期刊
BIOSCIENCE
卷 65, 期 9, 页码 849-861出版社
OXFORD UNIV PRESS
DOI: 10.1093/biosci/biv108
关键词
secondary succession; forest regeneration; alternative pathways; land-use history; stochastic processes
类别
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
- Fundacao de Amparo a Pesquisa do Estado do Amazonas (FAPEAM)
- US National Science Foundation [DEB-0639114, DEB-1147434]
- Instituto Nacional de Ciencia e Tecnologia dos Servicos Ambientais da Amazonia (INCT/Servamb)
- Biological Dynamics of Forest Fragments Project (BDFFP)
- Division Of Environmental Biology
- Direct For Biological Sciences [1147434] Funding Source: National Science Foundation
Land-use practices can dramatically shift the trajectories of rain forest recovery. In a 25-year study, Amazon rain forest regenerated following deforestation as long as seed availability and seedling recruitment were not interrupted. In contrast, rain forest converted to cattle pastures via cutting and burning prior to abandonment diverted succession, leading to highly simplified stands dominated by a single genus. Annual fires eliminated seedlings, saplings, coppice, and seeds in the soil, except for several Vismia species. Once established, Vismia regenerated by continual resprouting and resisted the establishment of other rain forest species, especially the normal suite of pioneers. Through time, succession both in abandoned clearcuts and pastures increased in stem density and biomass; however, species accumulation and ecosystem services were limited in pastures when compared with those in abandoned clearcuts. Therefore, prescribed burning to maintain pastureland leaves a legacy that is not readily extinguished, whereas abandoning clearcuts engenders an accelerated rain forest regeneration.
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