Accession Number:

ADA149816

Title:

Aspects of Benthic Biology in Support of HEBBLE (High Energy Benthic Boundary Layer Experiment).

Descriptive Note:

Final technical rept.,

Corporate Author:

WAYNE STATE UNIV DETROIT MI DEPT OF BIOLOGICAL SCIENCES

Personal Author(s):

Report Date:

1985-01-08

Pagination or Media Count:

80.0

Abstract:

This paper gives an overview of the structure of a benthic community at 4626 m depth on the Nova Scotian continental rise. Here, abundances of polychaetes, bivalves, isopods, and tanaids are conspicuously high compared to those reported from comparable depths. Bacterial numbers and ATP concentrations are also high. We suspect that these anomalous abundances result from enhanced food abundance caused by the strong near-bottom currents that flow through the area. The polychaete and bivalve faunas have few adults and high species dominance suggesting that currents create large-scale, sediment-transporting disturbances. The composition of the crustacean fauna supports this inference in that it is dominated by forms that can enter the seabed and thereby escape adverse conditions on the sediment surface.

Subject Categories:

  • Biology
  • Biological Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE