地球灾变作为生物进化一个重要动因的实证与机制

CATASTROPHIC EVENTS AS A MAJOR DYNAMIC CAUSE FOR ORGANIC EVOLUTION: VERIFICATION AND MECHANISM

群集出现常伴随着群集消失,这可见于显生宙许多发生过灾变事件的纪一级或其他级别的地层界限附近。如同群集消失由地球灾变引起一样,文章认为地球灾变亦是群集出现的一个重要动因。在灾变期,地球表层一般可分为非灾变区、边缘灾变区和中心灾变区。非灾变区生物以背景消失和背景出现为主,中心灾变区一般以群集消失、尤其是群集灭绝为主,而边缘灾变区则既有群集消失又有群集出现、尤其是群集起源,是进化的活跃地区。

Mass appearance is usually accompanied by mass disappearance, which may be found near many interperiod boundaries or other boundaries of the Phanerozoic where catastrophic events happened. It is considered that catastrophic events on the earth are also a major cause for mass appearance, as is the case with mass disappearance which is mostly caused by catastrophic events. During the catastrophism, the surface of the earth may be divided into the non-catastrophic region, marginal catastrophic region and central catastrophic region. The non-catastrophic region is mainly characterized by background disappearance and appearance of organisms and the central catastrophic region by mass disappearance, particularly mass extinction: whereas the marginal catastrophic region is characterized by both mass disappearance and mass appearance and in particular it is an active region of organic origin and evolution.