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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培养的联系，以改善受威胁的两栖物种的保护成果

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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：湿地不应被视为独立的物体，而是作为动态连接的物体，统称为湿地景观。我们开发了一个框架，分析了湿地适用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用性指数和用于两栖群体动态的湿地连接性的运动渗透性指数。这些指数由光栅数据集和时变洪水估算计算。索引用于定义湿地景观，两栖模型用于模拟湿地景观内的人口动态。该框架应用于加拿大艾伯塔省的一座高度修改的湿地景观的鼻溪流域。用不同的栖息地偏好选择了两种两栖物种：北部豹蛙喜欢潮湿的栖息地并在陆地上具有高的流动性，而大的平原蟾蜍更喜欢陆地栖息地并在陆地上具有低流动性。我们发现每个两栖物种都有一个“首选”湿地景观，反映了他们的生命周期特征和移民策略，反过来依赖于湿地景观中的水文和生态联系。本研究强调了调查单个湿地和湿地景观的重要性，并考虑湿地栖息地质量和连通性，作为非可替代性的属性，这些属性共同行动，但不同的是人口动态。

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