Organic matter cycling along geochemical, geomorphic, and disturbance gradients in forest and cropla… - SLUB Dresden

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Titel: Organic matter cycling along geochemical, geomorphic, and disturbance gradients in forest and cropland of the African Tropics – project TropSOC database version 1.0

Beteiligte: Doetterl, Sebastian; Asifiwe, Rodrigue K.; Baert, Geert; Bamba, Fernando; Bauters, Marijn; Boeckx, Pascal; Bukombe, Benjamin; Cadisch, Georg; Cooper, Matthew; Cizungu, Landry N.; Hoyt, Alison; Kabaseke, Clovis; Kalbitz, Karsten; Kidinda, Laurent; Maier, Annina; Mainka, Moritz; Mayrock, Julia; Muhindo, Daniel; Mujinya, Basile B.; Mukotanyi, Serge M.; Nabahungu, Leon; Reichenbach, Mario; Rewald, Boris; Six, Johan; [...]

Erschienen: Copernicus GmbH, 2021

Sprache: Englisch

DOI: 10.5194/essd-13-4133-2021

ISSN: 1866-3516

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Beschreibung: Abstract. The African Tropics are hotspots of modern-day land use change and are, atthe same time, of great relevance for the cycling of carbon (C) andnutrients between plants, soils, and the atmosphere. However, theconsequences of land conversion on biogeochemical cycles are still largelyunknown as they are not studied in a landscape context that defines thegeomorphic, geochemical, and pedological framework in which biologicalprocesses take place. Thus, the response of tropical soils to disturbance byerosion and land conversion is one of the great uncertainties in assessingthe carrying capacity of tropical landscapes to grow food for futuregenerations and in predicting greenhouse gas fluxes from soils to theatmosphere and, hence, future earth system dynamics. Here we describe version 1.0 of an open-access database created as part ofthe project “Tropical soil organic carbon dynamics along erosionaldisturbance gradients in relation to variability in soil geochemistry andland use” (TropSOC). TropSOC v1.0 (Doetterl et al., 2021,https://doi.org/10.5880/fidgeo.2021.009) contains spatially and temporallyexplicit data on soil, vegetation, environmental properties, and landmanagement collected from 136 pristine tropical forest and cropland plotsbetween 2017 and 2020 as part of monitoring and sampling campaignsin the eastern Congo Basin and the East African Rift Valley system. Theresults of several laboratory experiments focusing on soil microbialactivity, C cycling, and C stabilization in soils complement the dataset todeliver one of the first landscape-scale datasets to study the linkages andfeedbacks between geology, geomorphology, and pedogenesis as controls onbiogeochemical cycles in a variety of natural and managed systems in theAfrican Tropics. The hierarchical and interdisciplinary structure of the TropSOC databaseallows linking of a wide range of parameters and observations on soil andvegetation dynamics along with other supporting information that may also bemeasured at one or more levels of the hierarchy. TropSOC's data mark asignificant contribution to improve our understanding of the fate ofbiogeochemical cycles in dynamic and diverse tropical African(agro-)ecosystems. TropSOC v1.0 can be accessed through the Supplementprovided as part of this paper or as a separate download viathe websites of the Congo Biogeochemistry Observatory and GFZ Data Serviceswhere version updates to the database will be provided as the projectdevelops.

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