ユートロフィケーションは,天然の草原の多様性の安定効果を弱める
Yann Hautier1, Eric W Seabloom2, Elizabeth T Borer2
11] Department of Ecology, Evolution, and Behavior, University of Minnesota, St Paul, Minnesota 55108, USA [2] Institute of Evolutionary Biology and Environmental Studies, University of Zurich, 8057 Zurich, Switzerland.
Nature
|February 18, 2014
まとめ
植物多様性は,種のアシンクロニーを通じて草原の生産性を安定させる. しかし,受精により,この効果は現実世界の生態系で弱まり,生態系サービスに影響を与えます.
科学分野:
- エコロジー エコロジー エコロジー
- 環境科学 環境科学
- グローバル・チェンジ 生物学 生物学
背景:
- 実験的研究によると,植物多様性は,種のアシンクロニーを通じて生産性を安定させる.
- 人為的な地球規模の変化に直面している自然生態系との関連性は不明である.
- 慢性的な受精は,種絶滅の主要な原動力である.
研究 の 目的:
- 全世界の41の草原で,多様性と安定性の関係を分析する.
- 慢性受精がこれらの関係に与える影響を調べる.
- グローバルな変化の原動力がどのように相互作用し,生態系サービスに影響を与えるかを理解する.
主な方法:
- 5つの大陸の41の天然草原における多様性-安定性関係の分析.
- 種絶滅の原動力である慢性的な受精による影響の評価.
- 種のアシンクロニーと生産性の変動の調査.
主要な成果:
- より多様な未処理の草原は,より大きな種のアシンクロニーと,より安定したバイオマス生産を示した.
- 授精は,多様性の安定に対する肯定的な効果を弱めた.
- この弱化は,生産性の変動の増加と,多様な受精したコミュニティにおける非同期性の減少によるもので,種の消失によるものではない.
結論:
- 生物多様性の安定性に関する生物多様性実験の発見は,現実世界の草原に一般化します.
- 肥料化は多様性と相互作用し,草原の安定性を低下させる.
- グローバルな変化の原動力の相互作用効果を理解することは,生態系サービス提供において極めて重要です.
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