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Species-specific ac...
Species-specific activation time-lags can explain habitat restrictions in hydrophiclic lichens
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- Lidén, Marlene (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Enheten för skoglig fältforskning,Institutionen för skogens ekologi och skötsel,Unit for Field-based Forest Research,Department of Forest Ecology and Management
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- Jonsson Čabrajić, Anna V (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Ottosson Löfvenius, Mikaell (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Enheten för skoglig fältforskning,Institutionen för skogens ekologi och skötsel,Unit for Field-based Forest Research,Department of Forest Ecology and Management
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- Palmqvist, Kristin (author)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Lundmark, Tomas (author)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Enheten för skoglig fältforskning,Institutionen för skogens ekologi och skötsel,Unit for Field-based Forest Research,Department of Forest Ecology and Management
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(creator_code:org_t)
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- Wiley, 2010
- 2010
- English.
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In: Plant, Cell and Environment. - : Wiley. - 0140-7791 .- 1365-3040. ; 33, s. 851-862
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Abstract
Subject headings
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- Photosystem II (PSII) activation after hydration with water or humid air was measured in four hydrophilic and a generalist lichen to test the hypothesis that slow activation might explain habitat restriction in the former group. For the hydrophilic species, activation was after 4 h nearly completed in Lobaria amplissima and Platismatia norvegica, while only c. 50% for Bryoria bicolor and Usnea longissima. The generalist Platismatia glauca was activated instantaneously. The effect of this on lichen field performance was investigated using a dynamic model separating the two water sources rain and humid air. Model simulations were made using the species-specific characteristics and climate data from 12 stream microhabitats. For U. longissima, slow PSII activation could reduce realized photosynthesis by a factor of five. Bryoria bicolor was almost as severely affected, while P. norvegica displayed moderate reductions. Lobaria amplissima displayed longer realized activity periods even in unfavourable microclimates, possibly because of a higher water loss resistance. Both close proximity to streams and presence of turbulent water had a positive impact on realized activity among the slowly activated species, coinciding with observed distribution patterns of hydrophilic species. The results presented here may thus partly explain observed habitat restrictions of rare hydrophilic lichens.
Subject headings
- NATURVETENSKAP -- Biologi -- Botanik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Botany (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- Bryoria bicolor
- Lobaria amplissima
- Platismatia glauca
- Platismatia norvegica
- Usnea longissima
- hydrophilic epiphytic lichens
- photosynthesis
- photosystem II activation
- suboceanic distributional patterns
- water relations
Publication and Content Type
- ref (subject category)
- art (subject category)
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