A temporal and spatial study of invertebrate communities associated with hard-bottom habitats in the South Atlantic Bight

Wenner, E. L. and Hinde, P. and Knott, D. M and Van Dolah, R. F. (1984) A temporal and spatial study of invertebrate communities associated with hard-bottom habitats in the South Atlantic Bight. NOAA/National Marine Fisheries Service, (NOAA Technical Report NMFS, 18)

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Abstract

Species composition, biomass, density, and diversity of benthic invertebrates from six bard-bottom areas were evaluated. Seasonal collections using a dredge, trawl, and suction and grab samplers yielded 432, 525, and 845 taxa, respectively. Based on collections wltb the different gear types, species composition of invertebrates was found to change bathymetrically. Inner- and mlddle-shelf sites were more similar to each other in terms of invertebrate species composition than they were to outer-shelf sites, regardless of season. Sites on the inner and outer shelf were grouped according to latitude; however, results suggest that depth is apparently a more important determinant of invertebrate species composition than either season or latitude. Sponges generally dominated dredge and trawl collections in terms of biomass. Generally, cnidarians, bryozoans, and sponges dominated at sites In terms of number of taxa collected. The most abundant smaller macrofauna collected in suction and grab samples were polychaetes, amphipods, and mollusks. Densities of the numerically dominant species changed botb seasonally and bathymetrically, with very few of these species restricted to a specific bathymetrlc zone. The high diversity of invertebrates from hard-bottom sites is attributed to the large number of rare species. No consistent seasonal changes in diversity or number of species were noted for individual stations or depth zones. In addition, H and its components showed no definite patterns related to depth or latitude. However, more species were collected at middle-shelf sites than at inner- or outer-shelf sites, which may be related to more stable bottom temperature or greater habitat complexity in that area. (PDF file contains 110 pages.)

Item Type: Monograph or Serial Issue
Title: A temporal and spatial study of invertebrate communities associated with hard-bottom habitats in the South Atlantic Bight
Personal Creator/Author:
CreatorsEmail
Wenner, E. L.
Hinde, P.
Knott, D. M
Van Dolah, R. F.
Series Name: NOAA Technical Report NMFS
Number: 18
Date: 1984
Publisher: NOAA/National Marine Fisheries Service
Issuing Agency: United States National Marine Fisheries Service
Subjects: Ecology
Fisheries
Biology
Item ID: 2804
Depositing User: Patti M. Marraro
Date Deposited: 11 Nov 2009 13:06
Last Modified: 29 Sep 2011 18:22
URI: http://aquaticcommons.org/id/eprint/2804

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