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Intertidal colonization rates. A matched latitude, north v. south, remote v. near shore island experiment

Davenport, J.; Stevenson, T.. 1998 Intertidal colonization rates. A matched latitude, north v. south, remote v. near shore island experiment. Diversity and Distributions, 4 (2). 87-92. 10.1046/j.1472-4642.1998.00008.x

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Abstract/Summary

Colonization of artificial substrata was monitored on sheltered rocky shores at Husvik, South Georgia (54° 11′S; 36° 40′W) and Cumbrae, Scotland (55° 46′N; 4° 55′W) from mid summer to early autumn. South Georgia is a remote island (1,330 km from other land); Cumbrae is only 2 km from nearby coasts. Both islands were heavily glaciated for a period up to about 10,000 ybp, so the intertidal fauna is of geologically recent origin. The South Georgian fauna is depauperate and consists mainly of direct developers; that of Cumbrae is rich and largely larviparous. Colonization rates at Cumbrae were one to four orders of magnitude greater than at Husvik. It is suggested that the fauna of South Georgian shores stems from colonization by rafting from remote sources, while Cumbrae has been supplied predominantly by short-range pelagic larval dispersal. The measured differences in colonization rates reflect the substantial local advantage of larval dispersal over direct development in established communities

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1046/j.1472-4642.1998.00008.x
Programmes: BAS Programmes > Pre 2000 programme
ISSN: 1366-9516
Additional Keywords: South Georgia, intertidal fauna, colonization, biogeography rafting
Date made live: 25 Nov 2013 10:23 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/503984

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