segunda-feira, 23 de fevereiro de 2015

Diversidade de equinóides do Mesozóico da Bacia Lusitânica na Paleo3

Está in press desde da semana passada um novo trabalho sobre a diversidade de equinóides do Mesozóico da Bacia Lusitânica na revista Palaeogeography, Palaeoclimatology, Palaeoecology. Este trabalho foi liderado pelo geólogo Bruno Pereira da Universidade de Bristol. Bruno Pereira é um dos geológicos responsáveis pelo estudo da famosa Praia Jurássica em Porto-de-Mós.

Abstract: Several analyses of diversity through geological time use global, synoptic databases, and this practice often makes it difficult to distinguish true signals in changing diversity from regional-scale sampling and/or geological artefacts. Here we investigate how echinoid diversity changed through the Mesozoic of the Lusitanian basin in Portugal based on a comprehensive, revised database, and seek to distinguish biological signal from geological or environmental constraints. The observed diversity pattern is far from having a defined trend, showing many fluctuations that appear to be linked with gaps in the geological record. This study revealed that, independently of the method used, whether correlation tests or model fitting, the diversity signal is not completely explained by the studied sampling proxies. Among the different proxies, marine facies variation in combination with outcrop area best explains the palaeodiversity curve.


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