Nitzsche, Kai Nils ; Kaiser, Michael ; Premke, Katrin ; Gessler, Arthur ; Ellerbrock, Ruth Heike ; Hoffmann, Carsten ; Kleeberg, Andreas ; Kayler, Zachary Eric (2017)
Organic matter distribution and retention along transects from hilltop to kettle hole within an agricultural landscape.
In: Biogeochemistry, 136 (1)
doi: 10.1007/s10533-017-0380-3
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
In agricultural landscapes, the spatio-temporal distribution of organic matter (OM) varies greatly across landscape structures and soil types. We investigated patterns of organic carbon (OC) content, polyvalent cations, and isotopic values for specific OM fractions along transects spanning topographic positions from erosional to depositional areas, including aquatic sediments within a single kettle hole. We hypothesized different drivers exist at different scales. At the transect scale, we hypothesized (1) landscape form and land management to explain patterns of isotopic and OC content from different OM fractions. At the aggregate scale, (2) we expected different OM-mineral associations to explain stabilized OM. We also hypothesized, (3) that shallow sediment δ13C and δ15N of the kettle hole reflected different terrestrial sources. We found that distinct differences in the OM turnover rates existed between the fractions suggesting that different processes are affecting the transformation rates that are recorded in the isotopic composition patterns. Erosion along with plant productivity drive mineral-associated fractions over the transect, while microbial decomposition and slurry influence freely available and aggregated OM fractions. The type and magnitude of OM-mineral associations changed along the transect while binding OM of different decomposition status. OM in mineral-associated fractions in kettle hole sediments were derived from clay- and silt-sized particles from the field, whereas OM in freely available and aggregated fractions potentially originated from macrophytes. We conclude that kettle holes constitute important sinks for terrestrial OM across the landscape.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Nitzsche, Kai Nils ; Kaiser, Michael ; Premke, Katrin ; Gessler, Arthur ; Ellerbrock, Ruth Heike ; Hoffmann, Carsten ; Kleeberg, Andreas ; Kayler, Zachary Eric |
| Art des Eintrags: | Bibliographie |
| Titel: | Organic matter distribution and retention along transects from hilltop to kettle hole within an agricultural landscape |
| Sprache: | Englisch |
| Publikationsjahr: | 2017 |
| Verlag: | Springer |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Biogeochemistry |
| Jahrgang/Volume einer Zeitschrift: | 136 |
| (Heft-)Nummer: | 1 |
| DOI: | 10.1007/s10533-017-0380-3 |
| Kurzbeschreibung (Abstract): | In agricultural landscapes, the spatio-temporal distribution of organic matter (OM) varies greatly across landscape structures and soil types. We investigated patterns of organic carbon (OC) content, polyvalent cations, and isotopic values for specific OM fractions along transects spanning topographic positions from erosional to depositional areas, including aquatic sediments within a single kettle hole. We hypothesized different drivers exist at different scales. At the transect scale, we hypothesized (1) landscape form and land management to explain patterns of isotopic and OC content from different OM fractions. At the aggregate scale, (2) we expected different OM-mineral associations to explain stabilized OM. We also hypothesized, (3) that shallow sediment δ13C and δ15N of the kettle hole reflected different terrestrial sources. We found that distinct differences in the OM turnover rates existed between the fractions suggesting that different processes are affecting the transformation rates that are recorded in the isotopic composition patterns. Erosion along with plant productivity drive mineral-associated fractions over the transect, while microbial decomposition and slurry influence freely available and aggregated OM fractions. The type and magnitude of OM-mineral associations changed along the transect while binding OM of different decomposition status. OM in mineral-associated fractions in kettle hole sediments were derived from clay- and silt-sized particles from the field, whereas OM in freely available and aggregated fractions potentially originated from macrophytes. We conclude that kettle holes constitute important sinks for terrestrial OM across the landscape. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Bodenmineralogie und Bodenchemie |
| Hinterlegungsdatum: | 08 Dez 2022 11:39 |
| Letzte Änderung: | 08 Dez 2022 11:39 |
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