KOPRI Repository

Spatial characteristics of ecosystem respiration in three tundra ecosystems of Alaska

Cited 1 time in scopus
Metadata Downloads
Title
Spatial characteristics of ecosystem respiration in three tundra ecosystems of Alaska
Other Titles
알래스카의 툰드라 생태계에서의 공간적 특성
Authors
Kim Yongwon
Kushida Keiji
Suzuki Rikie
Lee, Bang Yong
Subject
Environmental Sciences & Ecology; Geology
Keywords
Ecosystem respiration; Spatial characteristics; Tundra; Alaska
Issue Date
2016
Citation
Kim Yongwon, et al. 2016. "Spatial characteristics of ecosystem respiration in three tundra ecosystems of Alaska". POLAR SCIENCE, 10(3): 356-363.
Abstract
Ecosystem respiration (ER) is a significant source within the carbon budget of tundra 3 themselves vulnerable to permafrost degradation, expansion of shrub extent, and shortening of 4 the snow-covered period in response to a changing Arctic climate. Here, we report on our 5 assessment of the spatial characteristics of ecosystem respiration, using a manual chamber 6 over three different tundra ecosystems in Alaska. Short growing-season ERs were 648, 653, and 653 mg C m2 for normalized air temperature (AT) and 668, 564, and 587 mg C m2 7 for in-situ 8 temperature (ST) at sites in Council, the upland tundra of the North Slope, and within the Arctic 9 National Wildlife Refuge (ANWR), respectively, corresponding to 63, 74, and 65 % (AT), and 10 64, 56, and 71 % (ST) of annual ecosystem respiration at each tundra site. Hence, soil 11 at a depth of 5 cm was an important driver in modulating the respiration over tundra, suggesting 12 soil temperature elucidates > 80 % of air temperature. At the Council site, a total of 81 sampling 13 points for each month are required for the manual chamber system to attain an experimentally 14 spatial representativeness for respiration falling within ±10 % of the full sample mean, with a 15 95 % confidence level. At the North Slope and ANWR sites, the number of sampling points for 16 each species during each month was chosen to yield results within at least ±20 %, with a 90 % 17 confidence level. Further, the respiration measuring frequency for each species must increase to 18 also satisfy at least this ±20 % and 90 % confidence level. These findings suggest that the use of 19 larger volume manual chamber and/or measurement frequency at 50 or more points can 20 logistical constraints and subsequently determine representatively mean ecosystem respiration at 21 each tundra site. Page 2 of 24
URI
http://repository.kopri.re.kr/handle/201206/6299
DOI
http://dx.doi.org/10.1016/j.polar.2015.12.001
Files in This Item
General Conditions
      ROMEO Green
    Can archive pre-print and post-print or publisher's version/PDF
      ROMEO Blue
    Can archive post-print (ie final draft post-refereeing) or publisher's version/PDF
      ROMEO Yellow
    Can archive pre-print (ie pre-refereeing)
      ROMEO White
    Archiving not formally supported

    qrcode

    Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

    Browse