HR: 16:30h
AN: NB14B-05    [Abstracts]
TI: Characterization of Organic Carbon Released from Different Wetland Habitats in the Sacramento-San Joaquin Delta
AU: * Kraus, T E
EM: tkraus@usgs.org
AF: U.S. Geological Survey, Placer Hall, CSUS 6000 J Street, Sacramento, CA 95819 United States
AU: Bergamaschi, B A
EM: bbergama@usgs.gov
AF: U.S. Geological Survey, Placer Hall, CSUS 6000 J Street, Sacramento, CA 95819 United States
AU: Stepanauskas, R
EM: ramunas@uga.edu
AF: Department of Marine Sciences, University of Georgia, Athens, GA 30602 United States
AU: Fram, M S
EM: mfram@usgs.gov
AF: U.S. Geological Survey, Placer Hall, CSUS 6000 J Street, Sacramento, CA 95819 United States
AU: Doctor, D H
EM: dhdoctor@usgs.gov
AF: U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025 United States
AU: Kendall, C
EM: ckendall@usgs.gov
AF: U.S. Geological Survey, 345 Middlefield Road, Menlo Park, CA 94025 United States
AU: Losee, R F
EM: rlosee@mwdh2o.com
AF: Metropolitan Water District of Southern California, 700 Moreno Avenue, La Verne, CA 91750 United States
AU: Eckard, R S
EM: rseckard@ucdavis.edu
AF: Department of Land, Air, Water Resources, 1 Shield Avenue Univeristy of Califonria, Davis, CA 95616 United States
AU: Hollibaugh, J T
EM: aquadoc@uga.edu
AF: Department of Marine Sciences, University of Georgia, Athens, GA 30602 United States
AU: Hernes, P J
EM: pjhernes@ucdavis.edu
AF: Department of Land, Air, Water Resources, 1 Shield Avenue Univeristy of Califonria, Davis, CA 95616 United States
AB: The Sacramento-San Joaquin Delta is a source of drinking water for over 22 million people in California as well as a source of carbon for the aquatic foodweb in San Francisco Bay. To improve the ecological health of the Bay-Delta system, large areas of the Delta may be restored to wetlands. We investigated the potential impact of these changes on the compositional quality of dissolved organic material (DOM) in the Delta by examining alterations of DOM concentration and composition through interactions with tidal and non-tidal wetlands, and agricultural water use. Fourteen sites were sampled for two years and analyses were conducted on both whole water and XAD isolated material. Our comprehensive chemical characterization of DOM included measurement of drinking water disinfection byproduct formation potential, bioavailability, optical properties, isotopic ratios (C, N, S), carbohydrate content and lignin-phenolic content. The isotopic and molecular tracer data can help us elucidate if the DOM is derived from wetland plants, peat soils, or in-channel algal productivity, which vary seasonally and by site. The impact of restored wetlands on drinking water quality and the aquatic foodweb will depend on DOM loads as well as composition.
DE: 0400 Biogeosciences
SC: North American Benthological Society [NB]
MN: 2005 Joint Assembly