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

Title data

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. Vol. 684 (September 2019) . - pp. 670-681.
ISSN 1879-1026
DOI: https://doi.org/10.1016/j.scitotenv.2019.05.310

Abstract in another language

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.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER153356
Keywords: Southern peatlands; Carbon accumulation; Organic matter mineralization; Macrofossils; Microtopographic gradient; Stable isotopes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology > Chair Soil Ecology - Univ.-Prof. Dr. Eva Lehndorff
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: Yes
DDC Subjects: 500 Science
500 Science > 550 Earth sciences, geology
Date Deposited: 29 Jan 2020 07:04
Last Modified: 29 Jan 2020 07:04
URI: https://eref.uni-bayreuth.de/id/eprint/53865