التفاصيل البيبلوغرافية
| العنوان: |
Olson's Extinction and the latitudinal biodiversity gradient of tetrapods in the Permian. |
| المؤلفون: |
Brocklehurst, Neil1 neil.brocklehurst@mfn-berlin.de, Day, Michael O.2, Rubidge, Bruce S.2, öbisch, J. örg Fr1,2,3 |
| المصدر: |
Proceedings of the Royal Society B: Biological Sciences. 4/12/2017, Vol. 284 Issue 1852, p1-8. 8p. |
| مصطلحات موضوعية: |
*TETRAPODS, *PERMIANS, *BIOSTRATIGRAPHY, *BIODIVERSITY, *AMPHIBIANS |
| مستخلص: |
The terrestrial vertebrate fauna underwent a substantial change in compo- sition between the lower and middle Permian. The lower Permian fauna was characterized by diverse and abundant amphibians and pelycosaurian- grade synapsids. During the middle Permian, a therapsid-dominated fauna, containing a diverse array of parareptiles and a considerably reduced richness of amphibians, replaced this.However, it is debatedwhether the transition is a genuine event, accompanied by a mass extinction, or whether it is merely an artefact of the shift in sampling from the palaeoequatorial latitudes to the palaeotemperate latitudes. Here we use an up-to-date biostratigraphy and incorporate recent discoveries to thoroughly review the Permian tetrapod fossil record. We suggest that the faunal transition represents a genuine event; the lower Permian temperate faunas are more similar to lower Permian equatorial faunas than middle Permian temperate faunas. The transition was not consistent across latitudes; the turnover occurred more rapidly in Russia, but was delayed in North America. The argument that the mass extinction is an artefact of a latitudinal biodiversity gradient and a shift in sampling localities is rejected: sampling correction demonstrates an inverse latitudinal biodiversity gradient was prevalent during the Permian, with peak diversity in the temperate latitudes. [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
Academic Search Index |
Full Text Finder