Data/hora: 02/06/2024 01:06:47

Biblioteca(s): | Embrapa Amazônia Oriental.
Tipo da produção científica: | Artigo em Periódico Indexado
Circulação/Nível: | A - 1
Data corrente: | 01/06/2016
Data da última atualização: | 25/05/2022
Autoria: | SANDE, M. T. van der; ARETS, E. J. M. M.; PEÑA-CLAROS, M.; AVILA, A. L. de; ROOPSIND, A.; MAZZEI, L.; ASCARRUNZ, N.; FINEGAN, B.; ALARCÓN, A.; CÁCERES-SIANI, A.; LICONA, J. C.; RUSCHEL, A.; TOLEDO, M.; POORTER, L.
Afiliação: | Masha T . van der Sande, Instituto Boliviano de Investigación Forestal; Eric J. M. M. Arets, Wageningen University and Research Centre; Marielos Peña -Claros, Forest Ecology and Forest Management Group, Wageningen University.; Angela Luciana de Avila, Faculty of Environment and Natural Resources, Chair of Silviculture, University of Freiburg; Anand Roopsind, Department of Biology, University of Florida; LUCAS JOSE MAZZEI DE FREITAS, CPATU; Nataly Ascarrunz, Instituto Boliviano de Investigación Forestal; Bryan Finegan, Production and Conservation in Forests Programme CATIE; Alfredo Alarcón, Instituto Boliviano de Investigación Forestal; Asmani Cáceres-Siani, Rurrenabaque, Beni.; Juan Carlos Licona, Instituto Boliviano de Investigación Forestal; ADEMIR ROBERTO RUSCHEL, CPATU; Marisol Toledo, Instituto Boliviano de Investigación Forestal; Lourens Poorter, Forest Ecology and Forest Management Group, Wageningen University.
Título: | Old-growth Neotropical forests are shifting in species and trait composition.
Ano de publicação: | 2016
Fonte/Imprenta: | Ecological Monographs, v. 86, n. 2, p. 228-243, 2016.
Idioma: | Inglês
Conteúdo: | Tropical forests have long been thought to be in stable state, but recent insights indicate that global change is leading to shifts in forest dynamics and species composition. These shifts may be driven by environmental changes such as increased resource availability, increased drought stress, and/or recovery from past disturbances. The relative importance of these drivers can be inferred from analyzing changes in trait values of tree communities. Here, we evaluate a decade of change in species and trait composition across five old-growth Neotropical forests in Bolivia, Brazil, Guyana, and Costa Rica that cover large gradients in rainfall and soil fertility. To identify the drivers of compositional change, we used data from 29 permanent sample plots and measurements of 15 leaf, stem, and whole-plant traits that are important for plant performance and should respond to global change drivers. We found that forests differ strongly in their community-mean trait values, resulting from differences in soil fertility and annual rainfall seasonality. The abundance of deciduous species with high specific leaf area increases from wet to dry forests. The community-mean wood density is high in the driest forests to protect xylem vessels against drought cavitation, and is high in nutrient-poor forests to increase wood longevity and enhance nutrient residence time in the plant. Interestingly, the species composition changed over time in three of the forests, and the community-mean wood density increased and the specific leaf area decreased in all forests, indicating that these forests are changing toward later successional stages dominated by slow-growing, shade-tolerant species. We did not see changes in other traits that could reflect responses to increased drought stress, such as increased drought deciduousness or decreased maximum adult size, or that could reflect increased resource availability (CO2, rainfall, or nitrogen). Changes in species and trait composition in these forests are therefore most likely caused by recovery from past disturbances. These compositional changes may also lead to shifts in ecosystem processes, such as a lower carbon sequestration and ?slower? forest dynamics.
Thesagro: | Biodiversidade; Fertilidade do Solo; Floresta; Floresta Tropical.
Thesaurus Nal: | soil fertility.
Categoria do assunto: | K Ciência Florestal e Produtos de Origem Vegetal
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (52224-1) - UPC - AP - DD -  -  -  - DIS