气候变化领域集成服务门户(CCPortal): Insect biomass decline scaled to species diversity: General patterns derived from a hoverfly community

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DOI	10.1073/PNAS.2002554117
	Insect biomass decline scaled to species diversity: General patterns derived from a hoverfly community
	Hallmann C.A.; Ssymank A.; Sorg M.; de Kroon H.; Jongejans E.
发表日期	2021
ISSN	00278424
卷号	118 期号:2
英文摘要	Reports of declines in biomass of flying insects have alarmed the world in recent years. However, how biomass declines reflect biodiversity loss is still an open question. Here, we analyze the abundance (19,604 individuals) of 162 hoverfly species (Diptera: Syrphidae), at six locations in German nature reserves in 1989 and 2014, and generalize the results with a model varying decline rates of common vs. rare species. We show isometric decline rates between total insect biomass and total hoverfly abundance and a scale-dependent decline in hoverfly species richness, ranging between −23% over the season to −82% at the daily level. We constructed a theoretical null model to explore how strong declines in total abundance translate to changing rank-abundance curves, species persistence, and diversity measures. Observed persistence rates were disproportionately lower than expected for species of intermediate abundance, while the rarest species showed decline and appearance rates consistent with random expectation. Our results suggest that large insect biomass declines are predictive of insect diversity declines. Under current threats, even the more common species are in peril, calling for a reevaluation of hazards and conservation strategies that traditionally target already rare and endangered species only. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Biodiversity loss; Insect decline; Temporal scaling
语种	英语
scopus关键词	adult; article; biodiversity; biomass; endangered species; expectation; female; human; human experiment; major clinical study; male; nonhuman; season; species diversity; species richness; Syrphidae
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/181111
作者单位	Institute for Water and Wetland Research, Radboud University, Nijmegen, 6525HP, Netherlands; Department II 2.2 “Habitats Directive/ Natura 2000,” Bundesamt für Naturschutz, Bonn, 53179, Germany; Entomological Society Krefeld, Krefeld, D 47798, Germany
推荐引用方式 GB/T 7714	Hallmann C.A.,Ssymank A.,Sorg M.,et al. Insect biomass decline scaled to species diversity: General patterns derived from a hoverfly community[J],2021,118(2).
APA	Hallmann C.A.,Ssymank A.,Sorg M.,de Kroon H.,&Jongejans E..(2021).Insect biomass decline scaled to species diversity: General patterns derived from a hoverfly community.Proceedings of the National Academy of Sciences of the United States of America,118(2).
MLA	Hallmann C.A.,et al."Insect biomass decline scaled to species diversity: General patterns derived from a hoverfly community".Proceedings of the National Academy of Sciences of the United States of America 118.2(2021).