Topic 160
ecology conservation species habitat biodiversity richness forest ecological geographic extinction sampling estimate diversity areas scales spatial management size surveys birds across status iucn distribution area estimated records patterns estimates use population threat fragmentation models large influence data land habitats trend survey occurrence bird space taxonomic ecosystem sampled wildlife assess case assessments some endangered threatened science surveyed change trends accuracy risk distributions relationship variables sample reef bias ecosystems research generalized scale landscapes higher anthropogenic local five groups year than monitoring simulated index metric indicators support declining important assessment recommend mammal 2018 abundance landscape most island importance quantifying urban distance environmental decline
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