HR: 1340h
AN: H13F-1380    [Abstracts]
TI: Phospholipid Fatty Acid Analysis of Algal Communities in the San Luis Drain, California
AU: * Borglin, S E
EM: seborglin@lbl.gov
AF: Environmental Engineering Research Program, University of the Pacific, 3601 Pacific Ave Sears Hall Room 117, Stockton, CA 95211 United States
AU: * Borglin, S E
EM: seborglin@lbl.gov
AF: Ecology Department Lawrence Berkeley Nat'l Laboratory, 1 Cyclotron Rd, MS 70A-3317, Berkeley, CA 94720 United States
AU: Stringfellow, W T
EM: wstringfellow@lbl.gov
AF: Environmental Engineering Research Program, University of the Pacific, 3601 Pacific Ave Sears Hall Room 117, Stockton, CA 95211 United States
AU: Stringfellow, W T
EM: wstringfellow@lbl.gov
AF: Ecology Department Lawrence Berkeley Nat'l Laboratory, 1 Cyclotron Rd, MS 70A-3317, Berkeley, CA 94720 United States
AU: Hanlon, J S
EM: jshanlon@lbl.gov
AF: Environmental Engineering Research Program, University of the Pacific, 3601 Pacific Ave Sears Hall Room 117, Stockton, CA 95211 United States
AU: Hanlon, J S
EM: jshanlon@lbl.gov
AF: Ecology Department Lawrence Berkeley Nat'l Laboratory, 1 Cyclotron Rd, MS 70A-3317, Berkeley, CA 94720 United States
AB: Algal, bacterial, and zooplankton biomass and species diversity were examined by measuring phospholipid fatty acid (PLFA) in water samples along the San Luis Drain in the San Joaquin Valley of California. Algal growth has been has been identified as a major cause of the degradation of water quality in the San Joaquin River. The San Luis Drain is a concrete lined channel than transports agricultural drainage water from the west side of the San Joaquin Valley to the San Joaquin River. Understanding the growth of algae in the San Luis Drain, a potential major input of algae into the San Joaquin River, is central in understanding potential algal control measures for this region. Samples were taken along the length of the drain in early, mid and late summer. Signature fatty acids were used to understand the ecology of algal and zooplankton through total lipid analysis and by analyzing shifts in PLFA composition. It was found that lipids associated with algal growth were highly correlated with chlorophyll measurements, and dips in the chlorophyll concentration corresponded to an increase in zooplankton lipids. Algal community structure was relatively constant along the drain during a sampling event but shifted significantly between sampling event through the summer season.
DE: 0402 Agricultural systems
DE: 0410 Biodiversity
DE: 0465 Microbiology: ecology, physiology and genomics (4840)
DE: 0496 Water quality
SC: Hydrology [H]
MN: Fall Meeting 2005