Artigo

Twenty years of understorey bird extinctions from Amazonian rain forest fragments: Consistent trends and landscape-mediated dynamics

Aim: We analysed presence/absence data for understorey bird species in rain forest fragments sampled from 1979 through 2001. Here we consider extinctions between 1992, when most fragments had been isolated for at least 8 years, and 2001. Our objectives were to determine whether high extinction rates...

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Autor principal: Stouffer, Philip C.
Outros Autores: Strong, Cheryl M., Naka, Luciano Nicol?s
Grau: Artigo
Idioma: English
Publicado em: Diversity and Distributions 2020
Assuntos:
Bird
Extinction
Habitat Fragmentation
Landscape Change
Rainforest
Recolonization
Secondary Forest
Trend Analysis
Understory
Amazonas
Brasil
South America
Aves
Acesso em linha: https://repositorio.inpa.gov.br/handle/1/18491
id oai:repositorio:1-18491
recordtype dspace
spelling oai:repositorio:1-18491 Twenty years of understorey bird extinctions from Amazonian rain forest fragments: Consistent trends and landscape-mediated dynamics Stouffer, Philip C. Strong, Cheryl M. Naka, Luciano Nicol?s Bird Extinction Habitat Fragmentation Landscape Change Rainforest Recolonization Secondary Forest Trend Analysis Understory Amazonas Brasil South America Aves Aim: We analysed presence/absence data for understorey bird species in rain forest fragments sampled from 1979 through 2001. Here we consider extinctions between 1992, when most fragments had been isolated for at least 8 years, and 2001. Our objectives were to determine whether high extinction rates documented soon after isolation continued through up to 20 years after isolation, and to examine fragment size and landscape effects on extinction. Location: Biological Dynamics of Forest Fragments Project, near Manaus, Brazil. Methods: Through 1992, birds were surveyed with standardized mist net sampling in ten 1- to 100-ha fragments. We repeated the mist net protocol in 2000-01. We also added remote taping of the dawn chorus and tape playback surveys for species captured in 1991-92 but not in 2000-01. Results: Between 1992 and 2001, 37 species went extinct in at least one fragment. As expected, extinction rate decreased with increasing fragment size. Over 30% of species went extinct in 1-ha fragments, compared to about 5% in 100-ha fragments. Extinction followed a predictable pattern: most species lost from 100-ha fragments between 1992 and 2001 had already gone extinct in smaller fragments before 1992. Despite extinctions, fragments gained species between 1992 and 2001, apparently due to species moving through the developing second growth matrix. Fragments surrounded by old second growth had lower extinction rates than predicted based on fragment size alone. Main conclusions: Sequential extinctions occurred for at least 20 years. Some additional species previously lost from smaller fragments may continue to go extinct in 100-ha fragments. At the same time, species assemblages in 1- and 10-ha fragments mostly reflect second-growth dynamics by 20 years after isolation. High species loss predicted from the first few years after isolation has not occurred, almost certainly because of recolonization. © 2008 The Authors. 2020-06-15T22:01:57Z 2020-06-15T22:01:57Z 2009 Artigo https://repositorio.inpa.gov.br/handle/1/18491 10.1111/j.1472-4642.2008.00497.x en Volume 15, Número 1, Pags. 88-97 Restrito Diversity and Distributions
institution Instituto Nacional de Pesquisas da Amazônia - Repositório Institucional
collection INPA-RI
language English
topic Bird
Extinction
Habitat Fragmentation
Landscape Change
Rainforest
Recolonization
Secondary Forest
Trend Analysis
Understory
Amazonas
Brasil
South America
Aves
spellingShingle Bird
Extinction
Habitat Fragmentation
Landscape Change
Rainforest
Recolonization
Secondary Forest
Trend Analysis
Understory
Amazonas
Brasil
South America
Aves
Stouffer, Philip C.
Twenty years of understorey bird extinctions from Amazonian rain forest fragments: Consistent trends and landscape-mediated dynamics
topic_facet Bird
Extinction
Habitat Fragmentation
Landscape Change
Rainforest
Recolonization
Secondary Forest
Trend Analysis
Understory
Amazonas
Brasil
South America
Aves
description Aim: We analysed presence/absence data for understorey bird species in rain forest fragments sampled from 1979 through 2001. Here we consider extinctions between 1992, when most fragments had been isolated for at least 8 years, and 2001. Our objectives were to determine whether high extinction rates documented soon after isolation continued through up to 20 years after isolation, and to examine fragment size and landscape effects on extinction. Location: Biological Dynamics of Forest Fragments Project, near Manaus, Brazil. Methods: Through 1992, birds were surveyed with standardized mist net sampling in ten 1- to 100-ha fragments. We repeated the mist net protocol in 2000-01. We also added remote taping of the dawn chorus and tape playback surveys for species captured in 1991-92 but not in 2000-01. Results: Between 1992 and 2001, 37 species went extinct in at least one fragment. As expected, extinction rate decreased with increasing fragment size. Over 30% of species went extinct in 1-ha fragments, compared to about 5% in 100-ha fragments. Extinction followed a predictable pattern: most species lost from 100-ha fragments between 1992 and 2001 had already gone extinct in smaller fragments before 1992. Despite extinctions, fragments gained species between 1992 and 2001, apparently due to species moving through the developing second growth matrix. Fragments surrounded by old second growth had lower extinction rates than predicted based on fragment size alone. Main conclusions: Sequential extinctions occurred for at least 20 years. Some additional species previously lost from smaller fragments may continue to go extinct in 100-ha fragments. At the same time, species assemblages in 1- and 10-ha fragments mostly reflect second-growth dynamics by 20 years after isolation. High species loss predicted from the first few years after isolation has not occurred, almost certainly because of recolonization. © 2008 The Authors.
format Artigo
author Stouffer, Philip C.
author2 Strong, Cheryl M.
Naka, Luciano Nicol?s
author2Str Strong, Cheryl M.
Naka, Luciano Nicol?s
title Twenty years of understorey bird extinctions from Amazonian rain forest fragments: Consistent trends and landscape-mediated dynamics
title_short Twenty years of understorey bird extinctions from Amazonian rain forest fragments: Consistent trends and landscape-mediated dynamics
title_full Twenty years of understorey bird extinctions from Amazonian rain forest fragments: Consistent trends and landscape-mediated dynamics
title_fullStr Twenty years of understorey bird extinctions from Amazonian rain forest fragments: Consistent trends and landscape-mediated dynamics
title_full_unstemmed Twenty years of understorey bird extinctions from Amazonian rain forest fragments: Consistent trends and landscape-mediated dynamics
title_sort twenty years of understorey bird extinctions from amazonian rain forest fragments: consistent trends and landscape-mediated dynamics
publisher Diversity and Distributions
publishDate 2020
url https://repositorio.inpa.gov.br/handle/1/18491
_version_ 1787141153216266240
score 11.653393

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