Decline of the North American avifauna
Decline of the North American avifauna
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DOI：
10.1126/science.aaw1313
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发表时间：
2019-10-04
期刊：
影响因子：
56.9
通讯作者：
Marra, Peter P.
中科院分区：
文献类型：
--
作者：
Rosenberg, Kenneth V.;Dokter, Adriaan M.;Marra, Peter P.
物种灭绝定义了全球生物多样性危机，但灭绝始于大量个体的丧失，这可能导致生态系统的组成和功能变化。使用多个独立的监测网络，我们报告了48年来北美大部分鸟类的种群损失，包括曾经常见的物种和大多数生物群落。整合范围广泛的人口轨迹和规模估计表明，净损失接近30亿只鸟，或1970年丰度的29%。一个覆盖整个大陆的气象雷达网也显示，在最近10年期间，候鸟的生物量也出现了类似的急剧下降。鸟类数量的减少表明，迫切需要解决威胁，以避免未来鸟类崩溃和相关的生态系统完整性，功能和服务的损失。
Species extinctions have defined the global biodiversity crisis, but extinction begins with loss in abundance of individuals that can result in compositional and functional changes of ecosystems. Using multiple and independent monitoring networks, we report population losses across much of the North American avifauna over 48 years, including once-common species and from most biomes. Integration of range-wide population trajectories and size estimates indicates a net loss approaching 3 billion birds, or 29% of 1970 abundance. A continent-wide weather radar network also reveals a similarly steep decline in biomass passage of migrating birds over a recent 10-year period. This loss of bird abundance signals an urgent need to address threats to avert future avifaunal collapse and associated loss of ecosystem integrity, function, and services.