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How do bryophytes govern generative recruitment of vascular plants?
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2011 (English)In: New Phytologist, ISSN 0028-646X, E-ISSN 1469-8137, Vol. 190, no 4, 1019-1031 p.Article in journal (Refereed) Published
Abstract [en]

• Interactions between vascular plants and bryophytes determine plant community composition in many ecosystems. Yet, little is known about the importance of interspecific differences between bryophytes with respect to their effects on vascular plants. We compared the extent to which species-specific bryophyte effects on vascular plant generative recruitment depend on the following underlying mechanisms: allelopathy, mechanical obstruction, soil moisture and temperature control. • We sowed 10 vascular plant species into monospecific mats of six chemically and structurally diverse bryophytes, and examined 1-yr seedling recruitment. Allelopathic effects were also assessed in a laboratory phyto-assay. • Although all bryophytes suppressed vascular plant regeneration, there were significant differences between the bryophyte species. The lack of interactions indicated the absence of species-specific adaptations of vascular plants for recruitment in bryophyte mats. Differences between bryophyte species were best explained by alterations in temperature regime under bryophyte mats, mostly by reduced temperature amplitudes during germination. The temperature regime under bryophyte mats was well predicted by species-specific bryophyte cushion thickness. The fitness of established seedlings was not affected by the presence of bryophytes. • Our results suggest that climatically or anthropogenically driven changes in the species' composition of bryophyte communities have knock-on effects on vascular plant populations via generative reproduction.

Place, publisher, year, edition, pages
Wiley , 2011. Vol. 190, no 4, 1019-1031 p.
Keyword [en]
allelopathy, bryophyte, generative recruitment, germination, moisture, plant–plant interaction, seedling, temperature
URN: urn:nbn:se:umu:diva-43970DOI: 10.1111/j.1469-8137.2011.03644.xPubMedID: 21342202OAI: diva2:417449
Available from: 2011-05-17 Created: 2011-05-17 Last updated: 2016-06-22Bibliographically approved

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Milbau, Ann
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Department of Ecology and Environmental Sciences
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