NDLI: Morphological and genetic variation across reef habitats in a broadcast-spawning octocoral

Content Provider	Springer Nature Link
Author	Kim, Elizabeth Lasker, Howard R. Coffroth, Mary Alice Kim, Kiho
Copyright Year	2004
Abstract	Octocorals, like many other colonial benthic invertebrates, exhibit remarkable levels of morphological variability. The basis for this variability has been largely unexplored. Plexaura flexuosa Lamouroux, a common Caribbean octocoral, is found in virtually all reef habitats, and exhibits habitat-related differences in growth rates and fecundity. Population genetic structure and morphological variability in branch and sclerite characters were examined in nine populations from back reef, shallow forereef, and forereef habitats in the Florida Keys. Discriminant analysis of morphological characters correctly classified 89, 88, and 100% of samples from back, shallow fore, and forereef habitats, respectively. Analysis of randomly amplified polymorphic DNA profiles (RAPDs) showed no evidence of genetic differentiation between shallow back, shallow fore, and the majority of forereef colonies. However, there were two distinct genetic groups of forereef colonies. Much of the habitat-related morphological variability among Plexaura flexuosa is due to plasticity, which is likely an important feature contributing to the broad distribution of this species. However, there may be two genetic subgroups on forereefs.
Starting Page	423
Ending Page	432
Page Count	10
File Format	PDF
ISSN	00188158
Journal	Hydrobiologia
Volume Number	530
Issue Number	1-3
e-ISSN	15735117
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2004-01-01
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	gorgonian phenotypic plasticity ecotypic variation RAPDs coral reef Ecology Hydrobiology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science

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