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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Population decline in tree swallows (Tachycineta bicolor) linked to climate change and inclement weather on the breeding ground.
TL;DR: Overall, the results suggest tree swallows should be added to the growing list of species challenged by climate change, and that other species of aerial insect specialists may face similar impacts of climate change.
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Environmental filtering predicts plant-community trait distribution and diversity: Kettle holes as models of meta-community systems.
Sissi Lozada-Gobilard,Susanne Stang,Karin Pirhofer-Walzl,Thomas Kalettka,Thilo Heinken,Boris Schröder,Jana A. Eccard,Jasmin Joshi,Jasmin Joshi +8 more
TL;DR: Flat ephemeral kettle holes can be regarded as meta‐ecosystems that strongly depend on seed dispersal and recruitment from a seed bank, whereas neighboring permanent kettle holes have a more stable local species diversity.
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Experimental evidence for neonicotinoid driven decline in aquatic emerging insects.
S. Henrik Barmentlo,Maarten Schrama,Geert R. de Snoo,Peter M. van Bodegom,André van Nieuwenhuijzen,Martina G. Vijver +5 more
TL;DR: In this article, the authors used an outdoor experiment to determine effects of field-realistic concentrations of the commonly applied neonicotinoid thiacloprid on the emergence of naturally assembled aquatic insect populations.
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Ecotrons: powerful and versatile ecosystem analysers for ecology, agronomy and environmental science
Jacques Roy,Francois Rineau,Hans J. De Boeck,Ivan Nijs,Thomas Pütz,Samuel Abiven,Samuel Abiven,John A. Arnone,Craig V. M. Barton,Natalie Beenaerts,Nicolas Brüggemann,Matteo Dainese,Timo Domisch,Nico Eisenhauer,Sarah Garré,Alban Gebler,Andrea Ghirardo,Richard L. Jasoni,George A. Kowalchuk,Damien Landais,Stuart H Larsen,Vincent Leemans,Jean-François Le Galliard,Jean-François Le Galliard,Bernard Longdoz,Florent Massol,Teis Nørgaard Mikkelsen,Georg Niedrist,Clément Piel,Olivier Ravel,Joana Sauze,Anja Schmidt,Jörg-Peter Schnitzler,Leonardo H. Teixeira,Mark G. Tjoelker,Wolfgang W. Weisser,J. Barbro Winkler,Alexandru Milcu +37 more
TL;DR: How the methodology for environmental simulation and process measurements, especially in soil, can be improved and the need to establish stronger links with modelling in future projects is discussed.
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Towards a better understanding of values in sustainability transformations: ethical perspectives on landscape stewardship
TL;DR: In this article, the authors explore what kinds of values guide thinking and action in the context of car sustainability transformations, and what kind of values are considered an essential but ill-defined element in sustainability transformations.
References
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