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Black carbon in grassland ecosystems of the world

Titelangaben

Rodionov, Andrej ; Amelung, Wulf ; Peinemann, Norman ; Haumaier, Ludwig ; Zhang, Xudong ; Kleber, Markus ; Glaser, Bruno ; Urusevskaja, Inga ; Zech, Wolfgang:
Black carbon in grassland ecosystems of the world.
In: Global Biogeochemical Cycles. Bd. 24 (2010) Heft 3 . - GB3013.
ISSN 0886-6236
DOI: https://doi.org/10.1029/2009GB003669

Abstract

Black carbon (BC) is the product of incomplete burning processes and a significant component of the passive soil organic carbon (SOC) pool. The role of BC in the globalcarbon cycle is still unclear. This study aimed to quantify and characterize BC in major grassland ecosystems of the world. Twenty‐eight representative soil profiles (mainly Mollisols) were sampled in the Russian Steppe, the U.S. Great Plains, the ArgentinianPampa, the Manchurian Plains in China, and the Chernozem region in central Germany. Black carbon contents were estimated using benzene polycarboxylic acids (BPCA) as a molecular marker, and indications about the origin of the BC were derived from bulk andcompound‐specific d13C analyses and radiocarbon dating of bulk soil organic matter (SOM). Our findings suggest that between 5% and 30% of SOC stocks consist of BC. Maximum BC contributions to SOC frequently were found at deeper parts of the A horizon with 14C ages younger than 7000 years BP; that is, incorporation of C as charred particles accompanied ecosystem development since the mid‐Holocene. Most of this BCformed from local vegetation, as indicated by a 13C isotope signature similar to that of bulkSOM. At some sites, also nonlocal sources contributed to soil BC, e.g., fossil fuel BC inputs at the German sites. Black carbon stocks were highest in Chernozems and lowest in Kastanozems. The Russian Steppe and Chinese Manchurian sites stored about 3–4 timesmore BC (around 3 kg m−2) than did the other sites because of thicker A horizons that were rich in BC. On a global scale, we estimate that steppe ecosystems contain between 4 and 17 Pg BC.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER81310
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenphysik
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 29 Jun 2015 06:09
Letzte Änderung: 04 Apr 2016 08:48
URI: https://eref.uni-bayreuth.de/id/eprint/15500