DOI: 10.1016/j.palaeo.2012.11.025
论文题名: Phenotypic evolution in a fossil gastropod species lineage: Evidence for adaptive radiation?
作者: Neubauer T.A. ; Harzhauser M. ; Kroh A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 370 起始页码: 117
结束页码: 126
语种: 英语
英文关键词: Adaptive landscape
; Adaptive radiation
; Fast Fourier analysis
; Lake Pannon
; Stasis
英文摘要: Detecting speciation in the fossil record is a particularly challenging matter. Palaeontologists are usually confronted with poor preservation and limited knowledge on the palaeoenvironment. Even in the contrary case of adequate preservation and information, the linkage of pattern to process is often obscured by insufficient temporal resolution. Consequently, reliable documentations of speciation in fossils with discussions on underlying mechanisms are rare. Here we present a well-resolved pattern of morphological evolution in a fossil species lineage of the gastropod Melanopsis in the long-lived Lake Pannon. These developments are related to environmental changes, documented by isotope and stratigraphical data. After a long period of stasis, the ancestral species experiences a phenotypic change expressed as shift and expansion of the morphospace. The appearance of several new phenotypes along with changes in the environment is interpreted as adaptive radiation. Lake-level high stands affect distribution and availability of habitats and, as a result of varied functional demands on shell geometry, the distribution of phenotypes. The ongoing divergence of the morphospace into two branches argues for increasing reproductive isolation, consistent with the model of ecological speciation. In the latest phase, however, progressively unstable conditions restrict availability of niches, allowing survival of one branch only. © 2012 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69871
Appears in Collections: 过去全球变化的重建
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作者单位: Geological-Paleontological Department, Natural History Museum Vienna, Burgring 7, 1010 Vienna, Austria
Recommended Citation:
Neubauer T.A.,Harzhauser M.,Kroh A.. Phenotypic evolution in a fossil gastropod species lineage: Evidence for adaptive radiation?[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,370