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dc.contributor.authorSchroeter, Burkhard
dc.contributor.authorGreen, T.G. Allan
dc.contributor.authorPannewitz, Stefan
dc.contributor.authorSchlensog, Mark
dc.contributor.authorSancho, Leopoldo G.
dc.date.accessioned2010-10-06T23:37:29Z
dc.date.available2010-10-06T23:37:29Z
dc.date.issued2010
dc.identifier.citationSchroeter, B., Gree, T.G.A., Pannewitz, S., Schlensog, M. & Sancho, L.G. (2010). Fourteen degrees of latitude and a continent apart: comparison of lichen activity over two years at continental and maritime Antarctic sites. Antarctic Science, 22, 681-690.en_NZ
dc.identifier.urihttps://hdl.handle.net/10289/4659
dc.description.abstractThere are marked declines in precipitation, mean temperatures and the number of lichen species with increasing latitude in Antarctica. However, it is not known which factors are the predominant controllers of biodiversity changes. Results are presented from over two years of almost continuous monitoring of both microclimate and activity in lichens at Livingston Island, South Shetland Islands, 62°S, and Botany Bay, Ross Sea region, 77°S. Lichen activity was evident over a much longer period at Livingston Island, (3694 versus 897 hours) and could occur in any month whereas it was almost completely confined to the period November–February at Botany Bay. Mean air temperatures were much lower at Botany Bay (-18° compared to -1.5°C at Livingston Island), but the temperatures at which the lichens were active were almost identical at around 2°C at both sites. When the lichens were active incident light at Botany Bay was very much higher. The differences are related to the availability of meltwater which only occurs at times of high light and warm temperatures at Botany Bay. Temperature as a direct effect does not seem to explain the differences in biodiversity between the sites, but an indirect effect through active hours is much more probable. In addition there are negative effects of stresses such as high light and extreme winter cold at Botany Bay.en_NZ
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherAntarctic Science Ltden_NZ
dc.relation.urihttp://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=7901782&fulltextType=RA&fileId=S0954102010000647en_NZ
dc.rights© Antarctic Science Ltd 2010
dc.subjectbiodiversityen_NZ
dc.subjectlighten_NZ
dc.subjectproductivityen_NZ
dc.subjectstressen_NZ
dc.subjecttemperatureen_NZ
dc.titleFourteen degrees of latitude and a continent apart: comparison of lichen activity over two years at continental and maritime Antarctic sitesen_NZ
dc.typeJournal Articleen_NZ
dc.identifier.doi10.1017/S0954102010000647en_NZ
dc.relation.isPartOfAntarctic Scienceen_NZ
pubs.begin-page681en_NZ
pubs.elements-id35377
pubs.end-page690en_NZ
pubs.issue6en_NZ
pubs.volume22en_NZ


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