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Plant communitier control long tern carbon accumulation and biogeochemical gradients in a Patagonian bog

Titelangaben

Mathijssen, Paul J .H. ; Galka, Mariusz ; Borken, Werner ; Knorr, Klaus-Holger:
Plant communitier control long tern carbon accumulation and biogeochemical gradients in a Patagonian bog.
In: Science of the Total Environment. Bd. 684 (September 2019) . - S. 670-681.
ISSN 0048-9697
DOI: https://doi.org/10.1016/j.scitotenv.2019.05.310

Abstract

Peat carbon accumulation is controlled by both large scale factors, such as climate and hydrological setting, and small scale factors, such as microtopography and plant community. These small scale factors commonly vary within peatlands and can cause variation in biogeochemical traits and carbon accumulation within the samesite. To understand these within-site variations, we investigated long termcarbon accumulation, peat decomposition, biogeochemistry of pore water and plant macrofossils along a transect in an ombrotrophic bog in southern Patagonia. An additional question we addressed is how historical deposition of volcanic ash on the peatland hasaffected its carbon balance.Variability in plant community and water table led to differences in long term peat and carbon accumulation (peat moss N cushion plant), organic matter decomposition (cushion plant N peat moss), and methane production (peat moss N cushion plant). Macrofossil analysis and radiocarbon dating indicated a relationship betweenplant community and carbon accumulation or decomposition during the historical succession of vegetation in the peatland. C/N ratio and isotopic signatures reflected variability in plant community as litter source, andDOC concentrations were controlled by humification level. Volcanic ash deposition had only limited effect on plant composition, but it was associated with increased decomposition in overlying peat layers. This study highlightsthe importance of understanding howplant communities develop, as changes in communities could significantly affect the potential of ombrotrophic peatlands as C sink.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER153356
Keywords: Southern peatlands; Carbon accumulation; Organic matter mineralization; Macrofossils; Microtopographic gradient; Stable isotopes
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie > Lehrstuhl Bodenökologie - Univ.-Prof. Dr. Eva Lehndorff
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
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
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
Eingestellt am: 29 Jan 2020 07:04
Letzte Änderung: 22 Mär 2022 12:35
URI: https://eref.uni-bayreuth.de/id/eprint/53865