WFRF:(Teuber Laurenz M.)
Sökning: WFRF:(Teuber Laurenz M.) > The role of bryophy...
- Lett, SigneUmeå universitet,Institutionen för ekologi, miljö och geovetenskap,Arcum (författare)
The role of bryophytes for tree seedling responses to winter climate change : Implications for the stress gradient hypothesis
- Artikel/kapitelEngelska2018
Förlag, utgivningsår, omfång ...
- 2017-11-30
- Wiley,2018
- printrdacarrier
Nummerbeteckningar
- LIBRIS-ID:oai:DiVA.org:umu-147436
- https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-147436URI
- https://doi.org/10.1111/1365-2745.12898DOI
- https://res.slu.se/id/publ/95030URI
Kompletterande språkuppgifter
- Språk:engelska
- Sammanfattning på:engelska
Ingår i deldatabas
- SwePubSwePub
Klassifikation
Anmärkningar
- When tree seedlings establish beyond the current tree line due to climate warming, they encounter existing vegetation, such as bryophytes that often dominate in arctic and alpine tundra. The stress gradient hypothesis (SGH) predicts that plant interactions in tundra become increasingly negative as climate warms and conditions become less harsh. However, for seedlings, climate warming might not result in lower winter stress, if insulating snow cover is reduced. We aimed to understand if bryophytes facilitate seedling survival in a changing winter climate and if these effects of bryophytes on tree seedlings comply with the SGH along elevational gradients under contrasting snow conditions. In the Swedish subarctic, we transplanted intact bryophyte cores covered by each of three bryophyte species and bryophyte-free control soil from above the tree line to two field common garden sites, representing current and future tree line air temperature conditions (i.e. current tree line elevation and a lower, warmer, elevation below the tree line). We planted seedlings of Betula pubescens and Pinus sylvestris into these cores and subjected them to experimental manipulation of snow cover during one winter. In agreement with the SGH, milder conditions caused by increased snow cover enhanced the generally negative or neutral effects of bryophytes on seedlings immediately after winter. Furthermore, survival of P. sylvestris seedlings after one full year was higher at lower elevation, especially when snow cover was thinner. However, in contrast with the SGH, impacts of bryophytes on over-winter survival of seedlings did not differ between elevations, and impacts on survival of B. pubescens seedlings after 1year was more negative at lower elevation. Bryophyte species differed in their effect on seedling survival after winter, but these differences were not related to their insulating capacity.Synthesis. Our study demonstrates that interactions from bryophytes can modify the impacts of winter climate change on tree seedlings, and vice versa. These responses do not always comply with SGH, but could ultimately have consequences for large-scale ecological processes such as tree line shifts. These new insights need to be taken into account in predictions of plant species responses to climate change.
Ämnesord och genrebeteckningar
- NATURVETENSKAP Biologi Botanik hsv//swe
- NATURAL SCIENCES Biological Sciences Botany hsv//eng
- NATURVETENSKAP Biologi Ekologi hsv//swe
- NATURAL SCIENCES Biological Sciences Ecology hsv//eng
- alpine
- B
- pubescens
- climate change
- competition
- facilitation
- P
- sylvestris
- plant-plant interactions
- ow cover
- subarctic
- tree line
Biuppslag (personer, institutioner, konferenser, titlar ...)
- Wardle, DavidSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Nanyang Technological University (NTU)(Swepub:slu)49465 (författare)
- Nilsson Hegethorn, Marie-CharlotteSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management(Swepub:slu)47927 (författare)
- Teuber, Laurenz M.Umeå universitet,Institutionen för ekologi, miljö och geovetenskap(Swepub:umu)late0007 (författare)
- Dorrepaal, EllenUmeå universitet,Institutionen för ekologi, miljö och geovetenskap(Swepub:umu)eldo0004 (författare)
- Umeå universitetInstitutionen för ekologi, miljö och geovetenskap (creator_code:org_t)
- Sveriges lantbruksuniversitet
Sammanhörande titlar
- Ingår i:Journal of Ecology: Wiley106:3, s. 1142-11550022-04771365-2745
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- Dorrepaal, Ellen
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