資源の質が食糧ネットワークの構造に及ぼす直接的・間接的な影響
Tibor Bukovinszky1, F J Frank van Veen, Yde Jongema
1Laboratory of Entomology, Wageningen University, Post Office Box 8031, 6700 EH Wageningen, Netherlands. tibor.bukovinszky@wur.nl
Science (New York, N.Y.)
|February 9, 2008
まとめ
植物の質は,複数のトロフィックレベルで種の相互作用を変更することによって,食物網の構造と安定性に大きく影響します. これらの変化は,特質と密度の両方の影響によって引き起こされ,生態系ダイナミクスにおける資源品質の重要性を強調しています.
科学分野:
- エコロジー エコロジー エコロジー
- フードウェブのダイナミクス
- エコシステムの安定性
背景:
- 食物網の複雑性と多様性は,生態系の機能と安定性にとって極めて重要です.
- これらの食物網特性の基礎となる生物学的メカニズムは十分に理解されていません.
- 資源の質は,種の相互作用,エネルギー転送,消費者の特徴に影響を与えます.
研究 の 目的:
- 植物特性の違いが食物網の構造にどのように影響するかを調査する.
- 植物品質が生態系ネットワークに及ぼす直接的・間接的な影響を明らかにする.
- 3つのトロフィックレベルにおける植物品質の影響を分析する.
主な方法:
- 定量的草食動物-寄生虫-二次寄生虫の食物網の構築.
- 特性媒介と密度媒介の相互作用の分析.
- 植物品質が消費者の動態に与える影響の評価.
主要な成果:
- 植物の特徴は,食物網全体の構造に影響することが判明しました.
- 植物品質の直接的・間接的な影響は,複数のトロフィックレベルで観察されました.
- 消費者の相互作用は,草食動物-寄生虫-二次寄生虫経路を通じて定量的に評価されました.
結論:
- 植物品質は,食物網の構造と安定性の重要な要因である.
- 食物網の変化は,特質と密度の両方の相互作用によって影響を受けます.
- 資源の質を理解することは,生態系の機能と安定性を予測する鍵です.
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