Diagenesis of Carotenoid and Chlorophyll Pigments in Lake   Sediments
{'Code': '06030101', 'Directorate': {'Abbreviation': 'GEO', 'LongName': 'Directorate For Geosciences'}, 'Division': {'Abbreviation': 'EAR', 'LongName': 'Division Of Earth Sciences'}}
{'SignBlockName': 'John A. Maccini', 'PO_EMAI': None, 'PO_PHON': None}
The objective of this investigation is to determine the role               of diagenesis in controlling the accumulation of carotenoid and                 chlorophyll pigments in lake sediments.  The research plan                      includes both field data collection and laboratory experiments.                 The field approach involves measuring the concentrations of parent              pigments and their derivatives in sediment traps and sediment                   cores from a group of contrasting lakes.  Comparisons of sediment               trap material and surface sediment cores from a group of                        contrasting lakes.  Comparisons of sediment trap material and                   surface sediments will be used to evaluate the importance of                    oxygen status, sediment mixing, detritivore activity, and organic               matter content in controlling diagenesis rates.  Laboratory                     experiments involve production of 14C-labelled pigments using                   algal cultures, incubation of labelled pigments in sediments under              aerobic and anaerobic conditions, and measurement of the rates and              pathways of pigment degradation by sediment bacteria (aerobic and               anaerobic) and a detritivore (chironomids).  Methodology will                   include analysis of pigments and degradation products by HPLC and               mass spectrometry and use of 210Pb to determine sedimentation                   rates, sediment mixing, and sediment focusing.  Information on                  pigment diagenesis in lake sediments will facilitate using                      sediment pigment profiles to determine organic matter sources,                  changes in algal types and primary production, and to evaluate the              role of organic matter cycling in controlling the chemical                      composition of lakes, all of primary importance to                              paleoenvironmental reconstruction of lake history and to                        understanding of how biomolecules develop into geomolecules.
{'FirstName': 'David', 'LastName': 'Armstrong', 'PI_MID_INIT': 'E', 'PI_SUFX_NAME': None, 'PI_FULL_NAME': 'David E Armstrong', 'EmailAddress': 'armstrong@engr.wisc.edu', 'NSF_ID': '000404316', 'StartDate': '12/15/1988', 'EndDate': None, 'RoleCode': 'Principal Investigator'}
{'Name': 'University of Wisconsin-Madison', 'CityName': 'MADISON', 'ZipCode': '537151218', 'PhoneNumber': '6082623822', 'StreetAddress': '21 North Park Street', 'StreetAddress2': 'Suite 6301', 'CountryName': 'United States', 'StateName': 'Wisconsin', 'StateCode': 'WI', 'CONGRESSDISTRICT': '02', 'CONGRESS_DISTRICT_ORG': 'WI02', 'ORG_DUNS_NUM': '161202122', 'ORG_LGL_BUS_NAME': 'UNIVERSITY OF WISCONSIN SYSTEM', 'ORG_PRNT_DUNS_NUM': '041188822'}
{'Name': None, 'CityName': None, 'StateCode': None, 'ZipCode': None, 'StreetAddress': None, 'CountryCode': None, 'CountryName': None, 'StateName': None, 'CountryFlag': None, 'CONGRESSDISTRICT': None, 'CONGRESS_DISTRICT_PERF': '""'}
{'Code': '1571', 'Text': 'SCEC'}
{'url': 'https://www.nsf.gov/awardsearch/download?DownloadFileName=1988&All=true', 'xml': '8816561.xml'}