Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • 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
An investigation into trait differentiation within and between two closely related Silene species.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Biology Education Centre.
2017 (English)Independent thesis Advanced level (degree of Master (Two Years)), 30 credits / 45 HE creditsStudent thesis
Abstract [en]

Ecological differentiation and adaptation are processes that can drive divergence and speciation. Measuring ecologically revenant traits can help to identify possible targets of natural selection that may have mediated ecological differentiation. This study looked for evidence of within and between species differentiation in seven ecologically relevant traits in two closely related species sampled across their range, and whether any of these traits were related to climate differences among site of origin.

We measured seven traits under common garden conditions in seedlings of Silene dioica (11 populations, n=528) and Silene latifolia (14 populations, n=672) grown in the botanical garden in Uppsala in a randomised block design. Three traits related to leaf morphology were measured, and four related to water usage of the plant were measured. These traits were analysed for differences between the species as well as for differences within each species between populations using a linear mixed model. The traits’ relationship to a climate variable, derived from the axes of a principal components analysis of climate data for each site, was investigated using a linear model.

A number of drought avoidance (e.g. succulence, max turgid weight) and morphological traits (e.g. leaf ratio) differed between the two species. Water use efficiency has been flagged before as possibly driving ecological differentiation between the two species and the results identify possible candidate traits for quantifying this separation. Differentiation between populations within each species was also present in two traits within S. latifolia and in four traits within S. dioica significantly varying between the populations. This could reflect either local adaptation or genetic drift acting on populations across the range. One trait related to the amount of water taken up by the leaf (wgain) was found to be significantly associated with the climate variable, which was extracted from the principal components analysis, in S. latifolia.

The results identified a number of candidate traits which could reflect ecological differences between the species especially with respect to water relations. These traits may allow the species to respond differently during periods of water stress, which in turn could result in ecological separation of the species and determine their geographical ranges. 

Place, publisher, year, edition, pages
2017. , p. 40
Keywords [en]
Silene, speciation, ecological differentiation
National Category
Ecology
Identifiers
URN: urn:nbn:se:uu:diva-332293OAI: oai:DiVA.org:uu-332293DiVA, id: diva2:1152911
Educational program
Master Programme in Biology
Supervisors
Examiners
Available from: 2018-03-01 Created: 2017-10-26 Last updated: 2018-03-01Bibliographically approved

Open Access in DiVA

fulltext(1795 kB)28 downloads
File information
File name FULLTEXT01.pdfFile size 1795 kBChecksum SHA-512
f1bcb130fa0751d7a058a7cc7e41d9e42f22c4fc159ecfe6a47c7068ef5fa2c03357c46ef82d85f5b79175fa4f9083b2829bbebaecdd233aee13f413b2d217b5
Type fulltextMimetype application/pdf

By organisation
Biology Education Centre
Ecology

Search outside of DiVA

GoogleGoogle Scholar
Total: 28 downloads
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: 79 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • 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