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首页> 外文期刊>Ecological research >Habitat loss and mammalian extinction patterns: are the reserves in the Quadrilatero Ferrifero, southeastern Brazil, effective in conserving mammals?
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Habitat loss and mammalian extinction patterns: are the reserves in the Quadrilatero Ferrifero, southeastern Brazil, effective in conserving mammals?

机译：栖息地的丧失和哺乳动物的灭绝模式：巴西东南部Quadrilatero Ferrifero的保护区是否对养护哺乳动物有效？

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摘要

Habitat loss is considered to be the principal cause of the local extinction of mammals worldwide. We assessed the extinction pattern of medium- and large-sized mammals caused by the effects of habitat loss in reserves in the Quadrilatero Ferrifero, southeastern Brazil, and discussed the effectiveness of these natural remnants for conserving mammals. A literature review and field collections were conducted from 2006 to 2011 to estimate the composition and richness of mammals in nine remnants of different sizes, including reserves and non-protected areas. A species-area relation and a nested subset analysis were performed, and a degree of sensitivity to habitat loss was obtained for each species according to its frequency of occurrence. Forty-five species of mammals were recorded. There was a strong species-area relation involving the legal size of reserves. High species richness was associated with large reserves, and the z value was within the range of very isolated continental remnants. The mammalian community exhibited a nested occurrence pattern, suggesting that most species were part of a more continuous ecosystem and that non-random extinction caused by habitat loss occurred in southeastern Brazil. The negative relation found between species frequencies and body weights suggested that selective species loss is associated with decreases in the size of the reserves. The estimated viable size required to conserve all of the sensitive species is greater than the size of the largest reserve inventoried. We recommend the aggregation of neighboring natural remnants and the creation of new reserves to reduce extinction risks.
机译：生境的丧失被认为是全世界哺乳动物局部灭绝的主要原因。我们评估了巴西东南部Quadrilatero Ferrifero保护区中栖息地丧失所造成的中型和大型哺乳动物的灭绝模式，并讨论了这些自然残留物对保护哺乳动物的有效性。从2006年至2011年进行了文献回顾和实地收集，以估计9种不同大小的残余物（包括保护区和非保护区）中哺乳动物的组成和丰富度。进行了物种-面积关系和嵌套子集分析，并根据每种物种的发生频率获得了对栖息地丧失的敏感性程度。记录了四十五种哺乳动物。物种与地区之间的关系很紧密，涉及法定的保护区面积。高物种丰富度与高储量有关，z值在非常孤立的大陆残余物的范围内。哺乳动物群落表现出嵌套的发生模式，表明大多数物种是更连续的生态系统的一部分，并且由巴西东南部的栖息地丧失引起的非随机灭绝。在物种频率和体重之间发现负相关关系，表明选择性物种流失与保护区面积的减少有关。保护所有敏感物种所需的估计生存规模大于盘存的最大保护物种的规模。我们建议聚集邻近的自然遗迹并建立新的保护区，以减少灭绝的风险。

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  • 来源
    《Ecological research》 |2013年第6期|935-947|共13页
  • 作者

    Thais Queiroz Morcatty; Hani Rocha El Bizri; Hellem Cristina Silva Carneiro; Rodrigo Ludolf Biasizzo; Candida Radicchi de Oliveira Almeri; Ericson Sousa da Silva; Flavio Henrique Guimaraes Rodrigues; Jose Eugenio Cortes Figueira;

  • 作者单位

    Laboratory of Mammal Ecology, Biological Sciences Institute,Federal University of Minas Gerais, Avenida Antonio Carlos 6627,Pampulha, 30161-970 Belo Horizonte, Minas Gerais, Brazil,Research Group on Terrestrial Vertebrate Ecology, Mamiraua Sustainable Development Institute, Estrada do Bexiga 2584,Fonte Boa, 38 69470-000 Tefe, Amazonas, Brazil;

    Laboratory of Mammal Ecology, Biological Sciences Institute,Federal University of Minas Gerais, Avenida Antonio Carlos 6627,Pampulha, 30161-970 Belo Horizonte, Minas Gerais, Brazil,Research Group on Terrestrial Vertebrate Ecology, Mamiraua Sustainable Development Institute, Estrada do Bexiga 2584,Fonte Boa, 38 69470-000 Tefe, Amazonas, Brazil;

    Laboratory of Mammal Ecology, Biological Sciences Institute,Federal University of Minas Gerais, Avenida Antonio Carlos 6627,Pampulha, 30161-970 Belo Horizonte, Minas Gerais, Brazil;

    Laboratory of Mammal Ecology, Biological Sciences Institute,Federal University of Minas Gerais, Avenida Antonio Carlos 6627,Pampulha, 30161-970 Belo Horizonte, Minas Gerais, Brazil;

    Laboratory of Mammal Ecology, Biological Sciences Institute,Federal University of Minas Gerais, Avenida Antonio Carlos 6627,Pampulha, 30161-970 Belo Horizonte, Minas Gerais, Brazil;

    Laboratory of Mammal Ecology, Biological Sciences Institute,Federal University of Minas Gerais, Avenida Antonio Carlos 6627,Pampulha, 30161-970 Belo Horizonte, Minas Gerais, Brazil;

    Laboratory of Mammal Ecology, Biological Sciences Institute,Federal University of Minas Gerais, Avenida Antonio Carlos 6627,Pampulha, 30161-970 Belo Horizonte, Minas Gerais, Brazil;

    Laboratory of Population Ecology, Biological Sciences Institute,Federal University of Minas Gerais, Avenida Antonio Carlos 6627,Pampulha, 30161-970 Belo Horizonte, Minas Gerais, Brazil;

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  • 正文语种 eng
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  • 关键词

    Habitat loss; Inventory; Species-area relation; Threatened species; Habitat remnants;

    机译：栖息地的丧失;库存;种间关系;受威胁物种;生境残余;

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