Ecospace Utilization During the Ediacaran Radiation and the Cambrian Eco-explosion
Ecospace Utilization During the Ediacaran Radiation and the Cambrian Eco-explosion
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DOI：
10.1007/978-94-007-0680-4_5
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发表时间：
2011-01-01
期刊：
影响因子：
--
通讯作者：
Erwin, Douglas H.
中科院分区：
文献类型：
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作者：
Bush, Andrew M.;Bambach, Richard K.;Erwin, Douglas H.
理论生态空间是一个多参数系统，用于对生物的生态特性进行分类；因为它们是从生态和功能能力的角度来看的，所以可以对形态和系统发育上不同的生物进行比较和对比。在这里使用的生态空间中，海洋动物根据三个参数进行分类，这三个参数可以从化石中相对容易地确定：分层(相对于沉积物-水界面的位置)、活动水平和摄食机制。对埃迪卡拉纪、寒武纪和最近的动物群的分析表明，海洋动物群的生态丰富度(生态生活方式的数量)随着时间的推移而上升，尽管在早期显生宙之后增长的速度放缓。然而，埃迪卡拉纪生物群在层级、活动水平和取食机制方面与显生目动物群截然不同；因此，在寒武纪爆发期间，双边生物的崛起引起了海洋生态的根本变化。自寒武纪爆发以来，海洋动物生态的变化幅度较小。
A theoretical ecospace is a multi-parameter system for classifying the ecological properties of organisms; because they are viewed in terms of their ecological and functional capabilities, morphologically and phylogenetically disparate organisms can be compared and contrasted. In the ecospace used here, marine animals are classified according to three parameters that can be determined relatively easily from fossils: tiering (position relative to the sediment-water interface), motility level, and feeding mechanism. Analyses of faunas from the Ediacaran, Cambrian, and Recent suggest that the ecological richness (number of ecological lifestyles) of the marine fauna rose through time, although the pace of increase slowed after the early Phanerozoic. However, the Ediacaran biota was quite distinct from Phanerozoic faunas in terms of which tiers, motility levels, and feeding mechanisms were employed; thus, the rise to dominance of bilaterians during the Cambrian Explosion caused a fundamental transformation in marine ecology. Changes in marine animal ecology since the Cambrian Explosion were of lesser magnitude.