., Bacchetta G., Cogoni D., Pinna M.S., Sarigu M., Abeli T., Barni E., Bartolucci F., Bouvet D., Cogoni A., Conti F., Croce A., Di Gristina E., Domina G., Ferretti G., Gargano D., Gennai M., Montagnani C., Oriolo G., Orsenigo S., Proietti E., Puglisi M., Rossi G., Santangelo A., Strazzaboschi L., Turcato C., Vena M., Zappa E., Giacanelli V., and Ercole S.
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trends ,monitoring activitie ,Flora ,Italian National Report ,monitoring activities ,Plant Science ,Biodiversity conservation ,biogeographical regions ,Ecology, Evolution, Behavior and Systematics ,BIO/03 - BOTANICA AMBIENTALE E APPLICATA ,biogeographical region ,Ecology ,Settore BIO/02 - Botanica Sistematica ,fungi ,protected flora ,Directive ,pressures and threats ,stomatognathic diseases ,trend ,Geography ,Habitat ,Settore BIO/03 - Botanica Ambientale E Applicata ,Plant species ,Conservation status ,pressures and threat ,Habitats Directive - Abstract
The results of the 4th National Report for the Italian flora under the 92/43/EEC ‘Habitats’ Directive are presented. The outcomes showed a general negative conservation status for plant species, with the worst situation being in the Mediterranean bioregion. At the National level, significant monitoring and conservation activities are required.
- Published
- 2021
4. Implementation of IUCN criteria for the definition of the Red List of Ecosystems in Italy
- Author
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L. Zavattero, Simonetta Fascetti, G. Capotorti, Domenico Gargano, R. Copiz, Edoardo Biondi, Giovanni Spampinato, Daniele Viciani, Simona Casavecchia, R. Frondoni, S. Bonacquisti, Lorenzo Antonino Gianguzzi, Marina Allegrezza, Consolata Siniscalco, Gianluigi Bacchetta, Bruno Enrico Leone Cerabolini, L. Facioni, P. Sarandrea, Elena Barni, E.R. Tazzari, Marco Caccianiga, Ludovica Oddi, Roberto Venanzoni, Maria Silvia Pinna, Fabio Attorre, D. Galdenzi, Lorella Dell'Olmo, Leonardo Rosati, Giuseppe Fenu, M. Paolanti, Fausto Manes, E. Del Vico, Carlo Blasi, P. Brandmayr, Alessandro Chiarucci, Giulio Tesei, Simone Orsenigo, Emanuela Carli, Graziano Rossi, Capotorti G., Zavattero L., Copiz R., Del Vico E., Facioni L., Bonacquisti S., Frondoni R., Allegrezza M., Attorre F., Bacchetta G., Barni E., Biondi E., Brandmayr P., Caccianiga M.S., Carli E., Casavecchia S., Cerabolini B.E.L., Chiarucci A., Dell'Olmo L., Fascetti S., Fenu G., Galdenzi D., Gargano D., Gianguzzi L.A., Manes F., Oddi L., Orsenigo S., Paolanti M., Pinna M.S., Rosati L., Rossi G., Sarandrea P., Siniscalco C., Spampinato G., Tazzari E.R., Tesei G., Venanzoni R., Viciani D., and Blasi C.
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0106 biological sciences ,010504 meteorology & atmospheric sciences ,Collapse (topology) ,Plant Science ,Potential natural vegetation ,potential natural vegetation ,010603 evolutionary biology ,01 natural sciences ,mapping and assessment ecosystems and their services ,IUCN Red List ,Ecosystem ,ecoregions ,mapping and assessment ecosystems and their service ,Biodiversity conservation strategie ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences ,threats ,biodiversity conservation strategies ,business.industry ,Environmental resource management ,ecosystem risk assessment ,Geography ,Work (electrical) ,business ,ecoregion - Abstract
The present work is aimed at presenting the data, methods and criteria that are being used for the assessment of ecosystem collapse risk in Italy.
