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dc.contributor.authorPannewitz, Stefan
dc.contributor.authorGreen, T.G. Allan
dc.contributor.authorSchlensog, Mark
dc.contributor.authorSeppelt, Rodney D.
dc.contributor.authorSancho, Leopoldo G.
dc.contributor.authorSchroeter, Burkhard
dc.date.accessioned2008-08-18T02:53:54Z
dc.date.available2008-08-18T02:53:54Z
dc.date.issued2006
dc.identifier.citationPannewitz, S., Green, T. G. A., Schlensog, M., Seppelt, R., Sancho, L. G., & Schroeter, B. (2006). Photosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarctica. The Lichenologist, 38(01), 67-81.en_US
dc.identifier.issn0024-2829
dc.identifier.urihttps://hdl.handle.net/10289/955
dc.description.abstractXanthoria mawsonii C. W. Dodge was found to perform well physiologically in a variety of habitats at high latitudes in continental Antarctica. The net photosynthetic rate of 7•5 μ mol CO2 kg−1 s−1 is exceptionally high for Antarctic lichens. Field and laboratory measurements proved the photosynthetic apparatus to be highly adapted to strong irradiance. The cold resistance of the photosystem II reaction centres is higher than the photosynthetic CO2 fixation process. Optimum temperature for net photosynthesis was c. 10°C. The lichen grows along water channels where it is frequently inundated and hydrated to maximum water content, although net photosynthesis is strongly depressed by super saturation. In these habitats the lichen is photosynthetically active for long periods of time. Xanthoria mawsonii also grows at sites where it depends entirely on the early spring snow melt and occasional snow fall for moisture. It has an exceptionally short reactivation phase and is able to utilize snow immediately. Recovery of activity by absorbing water vapour from air, though practically possible, seems to be of ecological importance only under snow at subzero temperatures.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherCambridge University Pressen_NZ
dc.relation.urihttp://journals.cambridge.org/action/displayJournal?jid=LICen_US
dc.rightsThis article is published in the journal, The Lichenologist. Copyright © British Lichen Society 2005.en_US
dc.subjectchlorophyll a fluorescenceen_US
dc.subjectlichensen_US
dc.subjectphotosynthesisen_US
dc.subjecttemperatureen_US
dc.subjectwater contenten_US
dc.titlePhotosynthetic performance of Xanthoria mawsonii C. W. Dodge in coastal habitats, Ross Sea region, continental Antarcticaen_US
dc.typeJournal Articleen_US
dc.identifier.doi10.1017/S0024282905005384en_US
dc.relation.isPartOfThe Lichenologisten_NZ
pubs.begin-page67en_NZ
pubs.editionJanuaryen_NZ
pubs.elements-id31820
pubs.end-page81en_NZ
pubs.issue1en_NZ
pubs.volume38en_NZ


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