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首页> 外文期刊>Landscape and Urban Planning >Accessible habitat and wetland structure drive occupancy dynamics of a threatened amphibian across a peri-urban landscape
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Accessible habitat and wetland structure drive occupancy dynamics of a threatened amphibian across a peri-urban landscape

机译：无障碍的栖息地和湿地结构在一个城市景观中驱动威胁两栖动物的占用动态

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Populations of aquatic-breeding amphibians are declining from habitat loss, fragmentation and degradation. Identifying how populations are affected by landscape barriers such as roads is essential for conservation and requires understanding the processes underpinning species occupancy in fragmented landscapes. Here, I assessed relationships between the occupancy dynamics of the threatened green and golden bell frog (Litoria aurea) and accessible habitat; i.e., the area of breeding and non-breeding habitat around a wetland that can be reached by an amphibian without having to cross a highway. I hypothesised that relationships between occupancy and accessible habitat would be stronger than relationships with the area of extant native vegetation, road density or distance to the highway. I also examined relationships with local habitat variables over a three-year period. Relationships with accessible habitat were stronger and more certain in explaining L. aurea occupancy and colonisation than other landscape variables. Accessible habitat was positively associated with wetland occupancy, which suggests the highway is having a barrier effect on the population. There was a positive relationship between road density and the probability of local extinction. Occupancy rates at highway compensatory ponds increased from near-zero within six months of pond construction, to & 30% after 12 months. There was a negative relationship between local extinction and aquatic vegetation cover, highlighting the importance of habitat structure for L. aurea. Urban planners should consider accessible habitat when managing amphibian species in rapidly urbanising landscapes, so that all habitats required throughout a species' life cycle are protected.
机译：水生繁殖的两栖动物的种群从栖息地损失，碎片和退化都会从栖息地损失下降。确定人口如何受到道路的景观障碍的影响，这些障碍对于保护是必不可少的，并且需要了解资金化物种在分散的景观中的过程。在这里，我评估了受威胁的绿色和金色贝尔青蛙（Litoria Aurea）和无障碍栖息地之间的占用动态之间的关系;即，在湿地周围的繁殖和非育种栖息地，可以通过两栖动物到达的湿地，而无需穿过高速公路。我假设占用和无障碍栖息地之间的关系比与现存本地植被，道路密度或与高速公路距离的关系强大。我还在为期三年内审查了与地方栖息地变量的关系。与无障碍栖息地的关系更强，更肯定地解释L. Aurea占用和殖民，而不是其他景观变量。无障碍的栖息地与湿地入住率有关，这表明高速公路对人口对障碍影响障碍。道路密度与地方灭绝的概率之间存在正面关系。高速公路补偿池的入住率从占地面积六个月内的近零增加到＆amp; 12个月后30％。局部灭绝与水生植被覆盖之间存在负面关系，突出了栖息地结构对肺炎菌族的重要性。在快速城市风景中管理两栖物种时，城市规划人员应考虑可访问的栖息地，以便在整个物种生命周期中所需的所有栖息地受到保护。

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