Effects of elevated CO2 on fen peat biogeochemistry

Hojeong Kang, Chris Freeman, Trevor W. Ashendon

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Effects of elevated atmospheric CO2 concentration on northern peatland biogeochemistry was studied in a short-term experiment. Eight intact soil cores (11-cm diameter × 40-cm depth) with Juncus and Festuca spp. were collected from a calcareous fen in north Wales. Half of the cores were incubated under 350 ppm CO2 concentration, whilst the other four cores were maintained at 700 ppm CO2. After a 4-month incubation, significantly higher biomass (root + shoot + algal mat) was determined under elevated CO2 conditions. Higher emissions of N2O and CO2, and higher concentration of pore-water DOC (dissolved organic carbon) were also observed under elevated CO2. However, no significant differences were found in CH4 emission or soil enzyme activities (β-glucosidase, phosphatase, and N-acetylglucosaminidase) in the bulk soil. Overall, the results suggest that elevated CO2 would increase the primary productivity of the fen vegetation, and stimulate N2O and CO2 emissions as a consequence of an enhanced DOC supply from the vegetation to the soil microbes.

Original languageEnglish
Pages (from-to)45-50
Number of pages6
JournalScience of the Total Environment
Volume279
Issue number1-3
DOIs
Publication statusPublished - 2001 Nov 12

Fingerprint

Biogeochemistry
Peat
fen
biogeochemistry
peat
Soils
Organic carbon
dissolved organic carbon
soil
algal mat
Acetylglucosaminidase
vegetation
Phosphatases
Enzyme activity
Phosphoric Monoester Hydrolases
peatland
phosphatase
enzyme activity
porewater
Biomass

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution

Cite this

Kang, Hojeong ; Freeman, Chris ; W. Ashendon, Trevor. / Effects of elevated CO2 on fen peat biogeochemistry. In: Science of the Total Environment. 2001 ; Vol. 279, No. 1-3. pp. 45-50.
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Effects of elevated CO2 on fen peat biogeochemistry. / Kang, Hojeong; Freeman, Chris; W. Ashendon, Trevor.

In: Science of the Total Environment, Vol. 279, No. 1-3, 12.11.2001, p. 45-50.

Research output: Contribution to journalArticle

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