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Urban gardens promote bee foraging over natural habitats and plantations

Please always quote using this URN: urn:nbn:de:bvb:20-opus-162713
  • Increasing human land use for agriculture and housing leads to the loss of natural habitat and to widespread declines in wild bees. Bee foraging dynamics and fitness depend on the availability of resources in the surrounding landscape, but how precisely landscape related resource differences affect bee foraging patterns remains unclear. To investigate how landscape and its interaction with season and weather drive foraging and resource intake in social bees, we experimentally compared foraging activity, the allocation of foragers to differentIncreasing human land use for agriculture and housing leads to the loss of natural habitat and to widespread declines in wild bees. Bee foraging dynamics and fitness depend on the availability of resources in the surrounding landscape, but how precisely landscape related resource differences affect bee foraging patterns remains unclear. To investigate how landscape and its interaction with season and weather drive foraging and resource intake in social bees, we experimentally compared foraging activity, the allocation of foragers to different resources (pollen, nectar, and resin) and overall resource intake in the Australian stingless bee Tetragonula carbonaria (Apidae, Meliponini). Bee colonies were monitored in different seasons over two years. We compared foraging patterns and resource intake between the bees' natural habitat (forests) and two landscapes differently altered by humans (suburban gardens and agricultural macadamia plantations). We found foraging activity as well as pollen and nectar forager numbers to be highest in suburban gardens, intermediate in forests and low in plantations. Foraging patterns further differed between seasons, but seasonal variations strongly differed between landscapes. Sugar and pollen intake was low in plantations, but contrary with our predictions, it was even higher in gardens than in forests. In contrast, resin intake was similar across landscapes. Consequently, differences in resource availability between natural and altered landscapes strongly affect foraging patterns and thus resource intake in social bees. While agricultural monocultures largely reduce foraging success, suburban gardens can increase resource intake well above rates found in natural habitats of bees, indicating that human activities can both decrease and increase the availability of resources in a landscape and thus reduce or enhance bee fitness.show moreshow less

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Metadaten
Author: Benjamin F. Kaluza, Helen Wallace, Tim A. Heard, Aelxandra-Maria Klein, Sara D. Leonhardt
URN:urn:nbn:de:bvb:20-opus-162713
Document Type:Journal article
Faculties:Fakultät für Biologie / Theodor-Boveri-Institut für Biowissenschaften
Language:English
Parent Title (English):Ecology and Evolution
Year of Completion:2016
Volume:6
Issue:5
Pagenumber:1304-1316
Source:Ecology and Evolution 2016; 6(5): 1304– 1316. doi: 10.1002/ece3.1941
DOI:https://doi.org/10.1002/ece3.1941
Pubmed Id:http://www.ncbi.nlm.nih.gov/pubmed?term=PMC4730924
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 59 Tiere (Zoologie) / 595 Arthropoden (Gliederfüßer)
Tag:anthropogenic activities; climate factors; meliponines; resource availability; urbanization
Release Date:2018/08/22
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung