The Tomales Bay Macrocosm: Proposed Research Site for       Investigation of Biogeochemical Reactions in Estuaries.     1.  Interannual Variations in Nutrient Budgets
{'Code': '06040302', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'OCE', 'LongName': 'Division Of Ocean Sciences'}}
{'SignBlockName': 'Nicholas Anderson', 'PO_EMAI': 'nanderso@nsf.gov', 'PO_PHON': '7032924715'}
This project is a one year continuation of the PI's long term                   study of Tomales Bay, California.  It will complete his ongoing                 hydrographic and nutrient survey.  Tomales Bay is unique because                of its hydrgraphic simplicity and because of the long residence                 time of its water.  These factors greatly facilitate mass and                   flux calculations for the water, salt, and nutrients within the                 Bay, itself.  In addition, the Bay is optimum for studying the                  exchange of material between the land, the estuary and the                      coastal ocean.  It is a "net heterotrophic system," meaning that                it consumes more organic matter than it consumes.  It is also a                 denitrifying system where nitrogen gas is released to the                       atmosphere as the microbes decompose organic matter.                                                                                                            The PI seeks to answer the following question.  Is the                          heterotrophy of this and similar systems fueled by material from                the land or by material from the coastal ocean?  A great deal of                organic matter is delivered to the Bay from the coastal ocean,                  but when upwelling is weak terrestrial runoff is strong and may                 contribute even more organic matter.  With this additional year                 of sampling the PI will resolve the relative importance of these                potential sources.   The results of this study may force a                      recalculation of the global carbon and nitrogen budget because                  other estuarine systems may also be net heterotrophic rather than               net autotrophic as previously thought.
{'FirstName': 'Stephen', 'LastName': 'Smith', 'PI_MID_INIT': 'V', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'Stephen V Smith', 'EmailAddress': 'svsmith@soest.hawaii.edu', 'NSF_ID': '000378289', 'StartDate': '01/15/1989', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
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[{'Code': '1650', 'Text': 'BIOLOGICAL OCEANOGRAPHY'}, {'Code': '1670', 'Text': 'Chemical Oceanography'}]
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