Diefendorf, Aaron F; Dietrich, Watts; Naake, Hans H; Lowell, Thomas V; Corcoran, Megan C (2025): Highly branched isoprenoids in lake photic zone water [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.979616 (DOI registration in progress), In: Diefendorf, AF et al. (2025): Diatom-derived highly branched isoprenoids in lake waters and sediments [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.979496
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Published: 2025-04-14
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. Water samples from the photic zone were collected using an integrated water sampler. The integrated sample was designed to collect the water from the euphotic zone where phytoplankton are concentrated. Water was sampled from the euphotic zone (calculated as 2 times the Secchi disk depth) using an integrated water sampler fabricated from a 2 m long x 5.2 cm ID PVC pipe (2" nominal schedule 40 PVC pipe) fitted with a ball valve at the top. When the euphotic zone was >2 m, only the upper 2 m was sampled. When the euphotic zone intersected with the sediment/water interface, water was collected from the surface to 0.5 m above the sediment/water interface. Waters were filtered first through 1000 µm mesh filter and then onto a 0.7 µm glass fiber filter. Filters were extracted and analyzed by gas chromatography mass spectrometry.
Keyword(s):
Related 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 A (2025): Diatom-derived highly branched isoprenoids are diverse and widespread in lakes. Organic Geochemistry, 104993, https://doi.org/10.1016/j.orggeochem.2025.104993
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: 44.665008 * Median Longitude: -84.954895 * South-bound Latitude: 40.680845 * West-bound Longitude: -99.749450 * North-bound Latitude: 48.096390 * East-bound Longitude: -67.419880
Date/Time Start: 2022-05-25T14:45:00 * Date/Time End: 2023-05-12T10:00:00
Minimum Elevation: 59.0 m * Maximum Elevation: 595.0 m
Event(s):
DIA-22-IN_Martin-1w (Martin Lake) * Latitude: 41.564270 * Longitude: -85.384750 * Date/Time: 2022-05-26T09:45:00 * Elevation: 276.0 m * Location: United States of America * Method/Device: Water sample (WS)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Diefendorf, Aaron F | |||
| 2 | LATITUDE | Latitude | Diefendorf, Aaron F | Geocode | ||
| 3 | LONGITUDE | Longitude | Diefendorf, Aaron F | Geocode | ||
| 4 | ELEVATION | Elevation | m a.s.l. | Diefendorf, Aaron F | Geocode | |
| 5 | DEPTH, water | Depth water | m | Diefendorf, Aaron F | Geocode | |
| 6 | Depth, water, top/minimum | Depth water top | m | Diefendorf, Aaron F | ||
| 7 | Depth, water, bottom/maximum | Depth water bot | m | Diefendorf, Aaron F | ||
| 8 | DATE/TIME | Date/Time | Diefendorf, Aaron F | Geocode | ||
| 9 | Highly branched isoprenoids, C20 | C20 HBI | ng/l | Diefendorf, Aaron F | Gas chromatograph (Agilent GC 7890) with a quadrupole mass selective detector (MSD, Agilent 5975C ) | |
| 10 | Highly branched isoprenoids, C20:1 | C20:1 HBI | ng/l | Diefendorf, Aaron F | Gas chromatograph (Agilent GC 7890) with a quadrupole mass selective detector (MSD, Agilent 5975C ) | C20:1-ADK |
| 11 | n-Heptadecane | C17 | ng/l | Diefendorf, Aaron F | Gas chromatograph (Agilent GC 7890) with a quadrupole mass selective detector (MSD, Agilent 5975C ) | |
| 12 | Standard deviation, relative | Std dev r | % | Diefendorf, Aaron F | Gas chromatograph (Agilent GC 7890) with a quadrupole mass selective detector (MSD, Agilent 5975C ) |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
258 data points