Understanding wetland bird responses to landscape patterns is central for wetland management and bird conservation. This is particularly relevant on islands, where most of the global extinctions have occurred. In this study, we identified landscape patterns in wetlands on Cozumel Island that best explained abundance of birds grouped in 13 trophic guilds at 3 spatial scales (145, 300, and 850 m radius from count points). By using ordination techniques and generalized linear models we found a scale dependent dissimilarity between the use of extensive estuarine and small inland brackish wetlands. At finer spatial scales, abundance of birds in trophic guilds that mainly use estuarine or inland brackish wetlands was associated with the proportion of land cover types of the corresponding wetland type, whereas at the broadest spatial scale, connectivity of such land cover types was more important. Abundance of birds in trophic guilds that do not prefer any particular type of wetland did not show any relationship with landscape diversity nor connectivity of land cover types, but their abundance showed relationships with specific land cover types from both estuarine and inland brackish wetlands as well as with bordering wetland vegetation. We concluded that the presence of continuous extents of land cover types of both extensive estuarine and small inland brackish wetlands are important for the conservation of distinct wetland bird assemblages on Cozumel Island.

中文翻译：

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湿地鸟类组合对新热带岛屿上景观格局的多尺度响应：当湿地类型比大小重要时

了解湿地鸟类对景观格局的反应对于湿地管理和鸟类保护至关重要。在大多数全球灭绝已经发生的岛屿上，这一点尤为重要。在这项研究中，我们确定了科苏梅尔岛湿地的景观格局，可以最好地解释在3个空间尺度（从计数点开始的半径分别为145、300和850 m）下，在13个营养行会中成群的鸟类。通过使用排序技术和广义线性模型，我们发现了在广泛的河口和小型内陆微咸湿地之间的比例依赖差异。在更精细的空间尺度上，主要使用河口或内陆微咸湿地的营养行会中的鸟类数量与相应湿地类型的土地覆盖类型的比例有关，而在最广泛的空间尺度上，这种土地覆盖类型的连通性更为重要。在营养行会中，不喜欢任何特定类型的湿地的鸟类数量与景观多样性或土地覆盖类型的连通性均未显示任何关系，但它们的数量显示与河口和内陆微咸湿地以及特定的土地覆盖类型之间的关系与湿地植被接壤。我们得出的结论是，广泛的河口和内陆微咸湿地的土地覆盖类型的连续范围的存在对于保护科苏梅尔岛上独特的湿地鸟类群落很重要。但是它们的丰度显示出与河口和内陆微咸湿地的特定土地覆盖类型以及临近湿地植被的关系。我们得出的结论是，广泛的河口和内陆微咸湿地的土地覆盖类型的连续范围的存在对于保护科苏梅尔岛上独特的湿地鸟类群落很重要。但是它们的丰度显示出与河口和内陆微咸湿地的特定土地覆盖类型以及临近湿地植被的关系。我们得出的结论是，广泛的河口和内陆微咸湿地的土地覆盖类型的连续范围的存在对于保护科苏梅尔岛上独特的湿地鸟类群落很重要。