農業が支配する風景はミツバチの遺伝子多様性と受粉機能を低下させる
Heather Grab1, Michael G Branstetter2, Nolan Amon3,4
1Department of Entomology, Cornell University, Ithaca, NY 14853, USA. heathergrab@cornell.edu.
まとめ
土地利用の変化は 授粉者の進化史を劇的に減らし 収穫量と作物の品質に影響を与えます 生態系サービスの保護には 種の数だけでなく 系統的多様性も考慮する必要があります
科学分野:
- エコロジー
- 保護生物学
- 進化生物学
背景:
- 土地利用の変化は 生物多様性の損失の主要な原動力です
- 生態系サービスに対する遺伝子多様性の影響は十分に理解されていません.
- 農作物の生産と生態系の機能には 授粉者コミュニティが不可欠です
研究 の 目的:
- 土地利用,受粉者の遺伝子構造,作物の生産との関係を調査する.
- 生態系サービス提供に影響を及ぼすかどうかを判断する.
- 進化史の重要性を 保存戦略に強調する
主な方法:
- 広範囲にわたるゲノム,コミュニティ,作物のデータセットを利用した.
- 異なる農業地域における 授粉者集団の遺伝構造を分析した.
- 農作物の収穫量と品質の指標と相関する受粉者の遺伝子多様性
主要な成果:
- 農業が盛んだった地域では 授粉者の進化の歴史が著しく減少した (2億3000万年).
- 遺伝子多様性の減少は 収穫量と作物の品質の低下と密接に関連していた.
- 植物の生息地が変化すると 生態系の基本的サービスに 干渉します
結論:
- 種数にのみ焦点を当てた保全活動は,生態系機能を適切に保護できない可能性があります.
- 生態系サービスの提供を保証するには,遺伝子多様性の維持が不可欠です.
- 進化の歴史を理解することは 効果的な生物多様性保全と生態系の回復力にとって不可欠です
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