Seaweeds in cold seas: evolution and carbon acquisition |
| |
| Authors: | Raven John A Johnston Andrew M Kübler Janet E Korb Rebecca McInroy Shona G Handley Linda L Scrimgeour Charlie M Walker Diana I Beardall John Clayton Margaret N Vanderklift Mathew Fredriksen Stein Dunton Kenneth H |
| |
| Institution: | Division of Environmental and Applied Biology, School of Life Sciences, University of Dundee, Biological Sciences Institute, Dundee DD1 4HN, UK. j.a.raven@dundee.ac.uk |
| |
| Abstract: | Much evidence suggests that life originated in hydrothermal habitats, and for much of the time since the origin of cyanobacteria (at least 2.5 Ga ago) and of eukaryotic algae (at least 2.1 Ga ago) the average sea surface and land surface temperatures were higher than they are today. However, there have been at least four significant glacial episodes prior to the Pleistocene glaciations. Two of these (approx. 2.1 and 0.7 Ga ago) may have involved a 'Snowball Earth' with a very great impact on the algae (sensu lato) of the time (cyanobacteria, Chlorophyta and Rhodophyta) and especially those that were adapted to warm habitats. By contrast, it is possible that heterokont, dinophyte and haptophyte phototrophs only evolved after the Carboniferous-Permian ice age (approx. 250 Ma ago) and so did not encounter low (
|
| |
| Keywords: | Review carbon dioxide Chlorophyta glaciations Heterokontophyta Phaeophyceae Rhodophyta |
| 本文献已被 PubMed Oxford 等数据库收录！ |
