不同尺度下停歇点湿地对迁徙水鸟的影响研究综述

停歇点湿地是迁徙水鸟重要的能量补给地,在水鸟每年的往返迁徙过程中具有十分重要的生态意义。近年来随着全球变化和人类活动增加,迁飞路线上的停歇点湿地正发生剧烈变化。各个停歇点湿地的生境变化及周围环境不仅是影响水鸟栖息地适宜性的重要因素,还改变了各路线上迁徙水鸟的种群大小和群落多样性。分析不同尺度下停歇点湿地影响迁徙水鸟种群变化的主要生态因子和环境因素,不仅有助于理解各停歇点景观变化的生态效应,也可为迁徙水鸟种群保护提供理论支持。首先分析了在栖息地斑块尺度上停歇点湿地内的水、食物、栖息地格局和人类干扰等生态要素对水鸟觅食和栖息活动的影响;其次,分析了景观尺度上湿地周围的气候变化、土地利用和外来生物等环境条件在各停歇点对水鸟栖息地质量的改变;最后,基于多尺度条件下湿地影响因素的耦合效应,分析了当前湿地生境与水鸟种群关系研究中存在的主要问题,并总结了对湿地和水鸟保护的启示。

The effect of stopover wetlands on migratory waterbirds at different scales: a review

Stopover wetlands are important refueling stations for numerous migratory waterbird species, and are ecologically significant in the annual cycle of birds. Recently, stopover wetlands located on flyways were faced with dramatic changes owing to global warming and increasing human activities. Previous studies have suggested that both habitat and environmental factors of these wetlands contributed to the habitat suitability of various species, and the key factors affecting the abundance and diversity of waterbird communities. Therefore, it would be helpful to understand the ecological effects of landscape changes at each stopover by analyzing the diverse habitats and environmental factors that affect various waterbird populations during migration. Furthermore, it would provide theoretical support necessary to formulate effective conservation strategies. In this review, we systematically analyzed how habitat factors such as water body, food resources, habitat configuration, and human disturbance affect the foraging and resting of waterbirds at a local scale. Then, we discussed various environmental contexts, including global warming, land use, and exotic species, that indirectly affect habitat suitability and bird migration at the landscape scale. Finally, on the basis of the coupling effects of various influencing factors that were related to stopover wetlands at different scales, we summarized some shortages based on the research of the present relationships between wetlands and waterbirds, and suggested some priorities for future studies and environmental conservation.