Abundance not linked to survival across the end-Cretaceous mass extinction: Patterns in North American bivalves
Abundance not linked to survival across the end-Cretaceous mass extinction: Patterns in North American bivalves
复制标题
丰富度与白垩纪末期大规模灭绝期间的生存无关：北美双壳类的模式
DOI：
10.1073/pnas.0535132100
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发表时间：
2003
影响因子：
11.1
通讯作者：
R. Lockwood
中科院分区：
文献类型：
--
作者：
R. Lockwood
生态学研究表明，稀有分类群比丰富分类群更有可能灭绝，但在化石记录中，丰富度对生存的影响很少受到关注。一项对来自北美海岸平原的马斯特里克晚期双壳类亚属的分析发现，无论丰度度量或空间尺度如何，没有证据表明生存与白垩纪末期大灭绝（6500万年前）的丰度有关。白垩纪末期双壳类动物的丰度并不能促进其存活，这一事实表明，化石记录中影响大灭绝期间存活的因素可能与背景灭绝期间的因素不同。
Ecological studies suggest that rare taxa are more likely to go extinct than abundant ones, but the influence of abundance on survivorship in the fossil record has received little attention. An analysis of Late Maastrichtian bivalve subgenera from the North American Coastal Plain found no evidence that survivorship is tied to abundance across the end-Cretaceous mass extinction (65 million years ago), regardless of abundance metric or spatial scale examined. The fact that abundance does not promote survivorship in end-Cretaceous bivalves suggests that the factors influencing survivorship during mass extinctions in the fossil record may differ from those operating during intervals of background extinction.