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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Insights from regional and short-term biodiversity monitoring datasets are valuable: a reply to Daskalova et al. 2021
Sebastian Seibold,Torsten Hothorn,Martin M. Gossner,Nadja K. Simons,Nico Blüthgen,Jörg Müller,Didem Ambarlı,Didem Ambarlı,Christian Ammer,Jürgen Bauhus,Markus Fischer,Jan Christian Habel,Caterina Penone,Peter Schall,Ernst Detlef Schulze,Wolfgang W. Weisser +15 more
TL;DR: In this article, the authors explain why the criticism of missing statistical rigour in the analysis of Seibold et al. (2019) is not warranted, and they agree with Daskalova et al (2021) that the assembly and analysis of larger datasets is urgently needed, but it will take time until such datasets are available.
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Pollinator conservation in the context of global changes with a focus on France and Belgium
Bertrand Schatz,Drossart Maxime,Henry Mickael,Geslin Benoît,Allier Fabrice,Savajol Colette,Gérard Maxence,Gérard Maxence,Michez Denis +8 more
TL;DR: In this article, an updated overview of pollinator conservation globally is provided, focusing on how France and Belgium have reacted to the observed decline of pollinators, and examine their national interpretations, conservation actions and research contributions.
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Glucosinolates in Reseda lutea L.: Distribution in plant tissues during flowering time
Eleonora Pagnotta,Sabine Montaut,Roberto Matteo,Patrick Rollin,Jean-Marc Nuzillard,Luca Lazzeri,M. Bagatta +6 more
TL;DR: The data showed that the uncommon 2-(α- l -rhamnopyranosyloxy)benzyl GSL, until now identified as the main GSL in R. lutea, reached its highest content in the racemes during the full flowering stage, the most pollinator attractive phenological phase of the plant.
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Will predicted positive effects of climate change be enough to reverse declines of the regionally Endangered Natterjack toad in Ireland
Marina Reyne,Natasha E. McGowan,Jason Flanagan,Paul Nolan,Aurélie Aubry,Mark Emmerson,Ferdia Marnell,Neil Reid +7 more
TL;DR: Despite recent range contraction and population declines due to habitat deterioration, the Natterjack toad has the potential to be a climate change winner, notwithstanding unpredictable habitat and land‐use change, sea‐level rise inducing coastal erosion, changes in invertebrate prey abundance, and disease.
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A species diversity dataset of beetles by three passive acquisition methods in Tei Tong Tsai (Hong Kong)
TL;DR: In this article , the authors provided a database for the evaluation of beetle species diversity in Hong Kong and a paradigm for the effectiveness of passive acquisition in the beetle collection through the three representative methods, thus laying a foundation for biodiversity research.
References
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