Sentences with word «coccoliths»

Over the eons, layer after sedimentary layer of coccoliths created such landmarks as the White Cliffs of Dover.

They are covered in tiny plates of calcium carbonate called coccoliths, which fall to the sea floor when the organism dies.

But that was the time that the forefathers of the current planktonic coccoliths made the white cliffs of Dover and thick carbonate deposits in many other places.

Scanning electron microscope (SEM) images of the three main groups of large phytoplankton — diatoms, dinoflagellates, and coccolithophorids (those with coccolith shells)-- show that they can be arrestingly beautiful.

Ph.D. student Markus Geisen of the Natural History Museum in London was to lead a research project on a micropaleontology grant this summer but says he now plans to skip over to Germany for a short - term contract researching coccolith biology.

Intriguingly though, there was very little evidence for any response to ocean acidification, other than perhaps a slight thinning of C. pelagicus coccoliths..

Coccoliths range in size from one to thirty - five microns.

«Field evidence from the deep ocean is consistent with these laboratory conclusions, indicating that over the past 220 years there has been a 40 - percent increase in average coccolith mass.

Gunilla Gard; Late Quaternary coccoliths at the North Pole: Evidence of ice - free conditions and rapid sedimentation in the central Arctic Ocean.

The calcite in calcium carbonate allows coccoliths to scatter more light than they absorb.

Coccolith fossils are prominent and valuable calcareous microfossils (see Micropaleontology).

The production of coccoliths requires the uptake of dissolved inorganic carbon and calcium.

Hence, a high concentration of coccoliths leads to a simultaneous increase in surface water temperature and decrease in the temperature of deeper waters.

They are the most common of coccolithophorids, single - celled plants with overlapping plates called coccoliths, which are apparently used for protection.

A tidbit about what cycles:»... coccoliths evolved fairly recently.

But that was the time that the forefathers of the current sea species (mainly planktonic coccoliths) made the white cliffs of Dover and thick carbonate deposits in many places.

The blue - green water on the right, off the west coast of Alaska, represents a bloom of coccolithophores, a single - celled species known for its white calcium carbonate plates, called coccoliths.

The specific forms of each coccolith most likely evolved under pressure from zooplankton, the microscopic animal group a notch up the food chain that developed mandibles, claws, and other accoutrements for getting past the hard calcite coccoliths.

Other coccolithophorids, like Calcidiscus quadriperforatus (top center), also have discuslike plates, but coccoliths can take many forms.

Coccoliths are not always round, flat plates, like hubcaps; many look like trumpets, cabbage leaves, daisies, or stars.

Only later would scientists learn that coccoliths are calcite plates that surround some species of phytoplankton like armor.

Not knowing what they were, he dubbed them coccoliths, based on the Greek words for «seed» and «stone.»

The coccoliths of one species, Emiliania huxleyi — named after Huxley — reflect sunlight, turning thousands of square miles of water white or aqua.

The response of each species was, however, different, and involved intervals of slowed growth in C. pelagicus and an overall reduction in the size of the skeletal components — coccoliths — in T. pertusus.

Single - celled calcifying algae such as Emiliania huxleyi store carbon dioxide in their calcium carbonate platelets (Coccoliths).

If we understand better the costs and benefits of their distinguishing feature (coccoliths) then this should help us understand why their biogeography is shifting.»

Some wrap themselves in an impenetrable coat of coccoliths, some make coccoliths in the form of sharp spikes, some use them as parasols against the sun and some form funnel - shaped light collectors.

coccoliths: Microscopic structures of varying shape and size that are made of calcite, are secreted by calcareous nannoplankton, and are found in marine deposits from the Triassic period to the Recent.

Coccoliths can accumulate in such abundance as to form rocks in their own right, and they are the main constituent of chalk, which forms the White Cliffs of Dover.

The study, which propagated 700 generations of the coccoliths *, pointed out the value of longer - duration experiments.