Accession Number:

ADA629704

Title:

Interactions Among Ligand Production, Chemical Complexation and Speciation, Algal Accumulation, and Sediment-Water Cycling of Toxic Metals in a Major US Naval Harbor (Elizabeth River, VA)

Descriptive Note:

Corporate Author:

OLD DOMINION UNIV NORFOLK VA DEPT OF OCEAN EARTH AND ATMOSPHERIC SCIENCES

Personal Author(s):

Report Date:

1999-09-30

Pagination or Media Count:

7.0

Abstract:

LONG-TERM GOAL. Our long-term goal is to determine the processes controlling the concentrations, chemical complexation and speciation, biological uptake, and cycling of pollutant metals in the water column and sediments of anthropogenically-impacted harbors. OBJECTIVES. In conjunction with other investigators funded through the ONR Harbor Processes Program we are performing an integrated study of the biogeochemical cycling of three potentially toxic metals Cu, Cd and Zn and two micronutrient metals Mn and Zn in the water column and sediments of a major US Naval harbor, the Elizabeth River VA. We are studying the interrelationships among 1 concentrations and chemical complexation and speciation of toxic and micronutrient trace metals Donat 2 in situ production of Cu chelators by natural microbial populations in response to elevated Cu levels in collaboration with A. GordonJ. Donat ODU 3 uptake of metals by phytoplankton and abiotic particles which transport metals to the bottom via particulate settling in collaboration with W. SundaS. Huntsman NOAANMFS and 4 fluxes of metals and chelators from the sediments back into the water column Donat and Burdige. We are focusing on phytoplankton for the metal uptake studies because they are a the principal primary producers, providing the entry point for metals into the food chain, b important particulate vectors for vertical metal transport, and c may be important in situ sources of chelators.

Subject Categories:

  • Toxicology
  • Microbiology
  • Physical and Dynamic Oceanography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE