Seasonal variation in exploitative competition between honeybees and bumblebees
Honeybees (Apis mellifera) and bumblebees (Bombus spp.) often undergo exploitative competition for shared floral resources, which can alter their foraging behaviour and flower choice, even causing competitive exclusion. This may be strongest in summer, when foraging conditions are most challenging f...
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description | Honeybees (Apis mellifera) and bumblebees (Bombus spp.) often undergo exploitative competition for shared floral resources, which can alter their foraging behaviour and flower choice, even causing competitive exclusion. This may be strongest in summer, when foraging conditions are most challenging for bees, compared to other times of the year. However, the seasonal dynamics of competition between these major pollinator groups are not well understood. Here, we investigate whether the strength of exploitative competition for nectar between honeybees and bumblebees varies seasonally, and whether competitive pressure is greatest in summer months. We carried out experimental bee exclusion trials from May to late September, using experimental patches of lavender, variety Grosso, in full bloom. In each trial, we compared the numbers of honeybees (HB) foraging on patches from which bumblebees had been manually excluded (bumblebee excluded, BBE) versus control (CON) patches, HB(BBE-CON). This measure of exploitative competition varied significantly with season. As expected, mean HB(BBE-CON) was significantly greater in summer trials than in spring or autumn trials. This was despite high nectar standing crop volumes in BBE patch flowers in spring and autumn trials. Mean HB(BBE-CON) was not different between spring and autumn trials. Our results show that nectar competition between honeybees and bumblebees varies seasonally and is stronger in summer than spring or autumn, adding to current understanding of the seasonality of resource demand and competition between bee species. This information may also help to inform conservation programs aiming to increase floral resources for bees by showing when these resources are most needed. |
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W.</creator><creatorcontrib>Wignall, Veronica R. ; Harry, Isabella Campbell ; Davies, Natasha L. ; Kenny, Stephen D. ; McMinn, Jack K. ; Ratnieks, Francis L. W.</creatorcontrib><description>Honeybees (Apis mellifera) and bumblebees (Bombus spp.) often undergo exploitative competition for shared floral resources, which can alter their foraging behaviour and flower choice, even causing competitive exclusion. This may be strongest in summer, when foraging conditions are most challenging for bees, compared to other times of the year. However, the seasonal dynamics of competition between these major pollinator groups are not well understood. Here, we investigate whether the strength of exploitative competition for nectar between honeybees and bumblebees varies seasonally, and whether competitive pressure is greatest in summer months. We carried out experimental bee exclusion trials from May to late September, using experimental patches of lavender, variety Grosso, in full bloom. In each trial, we compared the numbers of honeybees (HB) foraging on patches from which bumblebees had been manually excluded (bumblebee excluded, BBE) versus control (CON) patches, HB(BBE-CON). This measure of exploitative competition varied significantly with season. As expected, mean HB(BBE-CON) was significantly greater in summer trials than in spring or autumn trials. This was despite high nectar standing crop volumes in BBE patch flowers in spring and autumn trials. Mean HB(BBE-CON) was not different between spring and autumn trials. Our results show that nectar competition between honeybees and bumblebees varies seasonally and is stronger in summer than spring or autumn, adding to current understanding of the seasonality of resource demand and competition between bee species. 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All Rights Reserved. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c696t-533fa112ecfadb8340d13ad44af2e0bbdffc80f3b2a437e0c54baae06560c5693</citedby><cites>FETCH-LOGICAL-c696t-533fa112ecfadb8340d13ad44af2e0bbdffc80f3b2a437e0c54baae06560c5693</cites><orcidid>0000-0001-9411-1198</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/48695862$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/48695862$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>230,314,776,780,799,881,27901,27902,41464,42533,51294,57992,58225</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/31840190$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Wignall, Veronica R.</creatorcontrib><creatorcontrib>Harry, Isabella Campbell</creatorcontrib><creatorcontrib>Davies, Natasha L.</creatorcontrib><creatorcontrib>Kenny, Stephen D.</creatorcontrib><creatorcontrib>McMinn, Jack K.</creatorcontrib><creatorcontrib>Ratnieks, Francis L. W.</creatorcontrib><title>Seasonal variation in exploitative competition between honeybees and bumblebees</title><title>Oecologia</title><addtitle>Oecologia</addtitle><addtitle>Oecologia</addtitle><description>Honeybees (Apis mellifera) and bumblebees (Bombus spp.) often undergo exploitative competition for shared floral resources, which can alter their foraging behaviour and flower choice, even causing competitive exclusion. This may be strongest in summer, when foraging conditions are most challenging for bees, compared to other times of the year. However, the seasonal dynamics of competition between these major pollinator groups are not well understood. Here, we investigate whether the strength of exploitative competition for nectar between honeybees and bumblebees varies seasonally, and whether competitive pressure is greatest in summer months. We carried out experimental bee exclusion trials from May to late September, using experimental patches of lavender, variety Grosso, in full bloom. In each trial, we compared the numbers of honeybees (HB) foraging on patches from which bumblebees had been manually excluded (bumblebee excluded, BBE) versus control (CON) patches, HB(BBE-CON). This measure of exploitative competition varied significantly with season. As expected, mean HB(BBE-CON) was significantly greater in summer trials than in spring or autumn trials. This was despite high nectar standing crop volumes in BBE patch flowers in spring and autumn trials. Mean HB(BBE-CON) was not different between spring and autumn trials. Our results show that nectar competition between honeybees and bumblebees varies seasonally and is stronger in summer than spring or autumn, adding to current understanding of the seasonality of resource demand and competition between bee species. This information may also help to inform conservation programs aiming to increase floral resources for bees by showing when these resources are most needed.