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Persistent effects of fragmentation on tropical rainforest canopy structure after 20 yr of isolation.
Almeida, Danilo R A; Stark, Scott C; Schietti, Juliana; Camargo, Jose L C; Amazonas, Nino T; Gorgens, Eric B; Rosa, Diogo M; Smith, Marielle N; Valbuena, Ruben; Saleska, Scott; Andrade, Ana; Mesquita, Rita; Laurance, Susan G; Laurance, William F; Lovejoy, Thomas E; Broadbent, Eben N; Shimabukuro, Yosio E; Parker, Geoffrey G; Lefsky, Michael; Silva, Carlos A; Brancalion, Pedro H S.
Afiliação
  • Almeida DRA; Department of Forest Sciences, "Luiz de Queiroz" College of Agriculture, University of São Paulo (USP/ESALQ), Avenida Pádua Dias, 11, Piracicaba, São Paulo, 13418-900, Brazil.
  • Stark SC; Department of Forestry, Michigan State University, East Lansing, Michigan, 48824, USA.
  • Schietti J; National Institute for Amazonian Research (INPA), Avenida André Araújo, Manaus, Amazonas, 2936, 69067-375, Brazil.
  • Camargo JLC; Biological Dynamics of Forest Fragments Project (BDFFP), National Institute for Amazonian Research (INPA) and Smithsonian Tropical Research Institute, Manaus, 69067-375, Brazil.
  • Amazonas NT; Department of Forest Sciences, "Luiz de Queiroz" College of Agriculture, University of São Paulo (USP/ESALQ), Avenida Pádua Dias, 11, Piracicaba, São Paulo, 13418-900, Brazil.
  • Gorgens EB; Department of Forestry, Federal University of Vales do Jequitinhonha e Mucuri, Campus JK, Rodovia MGT 367 - Km 583, n° 5000, Diamantina, Brazil.
  • Rosa DM; National Institute for Amazonian Research (INPA), Avenida André Araújo, Manaus, Amazonas, 2936, 69067-375, Brazil.
  • Smith MN; Department of Forestry, Michigan State University, East Lansing, Michigan, 48824, USA.
  • Valbuena R; Department of Plant Sciences, Forest Ecology and Conservation, University of Cambridge, Downing Street, Cambridge, CB2 3EA, United Kingdom.
  • Saleska S; School of Natural Sciences, Bangor University, Bangor, LL57 2UW, United Kingdom.
  • Andrade A; Department of Ecology and Evolutionary Biology, University of Arizona, 1041 E. Lowell Street, Tucson, Arizona, 85721, USA.
  • Mesquita R; Biological Dynamics of Forest Fragments Project (BDFFP), National Institute for Amazonian Research (INPA) and Smithsonian Tropical Research Institute, Manaus, 69067-375, Brazil.
  • Laurance SG; National Institute for Amazonian Research (INPA), Avenida André Araújo, Manaus, Amazonas, 2936, 69067-375, Brazil.
  • Laurance WF; Biological Dynamics of Forest Fragments Project (BDFFP), National Institute for Amazonian Research (INPA) and Smithsonian Tropical Research Institute, Manaus, 69067-375, Brazil.
  • Lovejoy TE; College of Science and Engineering, Centre for Tropical Environmental and Sustainability Science, James Cook University, Cairns, Queensland, 4878, Australia.
  • Broadbent EN; Department of Ecology and Evolutionary Biology, University of Arizona, 1041 E. Lowell Street, Tucson, Arizona, 85721, USA.
  • Shimabukuro YE; Biological Dynamics of Forest Fragments Project (BDFFP), National Institute for Amazonian Research (INPA) and Smithsonian Tropical Research Institute, Manaus, 69067-375, Brazil.
  • Parker GG; School of Forest Ecology and Conservation, Spatial Ecology and Conservation Lab, University of Florida, 303 Reed Lab, Gainesville, Florida, 32611, USA.
  • Lefsky M; National Institute for Space Research (INPE), Avenida dos Astronautas, São Jose dos Campos, São Paulo, 1758, 12201, Brazil.
  • Silva CA; Smithsonian Environmental Research Center, 647 Contee's Wharf Road, Edgewater, Maryland, 21037, USA.
  • Brancalion PHS; Department of Ecosystem Science and Sustainability, Colorado State University, Fort Collins, Colorado, 80523-1476, USA.
Ecol Appl ; 29(6): e01952, 2019 09.
Article em En | MEDLINE | ID: mdl-31206818
Assessing the persistent impacts of fragmentation on aboveground structure of tropical forests is essential to understanding the consequences of land use change for carbon storage and other ecosystem functions. We investigated the influence of edge distance and fragment size on canopy structure, aboveground woody biomass (AGB), and AGB turnover in the Biological Dynamics of Forest Fragments Project (BDFFP) in central Amazon, Brazil, after 22+ yr of fragment isolation, by combining canopy variables collected with portable canopy profiling lidar and airborne laser scanning surveys with long-term forest inventories. Forest height decreased by 30% at edges of large fragments (>10 ha) and interiors of small fragments (<3 ha). In larger fragments, canopy height was reduced up to 40 m from edges. Leaf area density profiles differed near edges: the density of understory vegetation was higher and midstory vegetation lower, consistent with canopy reorganization via increased regeneration of pioneers following post-fragmentation mortality of large trees. However, canopy openness and leaf area index remained similar to control plots throughout fragments, while canopy spatial heterogeneity was generally lower at edges. AGB stocks and fluxes were positively related to canopy height and negatively related to spatial heterogeneity. Other forest structure variables typically used to assess the ecological impacts of fragmentation (basal area, density of individuals, and density of pioneer trees) were also related to lidar-derived canopy surface variables. Canopy reorganization through the replacement of edge-sensitive species by disturbance-tolerant ones may have mitigated the biomass loss effects due to fragmentation observed in the earlier years of BDFFP. Lidar technology offered novel insights and observational scales for analysis of the ecological impacts of fragmentation on forest structure and function, specifically aboveground biomass storage.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ecossistema / Floresta Úmida País/Região como assunto: America do sul / Brasil Idioma: En Revista: Ecol Appl Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ecossistema / Floresta Úmida País/Região como assunto: America do sul / Brasil Idioma: En Revista: Ecol Appl Ano de publicação: 2019 Tipo de documento: Article País de afiliação: Brasil