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Assessing the growth and climate sensitivity of secondary forests in highly deforested Amazonian landscapes.
Elias, Fernando; Ferreira, Joice; Lennox, Gareth D; Berenguer, Erika; Ferreira, Socorro; Schwartz, Gustavo; Melo, Lia de Oliveira; Reis Júnior, Denilson N; Nascimento, Rodrigo O; Ferreira, Fabrício Nascimento; Espirito-Santo, Fernando; Smith, Charlotte C; Barlow, Jos.
Afiliação
  • Elias F; Programa de Pós-Graduação em Ecologia, Instituto de Ciências Biológicas, Universidade Federal do Pará/Embrapa Amazônia Oriental, Belém, Pará, 66075-110, Brazil.
  • Ferreira J; Programa de Pós-Graduação em Ecologia, Instituto de Ciências Biológicas, Universidade Federal do Pará/Embrapa Amazônia Oriental, Belém, Pará, 66075-110, Brazil.
  • Lennox GD; Embrapa Amazônia Oriental, Belém, Pará, 66095-903, Brazil.
  • Berenguer E; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK.
  • Ferreira S; Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK.
  • Schwartz G; Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, OX1 3QY, UK.
  • Melo LO; Embrapa Amazônia Oriental, Belém, Pará, 66095-903, Brazil.
  • Reis Júnior DN; Embrapa Amazônia Oriental, Belém, Pará, 66095-903, Brazil.
  • Nascimento RO; Universidade Federal do Oeste do Pará, Santarém, Pará, 68040-255, Brazil.
  • Ferreira FN; Departamento de Engenharia Florestal, Universidade Federal Rural da Amazônia, Belém, Pará, 66077-830, Brazil.
  • Espirito-Santo F; Programa de Pós-Graduação em Ciências Ambientais, Instituto de Geociências, Universidade Federal do Pará, Belém, Pará, 66075-110, Brazil.
  • Smith CC; Embrapa Amazônia Oriental, Belém, Pará, 66095-903, Brazil.
  • Barlow J; Centre for Landscape and Climate Research, Leicester Institute of Space and Earth Observation, School of Geography, Geology and Environment, University of Leicester, University Road, Leicester, LE1 7RH, UK.
Ecology ; 101(3): e02954, 2020 03.
Article em En | MEDLINE | ID: mdl-31840235
Tropical forests hold 30% of Earth's terrestrial carbon and at least 60% of its terrestrial biodiversity, but forest loss and degradation are jeopardizing these ecosystems. Although the regrowth of secondary forests has the potential to offset some of the losses of carbon and biodiversity, it remains unclear if secondary regeneration will be affected by climate changes such as higher temperatures and more frequent extreme droughts. We used a data set of 10 repeated forest inventories spanning two decades (1999-2017) to investigate carbon and tree species recovery and how climate and landscape context influence carbon dynamics in an older secondary forest located in one of the oldest post-Columbian agricultural frontiers in the Brazilian Amazon. Carbon accumulation averaged 1.08 Mg·ha-1 ·yr-1 , and species richness was effectively constant over the studied period. Moreover, we provide evidence that secondary forests are vulnerable to drought stress: Carbon balance and growth rates were lower in drier periods. This contrasts with drought responses in primary forests, where changes in carbon dynamics are driven by increased stem mortality. These results highlight an important climate change-vegetation feedback, whereby the increasing dry-season lengths being observed across parts of Amazonia may reduce the effectiveness of secondary forests in sequestering carbon and mitigating climate change. In addition, the current rate of forest regrowth in this region was low compared with previous pan-tropical and Amazonian assessments-our secondary forests reached just 41.1% of the average carbon and 56% of the tree diversity in the nearest primary forests-suggesting that these areas are unlikely to return to their original levels on politically meaningful time scales.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Florestas / Ecossistema Tipo de estudo: Diagnostic_studies País/Região como assunto: America do sul / Brasil Idioma: En Revista: Ecology Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Florestas / Ecossistema Tipo de estudo: Diagnostic_studies País/Região como assunto: America do sul / Brasil Idioma: En Revista: Ecology Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Estados Unidos