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Pollination failure in traditionally managed hay meadows of low quality: Comparing two different pollination strategies
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Biology Education Centre.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Today traditionally managed wooded hay meadows only exist in small fractions of their former distributions. Because of the fragmentation and degeneration of hay meadows and the fact that pollinating insect diversity and abundance also are declining, pollination services in these habitats requires attention. To examine the pollination services in traditionally managed hay meadows I collected Ranunculus acris (Buttercup) in 20 meadows of varying quality on Gotland and evaluated the mean seed set and mean number of produced seeds per plant. I also collected Filipendula vulgaris (Dropwort) in 18 meadows and evaluated the mean seed set to be able to compare the pollination success of the insect pollinated R. acris with the wind pollinated F. vulgaris. A range of habitat variables were collected in the meadows and in older surveys to examine their relative impact on seed set. I found significantly higher seed set for R. acris in the meadows with higher habitat quality, than in meadows with lower quality. In contrast seed set in F. vulgaris was not related to habitat quality. The population density also seemed to play an important role in fertilization rate for R. acris, through increased seed set in high density areas, while plant height was positively correlated with number of produced seeds. For F. vulgaris seed set was positively correlated with moss cover, and number of seeds per plant was positively correlated with population density. These results suggest that reproductive success among insect pollinated plants are more sensitive to habitat degeneration than among wind pollinated plants. The status of pollination services in traditionally managed wooded hay meadows should be evaluated further.

Place, publisher, year, edition, pages
2012. , 22 p.
Keyword [en]
Pollination, pollen limitation, hay meadow, habitat fragmentation, seed set, habitat quality, pollination strategies
National Category
Ecology
Identifiers
URN: urn:nbn:se:uu:diva-182204OAI: oai:DiVA.org:uu-182204DiVA: diva2:558822
Educational program
Master Programme in Biology
Uppsok
Life Earth Science
Supervisors
Examiners
Available from: 2013-01-22 Created: 2012-10-05 Last updated: 2013-01-22Bibliographically approved

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Plant Ecology and EvolutionBiology Education Centre
Ecology

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CiteExportLink to record
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Citation style
  • apa
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