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相关概念视频

Habitat Fragmentation02:31

Habitat Fragmentation

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Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition.
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Migration00:53

Migration

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Migration is long-range, seasonal movement from one region or habitat to another. This common strategy, carried out by many different organisms around the world, is an adaptive response that typically corresponds to changes in an organism’s environment, like resource availability or climate. Migrations can involve huge groups of thousands of animals as well as single individuals traveling alone and can range from thousands of kilometers to just a few hundred meters.
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相关实验视频

Updated: Jul 1, 2025

Integrating Remote Sensing with Species Distribution Models; Mapping Tamarisk Invasions Using the Software for Assisted Habitat Modeling SAHM
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使用时间显式息地选择 (TEHS) 模型弥合移动数据和连接分析之间的差距.

Denis Valle1, Nina Attias2,3, Joshua A Cullen4

  • 1School of Forest, Fisheries, and Geomatics Sciences, University of Florida, Gainesville, FL, USA. drvalle@ufl.edu.

Movement ecology
|March 1, 2024
PubMed
概括

一个新的时间显式息地选择 (TEHS) 模型有助于理解碎片化景观中的物种运动. 它揭示了白天的时间和息地特征如何影响巨型食者的路径,改进了连接分析.

关键词:
连接分析 连接分析这是一只巨大的食者.景观的阻力 景观的阻力景观使用 景观使用运动生态学运动生态学步骤选择步骤选择野生动物走廊是野生动物走廊.

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科学领域:

  • 生态生态学 生态生态学
  • 保护生物学 保护生物学
  • 空间分析 空间分析

背景情况:

  • 由于人类活动造成的息地碎片化,需要了解物种运动的保护.
  • 准确的连接分析依赖于景观阻力测量,但在计算方面缺乏共识.
  • 这种模两可可能导致在预测物种传播路线和走廊方面产生不同的结果.

研究的目的:

  • 为景观连接性分析引入一种新的时间显式息地选择 (TEHS) 模型.
  • 将运动分解为时间和息地选择组件,以便对空间使用有原则的理解.
  • 将TEHS模型应用于巴西潘坦纳尔地区巨型食者的GPS跟踪数据.

主要方法:

  • 开发了TEHS模型,将运动分为穿越时间和息地选择驱动因素.
  • 分析了巨型食动物的GPS跟踪数据,以参数化TEHS模型.
  • 利用一个空间吸收马尔科夫链框架来模拟运动和连接.

主要成果:

  • 巨型食者表现出夜/夜间移动模式,在晚上8点至凌晨5点之间移动速度最快.
  • 移动速度在息地之间差异很大:在湿地更快,在森林和草原中比草原慢.
  • 避免了湿地,而选择了森林和草原,森林的选择随着温度的增加而增加,这表明了热避难的功能.
  • 连接模拟显示,由于避开息地,巨型食者偏离最短的路径.

结论:

  • TEHS模型通过将运动分为时间和选择组件,有效地描述个人对景观特征的感知.
  • 这个框架将移动数据与连接性分析集成在一起,使时间明确的连接性预测成为可能.
  • 该方法提供了对碎片化景观中物种移动的更细致的理解,这对于有效的保护规划至关重要.