草食は,侵襲的な草に対する地下食物網の反応を媒介する
Marco Fioratti Junod1, Irene Cordero1, Nadia Chinn2
1Community Ecology, Plant-Animal Interactions, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland.
The Journal of animal ecology
|August 30, 2025
まとめ
侵襲的な草は草原の土壌の食物網を乱しますが,特に哺乳類はこれらの悪影響を軽減することができます. 草原の生態系を健全に保つには 統合管理が不可欠です
科学分野:
- エコロジー
- 土壌科学
- 侵入種 生物学
背景:
- 草原の生態系は 地上の草食動物や 侵入植物から 二重の脅威に直面しています
- 地下食物網と土壌生物に及ぼす影響は 十分に理解されていない.
研究 の 目的:
- 侵襲的なアフリカン・ラブグラス (ALG) が,草原の地下食物網に及ぼす影響を研究する.
- 侵入植物と草食動物が土壌生物や植物群に及ぼす相互作用の理解
主な方法:
- 4つの草食性治療法 (異なる動物の存在) を確立するために,実験的な排除が使用されました.
- オーストラリアのネイティブカンガルーの草 (KG) が支配し,侵入した (KG + ALG) サイトで研究が行われました.
- 土壌の生物 (バクテリア,真菌,ネマトード,節足類,ワーム) と分解過程を4年間にわたって分析した.
主要な成果:
- 侵襲的な草は土壌の食物網の構造と豊富さを大きく変えており 草食動物を除外すると 影響は強まりました
- 草食動物を除外すると 細菌から真菌の優位性への分解が変化し 土壌の条件が変化した.
- 哺乳類の草食 (本土と非本土) は 侵襲的な草の悪影響を軽減し,添加物として作用した.
結論:
- 草原の土壌の生態系を決定的に形作っています 草原の土壌の生態系は
- 侵食種と草食動物の両方を考慮した統合管理戦略は,草原の保全に不可欠です.
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