Control of Benthic Processes by Oxygen and Topography

Abstract

LONG TERM GOALS: Our goal is to identify the processes determining abundance, distribution, and composition of infaunal assemblages in bathyal settings including seamounts and continental margins. Effects of topography, oxygen availability and organic matter supply are of primary concern. SCIENTIFIC/TECHNICAL OBJECTIVES: Research this year continues examination of the nature and causes of shifts in benthic community structure across the oxygen minimum zone (OMZ) on the Oman Margin, Arabian Sea. Our objectives were to (a) distinguish community-level effects of low bottom-water oxygen concentration, water depth, hydrodynamic regime and organic enrichment on the structure of margin assemblages (b) examine biogenic sediment features as community structuring agents (c) evaluate oxygen controls on bioturbation (d) test biofacies models constructed for ancient low oxygen environments using modern faunas and (e) generate data for a model that examines oxygen influence on trophic pathways.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1997
Accession Number
ADA634255

Entities

People

  • Lisa A. Levin

Organizations

  • Scripps Institution of Oceanography

Tags

DTIC Thesaurus Topics

  • Arabian Sea
  • Bottom Waters
  • Climate Change
  • Communities
  • Environment
  • Geography
  • High Density
  • Information Operations
  • North Carolina
  • Oceanography
  • Oceans
  • Pigments
  • Sea Water
  • Sediments
  • Shallow Water
  • Topography
  • Water

Fields of Study

  • Environmental science

Readers

  • Acoustical Oceanography.
  • Aquatic Ecology
  • Marine Ecotoxicology