Fungal biodiversity in dead leaves of fertilized plants of Dryas octopetala from a high arctic site
Identifieur interne : 001E30 ( Main/Exploration ); précédent : 001E29; suivant : 001E31Fungal biodiversity in dead leaves of fertilized plants of Dryas octopetala from a high arctic site
Auteurs : C. H. Robinson [Royaume-Uni] ; P. J. Fisher [Royaume-Uni] ; B. C. Sutton [Royaume-Uni]Source :
- Mycological Research [ 0953-7562 ] ; 1997.
Abstract
At a high arctic, polar semi-desert site (79 N) in Svalbard, nitrogen, phosphorus and potassium fertilizers were added to the soil for 5 yr to simulate increases in decomposition and nutrient mineralization which may occur as a result of increases in soil temperature and soil moisture caused by environmental change. Abundance of decomposer fungal species, isolated from standing-dead leaves of Dryas octopetala, varied between fertilized and unfertilized plots. Fungal biodiversity, as indicated by the Brillouin index, was lower in dead Dryas leaves from the fertilized plots, although more colonies were isolated from leaves of plants which had been fertilized. The fungi were cosmopolitan and not restricted to tundra areas. The dead leaves from the fertilized plots contained more nitrogen and phosphorus than those of the unfertilized plants. Leaves in the fertilized plots appeared to have been killed by winter injury resulting from an extended growing season in an atypically mild and wet autumn, which was followed quickly by extreme subzero temperatures.
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DOI: 10.1017/S0953756297005492
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Robinson</name><affiliation wicri:level="4"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Division of Life Sciences, King's College, University of London, Campden Hill Road, London W8 7AH</wicri:regionArea><orgName type="university">Université de Londres</orgName><placeName><settlement type="city">Londres</settlement><region type="country">Angleterre</region><region type="région" nuts="1">Grand Londres</region></placeName></affiliation><affiliation wicri:level="1"><country xml:lang="fr">Royaume-Uni</country><wicri:regionArea>Previous address: Sheffield Centre for Arctic Ecology, Department of Animal and Plant Sciences, University of Sheffield, Sheffield S10 2UQ</wicri:regionArea><wicri:noRegion>Sheffield S10 2UQ</wicri:noRegion></affiliation></author><author><name sortKey="Fisher, P J" sort="Fisher, P J" uniqKey="Fisher P" first="P. J." last="Fisher">P. J. 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Abundance of decomposer fungal species, isolated from standing-dead leaves of Dryas octopetala, varied between fertilized and unfertilized plots. Fungal biodiversity, as indicated by the Brillouin index, was lower in dead Dryas leaves from the fertilized plots, although more colonies were isolated from leaves of plants which had been fertilized. The fungi were cosmopolitan and not restricted to tundra areas. The dead leaves from the fertilized plots contained more nitrogen and phosphorus than those of the unfertilized plants. Leaves in the fertilized plots appeared to have been killed by winter injury resulting from an extended growing season in an atypically mild and wet autumn, which was followed quickly by extreme subzero temperatures.</div></front></TEI><affiliations><list><country><li>Royaume-Uni</li></country><region><li>Angleterre</li><li>Grand Londres</li></region><settlement><li>Londres</li></settlement><orgName><li>Université de Londres</li></orgName></list><tree><country name="Royaume-Uni"><region name="Angleterre"><name sortKey="Robinson, C H" sort="Robinson, C H" uniqKey="Robinson C" first="C. H." last="Robinson">C. H. Robinson</name></region><name sortKey="Fisher, P J" sort="Fisher, P J" uniqKey="Fisher P" first="P. J." last="Fisher">P. J. Fisher</name><name sortKey="Robinson, C H" sort="Robinson, C H" uniqKey="Robinson C" first="C. H." last="Robinson">C. H. Robinson</name><name sortKey="Sutton, B C" sort="Sutton, B C" uniqKey="Sutton B" first="B. C." last="Sutton">B. C. 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