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Updated: May 7, 2026

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A Method for Quantifying Foliage-Dwelling Arthropods
Published on: October 20, 2019
森林の断片化から25年後,地元の小さな哺乳類のファウナがほぼ完全に絶滅しました
Luke Gibson1, Antony J Lynam, Corey J A Bradshaw
1Department of Biological Sciences, National University of Singapore, 14 Science Drive 4, Singapore 117543, Singapore. lggibson@nus.edu.sg
まとめ
タイの森林の断片から5年 (<10ヘクタール) と25年 (10-56ヘクタール) の間に,小さな本土の哺乳類が姿を消した. 侵略的なネズミは,おそらくこれらの絶滅を加速し,断片化された森林の脆弱性を強調しました.
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
- 島のバイオジオグラフィー
背景:
- 熱帯雨林は,世界中で広範な森林破壊と断片化を経験しています.
- 生息地の断片から種の消失の速度を理解することは,効果的な保全と回復の取り組みにとって極めて重要です.
研究 の 目的:
- 異なる大きさの森林断片における小型の哺乳類の絶滅率を評価する.
- 孤立した森林断片における種の絶滅半減期を推定する.
- これらの断片化された景観における絶滅の潜在的要因を特定する.
主な方法:
- 小型の哺乳類の調査は,タイのチーヴ・ラーン貯水池の異なる大きさの森林断片 (<10ヘクタールと10-56ヘクタール) で実施されました.
- 調査は,断片化後の5~7年,25~26年後に繰り返された.
- 絶滅率を推定するために,島生物地理モデルが開発されました.
主要な成果:
- 現地の小型の哺乳類のほぼ全滅は5年以内に10ヘクタール未満の断片で発生しました.
- 現地の小型の哺乳類のほぼ全滅は,25年以内に10-56ヘクタールの断片で発生しました.
- 寄生種の推定平均絶滅半減期は13.9年であり,侵入性ラットは絶滅に潜在的に貢献している.
結論:
- 小規模な森林断片 (10ヘクタール未満) は,生物多様性の急速な損失に対して非常に脆弱である.
- 断片化は小型の哺乳類の個体群に重大な脅威をもたらし,絶滅率は以前に推定されたものより潜在的に高い.
- 侵入性ネズミなどのバイオティクスの侵入は,人間によって改変された景観における生物多様性の損失を悪化させ,生息地の回復と接続性の緊急の必要性を強調しています.
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