■进行了有限的研究,这些研究比较了洪泛区生态系统中河岸和水生鸟类群落结构的局部和景观尺度生态决定因素。
■这里,我们量化了当地栖息地结构的贡献,在多瑙河相对完整的洪泛区中,采样点的土地覆盖和空间配置对水生和陆生鸟类群落的分类学和功能结构,匈牙利。
■我们在部分冗余分析中使用物种和觅食行会的相对丰度作为响应变量,以确定每个变量组的相对重要性。
■对于水生和陆生鸟类以及分类学和觅食行会结构,水体的局部尺度特征的影响均小于土地覆盖和空间变量。纯空间变量是重要的决定因素,除了纯粹的环境和由环境和空间变量解释的变异的共享比例。社区结构的可预测性通常向最低土地覆盖测量尺度(即,500、250或125m半径缓冲区)。不同的土地覆盖类型在每个尺度上做出了贡献,它们的重要性取决于水生和陆生群落。
■这些结果表明洪泛区鸟类群落对土地覆盖和空间配置的响应相对强烈。他们还建议,扩散动力学和质量效应机制对于理解洪泛区鸟类群落的结构至关重要,因此,应通过保护管理策略加以考虑。
■在线版本包含补充材料,可在10.1007/s10980-024-01948-3获得。
UNASSIGNED: There has been a limited amount of research which comparatively examines the local and landscape scale ecological determinants of the community structure of both riparian and aquatic bird communities in floodplain ecosystems.
UNASSIGNED: Here, we quantified the contribution of local habitat structure, land cover and spatial configuration of the sampling sites to the taxonomical and functional structuring of aquatic and terrestrial bird communities in a relatively intact floodplain of the river Danube, Hungary.
UNASSIGNED: We used the relative abundance of species and foraging guilds as response variables in partial redundancy analyses to determine the relative importance of each variable group.
UNASSIGNED: Local-scale characteristics of the water bodies proved to be less influential than land cover and spatial variables both for aquatic and terrestrial birds and both for taxonomic and foraging guild structures. Purely spatial variables were important determinants, besides purely environmental and the shared proportion of variation explained by environmental and spatial variables. The predictability of community structuring generally increased towards the lowest land cover measurement scales (i.e., 500, 250 or 125 m radius buffers). Different land cover types contributed at each scale, and their importance depended on aquatic vs terrestrial communities.
UNASSIGNED: These results indicate the relatively strong response of floodplain bird communities to land cover and spatial configuration. They also suggest that dispersal dynamics and mass-effect mechanisms are critically important for understanding the structuring of floodplain bird communities, and should therefore be considered by conservation management strategies.
UNASSIGNED: The online version contains supplementary material available at 10.1007/s10980-024-01948-3.