More than 75 percent decline over 27 years in total flying insect biomass in protected areas.
Caspar A. Hallmann,Martin Sorg,Eelke Jongejans,Henk Siepel,Nick Hofland,Heinz Schwan,Werner Stenmans,Andreas Müller,Hubert Sumser,Thomas Hörren,Dave Goulson,Hans de Kroon +11 more
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This analysis estimates a seasonal decline of 76%, and mid-summer decline of 82% in flying insect biomass over the 27 years of study, and shows that this decline is apparent regardless of habitat type, while changes in weather, land use, and habitat characteristics cannot explain this overall decline.Abstract:
Global declines in insects have sparked wide interest among scientists, politicians, and the general public. Loss of insect diversity and abundance is expected to provoke cascading effects on food webs and to jeopardize ecosystem services. Our understanding of the extent and underlying causes of this decline is based on the abundance of single species or taxonomic groups only, rather than changes in insect biomass which is more relevant for ecological functioning. Here, we used a standardized protocol to measure total insect biomass using Malaise traps, deployed over 27 years in 63 nature protection areas in Germany (96 unique location-year combinations) to infer on the status and trend of local entomofauna. Our analysis estimates a seasonal decline of 76%, and mid-summer decline of 82% in flying insect biomass over the 27 years of study. We show that this decline is apparent regardless of habitat type, while changes in weather, land use, and habitat characteristics cannot explain this overall decline. This yet unrecognized loss of insect biomass must be taken into account in evaluating declines in abundance of species depending on insects as a food source, and ecosystem functioning in the European landscape.read more
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Eviter-Réduire-Compenser : d’un idéal conceptuel aux défis de mise en œuvre : une analyse pluridisciplinaire et multi-échelle
TL;DR: In this article, the authors present an analysis of the application of the sequence ERC dans le cadre de petits projets d’amenagement, identifying a serie of limites associees a l’echelle projet.
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Achteruitgang insectenpopulaties in Nederland: trends, oorzaken en kennislacunes
David Kleijn,R.J. Bink,Cajo J. F. ter Braak,Roy H. A. van Grunsven,Wim A. Ozinga,Ivo Roessink,Jeroen Scheper,A.M. Schmidt,Michiel F. Wallis de Vries,R.M.A. Wegman,Friso van der Zee,Th. Zeegers +11 more
TL;DR: Wageningen Environmental Research Postbus 47 6700 AB Wageningen T 317 48 07 00 www.wur.nl/environmental-research as mentioned in this paper ) is a group of 30 vestigingen, 5.000 medewerkers and 10.000 studenten.
Tillstånd och trender för arter och deras livsmiljöer
Karin Ahrné,Mora Aronsson,Håkan Berglund,Ulf Bjelke,Anders Dahlberg,Wenche Eide,Ulf Gärdenfors,Christina Halling,Tomas Hallingbäck,Anders Jacobson,Artur Larsson,Håkan Ljungberg,Niklas Lönnell,Kerstin Mo,Mona Johansson,Jonas Sandström,Sebastian Sundberg,Mikael Svensson,Göran Thor,Martin Tjernberg,Lena Tranvik,Eddie von Wachenfeldt +21 more
TL;DR: In this article, the IUCN has published a rodlisteindex for the svenska rodlistan in the fjarde i ordningen of Sverige.
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Species energy and Thermal Performance Theory predict 20-yr changes in ant community abundance and richness.
Michael Kaspari,Jelena Bujan,Jelena Bujan,Karl A. Roeder,Kirsten M. de Beurs,Michael D. Weiser +5 more
TL;DR: Results suggest community changes are predictable using theory from geographical ecology, and that warming can first enhance but may ultimately decrease the abundance of this important insect taxon.
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The neglected burden of agricultural intensification: a contribution to the debate on land-use change
TL;DR: Argentina lost 17% of its tree cover between 1992 and 2015 as mentioned in this paper, but net forest loss recently came to a halt, and some scholars argue that this was facilitated by indust...
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