caa a22 4500 477111572 CHVBK 20180405111610.0 cr unu---uuuuu 170330e19960301xx s 000 0 eng 10.1007/BF00015418 doi (NATIONALLICENCE)springer-10.1007/BF00015418 Microbial activity and enzymic decomposition processes following peatland water table drawdown [Elektronische Daten] [C. Freeman, G. Liska, N. Ostle, M. Lock, B. Reynolds, J. Hudson] Microbial activity and enzymic decomposition processes were followed during a field-based experimental lowering of the water table in a Welsh peatland. Respiration was not significantly affected by the treatment. However, the enzymes sulphatase, β-glucosidase and phosphatase were stimulated by between 31 and 67% upon water table drawdown. A further enzyme, phenol oxidase, was not significantly affected. The observation of elevated enzyme activities without an associated increase in microbial respiratory activity suggests that drought conditions influence peatland mineralisation rates through a direct stimulation of existing enzymes, rather than through a generalised stimulation of microbial metabolism (with associated de-novo enzyme synthesis). Hydrochemical data suggest that the stimulation may have been caused by a reduction in the inhibitory action of iron and phenolics in the peat pore waters. Overall, the findings support the recent hypothesis that drier conditions associated with climate change could stimulate mineralisation within wetlands. ei]R Merckx Kluwer Academic Publishers, 1996 biogeochemistry nationallicence climate change nationallicence enzyme nationallicence microbial activity nationallicence peat nationallicence water table nationallicence wetland nationallicence Freeman C. School of Biological Sciences, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut Liska G. School of Biological Sciences, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut Ostle N. School of Biological Sciences, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut Lock M. School of Biological Sciences, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut Reynolds B. Institute of Terrestrial Ecology, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut Hudson J. Institute of Hydrology, Staylittle, SY19 7DB, Llanbrynmair, Powys, UK aut Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl 180/1(1996-03-01), 121-127 0032-079X 180:1<121 1996 180 11104 https://doi.org/10.1007/BF00015418 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00015418 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Freeman C. School of Biological Sciences, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut NATIONALLICENCE 700 1- Liska G. School of Biological Sciences, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut NATIONALLICENCE 700 1- Ostle N. School of Biological Sciences, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut NATIONALLICENCE 700 1- Lock M. School of Biological Sciences, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut NATIONALLICENCE 700 1- Reynolds B. Institute of Terrestrial Ecology, University of Wales, LL57 2UW, Bangor, Gwynedd, UK aut NATIONALLICENCE 700 1- Hudson J. Institute of Hydrology, Staylittle, SY19 7DB, Llanbrynmair, Powys, UK aut NATIONALLICENCE 773 0- Plant and Soil Kluwer Academic Publishers; gopher://gopher.wkap.nl/ 180/1(1996-03-01), 121-127 0032-079X 180:1<121 1996 180 11104 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer