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A growth cline in encrusting benthos along a latitudinal gradient within Antarctic waters

Barnes, D.K.A.; Arnold, R.J.. 2001 A growth cline in encrusting benthos along a latitudinal gradient within Antarctic waters. Marine Ecology Progress Series, 210. 85-91.

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Abstract/Summary

Growth and mortality of 3 species (Inversiula nutrix, Celleporella bougainvillei, Fenestrulina rugula) of encrusting bryozoans were examined from 5 Antarctic localities, along a latitudinal gradient. Typically, growth in marine invertebrates is, for ecological equivalents, slower or much slower in cold seas than warm waters. Contrary to the general trend, growth rates of 3 bryozoans were found to accelerate with increasing latitude in Antarctic waters. Population age structure also showed a dramatic change across the 5 study sites (from 54 to 68 degrees S) through hugely increased mortality with increasing latitude. Reduction in inter-specific competition is theorised as explaining higher growth rates. Increased levels of ice scour are probably responsible for the differential mortality.

Item Type: Publication - Article
Programmes: BAS Programmes > Antarctic Science in the Global Context (2000-2005) > Life at the Edge - Stresses and Thresholds
ISSN: 01718630
Additional Keywords: Bryozoans; Mortality;
NORA Subject Terms: Marine Sciences
Biology and Microbiology
Zoology
Ecology and Environment
Date made live: 05 Aug 2010 08:52
URI: http://nora.nerc.ac.uk/id/eprint/10179

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