Effects of long-term experimental warming on plants and soil microbes in a cool temperate semi-natural grassland in Japan

Mayuko Suzuki*, Nobuhiko Suminokura, Kenta Tanami, Shinpei Yoshitake, Shingo Masuda, Mitsutoshi Tomotsune, Hiroshi Koizumi

*この研究の対応する著者

研究成果: Article査読

4 被引用数 (Scopus)

抄録

To clarify the effects of long-term warming on ecosystem matter cycling, we conducted an in situ 7-year experimental warming (2009–2015) using infrared heaters in a cool temperate semi-natural grassland in Japan. We measured plant aboveground biomass, soil total C and N, soil inorganic N (NH4 +-N and NO3 -N), and soil microbial biomass for 7 years (2009–2015). We also measured heterotrophic respiration for 2 years (2013–2014) and assessed net N mineralization and nitrification in 2015. We found that warming immediately increased plant aboveground biomass, but this effect ceased in 2013. However, the soil microbial biomass was continuously depressed by warming. Soil inorganic N concentrations in warmed plots substantially increased in the later years of the experiment (2013–2015) and the potential net N mineralization rate was also higher than in the earlier years. In contrast, heterotrophic respiration decreased with warming in 2013–2014. Our observations indicate that long-term warming has a contrasting effect on plants and soil microbes. In addition, the warming could have different effects on subterranean C and N cycling. To enhance the accuracy of estimation of future climate change, it is essential to continuously observe the warming effects on ecosystems and to focus on the change in subterranean C and N cycling.

本文言語English
ページ(範囲)957-962
ページ数6
ジャーナルEcological Research
31
6
DOI
出版ステータスPublished - 2016 11 1
外部発表はい

ASJC Scopus subject areas

  • 生態、進化、行動および分類学

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