サンゴ礁の多様性は,生物多様性の中立理論を否定する
Maria Dornelas1, Sean R Connolly, Terence P Hughes
1ARC Centre of Excellence for Coral Reef Studies, James Cook University, Townsville, Queensland 4811, Australia. maria.dornelas@jcu.edu.au
Nature
|March 3, 2006
まとめ
珊瑚礁の生物多様性は中立理論では説明できない. 代わりに,空間と時間における環境の変化が,これらの重要な海洋生態系における多様性の主要な原動力であるようです.
科学分野:
- マリン・バイオロジー マリン・バイオロジー
- エコロジー エコロジー エコロジー
- 生物多様性 科学 科学 生物多様性
背景:
- 珊瑚礁は,世界的な減少に直面しており,コミュニティの構造と生物多様性の理解が必要である.
- 中立理論は,生物多様性のパターンを説明するために,種間の人口学的同等性を仮定します.
研究 の 目的:
- 広範囲にわたるインド太平洋の珊瑚コミュニティのデータを用いて中立理論の予測をテストする.
- 中立モデルのフィットと,サンゴのコミュニティ構造の代替説明を比較する.
主な方法:
- インド太平洋のサンゴのコミュニティの大規模な種別データセットの分析.
- 経験的なコミュニティの類似性と種の相対的な豊富さのデータを中立モデルの予測と比較.
主要な成果:
- 珊瑚の集合は,コミュニティの類似性と種の相対的な豊富さに関する中立理論の予測から著しく逸脱する.
- ニュートラルモデルは,ログ・ノーマル分布と比較して,地元の種の相対的多量分布に不適切に対応する.
- 経験的コミュニティの類似性は,中立理論の予測よりも変化し,低かった.
結論:
- 中立理論は,インド太平洋のサンゴ礁の生物多様性パターンを十分に説明できません.
- 空間時的環境ストキャスティシティは,サンゴ礁の多様性のより高い可能性のあるドライバーです.
- この発見は,中立理論に対する以前の批判に異議を唱え,環境要因の重要性を強調している.
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