Carbon exchange rates in Polytrichum juniperinum moss of burned black spruce forest in interior Alaska

• Kim Yongwon

  International Arctic Research Center (IARC), University of Alaska Fairbanks (UAF), 930 Koyukuk Dr., Fairbanks, AK 99775-7335, USA

• Kodama Yuji

  Arctic Environmental Research Center, National Institute of Polar Research (NIPR), Tokyo 190-8518, Japan

• Shim Changsub

  Korea Adaptation Center for Climate Change, Korea Environment Institute (KEI), Seoul 122-706, South Korea

• Kushida Keiji

  College of Bioresource Sciences, Nihon University, Kanagawa 252-0880, Japan

抄録

The Boreal black spruce forest is highly susceptible to wildfire, and postfire changes in soil temperature and substrates have the potential to shift large areas of such an ecosystem from a net sink to a net source of carbon. In this paper, we examine CO2 exchange rates (e.g., NPP and Re) in juniper haircap moss (Polytrichum juniperinum) and microbial respiration in no-vegetation conditions using an automated chamber system in a five-year burned black spruce forest in interior Alaska during the fall season of 2009. Mean ± standard deviation microbial respiration and NEP (net ecosystem productivity) of juniper haircap moss were 0.27 ± 0.13 and 0.28 ± 0.38 gCO2/m2/hr, respectively. CO2 exchange rates and microbial respiration showed temporal variations following fluctuation in air temperature during the fall season, suggesting the temperature sensitivity of juniper haircap moss and soil microbes after fire. During the 45-day fall period, mean NEP of P. juniperinum moss was 0.49 ± 0.28 MgC/ha following the five-year-old forest fire. On the other hand, simulated microbial respiration normalized to a 10°C temperature might be stimulated by as much as 0.40 ± 0.23 MgC/ha. These findings demonstrate that the fire-pioneer species juniper haircap moss is a net C sink in the burned black spruce forest of interior Alaska.

収録刊行物

• Polar science

  Polar science 8 (2), 146-155, 2014-06

  国立極地研究所

キーワード

• Carbon exchan
• ge rates
• Microbial respiration
• Juniper haircap moss (Polytrichum juniperinum)
• Boreal black spruce forest
• Wildfire

詳細情報

• CRID: 1573105977762633856
• NII論文ID: 110009794531
• NII書誌ID: AA12240481
• ISSN: 18739652
• 本文言語コード: en
• データソース種別:
  • CiNii Articles