DOI: 10.1016/j.palaeo.2014.08.022
论文题名: Coexistence of brachiopod and bivalves in the Late Paleozoic of Western Argentina
作者: Balseiro D. ; Sterren A.F. ; Cisterna G.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 414 起始页码: 133
结束页码: 145
语种: 英语
英文关键词: Argentina
; Bivalves
; Brachiopods
; Coexistence
; Competition
; Late Paleozoic
英文摘要: The relationship between brachiopods and bivalves has been widely discussed in previous studies. Based on analyses at different temporal and spatial scales, several authors have argued either for the indifference or the interaction between the two clades. In this contribution we evaluate brachiopod and bivalve coexistence at two different spatial scales in a siliciclastic shelf developed during the Late Paleozoic in Western Argentina. At regional scale, bivalves were more diverse than brachiopods, although both had a similar total number and comparable distribution of occurrences. At local scale, however, multivariate analyses indicate that brachiopods and bivalves were segregated. Null models reinforce this pattern confirming the non-random co-occurrence pattern, and that the coexistence of brachiopods and bivalves was significantly low. In addition, multivariate analyses indicate that the biotic gradient neither followed the bathymetrical, nor a geographical or temporal gradient. The possibility that such segregation would have been caused by taphonomic (storm) reworking, was also disregarded considering multivariate analyses together with taphonomic evidence. The lack of environmental segregation between brachiopods and bivalves, coupled to analyses taking into account ecological guilds, indicates that possible factors controlling the segregation, such as turbidity, substrate or productivity were not relevant. As a whole, these results suggest a possible competitive interaction between brachiopods and bivalves at local scales. Interestingly, brachiopod-bivalve coexistence at regional scale did not foster local coexistence, indicating that the processes acting at these two scales are, at least partially, decoupled. Finally, the regional coexistence pattern suggests that the major transition between brachiopod and bivalve dominated communities was most probably related to processes acting at regional to biogeographic scales rather than to competition. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69182
Appears in Collections: 过去全球变化的重建
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作者单位: CICTERRA, CONICET, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, Ciudad Universitaria, Córdoba, Argentina; CIPAL, Facultad de Ciencias Exactas Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 299, Córdoba, Argentina; CONICET, Universidad Nacional de La Rioja, Av. Luis M. de la Fuente s/n, La Rioja, Argentina
Recommended Citation:
Balseiro D.,Sterren A.F.,Cisterna G.. Coexistence of brachiopod and bivalves in the Late Paleozoic of Western Argentina[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,414