No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog
The nature of linkages between soil C and N cycling is important in the context of terrestrial ecosystem responses to global environmental change. Extracellular enzymes produced by soil microorganisms drive organic matter decomposition, and are considered sensitive indicators of soil responses to en...
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ftunivutrecht:oai:dspace.library.uu.nl:1874/308038 2023-07-23T04:17:28+02:00 No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog Weedon, J.T. Aerts, R. Kowalchuk, George van Bodegom, P.M. Sub Ecology and Biodiversity Ecology and Biodiversity 2014 application/pdf https://dspace.library.uu.nl/handle/1874/308038 en eng 0168-2563 https://dspace.library.uu.nl/handle/1874/308038 info:eu-repo/semantics/EmbargoedAccess Soil enzymes Stoichiometry Climate change Seasonality Sub-arctic Northern peatlands Article 2014 ftunivutrecht 2023-07-02T01:13:48Z The nature of linkages between soil C and N cycling is important in the context of terrestrial ecosystem responses to global environmental change. Extracellular enzymes produced by soil microorganisms drive organic matter decomposition, and are considered sensitive indicators of soil responses to environmental variation. We investigated the response of eight hydrolytic soil enzymes (four peptidases and four glycosidases) to experimental warming in a long-term climate manipulation experiment in a sub-arctic peat bog, to determine to what extent the response of these two functional groups are similar. We found no significant effect of experimental spring and summer warming and/or winter snow addition on either the potential activity or the temperature sensitivity (of Vmax) of any of the enzymes. However, strong and contrasting seasonal patterns in both variables were observed. All of the peptidases, as well as alpha-glucosidase, had lower potential activity at the end of summer (August) compared to the beginning (June). Conversely, beta-glucosidase had significantly higher potential activity in August. Peptidases had consistently higher temperature sensitivities in June compared to August, while all four glycosidases showed the opposite pattern. Our results suggest that warming effects on soil enzymes are small compared to seasonal differences, which are most likely mediated by the seasonality of substrate supply and microbial nutrient demand. Furthermore the contrasting seasonal patterns for glycosidases and peptidases suggest that enzyme-based models of soil processes need to allow for potential divergence between the production and activity of these two enzyme functional groups. Article in Journal/Newspaper Arctic Climate change Utrecht University Repository Arctic |
institution |
Open Polar |
collection |
Utrecht University Repository |
op_collection_id |
ftunivutrecht |
language |
English |
topic |
Soil enzymes Stoichiometry Climate change Seasonality Sub-arctic Northern peatlands |
spellingShingle |
Soil enzymes Stoichiometry Climate change Seasonality Sub-arctic Northern peatlands Weedon, J.T. Aerts, R. Kowalchuk, George van Bodegom, P.M. No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog |
topic_facet |
Soil enzymes Stoichiometry Climate change Seasonality Sub-arctic Northern peatlands |
description |
The nature of linkages between soil C and N cycling is important in the context of terrestrial ecosystem responses to global environmental change. Extracellular enzymes produced by soil microorganisms drive organic matter decomposition, and are considered sensitive indicators of soil responses to environmental variation. We investigated the response of eight hydrolytic soil enzymes (four peptidases and four glycosidases) to experimental warming in a long-term climate manipulation experiment in a sub-arctic peat bog, to determine to what extent the response of these two functional groups are similar. We found no significant effect of experimental spring and summer warming and/or winter snow addition on either the potential activity or the temperature sensitivity (of Vmax) of any of the enzymes. However, strong and contrasting seasonal patterns in both variables were observed. All of the peptidases, as well as alpha-glucosidase, had lower potential activity at the end of summer (August) compared to the beginning (June). Conversely, beta-glucosidase had significantly higher potential activity in August. Peptidases had consistently higher temperature sensitivities in June compared to August, while all four glycosidases showed the opposite pattern. Our results suggest that warming effects on soil enzymes are small compared to seasonal differences, which are most likely mediated by the seasonality of substrate supply and microbial nutrient demand. Furthermore the contrasting seasonal patterns for glycosidases and peptidases suggest that enzyme-based models of soil processes need to allow for potential divergence between the production and activity of these two enzyme functional groups. |
author2 |
Sub Ecology and Biodiversity Ecology and Biodiversity |
format |
Article in Journal/Newspaper |
author |
Weedon, J.T. Aerts, R. Kowalchuk, George van Bodegom, P.M. |
author_facet |
Weedon, J.T. Aerts, R. Kowalchuk, George van Bodegom, P.M. |
author_sort |
Weedon, J.T. |
title |
No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog |
title_short |
No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog |
title_full |
No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog |
title_fullStr |
No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog |
title_full_unstemmed |
No effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog |
title_sort |
no effects of experimental warming but contrasting seasonal patterns for soil peptidase and glycosidase enzymes in a sub-arctic peat bog |
publishDate |
2014 |
url |
https://dspace.library.uu.nl/handle/1874/308038 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change |
genre_facet |
Arctic Climate change |
op_relation |
0168-2563 https://dspace.library.uu.nl/handle/1874/308038 |
op_rights |
info:eu-repo/semantics/EmbargoedAccess |
_version_ |
1772179240528117760 |