統合モデリングは,生産性と植物種の豊かさを結びつけるメカニズムを明らかにします
James B Grace1, T Michael Anderson2, Eric W Seabloom3
1US Geological Survey, Wetland and Aquatic Research Center, 700 Cajundome Boulevard, Lafayette, Louisiana 70506, USA.
Nature
|January 14, 2016
まとめ
生態系の生産性と 種の豊かさは 一つのメカニズムではなく 複数のメカニズムで結びついています 富が生産性を高め 競争が常に重要であることを示し 古い生態学理論に 異議を唱えました
科学分野:
- エコロジー
- グローバル 変化 生物学
- 生物多様性科学
背景:
- 生態系の生産性と種の豊かさとの関係は,生態学における長年の議論です.
- 過去の研究では グローバルなパターンを 駆動する正確なメカニズムを 特定するのに苦労しました
- 現存する理論は 生産性と富の相互作用について 矛盾する説明を提示しています
研究 の 目的:
- 複数の生態学理論を統合し 単一の包括的なモデルにします
- 世界的なデータを用いて,生態系の生産性と種の豊かさを結びつける主要なメカニズムを特定する.
- 統合モデルの説明力を,従来の二元分析と比較してテストする.
主な方法:
- 5つの大陸の1,126の草原からデータを集めました
- 様々な生態学理論からの予測を組み合わせた統合モデルの開発.
- 基本的なメカニズムのシグナルを検出し,モデルのパフォーマンスを比較するための統計分析.
主要な成果:
- 統合モデルは生産性と富の関係を説明する際に従来の二元分析を大幅に上回りました.
- 生態系の生産性を向上させるのです 表面的な観察とは正反対です
- 競争は全ての生産レベルにおいて重要な役割を果たし,マクロエコロジカル・グラデーションも地域の豊かさに影響を与えます.
結論:
- 複雑な生態系を理解するためには 統合的なモデリングアプローチが不可欠です
- この研究は古典的な生態学モデルに 異議を唱える 驚くべき一貫したメカニズムを明らかにしています
- この研究は生態系の生産性と生物多様性を 支配するプロセスを 識別する能力を高めています
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