</description><subject>Animals</subject><subject>Apis mellifera</subject><subject>Autumn</subject><subject>Bees</subject><subject>BEHAVIORAL ECOLOGY - ORIGINAL RESEARCH</subject><subject>Biological competition</subject><subject>Biomedical and Life Sciences</subject><subject>Blooms</subject><subject>Bombus</subject><subject>Bumblebees</subject><subject>Climate</subject><subject>Competition</subject><subject>competitive exclusion</subject><subject>Ecology</subject><subject>Exploitation</subject><subject>Feeding Behavior</subject><subject>flowering</subject><subject>Flowers</subject><subject>Foraging</subject><subject>Foraging behavior</subject><subject>Honeybee</subject><subject>Hydrology/Water Resources</subject><subject>Lavandula</subject><subject>Life Sciences</subject><subject>Nectar</subject><subject>Patches (structures)</subject><subject>Plant Nectar</subject><subject>Plant Sciences</subject><subject>Pollinators</subject><subject>Resource conservation</subject><subject>Resources</subject><subject>Seasonal variation</subject><subject>Seasonal variations</subject><subject>Seasonality</subject><subject>Seasons</subject><subject>Spring</subject><subject>Spring (season)</subject><subject>Standing crop</subject><subject>Summer</subject><issn>0029-8549</issn><issn>1432-1939</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>C6C</sourceid><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><recordid>eNqFkktv1DAUhS0EokPhDyCBIrGBRcr1M8kGqap4VKpUicLacpKbqUeJPcTOTPvvcTplyiAEyiKx73eO7JNDyEsKJxSgeB8AhGA50CoHIQuVbx-RBRWc5bTi1WOyAGBVXkpRHZFnIawAqKBSPiVHnJYiyWBBLq_QBO9Mn23MaE203mXWZXiz7r2Nab3BrPHDGqO9m9UYt4guu_YOb2vEkBnXZvU01D3Oy-fkSWf6gC_u38fk-6eP386-5BeXn8_PTi_yRlUq5pLzzlDKsOlMW5dcQEu5aYUwHUOo67brmhI6XjMjeIHQSFEbg6CkSt-q4sfkw853PdUDtg26OJper0c7mPFWe2P14cTZa730G12kUIRiyeDtvcHof0wYoh5saLDvjUM_Bc2kTAFVspD_RzkreFGWiif0zR_oyk9jinemJOUlBwUP1NL0qK3rfDpiM5vqU0W5ZKqoZq-Tv1DpaXGwTcq_s2n_QPDuQJCYiDdxaaYQ9PnV10OW7dhm9CGM2O2jo6Dnduldu3Sqib5rl94m0evfQ99LftUpAXwHhDRySxwfrv9P21c71SpEP-5dRakqWaZf9RPJH-QZ</recordid><startdate>20200201</startdate><enddate>20200201</enddate><creator>Wignall, Veronica R.</creator><creator>Harry, Isabella Campbell</creator><creator>Davies, Natasha L.</creator><creator>Kenny, Stephen D.</creator><creator>McMinn, Jack K.</creator><creator>Ratnieks, Francis L. 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W.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Seasonal variation in exploitative competition between honeybees and bumblebees</atitle><jtitle>Oecologia</jtitle><stitle>Oecologia</stitle><addtitle>Oecologia</addtitle><date>2020-02-01</date><risdate>2020</risdate><volume>192</volume><issue>2</issue><spage>351</spage><epage>361</epage><pages>351-361</pages><issn>0029-8549</issn><eissn>1432-1939</eissn><abstract>Honeybees (Apis mellifera) and bumblebees (Bombus spp.) often undergo exploitative competition for shared floral resources, which can alter their foraging behaviour and flower choice, even causing competitive exclusion. This may be strongest in summer, when foraging conditions are most challenging for bees, compared to other times of the year. However, the seasonal dynamics of competition between these major pollinator groups are not well understood. Here, we investigate whether the strength of exploitative competition for nectar between honeybees and bumblebees varies seasonally, and whether competitive pressure is greatest in summer months. We carried out experimental bee exclusion trials from May to late September, using experimental patches of lavender, variety Grosso, in full bloom. In each trial, we compared the numbers of honeybees (HB) foraging on patches from which bumblebees had been manually excluded (bumblebee excluded, BBE) versus control (CON) patches, HB(BBE-CON). This measure of exploitative competition varied significantly with season. As expected, mean HB(BBE-CON) was significantly greater in summer trials than in spring or autumn trials. This was despite high nectar standing crop volumes in BBE patch flowers in spring and autumn trials. Mean HB(BBE-CON) was not different between spring and autumn trials. Our results show that nectar competition between honeybees and bumblebees varies seasonally and is stronger in summer than spring or autumn, adding to current understanding of the seasonality of resource demand and competition between bee species. This information may also help to inform conservation programs aiming to increase floral resources for bees by showing when these resources are most needed.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Science + Business Media</pub><pmid>31840190</pmid><doi>10.1007/s00442-019-04576-w</doi><tpages>11</tpages><orcidid>https://orcid.org/0000-0001-9411-1198</orcidid><oa>free_for_read</oa></addata></record> |
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subjects | Animals Apis mellifera Autumn Bees BEHAVIORAL ECOLOGY - ORIGINAL RESEARCH Biological competition Biomedical and Life Sciences Blooms Bombus Bumblebees Climate Competition competitive exclusion Ecology Exploitation Feeding Behavior flowering Flowers Foraging Foraging behavior Honeybee Hydrology/Water Resources Lavandula Life Sciences Nectar Patches (structures) Plant Nectar Plant Sciences Pollinators Resource conservation Resources Seasonal variation Seasonal variations Seasonality Seasons Spring Spring (season) Standing crop Summer |
title | Seasonal variation in exploitative competition between honeybees and bumblebees |
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