Funding for this Project will be used to develop a leading-edge isotope toolset specifically for the Delta that will enable new and far more detailed understanding of interactions between human habitat alterations, biogeochemical processes, and food web structures. This Project will characterize the carbon (13C) and nitrogen (15N) isotope values of amino acids (AA) from Delta primary producers, use these to develop food web models, and then assess seasonal and decadal dynamics of the large-scale biogeochemistry change using long-term collections of invasive clams.
Regents of the University of California, Santa Cruz
Objectives for this Project are:
1. Collect primary producers from an in-Delta environment and measure the carbon and nitrogen isotope ratios of bulk tissues as well as amino acids to characterize the amino acid profiles of Delta primary producers.
2. Acquire archived Corbicula fluminea materials and particulate organic matter and analyze the carbon and nitrogen isotope ratios of amino acids to assess the capacity of the amino acid approach to understand longer-term dynamics in nutrient outflow from the Delta.
3. Acquire archived Potamocorbula amurensis materials and particulate organic matter and analyze the carbon and nitrogen isotope ratios of amino acids to assess if there have been changes in the nutrient output from the Delta to the Bay over the last decade.
Monitoring, Research/Planning (including Science)
Project Benefits a Disadvantaged Community (or SDAC):