Skip to Main Content
Land-use and hydroperiod affect kettle hole sediment carbon and nitrogen biogeochemistryAuthor(s): Kai Nils Nitzsche; Thomas Kalettka; Katrin Premke; Gunnar Lischeid; Arthur Gessler; Zachary Eric Kayler
Source: Science of The Total Environment
Publication Series: Scientific Journal (JRNL)
Station: Northern Research Station
Download Publication (1.0 MB)
DescriptionKettle holes are glaciofluvially created depressional wetlands that collect organic matter (OM) and nutrients from their surrounding catchment. Kettle holes mostly undergo pronounced wet-dry cycles. Fluctuations in water table, land-use, andmanagement can affect sediment biogeochemical transformations and perhaps threaten the carbon stocks of these unique ecosystems. We investigated sediment and water of 51 kettle holes in NE Germany that differ in hydroperiod (i.e. the duration of the wet period of a kettle hole) and land-use. Our objectiveswere 1) to test if hydroperiod and landmanagementwere imprinted on the isotopic values (δ13C, δ15N) and C:N ratios of the sediment OM, and 2) to characterize water loss dynamics and kettle hole-groundwater connectivity by measuring the stable δ18O and δD isotope values of kettle hole water over several years. We found the uppermost sediment layer reflected recent OM inputs and short-term processes in the catchment, including land-use and management effects. Deeper sediments recorded the degree to which OM is processed within the kettle hole related to the hydroperiod.We see clear indications for the effects of wet-dry cycles for all kettle holes, which can lead to the encroachment of terrestrial plants. We found that the magnitude of evaporation depended on the year, season, and land-use type, that kettle holes are temporarily coupled to shallow ground water, and, as such, kettle holes are described best as partially-closed to open systems.
- Check the Northern Research Station web site to request a printed copy of this publication.
- Our on-line publications are scanned and captured using Adobe Acrobat.
- During the capture process some typographical errors may occur.
- Please contact Sharon Hobrla, email@example.com if you notice any errors which make this publication unusable.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationNitzsche, Kai Nils; Kalettka, Thomas; Premke, Katrin; Lischeid, Gunnar; Gessler, Arthur; Kayler, Zachary Eric. 2017. Land-use and hydroperiod affect kettle hole sediment carbon and nitrogen biogeochemistry. Science of The Total Environment. 574: 46-56. https://doi.org/10.1016/j.scitotenv.2016.09.003.
KeywordsDepressional wetlands, Wet-dry cycles, Biogeochemical transformations, Stable isotopes
- Tracing the source of soil organic matter eroded from temperate forest catchments using carbon and nitrogen isotopes
- Visualizing land-use and management complexity within biogeochemical cycles of an agricultural landscape
- New Insights on Ecosystem Mercury Cycling Revealed by Stable Isotopes of Mercury in Water Flowing from a Headwater Peatland Catchment
XML: View XML