- Published
- 2020
5. Quantifying gait impairment in individuals affected by Charcot-Marie-Tooth disease: the usefulness of gait profile score and gait variable score
- Author
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Giuseppina Pilloni, A. Vannelli, Giuseppe Fenu, Maria Giovanna Marrosu, Eleonora Cocco, Massimiliano Pau, Micaela Porta, Federica Corona, Lorena Lorefice, Jessica Frau, Giovanni Marrosu, Cinzia Pisano, E Mamusa, and Giancarlo Coghe
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030506 rehabilitation ,Foot drop ,medicine.medical_specialty ,business.industry ,Rehabilitation ,Biomechanical Phenomena ,Clinical Practice ,03 medical and health sciences ,Tooth disease ,0302 clinical medicine ,Gait (human) ,Gait impairment ,Physical medicine and rehabilitation ,Charcot-Marie-Tooth Disease ,Gait analysis ,medicine ,Humans ,Disabled Persons ,medicine.symptom ,Gait Analysis ,0305 other medical science ,business ,Gait ,030217 neurology & neurosurgery - Abstract
Background: Gait analysis is a reliable tool to characterise ambulation in Charcot-Marie-Tooth, the obtained are complex data makes its use scarce in clinical practice. The use of synthetic measure...
- Published
- 2018
6. Comparing the flowering phenology between the only natural and a translocated population of Dianthus morisianus
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Anna Nebot, Gianluigi Bacchetta, Giuseppe Fenu, and Donatella Cogoni
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0106 biological sciences ,education.field_of_study ,Reproductive success ,biology ,Phenology ,Dianthus ,fungi ,Population ,food and beverages ,Caryophyllaceae ,Plant Science ,biology.organism_classification ,medicine.disease_cause ,010603 evolutionary biology ,01 natural sciences ,Horticulture ,Natural population growth ,Pollinator ,Pollen ,medicine ,education ,010606 plant biology & botany - Abstract
The reproductive success of a plant species depends to some extent on its flowering phenology. Thus, it is important to understand the flowering period, the flowering intensity and the synchrony of flowering to determine their respective influence on the reproductive success of the plant species. This study was conducted on the only natural population of Dianthus morisianus and on the first attempted translocation of the species. The aim of this study was to analyse the flowering phenology of the two populations to understand each and compare them. To analyse the flowering phenology, the initiation date, the intensity, the maximum flowering moment, the synchrony and the duration of flowering were tested. The studied plants had different flowering durations between years and the intensity and number of stems were significantly lower in the offspring of translocated plants than the natural plants. The early flowering plants had a longer flowering period and produced more flowers than those that flow...
- Published
- 2018
7. Genetic variability of the first-generation of Ribes sardoum, a threatened relic plant requiring translocation measures
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Ilaria Bruni, Giuseppe Fenu, Marco Porceddu, Gianluigi Bacchetta, Sandra Citterio, Rodolfo Gentili, Gentili, R, Fenu, G, Porceddu, M, Bruni, I, Citterio, S, and Bacchetta, G
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0106 biological sciences ,BIO/03 - BOTANICA AMBIENTALE E APPLICATA ,Genetic diversity ,Cultivated plant taxonomy ,010504 meteorology & atmospheric sciences ,translocation ,food and beverages ,Chromosomal translocation ,Plant Science ,Biology ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,First generation ,threatened Mediterranean flora ,Ribes sardoum ,Natural population growth ,Botany ,Threatened species ,in situ conservation strategie ,Genetic variability ,microrefugia ,Ecology, Evolution, Behavior and Systematics ,ex situ multiplication ,0105 earth and related environmental sciences - Abstract
The genetic variability of the ex situ cultivated plants of Ribes sardoum, obtained from seeds collected from the unique natural population, was investigated. Our results revealed that plants cultivated ex situ captured a higher amount of genetic diversity and this will be useful in future translocation of this threatened species.
