More than 75 percent decline over 27 years in total flying insect biomass in protected areas

Hallmann, Caspar A.; Sorg, Martin; Jongejans, Eelke; Siepel, H.; Hofland, Nick; Schwan, Heinz; Stenmans, Werner; Müller, Andreas; Sumser, Hubert; Hörren, Thomas; Goulson, Dave; Kroon, Hans de

doi:10.1371/journal.pone.0185809

Cited by 2,490 publications

(2,030 citation statements)

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“…Therefore, much research has been carried out on responses of bee communities to human impacts such as land‐use change and intensification. Current data suggest an overall pattern of decline in insect diversity and abundance (Hallmann et al., 2017). This decline is likely to increase the risk of future pollination deficits in areas of high and increasing pollination demands (Aizen & Harder, 2009; Lautenbach, Seppelt, Liebscher, & Dormann, 2012).…”

Section: Introductionmentioning

confidence: 99%

Impact of human disturbance on bee pollinator communities in savanna and agricultural sites in Burkina Faso, West Africa

Stein

Stenchly

Coulibaly

et al. 2018

Ecology and Evolution

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All over the world, pollinators are threatened by land‐use change involving degradation of seminatural habitats or conversion into agricultural land. Such disturbance often leads to lowered pollinator abundance and/or diversity, which might reduce crop yield in adjacent agricultural areas. For West Africa, changes in bee communities across disturbance gradients from savanna to agricultural land are mainly unknown. In this study, we monitored for the impact of human disturbance on bee communities in savanna and crop fields. We chose three savanna areas of varying disturbance intensity (low, medium, and high) in the South Sudanian zone of Burkina Faso, based on land‐use/land cover data via Landsat images, and selected nearby cotton and sesame fields. During 21 months covering two rainy and two dry seasons in 2014 and 2015, we captured bees using pan traps. Spatial and temporal patterns of bee species abundance, richness, evenness and community structure were assessed. In total, 35,469 bee specimens were caught on 12 savanna sites and 22 fields, comprising 97 species of 32 genera. Bee abundance was highest at intermediate disturbance in the rainy season. Species richness and evenness did not differ significantly. Bee communities at medium and highly disturbed savanna sites comprised only subsets of those at low disturbed sites. An across‐habitat spillover of bees (mostly abundant social bee species) from savanna into crop fields was observed during the rainy season when crops are mass‐flowering, whereas most savanna plants are not in bloom. Despite disturbance intensification, our findings suggest that wild bee communities can persist in anthropogenic landscapes and that some species even benefitted disproportionally. West African areas of crop production such as for cotton and sesame may serve as important food resources for bee species in times when resources in the savanna are scarce and receive at the same time considerable pollination service.

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Section: Introductionmentioning

confidence: 99%

Impact of human disturbance on bee pollinator communities in savanna and agricultural sites in Burkina Faso, West Africa

Stein

Stenchly

Coulibaly

et al. 2018

Ecology and Evolution

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“…cbd.int/doc/publications/cbd-ts-81-en.pdf Seitdem fließen die SEBI-Indikatoren in europä-ische, aber auch nationale und globale Strategien zur Erhaltung der Biodiversität ein und werden regelmäßig auf EU-Ebene berichtet (EEA, 2009(EEA, , 2010(EEA, , 2012. Aufgrund der breiten Anwendbarkeit der SEBI-Indikatoren können sie auch herangezogen werden, um Fortschritte bei der Erreichung der AI-CHI-Biodiversitätsziele und der 2020-Ziele der EUBiodiversitätsstrategie zu überwachen (EEA, 2012 (Sorg et al, 2013, Hallmann et al, 2017.…”

