Species richness of wild bees, but not the use of managed honeybees, increases fruit set of a pollinator‐dependent crop

Journal of Applied Ecology - Tập 52 Số 2 - Trang 323-330 - 2015
Rachel E. Mallinger1, Claudio Gratton1
1Department of Entomology University of Wisconsin Madison 1552 University Ave Madison WI 53726 USA

Tóm tắt

Summary Native, wild bees are important pollinators for both crop and wild plants. With concerns over the availability and cost of managed honeybees, attention has turned to native, wild bees as crop pollinators. However, the ability of native, wild bees to provide sufficient pollination may depend on their populations at local scales. Therefore, at the farm scale, we examined the pollination contribution of both native, wild bees and managed honeybees to apples and assessed the relative importance of bee abundance vs. species richness. Over three growing seasons, apple fruit set, bee abundance and bee species richness were measured at orchards in Wisconsin, half of which used managed honeybees, thus allowing us to independently examine the contribution of native, wild bees to fruit set. We additionally conducted observations of honeybees and wild bees foraging on apple blossoms in order to examine functional complementarity. We found that apples are highly dependent on animal pollinators. However, fruit set was not significantly higher at orchards with managed honeybees, nor did it increase with the number of honeybees per orchard. Instead, fruit set significantly increased with the species richness of native, wild bees during bloom. Honeybees and wild bees showed different foraging preferences: honeybees more frequently visited apple flowers on densely blooming trees, while wild bees showed no preference for floral density, thereby evenly visiting trees throughout the orchard. Synthesis and applications. Our results show that native, wild bees play a significant and unique role in apple pollination within our region and cannot therefore be replaced by managed bees. Moreover, our findings suggest that bee conservation efforts should focus specifically on maintaining or increasing bee species richness in order to improve pollination and crop yields.

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Tài liệu tham khảo

10.1016/j.cub.2009.03.071

10.1111/ele.12170

Bekey R.S., 1981, Pollination and Fruit Set of Apple

10.1080/00221589.1983.11515130

10.1371/journal.pone.0082996

10.1111/gcb.12043

10.1098/rspb.2012.2767

10.1073/pnas.1307438110

10.1126/science.1232728

10.1111/j.1365-2664.2010.01829.x

10.1007/BF00328586

10.1093/ee/15.3.723

10.1079/9780851994482.0000

10.1371/journal.pone.0021363

10.1016/j.jip.2009.06.011

10.1086/666610

ESRI (Environmental Systems Resource Institute), 2009, ArcMap 9.2

10.1890/12-1620.1

10.1016/j.ecolecon.2008.06.014

10.1664/0028-7199(2006)114[86:NOTNBP]2.0.CO;2

10.1126/science.1230200

10.26786/1920-7603(2014)8

10.1111/j.1365-2745.2010.01691.x

10.1073/pnas.0600929103

10.1007/s00442-007-0752-9

10.1098/rspb.2008.0405

10.1111/j.1600-0706.2009.17523.x

10.1017/S026646740800566X

10.2307/2402168

10.2307/2402306

10.1098/rspb.2002.2306

10.1098/rspb.2006.3721

10.1073/pnas.262413599

Larsen H.J.(2010)Evaluating tree fruit bud & fruit damage from cold. Colorado State University Extension. Accessed online:http://www.ext.colostate.edu/pubs/garden/07426.html. 20 June 2014.

Levene H., 1960, Contributions to Probability and Statistics, 278

Longstroth M.(2005)Assessing frost damage to apple buds flowers fruits and trees. Minnesota Fruit and Vegetable IPM News. Accessed online:http://www.vegedge.umn.edu/MNFruit&VegNews/Vol2/516frost.htm. 20 June 2014.

Mallinger R.&Gratton C.(2014)Data from “Species richness of wild bees but not the use of managed bees increases fruit set of a pollinator‐dependent crop” Dryad http://dx.doi.org/10.5061/dryad.t75c4

10.1080/14620316.2004.11511787

National Research Council, 2007, Status of Pollinators in North America

Parker F.D., 1987, New pollinators for our crops, Agricultural Zoology Reviews, 2, 279

10.1016/j.tree.2010.01.007

10.1111/j.1365-2664.2011.02066.x

Schneider D., 2005, A comparison between semi‐ and fully compatible apple pollinators grown under suboptimal pollination conditions, HortScience, 40, 1280, 10.21273/HORTSCI.40.5.1280

10.4039/Ent119735-7

10.1098/rspb.2002.2292

10.1007/s004420050949

10.1046/j.1365-2664.2001.00657.x

10.1603/0046-225X-29.3.413

10.1603/EN10231

10.1098/rspb.2008.0709

10.1111/j.1461-0248.2007.01110.x

10.1016/j.agee.2013.03.005

10.1016/j.agee.2012.06.020