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Latest Heterokonts Stories

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2011-03-01 10:04:36

Diatoms account for a large proportion of the phytoplankton found in the water, and live both in the open sea and in freshwater lakes. By reviving 100-year-old spores that had laid buried and inactive in bottom sediment, researchers at the University of Gothenburg, Sweden, have shown that diatoms are also genetically stable and survival artists. Recent research has shown that diatoms exhibit great genetic differences and that they occur in discrete populations, which means that they multiply...

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2011-01-21 11:46:44

A team of biologists has discovered an entirely new group of algae living in a wide variety of marine and freshwater environments. This group of algae, which the researchers dubbed "rappemonads," have DNA that is distinctly different from that of other known algae. In fact, humans and mushrooms are more closely related to each other than rappemonads are to some other common algae (such as green algae). Based on their DNA analysis, the researchers believe that they have discovered not just a...

c8bfa330493d704f847278b4c447b8a71
2010-06-04 09:40:51

Scientists have for the first time determined the complete genome sequence of a brown alga and opened a new door to the understanding of multicellularity and photosynthesis. With the world's first complete sequencing of a brown algal genome, an international research team has made a big leap towards understanding the evolution of two key prerequisites for higher life on Earth - multicellularity and photosynthesis. As the internationally renowned science magazine "Nature" reported in its...

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2010-02-20 08:45:00

A new paper by researchers at George Mason University and the University of Otago in New Zealand shows a strong link between the diversity of organisms at the bottom of the food chain and the diversity of mammals at the top. Mark D. Uhen, a geologist at Mason, says that throughout the last 30 million years, changes in the diversity of whale species living at any given time period correlates with the evolution and diversification of diatoms, tiny, abundant algae that live in the ocean. In the...

2009-07-09 09:21:18

New evidence for ice-free summers with intermittent winter sea ice in the Arctic Ocean during the Late Cretaceous "“ a period of greenhouse conditions - gives a glimpse of how the Arctic is likely to respond to future global warming.Records of past environmental change in the Arctic should help predict its future behaviour. The Late Cretaceous, the period between 100 and 65 million years ago leading up to the extinction of the dinosaurs, is crucial in this regard because levels of...

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2009-01-08 16:50:00

The evolutionary history of diatoms -- abundant oceanic plankton that remove billions of tons of carbon dioxide from the air each year -- needs to be rewritten, according to a new Cornell study. The findings suggest that after a sudden rise in species numbers, diatoms abruptly declined about 33 million years ago -- trends that coincided with severe global cooling.The study is published in the Jan. 8 issue of the journal Nature.The research casts doubt on the long-held theory that diatoms'...

2005-12-02 11:41:09

ATHENS, Ga. "“ Lake Superior has a new native resident.  It's been hanging around the shore for years, but until now it was regarded as an intercontinental drifter, not a homegrown local. So say Rebecca Bixby of the University of Georgia and fellow researchers Mark Edlund of the Science Museum of Minnesota and Eugene Stoermer from the University of Michigan. In the latest issue of Diatom Research, the scientists describe a new species of diatom, Hannaea superiorensis, found...


Word of the Day
mallemaroking
  • Nautical, the visiting and carousing of sailors in the Greenland ships.
This word is apparently from a confusion of two similar Dutch words: 'mallemerok,' a foolish woman, and 'mallemok,' a name for some persons among the crew of a whaling vessel.