Effects of global warming on biodiversity and food chain in paddy field soil, as revealed by FACE experiment

2013 Fiscal Year Final Research Report

• Project/Area Number: 23580464
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Boundary agriculture
• Research Institution: National Institute for Agro-Environmental Sciences
• Principal Investigator: OKADA Hiroaki 独立行政法人農業環境技術研究所, 生物生態機能研究領域, 主任研究員 (30355333)
• Co-Investigator(Renkei-kenkyūsha): HASEGAWA Toshihiro 農業環境技術研究所, 生物生態機能研究領 域, 上席研究員 (10228455) ; TOKIDA Takeshi 農業環境技術研究所, 物質循環研究領域, 任期付研究員 (20585856) ; MATUSHIMA Miwa 千葉大学, 園芸学研究科, 助教 (60527927)
• Project Period (FY): 2011 – 2013
• Keywords: 地球温暖化 / CO2濃度 / 温度 / 水田生態系 / 土壌 / 線虫 / 水稲 / 微生物

Research Abstract

We examined from May to August in 2011 and 2012, rice root, microbial and nematode densities in surface soil in paddy field, where CO2 concentration and/or temperature were elevated to evaluate how climate change 50 years later could affect paddy soil food web. Rice root density tended to increase as CO2 and temperature elevated, although the significance was not consistent. Microbial density (total DNA extracted from soil) was significantly reduced by elevated temperature. Densities of rice root nematodes and fungal feeding nematodes were consistently reduced by elevated temperature as well. In conclusion, elevated temperature negatively affected soil microbes and animals, whereas effect of elevated CO2 was small or unclear.

Research Products

• [Journal Article] Elevated temperature has stronger effects on the soil food web of a flooded paddy than does CO2 (2014)
  • Author(s): Okada, H., H, Sakai., T, Tokida., Y, Usui., H, Nakamura. and T, Hasegawa
  • Journal Title: Soil Biology & Biochemistry Volume: 70 Pages: 166-175
  • Peer Reviewed
• [Presentation] 農耕地の土壌線虫群集の環境応答 (2014)
  • Author(s): 岡田浩明
  • Organizer: 日本生態学会第61回全国大会
  • Place of Presentation: (T0-1)
  • Year and Date: 20140000
• [Presentation] Impacts of global warming on soil food web in rice paddy field (2013)
  • Author(s): Okada, H, H. Sakai, T. Tokida, Y. Usui, H. Nakamura and T. Hasegawa
  • Organizer: Society of Nematologists 52nd Annual Meeting
  • Place of Presentation: (Abstracts, 85-86)
  • Year and Date: 20130000
• [Presentation] 地球温暖化が水田の水稲、土壌微生物及び線虫に及ぼす影響 (2013)
  • Author(s): 岡田浩明、酒井英光、常田岳志、臼井靖浩、中村浩史、長谷川利拡
  • Organizer: 日本土壌動物学会第36回大会講演要旨集
  • Place of Presentation: (33)
  • Year and Date: 20130000
• [Presentation] CO2濃度と窒素肥料が水田の線虫群集に及ぼす影響 (2013)
  • Author(s): 岡田浩明、酒井英光、常田岳志、臼井靖浩、中村浩史、長谷川利拡
  • Organizer: 日本線虫学会第21回大会講演予稿集
  • Place of Presentation: (26)
  • Year and Date: 20130000
• [Presentation] 地球温暖化が水田の土壌生物に及ぼす影響 (2013)
  • Author(s): 岡田浩明、酒井英光、常田岳志、中村浩史、長谷川利拡
  • Organizer: 日本生態学会第60回大会講演要旨集
  • Place of Presentation: (305)
  • Year and Date: 20130000
• [Presentation] Nematode community as an environmental indicator (2012)
  • Author(s): Okada, H.
  • Organizer: Korea-Japan Joint Symposium on Nematology
  • Place of Presentation: (Abstract, 47-48)
  • Year and Date: 20120000
• [Presentation] 地球温暖化が水田の土壌生物群集に及ぼす影響の解明-ネモグリセンチュウ密度への影響- (2012)
  • Author(s): 岡田浩明、朱春梧、酒井英光、常田岳志、中村浩史、長谷川利拡
  • Organizer: 日本線虫学会第20会大会講演要旨集、47
  • Year and Date: 20120000
• [Presentation] 地球温暖化が水田の土壌小動物群集に及ぼす影響―FACE試験による解明―(予報) (2011)
  • Author(s): 岡田浩明、浦田悦子、長谷川利拡、常田岳志
  • Organizer: 第58回日本生態学会講演要旨集、2207
  • Year and Date: 20110000