CO2 Flux from Tundra Lichen, Moss, and Tussock, Council, Alaska: Assessment of Spatial Representativeness
CO2 flux-measurement in dominant tundra vegetation on the Seward Peninsula of Alaska was examined for spatial representativeness, using a manual chamber system. In order to assess the representativeness of CO2 flux, a 40 m × 40 m (5-m interval; 81 total points) plot was used in June, August, and Sep...
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ftunivalaska:oai:scholarworks.alaska.edu:11122/10999 2023-05-15T18:19:19+02:00 CO2 Flux from Tundra Lichen, Moss, and Tussock, Council, Alaska: Assessment of Spatial Representativeness Kim, Yongwon Chae, Namyi Lee, Bangyong 2012-12 http://hdl.handle.net/11122/10999 en_US eng http://hdl.handle.net/11122/10999 Research Subject Categories::NATURAL SCIENCES::Biology::Terrestrial freshwater and marine ecology::Terrestrial ecology Poster 2012 ftunivalaska 2023-02-23T21:37:36Z CO2 flux-measurement in dominant tundra vegetation on the Seward Peninsula of Alaska was examined for spatial representativeness, using a manual chamber system. In order to assess the representativeness of CO2 flux, a 40 m × 40 m (5-m interval; 81 total points) plot was used in June, August, and September of 2011. Average CO2 fluxes in lichen, moss, and tussock tundra were 3.4 ± 2.7, 4.5 ± 2.9, and 7.2 ± 5.7 mgCO2/m2/m during growing season, respectively, suggesting that tussock tundra is a significant CO2 source, especially considering the wide distribution of tussock tundra in the circumpolar region. Further, soil temperature, rather than soil moisture, held the key role in regulating CO2 flux at the study site: CO2 flux from tussock increased linearly as soil temperature increased, while the flux from lichen and moss followed soil temperature nearly exponentially, reflecting differences in surface area covered by the chamber system. Regarding sample size, the 81 total sampling points over June, August, and September satisfy an experimental average that falls within ±10% of full sample average, with a 95% confidence level. However, the number of sampling points for each variety of vegetation during each month must provide at least ±20%, with an 80% confidence level. In order to overcome the logistical constraints, we were required to identify the site’s characteristics with a manual chamber system over a 40 m × 40 m plot and to subsequently employ an automated chamber for spatiotemporal representativeness. This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF-C1ABA001-2011-0021063) Still Image Seward Peninsula Tundra Alaska University of Alaska: ScholarWorks@UA |
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University of Alaska: ScholarWorks@UA |
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ftunivalaska |
language |
English |
topic |
Research Subject Categories::NATURAL SCIENCES::Biology::Terrestrial freshwater and marine ecology::Terrestrial ecology |
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Research Subject Categories::NATURAL SCIENCES::Biology::Terrestrial freshwater and marine ecology::Terrestrial ecology Kim, Yongwon Chae, Namyi Lee, Bangyong CO2 Flux from Tundra Lichen, Moss, and Tussock, Council, Alaska: Assessment of Spatial Representativeness |
topic_facet |
Research Subject Categories::NATURAL SCIENCES::Biology::Terrestrial freshwater and marine ecology::Terrestrial ecology |
description |
CO2 flux-measurement in dominant tundra vegetation on the Seward Peninsula of Alaska was examined for spatial representativeness, using a manual chamber system. In order to assess the representativeness of CO2 flux, a 40 m × 40 m (5-m interval; 81 total points) plot was used in June, August, and September of 2011. Average CO2 fluxes in lichen, moss, and tussock tundra were 3.4 ± 2.7, 4.5 ± 2.9, and 7.2 ± 5.7 mgCO2/m2/m during growing season, respectively, suggesting that tussock tundra is a significant CO2 source, especially considering the wide distribution of tussock tundra in the circumpolar region. Further, soil temperature, rather than soil moisture, held the key role in regulating CO2 flux at the study site: CO2 flux from tussock increased linearly as soil temperature increased, while the flux from lichen and moss followed soil temperature nearly exponentially, reflecting differences in surface area covered by the chamber system. Regarding sample size, the 81 total sampling points over June, August, and September satisfy an experimental average that falls within ±10% of full sample average, with a 95% confidence level. However, the number of sampling points for each variety of vegetation during each month must provide at least ±20%, with an 80% confidence level. In order to overcome the logistical constraints, we were required to identify the site’s characteristics with a manual chamber system over a 40 m × 40 m plot and to subsequently employ an automated chamber for spatiotemporal representativeness. This work was supported by the National Research Foundation of Korea Grant funded by the Korean Government (MEST) (NRF-C1ABA001-2011-0021063) |
format |
Still Image |
author |
Kim, Yongwon Chae, Namyi Lee, Bangyong |
author_facet |
Kim, Yongwon Chae, Namyi Lee, Bangyong |
author_sort |
Kim, Yongwon |
title |
CO2 Flux from Tundra Lichen, Moss, and Tussock, Council, Alaska: Assessment of Spatial Representativeness |
title_short |
CO2 Flux from Tundra Lichen, Moss, and Tussock, Council, Alaska: Assessment of Spatial Representativeness |
title_full |
CO2 Flux from Tundra Lichen, Moss, and Tussock, Council, Alaska: Assessment of Spatial Representativeness |
title_fullStr |
CO2 Flux from Tundra Lichen, Moss, and Tussock, Council, Alaska: Assessment of Spatial Representativeness |
title_full_unstemmed |
CO2 Flux from Tundra Lichen, Moss, and Tussock, Council, Alaska: Assessment of Spatial Representativeness |
title_sort |
co2 flux from tundra lichen, moss, and tussock, council, alaska: assessment of spatial representativeness |
publishDate |
2012 |
url |
http://hdl.handle.net/11122/10999 |
genre |
Seward Peninsula Tundra Alaska |
genre_facet |
Seward Peninsula Tundra Alaska |
op_relation |
http://hdl.handle.net/11122/10999 |
_version_ |
1766196395644026880 |