Exploring a tree ecophysiological index to evaluate nitrogen saturation in forest ecosystems

• Project/Area Number: 18K11664
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 63040:Environmental impact assessment-related
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Watanabe Makoto 東京農工大学, (連合)農学研究科(研究院), 准教授 (50612256)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
• Keywords: 窒素飽和 / 指標 / 被食防衛 / 樹木生理生態学 / 大気汚染 / コナラ / 成木 / 窒素利用効率 / 樹木の窒素利用 / 成木調査

Outline of Final Research Achievements

The purpose of the present study is to determine the index for nitrogen saturation in the forest ecosystem from the viewpoint of tree physiological ecology. The plant material was konara oak, which is representative species in Satoyama-forest in Japan. I collected leaves from the crown of mature konara oak and analyze the traits. Concentrations of primary metabolite and secondary metabolite were decreased with increasing soil nitrogen availability. These results suggest that the leaf traits can be used as an index to estimate progress of nitrogen saturation in konara oak forest.

Academic Significance and Societal Importance of the Research Achievements

窒素飽和は森林の健全性を損ねる重要な環境問題の一つであるが、その評価は森林生態系への窒素のインプットとアウトプットを長期間モニタリングすることによって評価されてきた。本研究によってコナラの葉における一次代謝産物や二次代謝産物が、土壌の窒素利用性の違いを反映することが明らかになった。それによって、森林の窒素飽和の進行状況をより簡便に評価できる指標を入手できたと考えられる。

Research Products

• [Journal Article] Toward an impact assessment of ozone on plant carbon fixation using a process-based plant growth model: A case study of Fagus crenata grown under different soil nutrient levels (2020)
  • Author(s): Kinose Yoshiyuki、Fukamachi Yoshinobu、Okabe Shigeaki、Hiroshima Hiroka、Watanabe Makoto、Izuta Takeshi
  • Journal Title: Science of The Total Environment Volume: 716 Pages: 137008-137008
  • DOI: 10.1016/j.scitotenv.2020.137008
  • Peer Reviewed
• [Journal Article] Interactive effect of leaf age and ozone on mesophyll conductance in Siebold's beech (2020)
  • Author(s): Hoshika Yasutomo、Haworth Matthew、Watanabe Makoto、Koike Takayoshi
  • Journal Title: Physiologia Plantarum Volume: 170 Issue: 2 Pages: 172-186
  • DOI: 10.1111/ppl.13121
  • NAID: 120007151368
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Nitrogen use efficiency of <I>Quercus serrata</I> seedlings under different soil nitrogen and phosphorus supplies (2020)
  • Author(s): Zhu, B., Izuta, T. and Watanabe, M.
  • Journal Title: Journal of Agricultural Meteorology Volume: 76 Issue: 1 Pages: 11-18
  • DOI: 10.2480/agrmet.D-19-00032
  • NAID: 130007783858
  • ISSN: 0021-8588, 1881-0136
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Nitrogen use efficiency for growth of Fagus crenata seedlings under elevated ozone with different soil nutrient conditions (2020)
  • Author(s): Watanabe, M., Hiroshima, H., Kinose, Y., Okabe, S. and Izuta, T.
  • Journal Title: Forests Volume: 11(4) Issue: 4 Pages: 1-16
  • DOI: 10.3390/f11040371
  • Peer Reviewed / Open Access
• [Journal Article] Photosynthetic activity in relation to a gradient of leaf nitrogen content within a canopy of Siebold's beech and Japanese oak saplings under elevated ozone (2018)
  • Author(s): Watanabe Makoto、Hoshika Yasutomo、Inada Naoki、Koike Takayoshi
  • Journal Title: Science of The Total Environment Volume: 636 Pages: 1455-1462
  • DOI: 10.1016/j.scitotenv.2018.04.423
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 生育環境の異なるコナラ成木の樹冠内における葉の特性と虫害の関係 (2020)
  • Author(s): 則定優成, 伊豆田 猛, 渡辺 誠
  • Organizer: 第60回大気環境学会年会
• [Presentation] Nitrate contamination of mountainous headwater streams from adjacent agricultural and pasture lands beyond the watershed boundary in eastern Hokkaido, Japan (2020)
  • Author(s): Fukushima, K., Iwasaki, K., Sakai, M., Oda, Y., Onishi, Y., Koba, K., Katata, G., Yamaguchi, T., Kubota, T., Nagano, H., Watanabe, M., Koarashi, J.
  • Organizer: JpGU-AGU Joint Meeting 2020: Virtual
• [Presentation] 森林炭素・窒素循環研究：学術分野を超えた連携は必要か？ (2020)
  • Author(s): 堅田元喜, 福島慶太郎, 小嵐 淳, 山口高志, 渡辺 誠, 永野博彦, 中山理智, 舘野 隆之輔, 黄瀬佳之
  • Organizer: 第131回日本森林学会大会
• [Presentation] 生育環境の異なるコナラ成木の葉の特性と虫害の樹冠内における鉛直分布 (2020)
  • Author(s): 則定優成, 伊豆田 猛, 渡辺 誠
  • Organizer: 第131回日本森林学会大会
• [Presentation] Gradients of photosynthetic traits and defense capacity within a canopy of mature oak trees grown under different nutrient conditions (2019)
  • Author(s): Watanabe, M., Norisada, M. and Izuta, T.
  • Organizer: IUFRO Nanning 2019: Harmonized growth, cleaner environment and sustainable forests
  • Int'l Joint Research
• [Presentation] 土壌環境の異なるコナラ成木の樹冠内における光合成能力、成長および被食防衛能力の鉛直分布 (2019)
  • Author(s): 則定優成, 伊豆田 猛, 渡辺 誠
  • Organizer: 第60回大気環境学会年会
• [Presentation] 異なる土壌窒素およびリン環境で育成したコナラ苗の養分利用効率 (2019)
  • Author(s): 朱 本揮, 伊豆田 猛, 渡辺 誠
  • Organizer: 第60回大気環境学会年会
• [Presentation] 林縁と林内の窒素沈着量の違いが森林の生産性と光合成窒素利用特性に与える影響 (2019)
  • Author(s): 渡辺 誠, 則定 優成, 黄瀬佳之, 山口高志, 中山理智, 福島 慶太郎, 舘野 隆之輔, 永野博彦, 小嵐 淳, 堅田元喜
  • Organizer: 第60回大気環境学会年会
• [Presentation] Nitrogen use efficiency of Quercus serrata seedlings under different soil nitrogen and phosphorus supplies (2019)
  • Author(s): ZHU Benhui, IZUTA Takeshi, WATANABE Makoto
  • Organizer: International Symposium on Agricultural Meteorology
  • Int'l Joint Research
• [Book] 木本植物の生理生態 (2020)
  • Author(s): 小池 孝良、北尾 光俊、市栄 智明、渡辺 誠
  • Total Pages: 264
  • Publisher: 共立出版
  • ISBN: 9784320058125