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Abstract Detail


Biogeography

Serebryanaya, Anna [1], Shipunov, Alexey B. [2].

Population-level plant diversity on the uprising islands of Northern Russia.

THE purpose of this project was to determine the degree of difference between island and mainland plant populations in the Russian White Sea region. Melting of glacial ice approximately 9000 years ago formed the White Sea and the islands in this region. Apparently, new islands were inhabited from the mainland, and later on the new populations became isolated. Thus, the differences between island and mainland populations may be correlated with the age of the island. In 2003-2005, over 2500 plants in 171 populations were examined, taken from 49 islands and from the mainland. Seven species of the most diverse and common plants of this region were studied: Atriplex nudicaulis s.l., Euphrasia frigida, Achillea millefolium s.l., Parnassia palustris, Rhodiola rosea, Carex aquatilis, and Potentilla egedii. Based on the statistical analysis of our data, we conclude that there are significant and stable differences between some island and mainland populations. These differences could be the consequence of bottleneck-like processes because we found significant negative correlations with the age of islands (at least for Euphrasia, Carex and Rhodiola species). Atriplex diversity is too high for unequivocal conclusions. Achillea and Parnassia demonstrate another pattern, probably related to the ecological "wind effect" that changed morphology of plants from outlying islands.[c.e.:srb]


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Related Links:
White Sea expeditions of Moscow South-West High School


1 - Moscow South-West High School 1543, Biological Department, 26 Bakinskih Komissarov Street 3-5, Moscow, 119571, Russian Federation
2 - University of Idaho, Department of Forest Resources, Moscow, Idaho, 83844-1133, USA

Keywords:
island biogeography
plant diversity
bottleneck effect.

Presentation Type: Oral Paper:Papers for Topics
Session: 64-14
Location: 134/Performing Arts Center
Date: Wednesday, August 2nd, 2006
Time: 11:45 AM
Abstract ID:459


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