廊下は,大規模に植物種を豊かにする
Ellen I Damschen1, Nick M Haddad, John L Orrock
1Department of Zoology, North Carolina State University, Raleigh, NC 27695-7617, USA. damschen@nceas.ucsb.edu
Science (New York, N.Y.)
|September 2, 2006
まとめ
ハビタット回廊は,分散した風景における原生植物の種を効果的に保存し,侵入種を促進することなく,時間の経過とともに増加した利益を示しています. これは,生物多様性保全の取り組みにおけるそれらの使用を支持します.
科学分野:
- エコロジー エコロジー エコロジー
- 保護生物学の保護生物学
- 景観の生態学 景観の生態学
背景:
- 生息地の断片化は,世界的に生物多様性の損失の主な要因である.
- 景観廊下は,断片化の影響を軽減するために広く実施されている保全ツールです.
- 生物多様性の保全における大規模な回廊の有効性に関する証拠は,依然として限られている.
研究 の 目的:
- 地元植物種の豊かさを維持する上での景観回廊の有効性を実験的に評価する.
- 経路の利益が時間とともに変化するかどうかを判断する.
- エキゾチックな植物種の侵入に対する廊下の影響を評価する.
主な方法:
- 大規模で複製されたフィールド実験が行われました.
- 廊下で接続された生息地パッチは,孤立したパッチと比較されました.
- ネイティブとエキゾチックな植物種の組成の変化は,時間とともにモニタリングされました.
主要な成果:
- 接続された生息地パッチは,孤立したパッチよりもはるかに多くのネイティブの植物種を保持しました.
- 接続されたパッチと孤立したパッチの間のネイティブ種の豊かさの違いは,時間の経過とともに増加しました.
- 廊下は,エキゾチックな植物種の豊富さや多様性を増加させなかった.
結論:
- ランドスケープ回廊は,断片化された風景における原生生物多様性の保全のための効果的なツールです.
- 生物多様性に対する回廊のポジティブな影響は,時間とともに蓄積される.
- 廊下は,異国生物の侵入のリスクを増やすことなく,保護計画におけるその使用を支えるように実装することができます.
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