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Modelling hydration...
Modelling hydration and photosystem II activation in relation to in situ rain and humidity patterns : a tool to compare performance of rare an generalist epiphytic lichens
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- Jonsson Čabrajić, Anna V (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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- Lidén, Marlene (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Sveriges Lantbruksuniversitet, Umeå, Institutionen för Skogens ekologi och skötsel
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- Lundmark, Tomas (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Sveriges Lantbruksuniversitet, Umeå, Enheten för skoglig fältforskning
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- Ottosson Löfvenius, Mikaell (författare)
- Swedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Institutionen för skogens ekologi och skötsel,Department of Forest Ecology and Management,Sveriges Lantbruksuniversitet, Umeå, Institutionen för Skogens ekologi och skötsel
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- Palmqvist, Kristin (författare)
- Umeå universitet,Institutionen för ekologi, miljö och geovetenskap
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(creator_code:org_t)
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- Wiley, 2010
- 2010
- Engelska.
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Ingår i: Plant, Cell and Environment. - : Wiley. - 0140-7791 .- 1365-3040. ; 33, s. 840-850
- Relaterad länk:
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https://onlinelibrar...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://res.slu.se/i...
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Abstract
Ämnesord
Stäng
- A dynamic water and activity model was developed to assess how efficiently lichens can exploit in situ rain and humid air. The capacity to rehydrate and activate photosynthesis [i.e. photosystem II (PSII)] by these water sources was compared among four hydrophilic and one generalist epiphytic lichen. Hydration status, potential (instant activation) and realized (delayed activation) day-light activity were simulated using a model based on species-specific hydration, PSII activation characteristics and in situ water content for Platismatia norvegica in three microclimatic scenarios. The results showed that delayed PSII activation could have profound effects on lichens' ability to exploit environmental water sources. During rain, realized activity was reduced by 19, 34 and 56% compared to simulations assuming instant activation for three hydrophilic lichens in the driest microclimate. During humid air, the reduction was 81% for the most extreme species and scenario, because of slow hydration and low equilibrium water content. Many and brief hydration events may thus hamper species with slow activation and fast desiccation kinetics. No evidence of compensation by a 'water-holding' morphology was observed among studied species. The developed model may provide a tool for identifying suitable habitats for long-term persistence of lichens with physiological constraints.
Ämnesord
- LANTBRUKSVETENSKAPER -- Annan lantbruksvetenskap -- Miljö- och naturvårdsvetenskap (hsv//swe)
- AGRICULTURAL SCIENCES -- Other Agricultural Sciences -- Environmental Sciences related to Agriculture and Land-use (hsv//eng)
Nyckelord
- Bryoria bicolor
- Lobaria amplissima
- Platismatia glauca
- Platismatia norvegica
- Usnea longissima
- habitat restrictions
- photosynthetic activity
- simulation
- thallus water content
- water potential
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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