生態学的予測因子による植物の逐次捕食への応答:メタアナリシス
Zoë Delamore1, Julia Koricheva2, Erik H Poelman1
1Laboratory of Entomology, Wageningen University and Research, Wageningen, the Netherlands.
The New phytologist
|December 18, 2025
まとめ
植物は、捕食者の種類や植物の生活史に関係なく、誘導応答を用いて逐次的な捕食者の攻撃に対して防御する。多重捕食者相互作用の適応コストを理解するためには、さらなる研究が必要である。
科学分野:
- 生態学
- 植物科学
- 進化学
背景:
- 植物は4億年以上もの間、捕食者と共進化し、攻撃への応答において可塑性を発達させてきた。
- どの捕食者の形質が植物の応答に影響を与えるか、そして植物の生活史の形質が応答のばらつきにどのように寄与するかを理解することは極めて重要である。
研究 の 目的:
- 生態学的要因、特に捕食者の同一性と植物の生活史が、植物の逐次捕食への応答に果たす役割を調査すること。
- 誘導抵抗の有効性と、多重捕食者の攻撃下での植物のパフォーマンスへの影響を分析すること。
主な方法:
- 節足動物、線虫、哺乳類による逐次捕食を調査した161の研究のメタアナリシスを実施した。
- 捕食者のパフォーマンスと選好(誘導抵抗)、および植物の成長と損傷(植物パフォーマンス)の測定値を含めた。
主要な成果:
- 逐次捕食は一般的に捕食者のパフォーマンスを低下させたが、捕食者の選好を一貫して変化させることはなかった。
- 誘導抵抗は、温室実験および栽培植物種でより顕著であった。
- 植物は物理的な損傷を効果的に軽減したが、バイオマス損失を防ぐ効果は低かった。
結論:
- 植物は、捕食者の同一性や植物の生活史に関係なく、逐次捕食者の攻撃に対して防御するために誘導応答を利用する。
- 適応コストを理解するためには、多重捕食者相互作用が植物の適応度に及ぼす影響について、さらなる調査が必要である。
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