No net insect abundance and diversity declines across US Long Term Ecological Research sites
No net insect abundance and diversity declines across US Long Term Ecological Research sites
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DOI：
10.1038/s41559-020-1269-4
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发表时间：
2020-08-10
影响因子：
16.8
通讯作者：
Moran, Matthew D.
中科院分区：
文献类型：
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作者：
Crossley, Michael S.;Meier, Amanda R.;Moran, Matthew D.
作者分析了美国长期生态研究网络内 68 个地点的超过 5,000 个昆虫和其他节肢动物种群丰度时间序列，发现地点和类群之间的丰度和多样性存在很大差异，但没有总体趋势。最近有关昆虫丰度急剧下降的报告表明，这对全球生态系统和人类社会产生了严重后果。然而，大多数证据来自欧洲，这使得全球昆虫种群趋势存在不确定性。我们使用了超过 5,300 个昆虫和其他节肢动物的时间序列，这些时间序列是在 4-36 年间在代表 68 个不同自然和管理区域的监测点收集的，以寻找美国各地昆虫和节肢动物数量下降的证据。一些类群和地点显示丰度和多样性下降，而其他类群和地点则增加或保持不变，产生的净丰度和生物多样性趋势通常与零没有区别。这种整体增加或减少的缺乏在节肢动物摄食群体中是一致的，并且对于受到严重干扰的地点与相对自然的地点来说是相似的。美国节肢动物种群的明显稳健性令人放心。然而，这一结果并没有减少持续监测的必要性，并且可能掩盖物种组成的微妙变化，从而危及昆虫提供的生态系统服务。
Analysing >5,000 population abundance time series for insects and other arthropods from 68 sites within the US Long Term Ecological Research network, the authors find high variation but no overall trend in abundance and diversity among sites and taxa.Recent reports of dramatic declines in insect abundance suggest grave consequences for global ecosystems and human society. Most evidence comes from Europe, however, leaving uncertainty about insect population trends worldwide. We used >5,300 time series for insects and other arthropods, collected over 4-36 years at monitoring sites representing 68 different natural and managed areas, to search for evidence of declines across the United States. Some taxa and sites showed decreases in abundance and diversity while others increased or were unchanged, yielding net abundance and biodiversity trends generally indistinguishable from zero. This lack of overall increase or decline was consistent across arthropod feeding groups and was similar for heavily disturbed versus relatively natural sites. The apparent robustness of US arthropod populations is reassuring. Yet, this result does not diminish the need for continued monitoring and could mask subtler changes in species composition that nonetheless endanger insect-provided ecosystem services.