uu.seUppsala University Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Biotic interactions along a latitudinal gradient: Field study of the perennial herb Primula farinosa
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Biology Education Centre. Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Ecology and Genetics, Plant Ecology and Evolution. (Ågrens grupp)
2019 (English)Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
Abstract [en]

Because climatic factors may differentially limit the distribution of plants, herbivores, and pollinators, the intensity of biotic interactions is expected to vary geographically. To determine if the intensity of biotic interactions varied along a latitudinal gradient or with population size in the perennial herb Primula farinosa, 31 populations were studied across the Swedish range of the species from latitude 56°N to 63°N. Populations were visited during flowering and fruit maturation. Intensities of grazing (proportion of plants grazed), pollination (proportion of flowers initiating fruit development), seed predation (proportion of initiated fruits consumed by seed predators), and smut infection (proportion of initiated fruit infected by smut) were recorded as well as flower production and reproductive output (number of intact mature fruits). While all tested variables varied between populations, the intensities of biotic interactions were not significantly related to latitude or population size. Number of flowers produced per plant decreased with increasing latitude, whereas the proportion of flowers developing into a mature fruit tended to be higher at the ends than in the central part of the latitudinal gradient. Grazing damage was higher and fruit set (proportion of flowers developing into intact mature fruits) lower at sites exposed to domestic grazers than at sites without domestic grazers. The results suggest that while abiotic factors limit the number of flowers a plant produce and resources decrease with increasing latitude, antagonistic biotic interactions supress seed production mainly in the central part of the geographic range in Sweden. This might be explained by edge populations escaping antagonists mainly located in the centre of the species distribution.

Place, publisher, year, edition, pages
2019. , p. 19
Keywords [en]
Primula farinosa, biotic interactions, field study, Sweden, grazing, predation, pollination, temperate zone
National Category
Ecology Evolutionary Biology Botany
Identifiers
URN: urn:nbn:se:uu:diva-393578OAI: oai:DiVA.org:uu-393578DiVA, id: diva2:1354253
Educational program
Master Programme in Biology
Examiners
Available from: 2019-11-07 Created: 2019-09-24 Last updated: 2019-11-07Bibliographically approved

Open Access in DiVA

Vänner och Fiender från Norr till Söder(90 kB)6 downloads
File information
File name POPULARSUMMARY01.pdfFile size 90 kBChecksum SHA-512
29539f06ad4621d1b81f51a8fefb952ace88f8e71f0a56c703acce7fd1508ec77803f86cc07c07e07ddb2afd71ed0077314185aad0812678fed5f65c921c1f21
Type popularsummaryMimetype application/pdf

By organisation
Biology Education CentrePlant Ecology and Evolution
EcologyEvolutionary BiologyBotany

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

urn-nbn

Altmetric score

urn-nbn
Total: 67 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf