アンデス山脈の森林が気候変動に与える影響は広範囲に及ぶが,異質である
Belén Fadrique1, Selene Báez2,3, Álvaro Duque4
1Department of Biology, University of Miami, Coral Gables, FL, USA.
Nature
|November 16, 2018
まとめ
地球温暖化により 熱帯の樹種は 低地やより暖かい地域へと 移り住んでいます この広範囲にわたる"熱性化"の速度は アンデス山脈全体で変化し 森林の構成に影響を及ぼします
科学分野:
- エコロジー
- 気候変動の生物学
- 植物学
背景:
- 地球温暖化によって 種の生息地が変化し コミュニティの構成が変化します
- 気候変化に対する熱帯の木々の反応は 十分に研究されていません
- これらの変化を理解することは 保護に不可欠です
研究 の 目的:
- 気候変化による 熱帯の木の分布の変化の予測を テストする
- アンデス山脈の樹木コミュニティにおける"熱化"現象を調査する.
- 組成の変化率に影響を与える要因を分析する.
主な方法:
- アンデス山脈の森林の 200 件の土地のデータベースを利用した.
- 広い緯度帯 (26. 8°南から7. 1°北) でデータを分析した.
- 海抜360mから3360mまでの標高の変化を調べた.
主要な成果:
- 熱帯と亜熱帯の樹群は,より低い,より暖かい高さからの種への方向転換を示しています.
- アンデス山脈では熱愛化が広く行われています
- 構成の変化の速度は均一ではなく,高さによって異なります.
結論:
- アンデス熱帯雨林は 気候によって大きく変化しています
- 熱化率の異質性は,温暖化率とエコトーンに関連している可能性があります.
- 熱帯雨林への気候変動の影響を予測し,軽減するためにさらなる研究が必要です.
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