orest fragmentation impacts the seasonality of Amazonian evergreen canopie

Autor(es):Mostrar menos -

Nunes, Matheus Henrique ^[1] ; Campana Camargo, Jose Luis ^[2] ; Vincent, Gregoire ^[3] ; Calders, Kim ^[4] ; Oliveira, Rafael S. ^[5] ; Huete, Alfredo ^[6] ; de Moura, Yhasmin Mendes ^{[7, 8]} ; Nelson, Bruce ^[9] ; Smith, Marielle N. ^[10] ; Stark, Scott C. ^[10] ; Maeda, Eduardo Eiji ^{[1, 11]}

Afiliação do(s) autor(es):Mostrar menos -

^[1] Univ Helsinki, Dept Geosci & Geog, FIN-00014 Helsinki - Finland

^[2] Natl Inst Amazonian Res, Biol Dynam Forest Fragment Project, BR-69067375 Manaus, Amazonas - Brazil

^[3] Univ Montpellier, INRAE, CNRS, CIRAD, IRD, AMAP, Montpellier - France

^[4] Univ Ghent, Fac Biosci Engn, Dept Environm, CAVElab Computat & Appl Vegetat Ecol, Ghent - Belgium

^[5] Univ Estadual Campinas, Inst Biol, Dept Plant Biol, Campinas, SP - Brazil

^[6] Univ Technol Sydney, Fac Sci, Sch Life Sci, Sydney, NSW 2007 - Australia

^[7] Univ Leicester, Ctr Landscape & Climate Res, Sch Geog Geol & Environm, Leicester LE1 7RH, Leics - England

^[8] Karlsruhe Inst Technol KIT, Inst Geog & Geoecol, Kaiserstr 12, D-76131 Karlsruhe - Germany

^[9] Natl Inst Amazonian Res, Manaus, Amazonas - Brazil

^[10] Michigan State Univ, Dept Forestry, E Lansing, MI 48824 - USA

^[11] Univ Hong Kong, Fac Sci, Sch Biol Sci, Area Ecol & Biodivers, Hong Kong - Peoples R China

• Tipo de documento: Artigo Científico
• Fonte: ATURE COMMUNICATION; v. 13, n. 1 FEB 17 2022.
• Citações Web of Science: 0

Resumo

Predictions of the magnitude and timing of leaf phenology in Amazonian forests remain highly controversial. Here, we use terrestrial LiDAR surveys every two weeks spanning wet and dry seasons in Central Amazonia to show that plant phenology varies strongly across vertical strata in old-growth forests, but is sensitive to disturbances arising from forest fragmentation. In combination with continuous microclimate measurements, we find that when maximum daily temperatures reached 35 degrees C in the latter part of the dry season, the upper canopy of large trees in undisturbed forests lost plant material. In contrast, the understory greened up with increased light availability driven by the upper canopy loss, alongside increases in solar radiation, even during periods of drier soil and atmospheric conditions. However, persistently high temperatures in forest edges exacerbated the upper canopy losses of large trees throughout the dry season, whereas the understory in these light-rich environments was less dependent on the altered upper canopy structure. Our findings reveal a strong influence of edge effects on phenological controls in wet forests of Central Amazonia. Even evergreen tropical forests can have seasonal dynamics, which may be sensitive to disturbance. Here, the authors combine high-resolution remote sensing observations and microclimate data to show that forest fragmentation impacts canopy phenology dynamics in the Amazon forest. (AU)

• Processo FAPESP: 19/07773-1 - Restaurando ecossistemas neotropicais secos - seria a composição funcional das plantas a chave para o sucesso?
• Beneficiário: Rafael Silva Oliveira
• Modalidade de apoio: Auxílio à Pesquisa - Temático