- Published
- 2018
8. Identifying and assessing the efficiency of different networks of a fine-scale hierarchy of biodiversity hotspots
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Gianluigi Bacchetta, Giuseppe Fenu, and Mauro Fois
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0106 biological sciences ,Vascular plant ,Hierarchy ,Ecology ,biology ,business.industry ,010604 marine biology & hydrobiology ,Environmental resource management ,Context (language use) ,Plant Science ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Mediterranean Basin ,Biodiversity hotspot ,Geography ,Ranking ,Species richness ,business ,Scale (map) ,Ecology, Evolution, Behavior and Systematics - Abstract
Background: For prioritising practical conservation measures in areas of high endemic plant diversity, a fine-scale hierarchy of sites needs to be established. In this context, conservation sites designed at local and regional levels are considered a network of interconnected areas.Aims: The main aim was to identify two hierarchical levels of a network of conservation sites, called ‘micro hotspots’ and ‘nano hotspots’, and test their efficiency for achieving conservation objectives across the island of Sardinia, Mediterranean Basin.Methods: We analysed the spatial distribution of endemic vascular plant species (EVPS) richness. Additionally, the area, perimeter, connectivity and surplus costs for the protection of all endemic plant populations were used as ranking criteria for a hierarchical classification.Results: We identified eight micro hotspots and 82 nano hotspots. Amongst the three possible solutions compared, the integrated network of micro and nano hotspots resulted in more effective conservation ...
- Published
- 2018
9. New findings on seed ecology of Ribes sardoum: can it provide a new opportunity to prevent the extinction of a threatened plant species?
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Giuseppe Fenu, Gianluigi Bacchetta, and Marco Porceddu
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0106 biological sciences ,education.field_of_study ,Ecology ,Population ,food and beverages ,Plant Science ,Stratification (vegetation) ,Biology ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Critically endangered ,Ribes sardoum ,Germination ,Threatened species ,IUCN Red List ,Habitats Directive ,education ,Ecology, Evolution, Behavior and Systematics ,010606 plant biology & botany - Abstract
Ribes sardoum, the most threatened endemic plant of Sardinia, is included in the Habitats Directive (92/43/EEC) and it was considered Critically Endangered in the global IUCN Red Lists. This species has been reported to have an extremely low fertility, scarce fruit production, low seed viability and a general inability to reproduce sexually. Fruits were collected for the first time from the remnant population, and the requirements for seed germination were investigated in the laboratory. Seeds were incubated at different temperatures (10, 15, and 20°C) and, in addition, they were exposed to a warm stratification (W) or a move-along treatment characterized by three cold temperature regimes (CCC). Seeds were also sown on the surface of 1% agar water with 250 mg·L−1 of GA3. At maturity, seeds have a linear underdeveloped embryo. Germination percentage between 35% and 65% were detected in the control and W groups. A low germination percentage occurred after CCC and during GA3 treatment. W treatment speeds up ...
- Published
- 2017
10. Ecological response to human trampling and conservation status ofHelianthemum caput-felis(Cistaceae) at the eastern periphery of its range
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Donatella Cogoni, Giuseppe Fenu, Gianluigi Bacchetta, and Elena Sulis
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Mediterranean coastal plant ,education.field_of_study ,biology ,Ecology ,Range (biology) ,Felis ,Population ,habitat directive ,border plant populations ,Cistaceae ,conservation status ,IUCN assessment ,plant density and size ,reproductive traits ,Sardinia ,threatened plant population ,plant science ,Plant Science ,biology.organism_classification ,Helianthemum ,Habitat ,Conservation status ,Trampling ,education - Abstract
Border and isolated plant populations represent an interesting target for ecological and conservation issues. We analysed the ecological constraints and the conservation status of the eastern population of Helianthemum caput-felis Boiss. (Cistaceae), located in Sardinia. The distribution of H. caput-felis was verified via field surveys; ecological data, morphological and reproductive traits, were recorded in 40 permanent plots randomly established; the human trampling effects on plant density, plant size and plant performance were analysed. Plant density was higher in bedrock and lowland areas, in garrigue and maquis habitats; however, the differences among plants growing in different ecological conditions were not statistically significant; only human trampling intensity significantly affected plant density and lowest values were observed in areas with intense trampling pressure. All ecological variables analysed had a statistically significant effect on plant size and on the number of fruits per...
- Published
- 2015
11. The Aichi Biodiversity Target 12 at regional level: an achievable goal?
- Author
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Elena Sulis, Mauro Fois, Gianluigi Bacchetta, Rosangela Picciau, Valentina Murru, Anna Nebot, Alba Cuena Lombrana, Maria Silvia Pinna, Giuseppe Fenu, Marco Porceddu, Martino Orru, Andrea Santo, and Donatella Cogoni
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policy species ,Strategic planning ,Global and Planetary Change ,threatened species ,Ecology ,business.industry ,Environmental resource management ,Biodiversity ,plant conservation ,Aichi biodiversity targets ,conservation planning ,regional responsibility criterion ,Sardinia ,nature and landscape conservation ,ecology ,global and planetary change ,Regional Red List ,Conservation-dependent species ,Ex situ conservation ,Geography ,Environmental protection ,Threatened species ,IUCN Red List ,Conservation status ,business ,Nature and Landscape Conservation - Abstract
The Aichi Biodiversity Target 12 aims to prevent the extinction risk of known threatened species and to improve their conservation status by 2020. We present the integrated strategy implemented in the last 10 years for the keystone plant species of Sardinia (Italy, W. Mediterranean Basin), which includes the following activities: conservation status assessment (following the IUCN protocol), ex situ conservation, in situ monitoring and active protection measures. To date, an average of 51.8% of keystone plant species have been subjected to the latter first three activities while, due to the higher costs, only few active conservation measures have been carried out. Considering the activities realised since 2004, we have also predicted the conservation effectiveness towards 2020 and have elaborated an index to evaluate it. Halfway through the strategic plan, we argue that more efforts are needed to guarantee the effective conservation of all threatened plants in Sardinia.
- Published
- 2015
12. Threatened Sardinian vascular flora: A synthesis of 10 years of monitoring activities
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Gianluigi Bacchetta, Maria Silvia Pinna, Giuseppe Fenu, and Donatella Cogoni
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conservation biology ,Flora ,In situ conservation ,Ecology ,habitat directive ,Endangered species ,Introduced species ,Forestry ,Plant Science ,behavior and systematics ,Biology ,regional responsibility criterion ,Habitat ,evolution ,Threatened species ,Mediterranean flora ,endemic ,Conservation biology ,peripheral and isolated plant population ,ecology ,plant science ,Endemism ,Ecology, Evolution, Behavior and Systematics - Abstract
The in situ conservation activities carried out in the last 10 years on endemic and threatened Sardinian vascular flora were analysed. Monitored species were selected following the policy species (listed in the Habitat Directive) and following the regional responsibility criterion. A monitoring scheme, with three levels of intensity, was applied and economic costs of the monitoring activities were analysed. In the 10-year long field work, 49 taxa corresponding to 50% of policy species and to 22.5% of the Sardinian endemics were monitored. The Sulcitano-Iglesiente sector showed the highest number of monitored taxa (20), whereas the Gennargenteo sector showed the highest number of populations monitored (32). A variation of the relative importance of the three levels of monitoring has been detected and most of the protocols showed a high level of intensity and complexity (90%). Plant-monitoring programmes have been considerably intensified over time with an increase in the total costs; the most important cos...
- Published
- 2015
13. Using endemic-plant distribution, geology and geomorphology in biogeography: the case of Sardinia (Mediterranean Basin)
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Eva M. Cañadas, Giuseppe Fenu, Gianluigi Bacchetta, and Mauro Fois
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Mediterranean climate ,Vascular plant ,Flora ,biology ,Ecology ,Biogeography ,Plant Science ,biology.organism_classification ,Mediterranean Basin ,Field (geography) ,Herbarium ,Taxon ,conservation ,continental island ,endemic plant richness ,geology ,geomorphology ,Mediterranean vascular flora ,Ecology, Evolution, Behavior and Systematics ,Geology - Abstract
The importance of robust systems for classifying biogeographical patterns has been emphasized for its usefulness in designing conservation strategies. For such purposes, the distribution patterns of the endemic flora have often been used. Several studies have identified phytogeographical units within Sardinia (western Mediterranean); however, the main part of the island remains unstudied. Thus, the aim of this study is to lay out a comprehensive biogeographical scheme for Sardinia based on endemic vascular plant distributions, together with geological and geomorphological units. We georeferenced, in a 1-km2 grid cell, the presence of 290 vascular endemic taxa from the literature, herbarium specimens and field investigators’ research. Sardinia was subdivided into 31 homogeneous units through the integration of geological and geomorphological maps and, subsequently, a presence–absence matrix of endemic taxa in each unit was built. Hierarchical cluster analysis was performed to define two levels of biogeographical units (i.e. sectors and subsectors). For each unit the exclusive and differential endemic taxa were identified. For sectors, indicator species were explored by the Indicator Value (Ind Val) analysis and relationships were analysed by quantitative interaction web. A total of six sectors and 22 subsectors were identified. The highest endemic plant richness was found in the Campidanese-Turritano, Sulcitano-Iglesiente and Supramontano sectors, and in the Gennargenteo, Barbaricino, Iglesiente and Sulcitano subsectors. All sectors were characterized by the presence of exclusive, differential and indicator taxa. The interaction analysis showed the highest uniqueness in endemic flora in the Supramontano and Sulcitano-Iglesiente sectors, which hosted a high number of exclusive endemic species. Mostly mountainous sectors/subsectors had higher endemic-species richness compared with lowland ones. The study showed the relevance of geology and geomorphology, together with accurate data on endemic distribution, to define consistent phytogeographical units. Furthermore, the biogeographical scheme presented here helps to define area-based conservation strategies in Sardinia.
- Published
- 2014
14. Arundo micrantha, a new reed species for Italy, threatened in the freshwater habitat by the congeneric invasiveA. donax
- Author
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F Mascia, R Angius, Gianluigi Bacchetta, and Giuseppe Fenu
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biology ,Ecology ,Endangered species ,Arundo donax ,Context (language use) ,Plant Science ,biology.organism_classification ,Arundo ,Mediterranean Basin ,Invasive species ,Habitat ,Threatened species ,Botany ,Ecology, Evolution, Behavior and Systematics - Abstract
Arundo micrantha Lam., a reed species from southern Mediterranean area, has found in Sardinia. Its presence represents the first record for Italy and the third one for western Europe. Investigations on distribution and ecology of the Sardinian population have been carried out, with special focusing on synecology of the species. A. micrantha has found in 40 localities mainly distributed along temporary streams and permanent rivers in the central and southern part of the island. Most of Sardinian populations occurs on alluvial soils in Thermomediterranean bioclimatic context. The autonomy of Sardinian phytocoenoses was characterized with the definition of exclusive floristic taxa, biological and chorological elements, and syndinamic relationships with other assemblages. Comparing the community with other reed beds from the Mediterranean basin, a marked floristic differentiation arose between the phytocoenoses characterized by autochthonous Arundo species and those dominated by the invasive Arundo donax. Fin...
- Published
- 2013
15. Effects of timing of emergence and microhabitat conditions on the seedling performance of a coastal Mediterranean plant
- Author
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Giuseppe Fenu, Gianluigi Bacchetta, and Donatella Cogoni
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Mediterranean climate ,Ecology ,Habitat ,biology ,Seedling ,Ecosystem ,Annual plant ,biology.organism_classification ,Endemism ,Arid ,Ecology, Evolution, Behavior and Systematics ,Sand dune stabilization - Abstract
Seedling emergence is a critical stage in the life cycle of annual plants, especially in arid and semiarid Mediterranean ecosystems characterized by high environmental unpredictability. We examined whether the timing of seedling emergence is related to plant survival and fitness for Anchusa littorea (Boraginaceae), an annual plant growing in a Mediterranean coastal sand dune ecosystem of southwest Sardinia (Italy). Seedling emergence, survival, and fruit set was monitored during 4 y (2008–2011) in 25 plots distributed in 2 contrasting microhabitats. Emergence concentrated in late winter (February–March), with few plants emerging thereafter. Early emergence time increased plant life length and fitness. Microhabitat conditions did not influence seedling emergence, although higher survival and fitness occurred in more favourable habitats. Our study enabled us to characterize the patterns of recruitment in A. littorea by analyzing the most critical stages in its life cycle.
- Published
- 2013
16. From seed to seedling: A critical transitional stage for the Mediterranean psammophilous speciesDianthus morisianus(Caryophyllaceae)
- Author
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Gianluigi Bacchetta, Donatella Cogoni, Giuseppe Fenu, and Efisio Mattana
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biology ,Soil seed bank ,Seed dispersal ,Dianthus ,Caryophyllaceae ,Plant Science ,biology.organism_classification ,Horticulture ,Stratification (seeds) ,Germination ,Seedling ,Botany ,Biological dispersal ,Ecology, Evolution, Behavior and Systematics - Abstract
Seed germination, seedling emergence and seed persistence in the soil were investigated for Dianthus morisianus (Caryophyllaceae), a psammophilous endemic species of Sardinia. Stored and freshly collected seeds were incubated in a range of constant temperatures (5–25°C) and an alternating temperature regime (25/10°C). The effect of seed burial depth on seedling emergence was investigated under controlled environmental conditions. Seed persistence in the soil was verified by in situ experimental seed burials. Seeds of this species were non-dormant, and all seed lots germinated both in the light and darkness, mainly at low temperatures (≤20°C), with a maximum at 15°C (≥95%). Optimal seedling emergence was obtained when seeds were buried at a depth of 1–2 cm, and a declining emergence with increasing depth was observed. D. morisianus was also unable to form a persistent soil seed bank. The fate of the seeds that, after dispersal, do not emerge from the soil in the spring is, therefore, presumably to...
- Published
- 2012
17. Seed Production andin situGermination ofLamyropsis microcephala(Asteraceae), a Threatened Mediterranean Mountain Species
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Efisio Mattana, Gianluigi Bacchetta, and Giuseppe Fenu
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0106 biological sciences ,Mediterranean climate ,Global and Planetary Change ,biology ,Lamyropsis microcephala ,Population size ,media_common.quotation_subject ,Endangered species ,04 agricultural and veterinary sciences ,Asteraceae ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Horticulture ,Germination ,Threatened species ,Botany ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Reproduction ,Ecology, Evolution, Behavior and Systematics ,Earth-Surface Processes ,media_common - Abstract
Seed reproduction is considered a critical bottleneck of the plant life cycle, constraining population growth, especially in the Mediterranean area. In this study, we investigated seed reproduction of Lamyropsis microcephala (Asteraceae), a threatened species occurring only in the Gennargentu massif (CE Sardinia, Italy). Seed output was quantified in two of the four localities where the species occurs, which differed in population size. Germination of seeds from all the four localities was assessed, both in the field and under controlled conditions, and the annual trend of soil temperature recorded by data-loggers. Plants had ca. 60 cypselas (i.e. the fruits of Asteraceae) per capitulum in the larger Rio Aratu and ca. 30 in the smaller Pisargiu locality, with only ca. 1.7 and 0.3 germinating cypselas per capitulum, respectively. Under controlled conditions, seeds of the two large localities (Bau ‘e Laccos and Rio Aratu) germinated above 80%, while those of the two small ones (Bruncu Spina and Pis...
- Published
- 2012
18. Adaptation to habitat inAquilegiaspecies endemic to Sardinia (Italy): Seed dispersal, germination and persistence in the soil
- Author
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Matthew I. Daws, Gianluigi Bacchetta, Efisio Mattana, and Giuseppe Fenu
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education.field_of_study ,geography ,geography.geographical_feature_category ,Phenology ,Seed dispersal ,Aquilegia ,Population ,Sowing ,Aquilegia barbaricina ,Plant Science ,Biology ,biology.organism_classification ,Germination ,Botany ,education ,Ecology, Evolution, Behavior and Systematics ,Riparian zone - Abstract
The autecology of the Sardinian endemics Aquilegia barbaricina Arrigoni et Nardi and A. nugorensis Arrigoni et Nardi were investigated. Peaks of anthesis and seed dispersal were recorded for five populations occurring in two distinct habitats, one riparian and one rupicolous. Germination tests were carried out on seed lots belonging to each population by sowing seeds at 10, 15, 20, 25 and 25/15°C. In addition, seeds were incubated for 2 months at either 25°C (summer), 5°C (winter) or 25°C for 2 months plus 2 months at 5°C (summer followed by winter–SW), and then moved to the germination temperatures. Embryo measurements were taken during pre-treatments and germination. Experimental seed burials were carried out for two populations of each species. Both species dispersed in summer. The population of A. nugorensis occurring on rocky outcrops differed in phenology from both the other A. nugorensis population from riparian vegetation and from A. barbaricina. Both species showed morphophysiological se...
