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What impact does wood type have on solitary bees’ nesting preference around Trönningeån drainage area, Halmstad?
Halmstad University, School of Business, Innovation and Sustainability.
2021 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

The loss of pollinators, including solitary bee families Megachilidae, Colletidae and Apidae is evident all over Europe. The loss in suitable nesting opportunities due to human habitat destruction is one cause and this study was made to see what type of wood was most suitable as nest sites to see the increase of solitary bees in Trönninge, Halmstad. The result shows that of the 12 taxonomic groups, 3 were specialists. Eumenidae, Heriades truncorum and H. crenulatus were found significantly more often in ash (Fraxinus excelsior) than in the other deciduous- and coniferous wood types. While Osmia caerulescens and O. leaiana significantly prefered poplar (Populus sp.). Both wood types are known to be good for biodiversity but are declining in volume because of ash dieback (Hymenoscyphus fraxineus). Dieback of poplar has also been seen in Europe. The other species within the taxonomic groups of wild bees were generalists, but this study still shows that deciduous trees were more suitable for nesting than conifer tree types. 

Abstract [sv]

Minskningen av pollinatörer, inräknat solitärbifamiljerna Megachilidae, Colletidae och Apidae, har visats för hela Europa. Saknaden av bra boplatser på grund av mänsklig habitatförstörelse är en anledning och denna studie var gjord för att se vilket typ av virke som är mest lämplig som boplats, för att se en ökning av solitära bin i Trönninge, Halmstad. Resultatet visar att av 12 taxonomiska grupper 3 var specialister. Eumenidae, Heriades truncorum och H. crenulatus var signifikant mer funna i ask (Fraxinus excelsior) än andra löv- och barrträdsarter. Medan Osmia caerulescens och O. leaina signifikant föredrog poppel (Populus sp.). Bägge trädarter är kända för att vara bra för biodiversiteten men minskar numera på grund av sjukdomen askskottsjuka (Hymenoscyphus fraxineus). Dödlighet hos poppel har också noterats i Europa. De andra arterna inom de taxonomiska grupperna av vilda bin är generalister men studien visar att lövträd är föredras som boplatser framför barrträd.

Place, publisher, year, edition, pages
2021. , p. 20
Keywords [en]
solitary bee, wood type, ash, poplar, Sweden, Halmstad, Megachilidae, Collertidae, Apidae, ash dieback, Eumenidae, Heriades, Osmia, pollinators
Keywords [sv]
solitärt bi, trätyp, ask, poppel, Sverige, Halmstad, Megachilidae, Colletidae, Apidae, askskottsjuka, Eumenidae, Heriades, Osmia, pollinatörer
National Category
Ecology
Identifiers
URN: urn:nbn:se:hh:diva-45819OAI: oai:DiVA.org:hh-45819DiVA, id: diva2:1608638
External cooperation
Hushållningssällskapet, Halland
Educational program
Conservation and Diversity, 180 credits
Supervisors
Examiners
Available from: 2021-11-04 Created: 2021-11-04 Last updated: 2021-11-04Bibliographically approved

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CiteExportLink to record
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