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Cryptic Bryozoa, leeward fringing reef of Bonaire, Netherlands Antilles, and their paleoecological application

Published online by Cambridge University Press:  02 September 2016

David R. Kobluk ,
Roger J. Cuffey ,
Shirley S. Fonda  and
Mary A. Lysenko
David R. Kobluk
Affiliation:
Geological Sciences, J. Tuzo Wilson Research Laboratories, Erindale Campus, University of Toronto, Mississauga, Ontario L5L 1C6, Canada
Roger J. Cuffey
Affiliation:
Department of Geosciences (Deike Building), Pennsylvania State University, University Park, 16802
Shirley S. Fonda
Affiliation:
Department of Geosciences (Deike Building), Pennsylvania State University, University Park, 16802
Mary A. Lysenko
Affiliation:
Geological Sciences, J. Tuzo Wilson Research Laboratories, Erindale Campus, University of Toronto, Mississauga, Ontario L5L 1C6, Canada
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Abstract

A collection of 6,151 bryozoan colonies (two cyclostome species from two families, and 73 cheilostome species from 30 families) from the leeward fringing reef of Bonaire, Netherlands Antilles, is largely, but not entirely, of Caribbean affinities, with some links to Indo-Pacific populations. The bryozoans from Bonaire show some relation to water depth at species and higher taxonomic levels, but these relations are not clear-cut. Many of the species are found through all or most of the 73 meter depth range sampled, but a few are limited to shallow water, and some to deeper water. At a higher taxonomic level, some families (e.g., Calloporidae, Bugulidae, Smittinidae) include wide depth-ranging species, shallow-water species, and deep-water species; this indicates some divergence between species and family-level depth distributions. Several calculated diversity indices show variable trends with increasing water depth, with at most only slight increases with depth. The bryozoans in this southern Caribbean reef assemblage do not show the well-defined depth zonation of corals. However, the recognition of deep- and shallow-water assemblages containing diagnostic species does show that cryptic reef-dwelling bryozoans have paleoecological utility as depth indicators in ancient reefs.

Type
Research Article
Information
Journal of Paleontology , Volume 62 , Issue 3 , May 1988 , pp. 427 - 439
Copyright
Copyright © The Paleontological Society 

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