Forest reserve size mattered, but different taxa responded to different habitat features
WHAT THE EVIDENCE SAYS
Researchers measured diversity of beetles, spiders, birds and soil fungi in 44 protected forests. Fungi, beetle and spider diversity increased with reserve size; bird diversity showed interactions between reserve size and surrounding forest cover, while certain forest specialists showed no simple area response. Deadwood, canopy-height diversity and tree microhabitats had different relationships to different taxa.
WHY IT MATTERS / OUR READ
The area available to ecological processes matters, but structure and forest context determine which organisms benefit. Reserve design should consider expansion and forest-specific habitat features rather than declaring success from total hectares or one focal species.
CAVEATS / UNCERTAINTY
The study is observational across three forest types, and measured associations need not indicate effects caused by reserve designation. Individual taxonomic groups and local forest specialists differed markedly.
SOURCE
Huber et al. · Biodiversity and Conservation · 44 forest reserves
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A 44-reserve European comparison complicates the idea of one universal biodiversity indicator.
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