豊富な分布は,パレオゾイク後の海洋生態系の高度な複雑さを意味しています
Peter J Wagner1, Matthew A Kosnik, Scott Lidgard
1Department of Geology, Field Museum of Natural History, 1400 South Lake Shore Drive, Chicago, IL 60605, USA. pwagner@fmnh.org
まとめ
海洋生態系は,パレオゾーイク時代以降,より複雑になりました. ペルミア紀末期の絶滅イベントは,海洋生物を永久に変えており,メソケノゾイク期の生物多様性と複雑性の増大につながった.
科学分野:
- パレオントロジー・パレオントロジー
- 海洋生態学 海洋生態学とは
- 進化生物学の進化生物学について
背景:
- ファネロゾーイク期の海洋化石の集合体は,相対的多量分布のシフトを示している.
- 生態学理論は,豊かさの分布と生態系の複雑さを結びつける.
研究 の 目的:
- ファネロゾイク全体における海洋生態系の構造と複雑性の変化を分析する.
- ペルミア期末の絶滅が海洋生物多様性に与える影響を調査する.
主な方法:
- 1176の化石アセンブラージの確率分析.
- パレオゾーイクとメソケノゾーイク時代の海洋コミュニティの比較.
- 動物の組成の変化の評価 (座っている動物と移動する動物,動物内動物と動物外動物).
主要な成果:
- 比較的豊富な分布の有意なシフトは,パレオゾイク以降に発生した.
- メソケノゾイク期の集合体は,パレオゾイク期の集合体よりも高い生態学的複雑性を表しています.
- この移行は,静止型サスペンション給餌器から,多様な移動性および非動物性分類体への移行によって引き起こされた.
結論:
- ペルミア紀末期の絶滅は,海洋生態系の構造を永久に変化させた.
- この絶滅の出来事は,メソケノゾイクにおけるより高い生態学的複雑性とアルファ多様性をもたらした.
- 化石の保存や収集方法の変化は,観測された生態学的シフトを説明しません.
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