Isoprene emission from Sphagnum species occupying different growth positions above the water table
Isoprene emission from Sphagnum species naturally growing at different positions above the water table were measured in a subarctic peatland and at monoliths from a temperate bog. Our objectives were to investigate (1) whether emission rates were species and/or moisture dependent, and (2) whether sh...
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Finnish Zoological and Botanical Publishing Board
2011
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ftulundlup:oai:lup.lub.lu.se:b6f8b468-24ce-471e-8ff2-8b6710e73864 2023-05-15T15:45:40+02:00 Isoprene emission from Sphagnum species occupying different growth positions above the water table Ekberg, Anna Arneth, Almut Holst, Thomas 2011 https://lup.lub.lu.se/record/1744991 eng eng Finnish Zoological and Botanical Publishing Board https://lup.lub.lu.se/record/1744991 wos:000287958600004 scopus:79952530338 Boreal Environment Research: An International Interdisciplinary Journal; 16(1), pp 47-59 (2011) ISSN: 1239-6095 Physical Geography contributiontojournal/article info:eu-repo/semantics/article text 2011 ftulundlup 2023-02-01T23:35:15Z Isoprene emission from Sphagnum species naturally growing at different positions above the water table were measured in a subarctic peatland and at monoliths from a temperate bog. Our objectives were to investigate (1) whether emission rates were species and/or moisture dependent, and (2) whether short-term temperature history had an influence on emission capacity. We expected greater emission capacities in moist than dry growing conditions, and from species adapted to wet habitats. We also expected that higher emission capacities would be found in response to elevated temperatures. Average peak growing season isoprene emission capacities (standardized to 20 degrees C and PAR 1000 mu mol m(-2) s(-1)) at the subarctic site were 106 and 74 mu g C m(-2) h(-1) from a S. balticum wet lawn and a S. balticum dry hummock/palsa, respectively. Emission capacities correlated strongly with gross primary productivity (GPP) and the average air temperature of the 48 hours prior to measurement (T-48), but the effect of T-48 seemed to be partly masked by the influence of GPP when moisture was not limiting. The laboratory experiments suggested that a typical hummock species, S. rubellum had higher capacity for isoprene emission than a typical lawn species S. magellanicum. Instantaneous emission rates increased with temperature, but no effect of temperature history was discernible. Sphagnum mosses are known to emit substantial amounts of isoprene, but in this study we also showed significant inter-species differences in emission capacity. The results imply that climate change induced alterations of peatland hydrology may change the total ecosystem isoprene source strength, as individual species adapt to new growth conditions or as a consequence of species succession. Article in Journal/Newspaper Boreal Environment Research palsa Subarctic Lund University Publications (LUP) |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Physical Geography |
spellingShingle |
Physical Geography Ekberg, Anna Arneth, Almut Holst, Thomas Isoprene emission from Sphagnum species occupying different growth positions above the water table |
topic_facet |
Physical Geography |
description |
Isoprene emission from Sphagnum species naturally growing at different positions above the water table were measured in a subarctic peatland and at monoliths from a temperate bog. Our objectives were to investigate (1) whether emission rates were species and/or moisture dependent, and (2) whether short-term temperature history had an influence on emission capacity. We expected greater emission capacities in moist than dry growing conditions, and from species adapted to wet habitats. We also expected that higher emission capacities would be found in response to elevated temperatures. Average peak growing season isoprene emission capacities (standardized to 20 degrees C and PAR 1000 mu mol m(-2) s(-1)) at the subarctic site were 106 and 74 mu g C m(-2) h(-1) from a S. balticum wet lawn and a S. balticum dry hummock/palsa, respectively. Emission capacities correlated strongly with gross primary productivity (GPP) and the average air temperature of the 48 hours prior to measurement (T-48), but the effect of T-48 seemed to be partly masked by the influence of GPP when moisture was not limiting. The laboratory experiments suggested that a typical hummock species, S. rubellum had higher capacity for isoprene emission than a typical lawn species S. magellanicum. Instantaneous emission rates increased with temperature, but no effect of temperature history was discernible. Sphagnum mosses are known to emit substantial amounts of isoprene, but in this study we also showed significant inter-species differences in emission capacity. The results imply that climate change induced alterations of peatland hydrology may change the total ecosystem isoprene source strength, as individual species adapt to new growth conditions or as a consequence of species succession. |
format |
Article in Journal/Newspaper |
author |
Ekberg, Anna Arneth, Almut Holst, Thomas |
author_facet |
Ekberg, Anna Arneth, Almut Holst, Thomas |
author_sort |
Ekberg, Anna |
title |
Isoprene emission from Sphagnum species occupying different growth positions above the water table |
title_short |
Isoprene emission from Sphagnum species occupying different growth positions above the water table |
title_full |
Isoprene emission from Sphagnum species occupying different growth positions above the water table |
title_fullStr |
Isoprene emission from Sphagnum species occupying different growth positions above the water table |
title_full_unstemmed |
Isoprene emission from Sphagnum species occupying different growth positions above the water table |
title_sort |
isoprene emission from sphagnum species occupying different growth positions above the water table |
publisher |
Finnish Zoological and Botanical Publishing Board |
publishDate |
2011 |
url |
https://lup.lub.lu.se/record/1744991 |
genre |
Boreal Environment Research palsa Subarctic |
genre_facet |
Boreal Environment Research palsa Subarctic |
op_source |
Boreal Environment Research: An International Interdisciplinary Journal; 16(1), pp 47-59 (2011) ISSN: 1239-6095 |
op_relation |
https://lup.lub.lu.se/record/1744991 wos:000287958600004 scopus:79952530338 |
_version_ |
1766380188098101248 |