Global Bird Diversity Is Facing Increasing Threats

Human activities in the modern world continue to drive the loss and degradation of natural habitats such as forests, grasslands and wetlands, placing global bird diversity under unprecedented pressure. Measures aimed at mitigating these threats—including the establishment of nature reserves and national parks, restrictions on hunting, stronger wildlife protection laws and policies to reduce carbon emissions—have so far proved insufficient to halt species extinctions and the erosion of ecological functions. By integrating global information on conservation threats with bird trait data, researchers constructed predictive models to explore how different conservation strategies might influence species persistence and functional diversity over the coming century. The trait data used in this work were drawn from the AVONET database, which compiles morphological measurements for more than 11,000 bird species worldwide, including attributes such as body mass, beak length and wing morphology. These traits effectively describe the ecological niches occupied by different bird species and are frequently used to estimate functional diversity—the diversity of ecological roles performed by organisms within ecosystems. Differences in body size, flight style, pollination behavior, trophic level, diet type, burrowing behavior and nesting strategies all contribute to this functional variation.

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