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Polar Lakes and RiversLimnology of Arctic and Antarctic Aquatic Ecosystems$
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Warwick F. Vincent and Johanna Laybourn-Parry

Print publication date: 2008

Print ISBN-13: 9780199213887

Published to Oxford Scholarship Online: January 2009

DOI: 10.1093/acprof:oso/9780199213887.001.0001

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Microbial biodiversity and biogeography

Microbial biodiversity and biogeography

(p.213) CHAPTER 12 Microbial biodiversity and biogeography
Polar Lakes and Rivers

David A. Pearce

Pierre E. Galand

Oxford University Press

This chapter summarizes the major groups of microorganisms found in high latitude aquatic ecosystems and the methodological approaches used to study their biodiversity. The underlying mechanisms that influence microbial biodiversity, including both the survival and dispersal of microorganisms in polar aquatic environments, are explored. The chapter considers the biogeography of microorganisms (i.e., the distribution of taxa) in polar aquatic ecosystems and presents studies that reveal a degree of endemism. To date, studies have shown that among the microorganisms of polar aquatic habitats, morphological class hides a much greater genetic diversity; the extent of the biodiversity uncovered is proportional to sample effort; the vast majority of biodiversity is as yet uncultivated; cosmopolitan groups are present; and that the key environmental factors controlling microbial distribution are temperature and biotic interactions.

Keywords:   microbes, bacteria, endemism, morphology, molecular biodiversity, dispersal, survival

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