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変動する相互作用ネットワークと自然魚群の時間変動する安定性
Masayuki Ushio1,2,3,4, Chih-Hao Hsieh5,6,7, Reiji Masuda8
1Department of Environmental Solution Technology, Faculty of Science and Technology, Ryukoku University, Otsu 520-2194, Japan.
Nature
|February 8, 2018
まとめ
生態学的相互作用は動的に変化し コミュニティの安定に影響を与えます この研究は,魚のコミュニティの動態における季節的パターンを明らかにし,相互作用ネットワークの変化と安定性と集団の変動を結びつけています.
科学分野:
- エコロジー
- 海洋生物学
- ネットワーク分析
背景:
- 生態学理論では コミュニティの安定性は ダイナミックな種間相互作用によって 影響を受けると考えられています
- 自然生態系からの経験的証拠は,急速な相互作用の変化を追跡する上で困難であるため,稀です.
研究 の 目的:
- 種間相互作用のネットワークの短期的な変化が 海洋魚群のダイナミクスにどのように影響するかを調査する.
- 新しいダイナミック・スタビリティ・メーターを用いて,時間変動の相互作用ネットワークとコミュニティの安定性を結びつける.
主な方法:
- 海洋魚群の12年毎のデータセットの分析
- 15の支配的な種のダイナミックな相互作用ネットワークの構築
- 非線形時間系列分析とローカルライアプノフ安定性に基づく時間変動安定度測定の適用.
主要な成果:
- 相互作用の強さとタイプが 時間の経過とともに変化することを示した.
- 生態学理論を支持する 動的安定性の季節的パターンを特定した.
- 夏の間の相互作用の弱さと 種の多様性の高さは 安定性の高さと 集団の変動の低さと相関していることが分かりました
結論:
- 異種間の相互作用,コミュニティネットワーク構造,そして安定性はダイナミックな性質です.
- 変動する相互作用ネットワークと コミュニティのダイナミクスとの関係を理解することは 生態系維持に不可欠です
- 短期間の相互作用 ネットワークの変化は,自然生態系における全体的なコミュニティのダイナミクスに大きな影響を与えます.
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