Bioavailability of Cd, Cr, and Zn to bivalves in south San Francisco Bay
Conference
·
OSTI ID:201176
- Geological Survey, Menlo Park, CA (United States)
- Columbia Univ., Palisades, NY (United States). Lamont Doherty Earth Observatory
The bioavailability of Cd, Cr, and Zn to benthic bivalves (Potamocorbular amurensis and Macoma balthica) is affected by the type of natural particles the animals ingest, and the concentration and speciation of dissolved metals. During a spring phytoplankton bloom in south San Francisco Bay dissolved Cd and Zn concentrations decreased to about half of pre-bloom concentrations. The concentrations of particulate Cd and Zn concentrations increased due to preferential uptake of these metals by phytoplankton. Assimilation of Cd was more efficient when clams ate pure phytoplankton (80% for M. balthica and 29% for P. amurensis) than when they were exposed to inorganic-dominated particles. M. balthica and P. amurensis assimilated 72% and 42% of Zn associated with the particles during the bloom. Assimilation of Cr was low (<6%) and particle type had little effect on its availability. Accumulation of Cd via the dissolved route was low in high salinity waters (15 ppt). Metal bioaccumulation in the bivalves was modeled using the experimentally determined physiological parameters. The results were compared to metal concentrations in clams from the Bay. The model suggested that the clams accumulated Cd and Zn at higher rates during the phytoplankton bloom, although dissolved metal concentrations in the water column were reduced.
- OSTI ID:
- 201176
- Report Number(s):
- CONF-9511137--; ISBN 1-880611-03-1
- Country of Publication:
- United States
- Language:
- English
Similar Records
The relationship of metal exposure and condition index in Potamocorbula amurensis in San Francisco Bay
Mucus-exopolymer utilization by two bivalves with different feeding strategies
Assimilation of cadmium, chromium, and zinc by the green mussel Perna viridis and the clam Ruditapes philippinarum
Conference
·
Sat Dec 30 23:00:00 EST 1995
·
OSTI ID:211911
Mucus-exopolymer utilization by two bivalves with different feeding strategies
Conference
·
Mon Jan 08 23:00:00 EST 1990
· EOS, Transactions, American Geophysical Union; (United States)
·
OSTI ID:6616123
Assimilation of cadmium, chromium, and zinc by the green mussel Perna viridis and the clam Ruditapes philippinarum
Journal Article
·
Thu Jun 01 00:00:00 EDT 2000
· Environmental Toxicology and Chemistry
·
OSTI ID:20062550