- Published
- 2012
19. Regional responsibility for plant conservation: The 2010 GSPC Target 8 in Sardinia
- Author
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Giuseppe Fenu, Gianluigi Bacchetta, and Efisio Mattana
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Flora ,Geography ,Taxon ,Agroforestry ,Environmental protection ,Germplasm Bank ,Threatened species ,IUCN Red List ,Plant Science ,Endemism ,Ex situ conservation ,Ecology, Evolution, Behavior and Systematics - Abstract
The collections stored at the Sardinian Germplasm Bank (BG-SAR) were analysed to verify if setting conservation priorities on the exclusive endemic flora of Sardinia (Italy) would make it possible to reach the 2010 GSPC Target 8. By 2010, 39.9% of the exclusive-endemics of Sardinia, 43.1% of the BGCI European threatened species and 65.0% of the taxa listed in Annex II of DIR 92/43/EEC present on the island had been stored in BG-SAR. Of the stored plants, 40% of those listed in the DIR 92/43/EEC, and only 25.69% of the BGCI threatened plants are represented by an adequate number of populations. For a few of the stored threatened plants (ca. 36%), and for 60% of the DIR 92/43/EEC ones, at least one seedlot with more than 5000 seeds is available. These data indicate that focusing on exclusive endemics gave a substantial, although not decisive, contribution towards the achievement of the 2010 GSPC Target 8 in Sardinia, and that more efforts are needed to guarantee the effective long-term conservation...
- Published
- 2012
20. Relationships between coastal sand dune properties and plant community distribution: The case of Is Arenas (Sardinia)
- Author
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Donatella Cogoni, Gianluigi Bacchetta, C Ferrara, Maria Silvia Pinna, and Giuseppe Fenu
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Abiotic component ,Biotic component ,Ecology ,business.industry ,Distribution (economics) ,Plant community ,Plant Science ,Sand dune stabilization ,Environmental science ,Mediterranean area ,Ecosystem ,Sedimentology ,business ,Ecology, Evolution, Behavior and Systematics - Abstract
Coastal dune environments are selective ecosystems characterized by a close interaction between abiotic and biotic factors in a dynamic balance. The present study focused on the psammophilous geosigmetum, the most affected by the interactions between physical processes and biological and anthropic processes. The main purpose was to study the relationships between the abiotic properties of the dune and the presence of the various plant communities, combining morpho-sedimentological, geopedological, and geobotanical data. The study was carried out on the well-preserved dune system of Is Arenas (CW Sardinia) which is one of the most important in the Mediterranean area. The analyses revealed differences at the morphodynamic, sedimentological, and geopedological levels. The micro-topography of the dunes affects the values of the main abiotic variables, and determines the presence of various microhabitats of great heterogeneity. This work shows that the data on the geomorphological dynamics and the chemical–physical processes, correlated with the geobotanical analyses, might make it possible to identify the ecosystemic processes, and thereby plan adequate management and conservation strategies for this coastal dune system.
- Published
- 2012
21. Ecological remarks onAstragalus maritimusandA. verrucosus, two threatened exclusive endemic species of Sardinia
- Author
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C Pontecorvo, Giuseppe Fenu, Efisio Mattana, and Gianluigi Bacchetta
- Subjects
Astragalus ,biology ,Germination ,Ecology ,fungi ,Threatened species ,IUCN Red List ,Conservation status ,Dormancy ,Plant Science ,biology.organism_classification ,Endemism - Abstract
Astragalus maritimus Moris and A. verrucosus Moris are two endemic threatened species exclusive of South West Sardinia. In this study the populations of both species were characterized and their seed germination investigated. The in situ results allowed reviewing their conservation status in compliance with the IUCN criteria, confirming the CR category by new subcriteria for both species. The germination study allowed identifying as well their dormancy breaking requirements.
- Published
- 2011
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