Fosil hidup di Indo-Pasifik: tempat berlindung bagi thermophilic dinoflagellates selama glaciations

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Fosil hidup di  Indo-Pasifik: tempat berlindung bagi thermophilic dinoflagellates selama glaciations

Living fossils in the Indo-Pacific Warm Pool: A refuge for thermophilic dinoflagellates during glaciations

Date:

May 7, 2014

Source:

Ghent University

Summary:

Scientists have reported the unique discovery of the marine dinoflagellate Dapsilidinium pastielsii from Southeast Asia, notably the Indo-Pacific Warm Pool (IPWP). This unicellular species, with planktonic and benthic stages, was previously thought to have become extinct within the early Pleistocene. It evolved more than 50 million years ago and is the last survivor of a major early Cenozoic lineage.

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Ghent University scientists report the unique discovery of the marine dinoflagellate Dapsilidinium pastielsii from Southeast Asia, notably the Indo-Pacific Warm Pool (IPWP).

This unicellular species, with planktonic and benthic stages, was previously thought to have become extinct within the early Pleistocene. It evolved more than 50 million years ago and is the last survivor of a major early Cenozoic lineage. The discovery of living D. pastielsii in the IPWP suggests that this stable environment served as an important refuge for thermophilic dinoflagellates, and its disappearance from the Atlantic following the early Pleistocene implicates cooling.

This study highlights the importance of refugia in plankton biogeography and broadens their relevance as hotspots of biodiversity. It explains how biostratigraphic ranges in the Pacific can significantly extend those established for the Atlantic. The discovery of D. pastielsii as a "living fossil" in the IPWP highlights the potential for refugia to harbor species likely to expand their distributional range in a warming world.

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Story Source:

The above story is based on materials provided by Ghent University. Note: Materials may be edited for content and length.

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Journal Reference:

1. K. N. Mertens, Y. Takano, M. J. Head, K. Matsuoka. Living fossils in the Indo-Pacific warm pool: A refuge for thermophilic dinoflagellates during glaciations. Geology, 2014; DOI: 10.1130/G35456.1

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Ghent University. "Living fossils in the Indo-Pacific Warm Pool: A refuge for thermophilic dinoflagellates during glaciations." ScienceDaily. ScienceDaily, 7 May 2014. <www.sciencedaily.com/releases/2014/05/140507132351.htm>.

http://www.sciencedaily.com/releases/2014/05/140507132351.htm

 

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