Insect biomass is not a consistent proxy for biodiversity metrics in wild bees

Recent studies have reported on dramatic cases of aerial insect population declines by focusing on the measure of the total biomass of caught insects. However, there is currently no consensus about how biomass patterns among sites and habitats might consistently capture the subtleties of changes in...

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Autores principales:	Nicolas J. Vereecken, Timothy Weekers, Nicolas Leclercq, Stéphane De Greef, Hélène Hainaut, Jean-Marc Molenberg, Youri Martin, Xavier Janssens, Grégoire Noël, Alain Pauly, Stuart P.M. Roberts, Leon Marshall
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Wild bees Community assembly Conservation Biomass Biodiversity Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/6bc2216835c44a47bff028b1b5415e2e
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spelling	oai:doaj.org-article:6bc2216835c44a47bff028b1b5415e2e2021-12-01T04:36:11ZInsect biomass is not a consistent proxy for biodiversity metrics in wild bees1470-160X10.1016/j.ecolind.2020.107132https://doaj.org/article/6bc2216835c44a47bff028b1b5415e2e2021-02-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X20310712https://doaj.org/toc/1470-160XRecent studies have reported on dramatic cases of aerial insect population declines by focusing on the measure of the total biomass of caught insects. However, there is currently no consensus about how biomass patterns among sites and habitats might consistently capture the subtleties of changes in aerial insect community structure. Here, we investigated the relationship between the total biomass of wild bees collected using pan traps in urban, agricultural, and semi-natural habitats on one hand, and a spectrum of biodiversity metrics on the other hand, particularly species richness (SR), alpha diversity, functional diversity (FD) and three different forms of phylogenetic diversity (PD). Our results indicate that although biomass is significantly and highly correlated with the abundance of wild bees, it is generally significantly but only moderately and non-linearly correlated to the various facets of wild bee diversity among habitats. By contrast, we also found that all three measures of PD used are consistent across habitats, suggesting that a taxonomic hierarchy based on Linnaean classification could be used as a proxy for the measurement of PD in wild bees, particularly in other well-studied areas such as Western Europe where a multi-gene molecular phylogeny is unavailable as yet. Collectively, our results illustrate the clear limitations of biodiversity monitoring through measures of trapped insects biomass. We advocate for more robust measures of biodiversity trends in wild bees, requiring both standardized surveys, and the identification of caught specimens down to the species level to capture the subtleties of species, traits-based and phylogeny-based community changes across habitats or time. Scaling out this approach is an essential prerequisite for more global conservation planning tailored to the ecological requirements of the targeted insect species.Nicolas J. VereeckenTimothy WeekersNicolas LeclercqStéphane De GreefHélène HainautJean-Marc MolenbergYouri MartinXavier JanssensGrégoire NoëlAlain PaulyStuart P.M. RobertsLeon MarshallElsevierarticleWild beesCommunity assemblyConservationBiomassBiodiversityEcologyQH540-549.5ENEcological Indicators, Vol 121, Iss , Pp 107132- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Wild bees Community assembly Conservation Biomass Biodiversity Ecology QH540-549.5
spellingShingle	Wild bees Community assembly Conservation Biomass Biodiversity Ecology QH540-549.5 Nicolas J. Vereecken Timothy Weekers Nicolas Leclercq Stéphane De Greef Hélène Hainaut Jean-Marc Molenberg Youri Martin Xavier Janssens Grégoire Noël Alain Pauly Stuart P.M. Roberts Leon Marshall Insect biomass is not a consistent proxy for biodiversity metrics in wild bees
description	Recent studies have reported on dramatic cases of aerial insect population declines by focusing on the measure of the total biomass of caught insects. However, there is currently no consensus about how biomass patterns among sites and habitats might consistently capture the subtleties of changes in aerial insect community structure. Here, we investigated the relationship between the total biomass of wild bees collected using pan traps in urban, agricultural, and semi-natural habitats on one hand, and a spectrum of biodiversity metrics on the other hand, particularly species richness (SR), alpha diversity, functional diversity (FD) and three different forms of phylogenetic diversity (PD). Our results indicate that although biomass is significantly and highly correlated with the abundance of wild bees, it is generally significantly but only moderately and non-linearly correlated to the various facets of wild bee diversity among habitats. By contrast, we also found that all three measures of PD used are consistent across habitats, suggesting that a taxonomic hierarchy based on Linnaean classification could be used as a proxy for the measurement of PD in wild bees, particularly in other well-studied areas such as Western Europe where a multi-gene molecular phylogeny is unavailable as yet. Collectively, our results illustrate the clear limitations of biodiversity monitoring through measures of trapped insects biomass. We advocate for more robust measures of biodiversity trends in wild bees, requiring both standardized surveys, and the identification of caught specimens down to the species level to capture the subtleties of species, traits-based and phylogeny-based community changes across habitats or time. Scaling out this approach is an essential prerequisite for more global conservation planning tailored to the ecological requirements of the targeted insect species.
format	article
author	Nicolas J. Vereecken Timothy Weekers Nicolas Leclercq Stéphane De Greef Hélène Hainaut Jean-Marc Molenberg Youri Martin Xavier Janssens Grégoire Noël Alain Pauly Stuart P.M. Roberts Leon Marshall
author_facet	Nicolas J. Vereecken Timothy Weekers Nicolas Leclercq Stéphane De Greef Hélène Hainaut Jean-Marc Molenberg Youri Martin Xavier Janssens Grégoire Noël Alain Pauly Stuart P.M. Roberts Leon Marshall
author_sort	Nicolas J. Vereecken
title	Insect biomass is not a consistent proxy for biodiversity metrics in wild bees
title_short	Insect biomass is not a consistent proxy for biodiversity metrics in wild bees
title_full	Insect biomass is not a consistent proxy for biodiversity metrics in wild bees
title_fullStr	Insect biomass is not a consistent proxy for biodiversity metrics in wild bees
title_full_unstemmed	Insect biomass is not a consistent proxy for biodiversity metrics in wild bees
title_sort	insect biomass is not a consistent proxy for biodiversity metrics in wild bees
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/6bc2216835c44a47bff028b1b5415e2e
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_version_	1718405848498176000

Insect biomass is not a consistent proxy for biodiversity metrics in wild bees

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