Section: Literatur Die Biologisch-ökologische Perspektive Auf Umweltunclassified

Umwelt und Gesellschaft. Herausforderung für Wissenschaft und Politik

2018

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Imprint: KIOES Opinions are published by the Commission for Interdisciplinary Ecological Studies (KIOES)of the Austrian Academy of Sciences (OeAW). KIOES publishes current opinions written, initiated or invited by KIOES related to topical subjects on an irregular basis in KIOES Opinions. The target audience includes scientists, policy makers and the public. Opinions expressed in this article are solely those of the author(s), and they do not necessarily reflect in any way those of KIOES or OeAW. More information about KIOES and download of KIOES Opinions at Langfristige Prozesse im Fokus des LernensNachhaltigkeitsorientierte Konzepte wie jenes der Planetaren Grenzen aber ebenso der ökologische Fuß-abdruck und viele andere sind problematisch, weil sie Vermächtnisse ignorieren. Das sind jene Hinterlassenschaften früherer Eingriffe, die in Zukunft ArbeitsAbbildung 2: Menschenwürdiges Leben innerhalb der planetaren Grenzen muss das soziale Fundament sichern, ohne die planetaren Grenzen zu überschreiten. Dieser erwünschte Handlungsraum ist mit dem roten Ring, dem "Doughnut" markiert. Nach Raworth, 2012. • Innerhalb der SDGs gibt es global betrachtet weit mehr positive als negative Wechselwirkungen, vor allem bei den Zielen "Keine Armut" (SDG 1), "Gesundheit und Wohlergehen" (SDG 3), "Hochwertige Bildung" (SDG 4), "Weniger Ungleichheiten" (SDG 10), "Nachhaltiger Konsum und nachhaltige Produktion" (SDG 12) und "Maßnahmen zum Klimaschutz" (SDG 13). I n k l u s i v e u n d n a c h ha ltig e ökon om is c h e E n t w i c k l u n g• Zwischen den einzelnen SDGs zeigen sich weltweit gesehen sowohl positive als auch negative Interaktionen. Die Ziele "Keine Armut" (SDG 1) und "Gesundheit und Wohlergehen" (SDG 3) besitzen eine positive Beziehung mit den meisten anderen Zielen. Die SDG "Nachhaltiger Konsum und nachhaltige Produktion" (SDG 12) sowie "Leben an Land" (SDG 15) stehen mit anderen Zielen zumeist in einem Spannungsverhältnis.• • In der Länderperspektive besitzt das Ziel "Gesundheit und Wohlergehen" (SDG 3) die meisten positiven Wechselbeziehungen mit anderen Nachhaltigkeitszielen. Der potenziell größte Positivhebel besteht dabei zwischen den Zielen "Gesundheit und Wohlergehen" und "Sauberes Wasser und Sanitäreinrichtungen" (SDG 3 und 6 https://www.springerprofessional.de/nachhaltigkeit/ressource/konsum-als-hemmschuh-fuer-nachhaltigen-fortschritt/15420090 7 https://agupubs.onlinelibrary.wiley.com/doi/epdf/10.1002/2017EF000632 6), mit einer möglichen Auswirkung auf rund 3 Milliarden Menschen.• Der größte vermeintliche Zielkonflikt besteht zwischen den Zielen "Gesundheit und Wohlergehen" und "Nachhaltiger Konsum und nachhaltige Produktion" (SDG 3 und 12 Handlungsmöglichkeiten in Sektoren der WasserwirtschaftIm Folgenden werden für die wichtigsten Sektoren der Wasserwirtschaft in Österreich mögliche Handlungsoptionen in den nächsten Jahrzehnten zusammengefasst (siehe auch ÖWAV, 2015, Blöschl et al., 2011. Der Schwerpunkt liegt dabei auf den Umgang mit Risiken auf unterschiedlichen Zeit und Raumskalen. Die Sektor...

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“…Current studies of flying insects have estimated about 75 % of biomass loss in the last twenty years in some parts of the world (e.g. Potts 2012, Schuch et al 2012, Sorg et al 2013, Ollerton et al 2014, Hallmann et al 2017. The many reasons for the observed insect decline include (1) the effect of insecticides with a special focus on neonicotinoids (e.g.…”

Section: Introductionmentioning

confidence: 99%

Insect hibernation on urban green land: a winter-adapted mowing regime as a management tool for insect conservation

Unterweger¹,

Klammer²,

Unger³

et al. 2018

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Citation: Unterweger PA, Klammer J, Unger M, Betz O (2018) Insect hibernation on urban green land: a winter-adapted mowing regime as a management tool for insect conservation. BioRisk 13: 1-29. https://doi.org/10.3897/biorisk.13.22316 AbstractInsect conservation is challenging on various ecological scales. One largely neglected aspect is the quality of undisturbed hibernation sites. This study aims to fill a lack of knowledge concerning insect hibernation on uncut meadows persisting in urban green spaces during the winter season in a middle-sized town in south Germany. During two years of sampling, 13,511 insect specimens of the orders Heteroptera, Hymenoptera, Coleoptera and Diptera were caught from their winter stands. The specimens were assigned to 120 families and 140 taxonomic species were determined from the orders Heteroptera, Coleoptera and Diptera and 324 morphotypes from the orders Hymenoptera, Coleoptera and Diptera. The data indicate the importance of winter fallows for insect hibernation. Unmown meadows offer additional plant structures in winter (flower heads, stems, tufts and leaves) that are absent from mown ones. This increased structural diversity results in both higher species diversity and numbers of insect individuals during spring emergence. The results of this study thus emphasise the value of unmown structures for insect conservation and suggest a mosaic-like cutting maintenance of meadows, way-and river-sides and other green infrastructure in both the urban area and the open landscape.

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More than 75 percent decline over 27 years in total flying insect biomass in protected areas

Cited by 2,490 publications

References 49 publications

Impact of human disturbance on bee pollinator communities in savanna and agricultural sites in Burkina Faso, West Africa

Impact of human disturbance on bee pollinator communities in savanna and agricultural sites in Burkina Faso, West Africa

Umwelt und Gesellschaft. Herausforderung für Wissenschaft und Politik

Insect hibernation on urban green land: a winter-adapted mowing regime as a management tool for insect conservation

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