Journal
ECOLOGY LETTERS
Volume 22, Issue 5, Pages 847-854Publisher
WILEY
DOI: 10.1111/ele.13242
Keywords
Anthropogenic; biodiversity; colonisation; extinction; population change
Categories
Funding
- European Research Council [AdG BioTIME 250189, PoC BioCHANGE 72744]
- Leverhulme Trust
- John Templeton Foundation [60501]
- USDA Hatch grant [1011538]
- NSF ABI grant [1660000]
- Direct For Biological Sciences
- Div Of Biological Infrastructure [1660000] Funding Source: National Science Foundation
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Scientists disagree about the nature of biodiversity change. While there is evidence for widespread declines from population surveys, assemblage surveys reveal a mix of declines and increases. These conflicting conclusions may be caused by the use of different metrics: assemblage metrics may average out drastic changes in individual populations. Alternatively, differences may arise from data sources: populations monitored individually, versus whole-assemblage monitoring. To test these hypotheses, we estimated population change metrics using assemblage data. For a set of 23 241 populations, 16 009 species, in 158 assemblages, we detected significantly accelerating extinction and colonisation rates, with both rates being approximately balanced. Most populations (85%) did not show significant trends in abundance, and those that did were balanced between winners (8%) and losers (7%). Thus, population metrics estimated with assemblage data are commensurate with assemblage metrics and reveal sustained and increasing species turnover.
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