Revisiting global trends in freshwater insect biodiversity

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Jähnig SC, Baranov V, Altermatt F, et al. Revisiting global trends in freshwater insect biodiversity. WIREs Water. 2021;8:e1506. https://doi.org/10.1002/wat2.1506

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Title: Revisiting global trends in freshwater insect biodiversity
Author: Jähnig, Sonja C.; Baranov, Viktor; Altermatt, Florian; Cranston, Peter; Friedrichs-Manthey, Martin; Geist, Juergen; He, Fengzhi; Heino, Jani; Hering, Daniel; Hölker, Franz; Jourdan, Jonas; Kalinkat, Gregor; Kiesel, Jens; Leese, Florian; Maasri, Alain; Monaghan, Michael T.; Schäfer, Ralf B.; Tockner, Klement; Tonkin, Jonathan D.; Domisch, Sami
Publisher: Wiley
Date: 2020
Language: en
Belongs to series: WIREs Water 8 (2020)
ISSN: 2049-1948
DOI: https://doi.org/10.1002/wat2.1506
URI: http://hdl.handle.net/10138/336136
Abstract: A recent global meta-analysis reported a decrease in terrestrial but increase in freshwater insect abundance and biomass (van Klink et al., Science 368, p. 417). The authors suggested that water quality has been improving, thereby challenging recent reports documenting drastic global declines in freshwater biodiversity. We raise two major concerns with the meta-analysis and suggest that these account for the discrepancy with the declines reported elsewhere. First, total abundance and biomass alone are poor indicators of the status of freshwater insect assemblages, and the observed differences may well have been driven by the replacement of sensitive species with tolerant ones. Second, many of the datasets poorly represent global trends and reflect responses tolocal conditions or nonrandom site selection. We conclude that the results of the meta-analysis should not be considered indicative of an overall improve ment in the condition of freshwater ecosystems.
Subject: freshwater ecosystems
insect abundance
long-term research
threats
global trends
freshwater
insect biodiversity
insects
meta-analysis
decrease
terrestrial
abundance
biomass
water quality
decline
global decline
biodiversity
discrepancy
indicators
criticism
insect assemblages
differences
sensitive species
tolerant species
dataset
global trends
sites
Water and Life
Conservation, Management, and Awareness
Subject (ysa): makean veden ekosysteemi
hyönteisten määrä
pitkäaikainen tutkimus
uhat
globaalit trendit
makea vesi
hyönteisten biodiversiteetti
hyönteiset
meta-analyysi
väheneminen
terrestrinen
biomassa
vedenlaatu
väheneminen
globaali väheneminen
biodiversiteetti
eroavuus
indikaattorit
kritiikki
eroavuudet
uhanalaiset lajit
datasetit
havaintopaikat
Rights: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.


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