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Conservation corridors for carnivores: Integrating pattern and process in the Canadian Rocky Mountains.

机译:食肉动物的保护走廊:加拿大落基山脉的整合模式和过程。

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摘要

Habitat loss, fragmentation, and urbanization threaten wide-ranging and area-sensitive large carnivores like grizzly bears (Ursus arctos L.) and cougars (Puma concolor L.). Within reserve networks, corridors are rarely designed to incorporate large carnivore resource selection and movement processes. I examine and model resource selection and movement based on data from Global Positioning System (GPS) radiocollared grizzly bears and cougars in Canmore and Crowsnest in the Canadian Rocky Mountains, Alberta, Canada. I examined three questions fundamental to corridor planning for large carnivores: (1) where are large carnivores more likely to occur?; (2) what landscape features promote their movements?; and, (3) how do these landscape features affect large carnivore movements?;Step selection function (SSF) models suggested movement of cougars occurred closer to paved roads and forest cover throughout the year and they avoided crossing paved roads in the non-winter season. During the berry season, movement of grizzly bears in Canmore and Crowsnest occurred closer to paved roads and shrubs. No large carnivore paths crossed slopes > 45 degrees. Patterns of selection and avoidance can be used to provide species- and landscape-specific guidelines for where movement might occur (sensur functional connectivity). I combined SSF results with analyses of step length to show that grizzly bears and cougars moved faster near paved roads during the berry and winter seasons, respectively. Conversely, cougars in Canmore and grizzly bears in both landscapes moved more slowly near forest and shrubs during the winter and berry seasons, respectively.;Compared to conventional corridor designs based on perceived structural connectedness and habitat quality, my study illustrates how a diverse, empirically based modelling approach can be used to incorporate large carnivore behavioural processes more explicitly into corridor identification and design.;Resource selection function (RSF) models suggested grizzly bears were more likely to occur in areas with high greenness values, a variable associated with bear forage. Cougars were more likely to occur in areas with low road density in Canmore during non-winter and in rugged terrain in Crowsnest Pass throughout the year. I developed least-cost paths based on the inverse of RSFs to identify potential corridors that might support movement of both species between patches of high RSF value.
机译:栖息地的丧失,破碎和城市化威胁着范围广泛且对面积敏感的大型食肉动物,例如灰熊(Ursus arctos L.)和美洲狮(Puma concolor L.)。在备用网络内,走廊很少设计成包含大型食肉动物资源的选择和移动过程。我根据来自加拿大阿尔伯塔省加拿大落基山脉的坎莫尔和克罗斯内斯特的全球定位系统(GPS)放射性领灰熊和美洲狮的数据,对资源选择和移动进行了建模和建模。我研究了大型食肉动物走廊规划的三个基本问题:(1)大型食肉动物更可能出现在哪里? (2)哪些景观特征促进了它们的运动? (3)这些景观特征如何影响大型食肉动物的运动?;阶跃选择函数(SSF)模型建议,美洲狮的运动全年发生在靠近铺路和森林覆盖的地方,并且避免了在非冬季越过铺路的情况。在浆果季节,坎莫尔和克罗斯内斯特的灰熊运动发生在靠近铺好的道路和灌木丛的地方。没有大型的食肉动物路径穿过大于45度的斜坡。选择和回避的模式可以用来为可能发生移动的地方提供特定于物种和景观的准则(感觉功能连接)。我将SSF结果与步长分析结合起来,以表明在浆果和冬季,灰熊和美洲狮分别在铺好的道路附近移动得更快。相反,在冬季和浆果季节,坎莫尔的美洲狮和灰熊在森林和灌木附近的移动速度分别更慢。与基于感知的结构连通性和栖息地质量的传统走廊设计相比,我的研究表明了如何在经验上进行多样化基于模型的建模方法可用于将大型食肉动物的行为过程更明确地整合到走廊识别和设计中。资源选择功能(RSF)模型表明,灰熊更可能出现在绿色度较高的区域,这是与熊饲料相关的变量。全年中,非冬季期间坎莫尔公路密度低的地区和克罗斯内斯特Pass口崎的地形中都容易出现美洲狮。我根据RSF的倒数开发了成本最低的路径,以识别可能支持两种物种在高RSF值之间移动的潜在走廊。

著录项

  • 作者单位

    University of Alberta (Canada).;

  • 授予单位 University of Alberta (Canada).;
  • 学科 Biology Ecology.;Biology Zoology.;Agriculture Forestry and Wildlife.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 174 p.
  • 总页数 174
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 老年病学;
  • 关键词

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