生殖のペア相関と生物のクラスタリング

W R Young¹, A J Roberts, G Stuhne

¹Scripps Institution of Oceanography, University of California at San Diego, La Jolla, California 92093-0230, USA. wryoung@ucsd.edu

Nature

|July 19, 2001

まとめ

独立した生物は,独自の生殖戦略により,自発的に集合する. この"生まれつきの隣人"の規則は,パターン形成を促し,ランダムな動きを克服し,生物学的クラスターを作成します.

科学分野:

理論的なエコロジー
人口の動態
数学生物学数学生物学について

背景:

生物のクラスタリングは,社会的行動,環境のシグナル,または種の相互作用から生じます.
海洋の乱れのような環境要因は,プランクトンの空間的なパターンを生み出します.
非線形相互作用は,均一な環境でも自発的なパターン形成につながる可能性があります.

研究の目的:

独立した生物の集団における自発的集積を調査する.
クラスター形成を駆動する根本的なメカニズムを特定する.
生殖に基づいた規則が,新たなパターンに導くことができるかどうかを判断する.

主な方法:

独立した,ランダムに歩く生物をシミュレートする個人ベースのモデルを使用しました.
生物はバイナリ分裂で繁殖し,恒常的な速度で死にました.
新しいクラスタリングメカニズムを導入した: 生殖は生物の隣接で起こらなければならない.

主要な成果:

集団は,均質な初期条件から自発的に集合した.
クラスタリングは,環境の変動性や導かれた運動 (タクシー/運動) などの外部要因なしに発生した.
生殖ルールは,集積を成功裏に駆り立て,圧倒的な拡散をもたらし,ポイスン以外の相関関係を生み出した.

結論:

単純で生殖的なメカニズムは,自発的な集団のクラスタリングを引き起こす可能性があります.
独立した個体の集団では,突然の集積とパターン形成は可能である.
このモデルは,地元の生殖規則が人口分布をどのように形作るかを理解するための枠組みを提供します.

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