Diefendorf, Aaron F; Dietrich, Watts; Naake, Hans H; Lowell, Thomas V; Corcoran, Megan C: Diatom-derived highly branched isoprenoids in lake waters and sediments [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.979496 (dataset in review)
Abstract:
Diatom-derived highly branched isoprenoids (HBIs) are found extensively in marine sediments, but are observed in a limited number of lake sediments. To expand on this record, between 2022 and 2024, we collected lake surface sediment samples from 50 lakes in the United States of America from the Midwest and Northeast. Studied lakes capture a range in climate, water chemistry (e.g., pH, salinity, alkalinity), size, and trophic states. Lakes also vary in their diatom species compositions. Surface sediment samples were collected using a gravity corer or a Bolivia-type square-rod piston corer deployed from a boat. Lake sediments were extracted and analyzed for their HBI compounds and concentrations by gas chromatography mass spectrometry. Lake surface sediments were also analyzed for their carbon and nitrogen concentrations and stable isotopes. Water chemistry profiles were measured in each lake (pH, conductivity, salinity, oxidation reduction potential, dissolved oxygen) using a multiparameter sonde. Water samples from the photic zone were collected using an integrated water sampler (up to 2 m depth) and discrete samples were collected at other depths from a subset of lakes. Integrated water samples were filtered and analyzed to determine if planktonic diatoms produce HBIs. Water samples were analyzed for alkalinity, dissolved inorganic carbon (DIC) concentration, and DIC carbon isotopes.
Keyword(s):
Supplement to:
Diefendorf, Aaron F; Dietrich, Watts; Naake, Hans H; Corcoran, Megan C; Kmetz, Andrew J; Lowell, Thomas V; Schenk, Michael D; Wiles, Gregory; Wilson, Mark (submitted): Diatom-derived highly branched isoprenoids are diverse and widespread in lakes. Organic Geochemistry
Funding:
American Chemical Society (ACS), grant/award no. PRF-60163-ND2: Environmental and Thermal Controls on Diatom Highly Branched Isoprenoids for Oil-Source Rock Correlation
National Science Foundation (NSF), grant/award no. EAR-2039795: Collaborative Research: Tapping an unused biomarker for insights of past evaporation
Coverage:
Median Latitude: 45.033427 * Median Longitude: -85.830733 * South-bound Latitude: 40.680845 * West-bound Longitude: -99.749450 * North-bound Latitude: 48.096390 * East-bound Longitude: -67.419880
Date/Time Start: 2016-10-18T11:30:00 * Date/Time End: 2024-10-09T11:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Size:
5 datasets
Download Data (login required; moratorium until 2026-03-17)
Datasets listed in this bundled publication
- Diefendorf, AF; Dietrich, W; Naake, HH et al. (in review): Highly branched isoprenoids in lake sediments. https://doi.pangaea.de/10.1594/PANGAEA.979555
- Diefendorf, AF; Dietrich, W; Naake, HH et al. (in review): Lake water sample chemistry. https://doi.pangaea.de/10.1594/PANGAEA.979618
- Diefendorf, AF; Dietrich, W; Naake, HH et al. (in review): Lake water Secchi disk depth. https://doi.pangaea.de/10.1594/PANGAEA.979646
- Diefendorf, AF; Dietrich, W; Naake, HH et al. (in review): Highly branched isoprenoids in lake photic zone water. https://doi.pangaea.de/10.1594/PANGAEA.979616
- Diefendorf, AF; Dietrich, W; Naake, HH et al. (in review): Lake water chemistry profiles. https://doi.pangaea.de/10.1594/PANGAEA.979617