globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.07.033
论文题名:
Peeling out predation intensity in the fossil record: A test of repair scar frequency as a suitable proxy for predation pressure along a modern predation gradient
作者: Molinaro D.J.; Stafford E.S.; Collins B.M.J.; Barclay K.M.; Tyler C.L.; Leighton L.R.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 412
起始页码: 141
结束页码: 147
语种: 英语
英文关键词: Cancer ; Chlorostoma ; Crushing ; Durophagy ; Predation ; Repair frequency
英文摘要: Predation represents a major cause of death within marine ecosystems, acting as a major agent of natural selection and evolution. Crushing predation in particular is important, as increasing intensity of durophagy through the Phanerozoic has been argued to influence evolution. Repair frequency (RF) is a common palaeoecological metric used to infer crushing predation pressure within the fossil record, yet whether repair frequency variation accurately represents attack frequency or predator success remains uncertain. To determine if repair frequency variation tracks attack frequency or predator success, repair scar frequency for eight, modern intertidal populations of the gastropod Chlorostoma funebrale was calculated along an environmental energy gradient in Barkley Sound, Canada. Attack frequency within intertidal settings is thought to decrease with environmental energy, as crab size, abundance, and intertidal foraging time are greater in sheltered settings than in exposed settings. Spearman's rank correlation of C. funebrale repair frequencies along the energy gradient produced a strong inverse correlation (p. ≪. 0.0001) regardless of metric used. These results suggest that repair frequency within crab-gastropod systems serves as a proxy for predator attack frequency. Therefore, the inferences of predation pressure between morphologically similar fossil gastropod populations drawn from repair frequency data are likely accurate. © 2014.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69308
Appears in Collections:过去全球变化的重建

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作者单位: Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB, Canada; Florida Museum of Natural History, University of Florida, Department of Natural History, Museum Road, PO Box 117800, Gainesville, FL, United States

Recommended Citation:
Molinaro D.J.,Stafford E.S.,Collins B.M.J.,et al. Peeling out predation intensity in the fossil record: A test of repair scar frequency as a suitable proxy for predation pressure along a modern predation gradient[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,412
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