Ecosystem Decay of Amazonian Forest Fragments: a 22-Year Investigation

作者: William F. Laurance , Thomas E. Lovejoy , Heraldo L. Vasconcelos , Emilio M. Bruna , Raphael K. Didham

DOI: 10.1046/J.1523-1739.2002.01025.X

关键词:

摘要: We synthesized key findings from the Biological Dynamics of Forest Fragments Project, world's largest and longest-running experimental study habitat fragmentation. Although initially designed to assess influence fragment area on Amazonian biotas, project has yielded insights that go far beyond orig- inal scope study. Results suggest edge effects play a role in dynamics, matrix major connectivity functioning, many species avoid even small ( � 100-m-wide) clearings. The fragmentation are highly eclectic, altering richness abundances, invasions, forest trophic structure communities, variety ecological ecosystem processes. Moreover, appears interact synergistically with changes such as hunting, fires, logging, collectively posing an greater threat rainforest biota. Descomposicion del Ecosistema en Fragmentos de Bosque Amazonico, Una Investigacion 22 Anos Resumen: Sintetizamos resultados clave proyecto sobre Dinamicas Biologicas bosque, el estudio fragmentacion mas largo y mayor trayectoria mundo. A pesar que inicialmente se diseno para evaluar la influencia fragmentos biotas Amazo- nas, ha proporcionado un entendimiento va alla proposito original estudio. Los sugieren los efectos borde juegan papel las dinamicas fragmentos, matriz tiene una conectividad funcionamiento fragmento muchas especies Amazonas evitan areas taladas pequenas (de hasta 100 m ancho). son al- tamente eclecticos, alterando riqueza abundancia especies, invasiones estructura trofica comunitaria variedad procesos ecologicos ecosistema. Mas aun, bosque aparentemente interactua sinergisticamente con cambios como lo caza, incendios tala, representando colectivamente gran amenaza biota lluvioso.

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