globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2012.07.014
论文题名:
Non-biotic controls of observed diversity in the paleontologic record: An example from the Permo-Triassic Karoo Basin of South Africa
作者: Irmis R.B.; Whiteside J.H.; Kammerer C.F.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 372
起始页码: 62
结束页码: 77
语种: 英语
英文关键词: End-Permian mass extinction ; Evenness ; Paleoecology ; Rarefaction ; Relative abundance ; Richness
英文摘要: Paleodiversity trends through geologic time can be affected by a number of geologic, taphonomic, and anthropogenic biases that obscure or prejudice paleoecological patterns in the fossil record. Although much work has concentrated on the relationship between geologic exposure, sample size, and taxonomic richness (i.e., number of taxa), few studies have investigated the potential effects of dataset quality and changing taxonomy. We use four different specimen-level datasets of Permo-Triassic tetrapods from the Karoo Basin of South Africa to investigate how sample size, geologic outcrop, dataset quality, and taxonomic revision all affect observed estimates of generic richness, evenness, and relative abundance. Our results indicate that large-scale patterns of richness, evenness, and abundance, such as the effects of the end-Permian mass extinction, are generally robust to these potential biases across the four different datasets. In contrast, absolute values vary significantly as do finer-scale patterns. In agreement with past studies, taxonomic errors, revised taxonomy, and new taxa have little effect on patterns of richness and evenness; instead, the addition of large numbers of new specimens to the dataset has the largest effect on these paleodiversity metrics, despite application of sample-standardization. We conclude that although large specimen datasets (hundreds to thousands of specimens) are robust to various potential biases, and can recover large-scale paleobiologic trends, they are still affected by many non-biotic controls, and workers should strive to improve dataset quality and understand the underlying reasons for observed paleodiversity patterns. © 2012 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69830
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作者单位: Natural History Museum of Utah, University of Utah, 301 Wakara Way, Salt Lake City, UT 84108-1214, United States; Department of Geology and Geophysics, University of Utah, 115 S 1460 E, Salt Lake City, UT 84112-0102, United States; Department of Geological Sciences, Brown University, 324 Brook Street, Box 1846, Providence, RI 02912, United States; Museum für Naturkunde, Leibniz-Institut fur Evolutions- und Biodiversitatsforschung an der Humboldt-Universitat zu Berlin, Invalidenstraße 43, 10115 Berlin, Germany

Recommended Citation:
Irmis R.B.,Whiteside J.H.,Kammerer C.F.. Non-biotic controls of observed diversity in the paleontologic record: An example from the Permo-Triassic Karoo Basin of South Africa[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,372
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