Methane emissions from wetlands and their relationship with vascular plants: an Arctic example
Abstract This paper investigates the relationship between vascular plant production and CH 4 emissions from an arctic wet tundra ecosystem in north‐east Greenland. Light intensity was manipulated by shading during three consecutive growing seasons (1998–2000). The shading treatment resulted in lower...
Published in: | Global Change Biology |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2001
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1046/j.1354-1013.2001.00044.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1354-1013.2001.00044.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1354-1013.2001.00044.x |
id |
crwiley:10.1046/j.1354-1013.2001.00044.x |
---|---|
record_format |
openpolar |
spelling |
crwiley:10.1046/j.1354-1013.2001.00044.x 2024-06-23T07:50:24+00:00 Methane emissions from wetlands and their relationship with vascular plants: an Arctic example Joabsson, Anna Christensen, Torben Røjle 2001 http://dx.doi.org/10.1046/j.1354-1013.2001.00044.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1354-1013.2001.00044.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1354-1013.2001.00044.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Global Change Biology volume 7, issue 8, page 919-932 ISSN 1354-1013 1365-2486 journal-article 2001 crwiley https://doi.org/10.1046/j.1354-1013.2001.00044.x 2024-06-06T04:24:19Z Abstract This paper investigates the relationship between vascular plant production and CH 4 emissions from an arctic wet tundra ecosystem in north‐east Greenland. Light intensity was manipulated by shading during three consecutive growing seasons (1998–2000). The shading treatment resulted in lower carbon cycling in the ecosystem as mean seasonal net ecosystem exchange (NEE) decreased from −336 to −196 mg CO 2 m −2 h −1 and from −476 to −212 mg CO 2 m −2 h −1 in 1999 and 2000, respectively, and total ecosystem respiration decreased from 125 to 94 mg CO 2 m −2 h −1 in 1999 and from 409 to 306 mg CO 2 m −2 h −1 in 2000. Seasonal mean CH 4 emissions in controls and shaded plots were, respectively, 6.5 and 4.5 mg CH 4 m −2 h −1 in 1999 and 8.3 and 6.2 mg CH 4 m −2 h −1 in 2000. We found that CH 4 emission was sensitive to NEE and carbon turnover, and it is reasonable to assume that the correlation was due to a combined effect of vegetative CH 4 transport and substrate quality coupled to vascular plant production. Total above‐ground biomass was correlated to mean seasonal CH 4 emission, but separation into species showed that plant‐mediated CH 4 transport was highly species dependent. Potential CH 4 production peaked at the same depth as maximum root density (5–15 cm) and treatment differences further suggest that substrate quality was negatively affected by decreased NEE in the shaded plots. The concentration of dissolved CH 4 decreased in the control plots as the growing season progressed while it was relatively stable in the shaded plots. This suggests that a progressively better developed root system in the controls increased the capacity to transport CH 4 from the soil to the atmosphere. In conclusion, vascular plant photosynthetic rate and subsequent allocation of recently fixed carbon to below‐ground structures seemed to influence both vegetative CH 4 transport and substrate quality. Article in Journal/Newspaper Arctic East Greenland Greenland Tundra Wiley Online Library Arctic Greenland Global Change Biology 7 8 919 932 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract This paper investigates the relationship between vascular plant production and CH 4 emissions from an arctic wet tundra ecosystem in north‐east Greenland. Light intensity was manipulated by shading during three consecutive growing seasons (1998–2000). The shading treatment resulted in lower carbon cycling in the ecosystem as mean seasonal net ecosystem exchange (NEE) decreased from −336 to −196 mg CO 2 m −2 h −1 and from −476 to −212 mg CO 2 m −2 h −1 in 1999 and 2000, respectively, and total ecosystem respiration decreased from 125 to 94 mg CO 2 m −2 h −1 in 1999 and from 409 to 306 mg CO 2 m −2 h −1 in 2000. Seasonal mean CH 4 emissions in controls and shaded plots were, respectively, 6.5 and 4.5 mg CH 4 m −2 h −1 in 1999 and 8.3 and 6.2 mg CH 4 m −2 h −1 in 2000. We found that CH 4 emission was sensitive to NEE and carbon turnover, and it is reasonable to assume that the correlation was due to a combined effect of vegetative CH 4 transport and substrate quality coupled to vascular plant production. Total above‐ground biomass was correlated to mean seasonal CH 4 emission, but separation into species showed that plant‐mediated CH 4 transport was highly species dependent. Potential CH 4 production peaked at the same depth as maximum root density (5–15 cm) and treatment differences further suggest that substrate quality was negatively affected by decreased NEE in the shaded plots. The concentration of dissolved CH 4 decreased in the control plots as the growing season progressed while it was relatively stable in the shaded plots. This suggests that a progressively better developed root system in the controls increased the capacity to transport CH 4 from the soil to the atmosphere. In conclusion, vascular plant photosynthetic rate and subsequent allocation of recently fixed carbon to below‐ground structures seemed to influence both vegetative CH 4 transport and substrate quality. |
format |
Article in Journal/Newspaper |
author |
Joabsson, Anna Christensen, Torben Røjle |
spellingShingle |
Joabsson, Anna Christensen, Torben Røjle Methane emissions from wetlands and their relationship with vascular plants: an Arctic example |
author_facet |
Joabsson, Anna Christensen, Torben Røjle |
author_sort |
Joabsson, Anna |
title |
Methane emissions from wetlands and their relationship with vascular plants: an Arctic example |
title_short |
Methane emissions from wetlands and their relationship with vascular plants: an Arctic example |
title_full |
Methane emissions from wetlands and their relationship with vascular plants: an Arctic example |
title_fullStr |
Methane emissions from wetlands and their relationship with vascular plants: an Arctic example |
title_full_unstemmed |
Methane emissions from wetlands and their relationship with vascular plants: an Arctic example |
title_sort |
methane emissions from wetlands and their relationship with vascular plants: an arctic example |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1046/j.1354-1013.2001.00044.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1354-1013.2001.00044.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1354-1013.2001.00044.x |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic East Greenland Greenland Tundra |
genre_facet |
Arctic East Greenland Greenland Tundra |
op_source |
Global Change Biology volume 7, issue 8, page 919-932 ISSN 1354-1013 1365-2486 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1354-1013.2001.00044.x |
container_title |
Global Change Biology |
container_volume |
7 |
container_issue |
8 |
container_start_page |
919 |
op_container_end_page |
932 |
_version_ |
1802641283007643648 |