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Response to simulated climatic change in an alpine and subarctic pollen-risk strategist, Silene acaulis
Göteborgs Universitet.
1997 (English)In: Global Change Biology, ISSN 1354-1013, E-ISSN 1365-2486, Vol. 3, 74-79 p.Article in journal (Refereed) Published
Abstract [en]

The aim of this study was to test if early no overing species respond with increased seed production to climate warming as is predicted for late-flowering seed-risk strategists. Experimental climate warming of about 3 degrees C was applied to two populations of the cushion-forming plant Silene acaulis (L.) Jacq. The experiment was run at one subarctic site and one alpine site for 2 years and 1 year, respectively, using open-top chambers (OTC). The 2-year temperature enhancement at the subarctic site had a marked effect on the flowering phenology. Cushions inside the OTC started flowering substantially earlier than control cushions. Both the male and female phases developed faster in the OTCs, and maturation of capsules occurred earlier. The cushions also responded positively in reproductive terms and produced more mature seeds and had a higher seed/ovule ratio. After 1 year temperature enhancement at the alpine site there was a weak trend for earlier flowering, but there was no significant difference in seed production or seed/ovule ratio.

Place, publisher, year, edition, pages
1997. Vol. 3, 74-79 p.
Keyword [en]
climate change, Silene acaulis, reproductive biology, ITEX, subarctic, alpine
URN: urn:nbn:se:uu:diva-202957ISI: 000071285300008OAI: oai:DiVA.org:uu-202957DiVA: diva2:634557
Available from: 2010-09-08 Created: 2013-07-01 Last updated: 2013-07-01Bibliographically approved

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