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3 results on '"Queiroz, Túlio Barroso"'

1. A New Method to Calibrate Cardinal Temperatures for Eucalyptus Plantation †.

Author

Queiroz, Túlio Barroso, Montes, Cristian Rodrigo, and Campoe, Otávio Camargo

Subjects
EUCALYPTUS, TREE growth, EXTREME value theory, TREE farms, PLANTATIONS, TEMPERATURE
Abstract

Developing a good understanding of the interactions between forest plantation growth and climate is essential for predicting the impact of climate change on terrestrial ecosystems and for assessing the adaptation and vulnerability of tree species. One such interaction, the response in growth rate of a forest stand to changes in temperature, may be described mathematically. Some models that run on monthly time steps assume a yearly optimum, minimum, and maximum temperature for simplicity, which may not represent well to actual forest growth. Here, we developed a finer-resolution methodology that encompasses monthly growth rates and temperature limits to calibrate the parameters for an envelope curve in Eucalyptus plantations in South America. Several polynomial curves were tested to determine temperature patterns, and their yearly tree growth patterns demonstrated that responses to temperature differed by as much as 10 °C among seasons. The best curve was a second-degree polynomial curve, whose extreme values indicated the optimum temperature and whose real roots limited the minimum and maximum temperatures for growth. This polynomial was fitted every month to describe yearly changes in optimum, maximum, and minimum temperatures. When fitted to annual data, it determined 7 °C, 19 °C, and 31 °C as the minimum, optimum, and maximum temperatures for tree growth, respectively. The monthly model predictions indicated that the minimum, optimum, and maximum temperatures lay between 8 °C and 16 °C, 18 °C and 22 °C, and 27 °C and 30 °C, respectively. These monthly temperature ranges can improve the estimation of productivity in process-based models. Our results contribute to the understanding of tree growth dynamics and its relationship to changes in temperature. Accurate ranges of temperature can be used to improve productivity predictions in new expanding planting regions with no previous information or to suggest a regionalization for potential species. [ABSTRACT FROM AUTHOR]

Published
2023
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2. Amplitude of optimal temperatures for Eucalyptus clones growth in Brazil and Uruguay

Author

Queiroz, Túlio Barroso [UNESP], Universidade Estadual Paulista (Unesp), Campoe, Otávio Camargo, and Guerrini, Iraê Amaral

Subjects
Tree growth, Climate changes, Temperature range, Fisiologia vegetal, Ecophysiology, Eucalipto, Modeling, Ecofisiologia, Temperatura, Modelo baseado em processos
Abstract

