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Terrestrial Habitat Use by Nesting Painted Turtles in Landscapes with Different Levels of Fragmentation
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Terrestrial Habitat Use by Nesting Painted Turtles in Landscapes with Different Levels of Fragmentation

著者: Elizabeth A Baldwin; Michael N Marchand; John A Litvaitis
版本/格式: 文章 文章 : 英语
刊登在:Northeastern Naturalist, 2004, vol. 11, no. 1, p. 41-48
数据库:JSTOR
其它数据库: British Library Serials
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文件类型: 文章
所有的著者/提供者: Elizabeth A Baldwin; Michael N Marchand; John A Litvaitis
ISSN:1092-6194
OCLC号码: 486751168
语言注释: English
注意: Figure 1. Roads associated with three ponds in southeastern New Hampshire where female nesting movements were investigated.
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摘要:

As part of a comprehensive study of the effects of landscape change on the demography of aquatic turtles, we investigated the use of upland habitats by adult female painted turtles (Chrysemys picta) during the nesting season. We intentionally selected three ponds that were surrounded by a range of land uses and development (e.g., road density ranged from 0.9 to 7.3 km/km<sup>2</sup>. Terrestrial locations of transmitter-equipped turtles (n = 8) and unmarked females that were incidentally encountered (n = 10) were recorded to: i) determine the distance traveled to nesting habitat, ii) estimate the frequency that female turtles crossed roads to reach nesting habitat, and iii) examine how the abundance of potential nesting habitat affected distance traveled. Average straight-line distance from shoreline to the site a female turtle was encountered ranged from 54 to 115 m for the three ponds. We estimated that marked turtles made five road crossings and two turtles were killed by vehicles. Distance traveled was negatively correlated with the abundance of nesting habitat near a pond. Although adult females are probably less vulnerable when nesting occurs near pond shores, nests created near pond edges may be more vulnerable to predation. As a result, providing additional nesting habitat away from roads and other potential sources of mortality may enhance recruitment among local turtle populations.

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