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The Fish Communities of a Coral Reef Transect

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Title:The Fish Communities of a Coral Reef Transect
Authors:Galzin, Rene
Legendre, Pierre
Date Issued:1987
Publisher:University of Hawaii Press
Citation:Galzin R, Legendre P. 1987. The fish communities of a coral reef transect. Pac Sci 41: 158-165.
Abstract:As a contribution to the discussion on the causes of the high fish
species diversity found on coral reefs, a coast-to-sea transect has been studied
in the lagoon of Moorea Island (French Polynesia) in order to uncover the spatial
scales at which recurrent assemblages (i.e., communities) can be identified. The
transect was divided into 22 stations where fishes were sampled. According to
the null hypothesis (chaos), the fish species should be distributed at random
along the transect. This was tested first by a method of constrained clustering
that performs a statistical test of cluster fusion, based on a null hypothesis that
corresponds to chaos. Groups of stations were found with, at most, a 5% chance
of resulting from a random distribution of species among the groups. The
distribution of species among the stations pro vided a second test of the null
hypothesis; the observed number of ubiquitous species was found to be significantly
smaller than expected under the hypothesis of chaos and, in the same way,
the species limited to a single group of stations were found to be significantly
more numerous than expected under chaos. Both patterns are consistent with
reports from other reefs of the Indo-Pacific.
Appears in Collections: Pacific Science Volume 41, Numbers 1-4, 1987

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