Museum specimens reveal loss of pollen host plants as key factor driving wild bee decline in The Netherlands.
Jeroen Scheper,Menno Reemer,Ruud van Kats,Wim A. Ozinga,Wim A. Ozinga,Giel T. J. van der Linden,Joop H.J. Schaminée,Joop H.J. Schaminée,Henk Siepel,Henk Siepel,David Kleijn +10 more
TLDR
It is shown that decline of preferred host plant species was one of two main factors associated with bee decline, and that mitigation strategies for loss of wild bees will only be effective if they target the specific host plants of declining bee species.Abstract:
Evidence for declining populations of both wild and managed bees has raised concern about a potential global pollination crisis. Strategies to mitigate bee loss generally aim to enhance floral resources. However, we do not really know whether loss of preferred floral resources is the key driver of bee decline because accurate assessment of host plant preferences is difficult, particularly for species that have become rare. Here we examine whether population trends of wild bees in The Netherlands can be explained by trends in host plants, and how this relates to other factors such as climate change. We determined host plant preference of bee species using pollen loads on specimens in entomological collections that were collected before the onset of their decline, and used atlas data to quantify population trends of bee species and their host plants. We show that decline of preferred host plant species was one of two main factors associated with bee decline. Bee body size, the other main factor, was negatively related to population trend, which, because larger bee species have larger pollen requirements than smaller species, may also point toward food limitation as a key factor driving wild bee loss. Diet breadth and other potential factors such as length of flight period or climate change sensitivity were not important in explaining twentieth century bee population trends. These results highlight the species-specific nature of wild bee decline and indicate that mitigation strategies will only be effective if they target the specific host plants of declining species.read more
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Safeguarding pollinators and their values to human well-being
Simon G. Potts,Vera Lúcia Imperatriz-Fonseca,Hien T. Ngo,Marcelo A. Aizen,Jacobus C. Biesmeijer,Jacobus C. Biesmeijer,Tom D. Breeze,Lynn V. Dicks,Lucas Alejandro Garibaldi,Rosemary Hill,Josef Settele,Adam J. Vanbergen +11 more
TL;DR: There are well-documented declines in some wild and managed pollinators in several regions of the world, however, many effective policy and management responses can be implemented to safeguard pollinators and sustain pollination services.
Journal ArticleDOI
Delivery of crop pollination services is an insufficient argument for wild pollinator conservation
David Kleijn,Rachael Winfree,Ignasi Bartomeus,Luísa G. Carvalheiro,Luísa G. Carvalheiro,Mickaël Henry,Rufus Isaacs,Alexandra-Maria Klein,Claire Kremen,Leithen K. M'Gonigle,Romina Rader,Taylor H. Ricketts,Neal M. Williams,Nancy Lee Adamson,John S. Ascher,András Báldi,Péter Batáry,Faye Benjamin,Jacobus C. Biesmeijer,Eleanor J. Blitzer,Riccardo Bommarco,Mariëtte R. Brand,Vincent Bretagnolle,Lindsey Button,Daniel P. Cariveau,Rémy Chifflet,Jonathan F. Colville,Bryan N. Danforth,Elizabeth Elle,Michael P.D. Garratt,Felix Herzog,Andrea Holzschuh,Brad G. Howlett,Frank Jauker,Shalene Jha,Eva Knop,Kristin M. Krewenka,Violette Le Féon,Yael Mandelik,Emily A. May,Mia G. Park,Gideon Pisanty,Menno Reemer,Verena Riedinger,Orianne Rollin,Maj Rundlöf,Hillary S. Sardiñas,Jeroen Scheper,Amber R. Sciligo,Henrik G. Smith,Ingolf Steffan-Dewenter,Robbin W. Thorp,Teja Tscharntke,Jort Verhulst,Blandina Felipe Viana,Bernard E. Vaissière,Ruan Veldtman,Catrin Westphal,Simon G. Potts +58 more
TL;DR: It is shown that, while the contribution of wild bees to crop production is significant, service delivery is restricted to a limited subset of all known bee species, suggesting that cost-effective management strategies to promote crop pollination should target a different set of species than management Strategies to promote threatened bees.
Journal ArticleDOI
Non-bee insects are important contributors to global crop pollination
Romina Rader,Ignasi Bartomeus,Lucas Alejandro Garibaldi,Michael P.D. Garratt,Brad G. Howlett,Rachael Winfree,Saul A. Cunningham,Margaret M. Mayfield,Anthony D. Arthur,Georg K.S. Andersson,Riccardo Bommarco,Claire Brittain,Luísa G. Carvalheiro,Luísa G. Carvalheiro,Luísa G. Carvalheiro,Natacha P. Chacoff,Martin H. Entling,Benjamin Foully,Breno Magalhães Freitas,Barbara Gemmill-Herren,Jaboury Ghazoul,Sean R. Griffin,Caroline L. Gross,Lina Herbertsson,Felix Herzog,Juliana Hipólito,S. R. Jaggar,Frank Jauker,Alexandra-Maria Klein,David Kleijn,Smitha Krishnan,Camila Q. Lemos,Sandra Lindström,Sandra Lindström,Yael Mandelik,Yael Mandelik,Victor M. Monteiro,W.R. Nelson,Lovisa Nilsson,David E. Pattemore,Natália de Oliveira Pereira,Gideon Pisanty,Gideon Pisanty,Simon G. Potts,Menno Reemer,Maj Rundlöf,Cory S. Sheffield,Jeroen Scheper,Christof Schüepp,Christof Schüepp,Henrik G. Smith,Dara A. Stanley,Dara A. Stanley,Jane C. Stout,Hajnalka Szentgyörgyi,Hajnalka Szentgyörgyi,Hisatomo Taki,Carlos H. Vergara,Blandina Felipe Viana,Michal Woyciechowski +59 more
TL;DR: It is shown that non-bee insect pollinators play a significant role in global crop production and respond differently than bees to landscape structure, probably making their crop pollination services more robust to changes in land use.
Journal ArticleDOI
The city as a refuge for insect pollinators.
Damon M. Hall,Gerardo R. Camilo,Rebecca K. Tonietto,Jeff Ollerton,Karin Ahrné,Mike Arduser,John S. Ascher,Katherine C. R. Baldock,Robert A Fowler,Gordon W. Frankie,Dave Goulson,Bengt Gunnarsson,Mick E. Hanley,Janet Jackson,Gail A. Langellotto,David M. Lowenstein,Emily S. Minor,Stacy M. Philpott,Simon G. Potts,Muzafar Hussain Sirohi,Edward M. Spevak,Graham N. Stone,Caragh G. Threlfall +22 more
TL;DR: It is argued that pollinators put high-priority and high-impact urban conservation within reach, and transforming how environmental managers view the city can improve citizen engagement and contribute to the development of more sustainable urbanization.
Journal ArticleDOI
Historical nectar assessment reveals the fall and rise of floral resources in Britain
Mathilde Baude,Mathilde Baude,William E. Kunin,Nigel Boatman,Simon Conyers,Nancy Davies,Mark A. K. Gillespie,R. Daniel Morton,Simon M. Smart,Jane Memmott +9 more
TL;DR: It is shown that overall floral rewards can be estimated at a national scale by combining vegetation surveys and direct nectar measurements, and this national-scale assessment of floral resource provision affords new insights into the links between plant and pollinator declines, and offers considerable opportunities for conservation.
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