Phanerozoic trends in the global diversity of marine invertebrates
Phanerozoic trends in the global diversity of marine invertebrates
复制标题
DOI：
10.1126/science.1156963
复制
发表时间：
2008-07-04
期刊：
影响因子：
56.9
通讯作者：
Visaggi, Christy C.
中科院分区：
文献类型：
--
作者：
Alroy, John;Aberhan, Martin;Visaggi, Christy C.
此前人们认为海洋无脊椎动物在白垩纪和新生代有一次急剧的辐射演化。这种模式可以用一个代表350万件标本的新化石出现数据集来重现，但只有使用较旧的分析方案时才行。此外，采用抽样标准化和更可靠计数方法的分析表明，多样性适度增加，在白垩纪中期之后没有明显趋势。在全球、局部以及高纬度和低纬度地区，新近纪的多样性不到古生代中期的两倍。全球丰富度与局部丰富度的比率变化不大，而且在早古生代就存在纬度多样性梯度。
It has previously been thought that there was a steep Cretaceous and Cenozoic radiation of marine invertebrates. This pattern can be replicated with a new data set of fossil occurrences representing 3.5 million specimens, but only when older analytical protocols are used. Moreover, analyses that employ sampling standardization and more robust counting methods show a modest rise in diversity with no clear trend after the mid- Cretaceous. Globally, locally, and at both high and low latitudes, diversity was less than twice as high in the Neogene as in the mid- Paleozoic. The ratio of global to local richness has changed little, and a latitudinal diversity gradient was present in the early Paleozoic.