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首页> 外文期刊>Southeastern naturalist >Status of Eastern Woodrats in Isolated Remnant Populations Following Genetic Augmentation and Habitat Disturbance
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Status of Eastern Woodrats in Isolated Remnant Populations Following Genetic Augmentation and Habitat Disturbance

机译:在遗传增强和栖息地干扰之后,孤立的遗留群体东伍德族的地位

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摘要

In Illinois, Neotoma floridana (Eastern Woodrat) experienced range reductions and population bottlenecking over the past century. During the period 2004-2005, the isolated remnant populations along the Mississippi bluffs in southwestern Illinois were genetically augmented with 47 Eastern Woodrats from Arkansas and Missouri, resulting in 40% admixture within the largest population. In 2009, a strong windstorm created canopy gaps and woody debris throughout this area, potentially improving habitat for Eastern Woodrats. We investigated the status of Eastern Woodrat populations in southwestern Illinois by livetrapping remnant populations and conducting sign surveys from 2011 to 2015. We captured 263 Eastern Woodrats; mean trapping success was 62.5% higher than trapping during the 1990s, and the number of individuals captured per trap-night was 3-6 times higher than trapping events during the previous 18 years (all P 0.001). We also located sign of Eastern Woodrat 8.9 km east of the remnant populations. We recommend further genetic monitoring to evaluate whether population increases are coupled with increased admixture and recommend forest-management actions that create habitat disturbance and resultant piles of woody debris that increase woodrat habitat quality.
机译:在伊利诺伊州,佛罗里达州德国田(东伍德德德)在过去的世纪经历了范围减税和人口瓶颈。在2004 - 2005年期间,伊利诺伊州西南部密西西比瓦夫的孤立的残余群体在阿肯色州和密苏里州的47个东伍德族被遗传上推动,导致人口中最大的40%递增40%。 2009年,一个强大的风暴在这一领域创造了树冠差距和木质碎片,潜在地改善了东伍德族的栖息地。我们在2011年至2015年将伊利诺伊州西南伊利诺伊州东南伍德德尔群体的地位调查了伊利诺伊州西南部的地位。我们捕获了263名东伍德族;在20世纪90年代,平均捕获成功比陷阱高出62.5%,并且每个陷阱夜捕获的人数比以前的18年捕获事件高3-6倍(所有P <0.001)。我们还找到了东伍德德东部的迹象8.9公里,位于残余人口。我们建议进一步的遗传监测来评估人口增加是否加上了越来越多的森林和建议森林管理行动,这些行动创造了栖息地干扰和堆积的木质碎片,这些碎片增加了伍迪栖息地质量。

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  • 来源
    《Southeastern naturalist》 |2018年第2期|共18页
  • 作者单位

    Southern Illinois Univ Cooperat Wildlife Res Lab Dept Zool Carbondale IL 62901 USA;

    Southern Illinois Univ Cooperat Wildlife Res Lab Dept Zool Carbondale IL 62901 USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 自然地理学;
  • 关键词

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