Submitted by TÚLIO BARROSO QUEIROZ (tulio-bq@hotmail.com) on 2020-07-28T11:32:58Z No. of bitstreams: 1 Thesis_tulio_queiroz _forest_science_UNESP_july_final.pdf: 2972942 bytes, checksum: a2e767ec1224a22ff76bcef962120ede (MD5) Approved for entry into archive by Ana Lucia de Grava Kempinas (algkempinas@fca.unesp.br) on 2020-07-28T14:53:59Z (GMT) No. of bitstreams: 1 queiroz_tb_dr_botfca_par.pdf: 745269 bytes, checksum: 3a16746cb8268d82c4612db4d1e66584 (MD5) Made available in DSpace on 2020-07-28T14:53:59Z (GMT). No. of bitstreams: 1 queiroz_tb_dr_botfca_par.pdf: 745269 bytes, checksum: 3a16746cb8268d82c4612db4d1e66584 (MD5) Previous issue date: 2020-06-01 Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) A diversidade de climas na América do Sul, associada a grande adaptabilidade do gênero Eucalyptus tem estimulado a busca por materiais genéticos superiores e de alta produtividade. O melhoramento genético evoluiu no desenvolvimento de genótipos em sítios específicos, mas ainda apresenta carência de informações quanto à interação entre o comportamento dos genótipos em condições climáticas e edáficas contrastantes. O projeto TECHS (Tolerância de Eucalyptus Clonais aos Estresses Hídrico Térmico e Biótico) do IPEF (Instituto de Pesquisa e Estudos Florestais) conta com materiais genéticos clonais distribuídos em uma amplitude de temperatura média anual de 16 oC a 30 oC e disponibilidade hídrica anual de 800 mm a 1800 mm. Este trabalho objetivou avaliar o efeito da variabilidade inter e intra-anual do clima sobre a produtividade de clones comerciais de eucalipto em oito sítios localizados em: Bocaiúva (MG/Brasil), Conchillas (Uruguai), Eunápolis (BA/Brasil), Mogi Guaçu (SP/Brasil), Otacílio Costa (SC/Brasil), Paysandu (Uruguai), Telêmaco Borba (PR/Brasil) e Urbano Santos (MA/Brasil). O diâmetro na altura do peito (DAP) de genotipos de eucalipto foram monitorados em alta resolução temporal (quinzenal e/ou mensal) durante 6 anos (2012 – 2018). Além disso, estações meteorológicas coletaram informações climáticas a cada 1 h em cada sítio experimental. Nós desenvolvemos um novo método de calibração que descreve a faixa de temperatura mensal para o crescimento das árvores através da otimização dos parâmetros. Em seguida, indicamos a faixa de temperatura necessária para o crescimento dos 7 genótipos mais plantados na América do Sul. A equação polinomial de 2º grau foi recomendada para explicar os limites de temperatura para o crescimento das árvores. Por fim, os resultados deste estudo poderão ser utilizados nos programas de melhoramento genético, aprimoramento de modelos de prognose de crescimento e no zoneamento dos genótipos de eucalipto. The diversity of climates in South America which is associated with the great adaptability of the genus Eucalyptus, has stimulated the search for superior and high productivity genetic materials. Genetic improvement has evolved in the development of genotypes at specific sites, but it still shows information insufficient the interaction between genotype behavior in contrasting climatic and edaphic conditions. The TECHS project (Cooperative Program on Clonal Eucalyptus Tolerance to the Hydrous and Thermal Stresses) from IPEF (Forestry Science and Research Institute) has clonal genetic materials distributed over an average annual temperature range from 16 oC to 30 oC and annual water availability from 800 mm to 1800 mm. This study aimed to evaluate the effect of inter and intra-annual climate variability on the productivity of Eucalyptus commercial clones in eight sites located in: Bocaiúva (MG / Brazil), Conchillas (Uruguay), Eunápolis (BA / Brazil), Mogi Guaçu (SP / Brazil), Otacilio Costa (SC / Brazil), Paysandu (Uruguay), Telemaco Borba (PR / Brazil) and Urbano Santos (MA / Brazil). Diameter at breast height (DBH) of Eucalyptus genotypes were monitored with high temporal resolution (biweekly and/or monthly) for 6 years (2012 - 2018). In addition, meteorological stations collected weather information every 1 h at each experimental site. We developed a new calibration method that describes the monthly temperature range for tree growth by parameter optimization. After that, we indicate the temperature range required for the growth of the 7 most planted genotypes in South America. The 2nd degree polynomial equation was recommended to explain temperature threshold for tree growth. Finally, the results of this study may be used in breeding programs, enhancement of growth prognosis models and zoning of Eucalyptus genotypes. CAPES-001 PDSE-88881.189488/2018-01

Published
2020

3. Temperature thresholds for Eucalyptus genotypes growth across tropical and subtropical ranges in South America.

Author

Queiroz, Túlio Barroso, Campoe, Otávio Camargo, Montes, Cristian Rodrigo, Alvares, Clayton Alcarde, Cuartas, Mauricio Zapata, and Guerrini, Iraê Amaral

Subjects
GENOTYPES, FOREST productivity, PLANT metabolism, EUCALYPTUS, ATMOSPHERIC temperature, TREE growth, TREE height
Abstract

• Temperature growth thresholds for seven Eucalyptus genotypes are presented. • Eucalyptus growth occurred only between 6 °C and 31 °C. • Maximum tree growth can be achieved with temperature range between 18 °C and 22 °C. • Acclimation patterns of trees suggest improvement in process-based models. Temperature is a crucial factor influencing the growth of forest plantations, and a key variable used in process-based models of forest productivity. In the present study, we evaluated the relationship between temperature and growth of seven Eucalyptus genotypes in eight sites across a 3500 km latitude gradient in South America. From 18 months after planting until 72 months of age, climatic data and tree diameter increments at breast height (1.3 m above ground level) were monitored in each site intensively (every 15-30 days). The optimum temperature to growth varied among genotypes, ranging from 18 to 22 °C. The minimum annual temperature required for growth was 6 °C, while the maximum was 31 °C. The results at a monthly scale indicate that the minimum temperature to growth is between 7 °C and 23 °C, while the monthly maximum temperature is between 15 °C and 31 °C. When we used annual temperature or large temporal scales, we potentially minimize the effects of climate on plant metabolism; this should be taken into account in process based-models. The study results enhance our understanding of the influence of air temperature on tree growth dynamics. The Eucalyptus genotypes most planted in Brazil and Uruguay have specific thermal demands for growth maintenance and different optimal temperatures for maximum growth. Understanding variation in growth under different climatic conditions would facilitate accurate prediction of forest productivity based on thermal requirements. In addition, the data presented here could facilitate tree breeding by enhancing phenotypic analyses based on ecophysiological factors during the selection process. [ABSTRACT FROM AUTHOR]

Published
2020
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