コメントへの返信 "植物の多様性は,地球規模での負の密度依存の強さとともに増加する"

Joseph A LaManna^1,2, Scott A Mangan², Alfonso Alonso³

¹Tyson Research Center, Washington University, St. Louis, MO, USA. joe.a.lamanna@gmail.com.

Science (New York, N.Y.)

|May 26, 2018

まとめ

この研究は,同種の負密度依存 (CNDD) を推定するバイアスの主張を否定し,CNDDの緯度グラデーションとその種数との関係を確認しています.

科学分野:

エコロジー
人口生物学
生物多様性科学

背景:

同種の負密度依存 (CNDD) を推定することは,人口動態を理解するために極めて重要です.
以前の研究では,CNDDの緯度パターンが示唆されていましたが,最近,これは疑問視されました.
CNDDの正確な推定については,方法論的な議論がある.

研究の目的:

CNDDの推定に関する方法論的批判に対処する.
CNDDにおける緯度グラデントの存在を再評価する.
CNDDと生物の多様性の関係を研究する.

主な方法:

CNDDを推定するための生態学的データの統計分析.
元のCNDDの推定方法と提案された代替方法の比較
方法論的な懸念を評価するために距離加重アプローチを適用する.

主要な成果:

ChisholmとFungが提案した代替方法は,CNDDの偏った見積もりをもたらします.
代替方法のバイアスは,検出された緯度パターンがないことを説明します.
距離加重アプローチは,CNDDの緯度グラデントの元の発見を支持する.

結論:

CNDDを推定する元の方法は堅実で,重要な生態学的パターンを明らかにしています.
CNDDの緯度グラデーションとその種数との関係が支持されている.
方法論的改善は,生態学の研究における空間的なスケールの重要性を確認しています.

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