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首页> 外文期刊>Journal of the American Water Resources Association >Safeguarding Wetlands and Their Connections within Wetlandscapes to Improve Conservation Outcomes for Threatened Amphibian Species
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Safeguarding Wetlands and Their Connections within Wetlandscapes to Improve Conservation Outcomes for Threatened Amphibian Species

机译：保护湿地及其在湿地景观中的联系，以改善受威胁的两栖动物的保护成果。

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摘要

Wetlands should not be considered as independent objects but as dynamically connected objects, collectively known as wetlandscapes. We developed a framework that analyzes the influences of wetland suitability and connectivity on amphibian distributions. We defined two indices: a Wetland Suitability Index describing wetland quality and a Movement Permeability Index characterizing wetland connectivity for amphibian population dynamics. These indices were calculated from raster datasets and time-varying inundation estimates. The indices were used to define a wetlandscape and an amphibian model was used to simulate population dynamics within the wetlandscape. The framework was applied to the Nose Creek watershed, a highly modified wetlandscape in Alberta, Canada. Two amphibian species were selected with different habitat preferences: the Northern Leopard Frog that prefers wet habitats and has high mobility over land, and the Great Plains Toad that prefers terrestrial habitats and has low mobility over land. We found each amphibian species had a "preferred" wetlandscape, reflecting their life cycle traits and migration strategies which in turn were dependent on the hydrological and ecological connections within the wetlandscape. This study highlights the importance of investigating both individual wetlands and the wetlandscape and considering both wetland habitat quality and connectivity as non-substitutable properties that act jointly, but differently, on population dynamics.
机译：湿地不应视为独立的对象，而应视为动态连接的对象，统称为湿地景观。我们开发了一个框架，用于分析湿地适宜性和连通性对两栖动物分布的影响。我们定义了两个指数：描述湿地质量的湿地适应性指数和表征两栖动物种群动态的湿地连通性的运动渗透性指数。这些指标是根据栅格数据集和随时间变化的淹没估计值计算得出的。指数用于定义湿地景观，两栖模型用于模拟湿地景观内的种群动态。该框架已应用于加拿大艾伯塔省经过高度改造的湿地景观-鼻子溪流域。选择了两种具有不同栖息地偏好的两栖动物：北豹蛙更喜欢潮湿的栖息地，在陆地上迁移率高；大平原蟾蜍更喜欢陆地栖息地，在陆地上迁移率低。我们发现每个两栖动物物种都有一个“首选”湿地景观，反映了它们的生命周期特征和迁移策略，而这些策略又取决于湿地景观中的水文和生态联系。这项研究强调了调查单个湿地和湿地景观以及将湿地生境质量和连通性视为不可替代的性质，共同作用于人口动态的不同替代性质的重要性。

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