Carbon allocation to mycorrhizal respiration in forested ecosystem

• Project/Area Number: 15K18711
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Forest science
• Research Institution: Tokyo University of Agriculture (2016); Kyoto University (2015)
• Principal Investigator: Imai Nobuo 東京農業大学, 地域環境科学部, 准教授 (00722638)
• Research Collaborator: KOMINAMI Yuji ; YOSHIMURA Ken-ichi ; ATAKA Mieko ; OSTONEN Ivika
• Project Period (FY): 2015-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
• Keywords: 菌根菌 / 森林 / 炭素動態 / 呼吸 / 土壌微生物 / 土壌

Outline of Final Research Achievements

Soil respiration consists of CO2 fluxes from free-living microbes, plant roots, and mycorrhizal fungi. Understanding the spatio-temporal pattern of CO2 fluxes from the three components can contribute to better understanding of soil organic matter dynamics, and in turn, prediction of global carbon dynamics. Many studies have measured root respiration and soil microbial respiration. However, mycorrhizal fungal respiration has been rarely measured, largely due to the lack of appropriate measuring method.
Here we developed a measuring method for ecto-mycorrhizal fungal respiration by using micro-pore mesh in-growth core. We first, in the field, examined the effects of host plants and soil nutrient availability on ecto-mycorrhizal fungal respiration.

Research Products

• [Journal Article] Response of tree species diversity to disturbance in humid tropical forests of Borneo (2016)
  • Author(s): Imai N, Samejima H, Demies M, Tanaka A, Sugau JB, Pereira JT, Kitayama K
  • Journal Title: Journal of Vegetation Science Volume: 27 Issue: 4 Pages: 739-748
  • DOI: 10.1111/jvs.12401
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Soil nutrients and size-dependent tree dynamics of tropical lowland forests on volcanic and sedimentary substrates in Sabah, Malaysian Borneo (2016)
  • Author(s): Aoyagi R, Imai N, Seino T, Kitayama K
  • Journal Title: Tropics Volume: 25 Issue: 2 Pages: 43-52
  • DOI: 10.3759/tropics.MS15-13
  • NAID: 130005262012
  • ISSN: 0917-415X, 1882-5729
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Large-scale mapping of tree-community composition as a surrogate of forest degradation in Bornean tropical rain forests. (2016)
  • Author(s): Shogoro Fujiki, Ryota Aoyagi, Atsushi Tanaka, Nobuo Imai, Arif Data Kusma, Yuyun Kurniawan, Ying Fah Lee, John Baptist Sugau, Joan T. Pereira, Hiromitsu Samejima and Kanehiro Kitayama
  • Journal Title: Land Volume: 5(4) Issue: 4 Pages: 45-45
  • DOI: 10.3390/land5040045
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] 菌根菌糸の呼吸速度測定手法の開発 (2017)
  • Author(s): 今井伸夫, 安宅未央子, Holger Schaefer, 吉村謙一, 小南裕志
  • Organizer: 日本生態学会第64回全国大会
  • Place of Presentation: 早稲田大学（東京都）
  • Year and Date: 2017-03-16
• [Presentation] Dependence of P-limited tropical rainforest trees on different soil organic P fractions as a P source inferred from an NP fertilization experiment in Borneo (2016)
  • Author(s): Yokoyamada D, Imai N, Kitayama K
  • Organizer: Association of Tropical Biology and Conservation
  • Place of Presentation: モンペリエ（フランス）
  • Year and Date: 2016-06-21
  • Int'l Joint Research
• [Remarks] 今井伸夫個人ページ
  • URL: http://nobuoimai.web.fc2.com/index.html