Sentences with phrase «diatom shells»

Might be some proxy for total primary productivity, or biomass, or respiration, or photosynthesis, or chemistry of diatom shells or lack thereof in each slice of the sediment core.

Foram shells are made up of calcium carbonate (CaCO3) while diatom shells are composed of silicon dioxide (SiO2).

Remains of foram and diatom shells can be found by taking sediment cores from lakes and oceans, since their shells get buried and preserved in sediment as they die.

Measurements of stable isotopes of planktonic and benthic foram and diatom shells have been taken from hundreds of deep - sea cores around the world to map past surface and bottom water temperatures.

Might be some proxy for total primary productivity, or biomass, or respiration, or photosynthesis, or chemistry of diatom shells or lack thereof in each slice of the sediment core.

The slide contained around a hundred crushed diatom shells.

He spotted the glassy shards of ancient diatom shells — the remains of microscopic phytoplankton that lived here at warmer times in the past, when a shallow sea covered much of West Antarctica.

Scherer would later find dozens of crushed diatom shells in his samples — possible remnants of microscopic aquatic organisms from when the site of Lake Whillans was a shallow seafloor.

Not exact matches

As an algae biologist I was initially struck by the cover graphic: a stained glass window made of diatoms, the tiny planktonic creatures whose exquisite outer shells are visible only through the electron microscope.

It's naturally occurring soft sedimentary rock made of fossilized hard shelled diatoms.

At that time, there were lots of nutrients in the ocean water there, because small organisms called diatoms, which have silica shells, were able to thrive.

The researchers also studied variables related to other ocean plant groups, like diatoms, which build glass shells that carry carbon to the deep sea, sequestering it from the atmosphere.

Diatoms [a type of shelled algae] are big carbon sinkers because of their stony shells and powered buoyancy.

To bury carbon at sea requires promoting particular species in the bloom, such as diatoms — shelled algae.

By contrast, the shell of the diatom Cyclotella pseudostelligera is silica, the material that makes up sand, glass, and quartz.

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.

Two paleobiologists (including Claire Allen are collecting seawater samples every 20 minutes and filtering out the diatoms (algae with silica shells).

Diatoms are a favorite tool among ecological and evolutionary researchers because their hard silica shells are often well preserved — and they have been found in virtually every type of water body on Earth, both fresh and salt, from oceans to farm ponds, from the Great Lakes to the West African coast.

Few diatoms grew in Smetacek's bloom because he fertilized waters that had low levels of silicon, which is required for their shells.

But silicon (an element that has properties both of metals and non-metals) seems to occur only in bioinorganic compounds, such as those in the silica shells of the single - celled algae diatoms.

A glassy object snapped into focus — a round disk, serrated on the edge, perforated with dimples — the shell of an aquatic microscopic organism called a diatom.

One key to the whole experiment's success turns out to be the specific diatoms involved, which use silicon to make their shells and tend to form long strands of cellular slime after their demise that falls quickly to the seafloor.

At present, scientists have no way to ensure that the desired species of silica - shelled diatoms bloom.

Georgia Tech research published online Monday in Nature Communications indicates that diatoms stuff more iron into their silica shells than they actually need.

The diatoms form a very hard shell of silica in a tubular shape.

Dr. Knight has extensively tested a product produced by Perma - Guard that is also available through WisdomWays in Edgewood, Colorado.58 Diatomaceous earth comes from fossilized shells of freshwater diatoms and is found in vast deposits all over the earth.

Diamotaceous Earth is a fine white powder, made from crushed shells of microscopic aquatic creatures called Diatoms.

Fleas and other insects with an exoskeleton (hard shell) are susceptible to the glass - sharp edges of the microscopic diatoms.

Diatomaceous Earth (DE) is made of diatoms from fresh water shells that have fossilized over millennia.

Diatomaceous earth is an all - natural powder made from the fossilized remains of tiny, hard - shelled algae called diatoms.

In the linked comment, and its links, there's a discussion of the balance between diatoms, which incorporate silica (tes) in their shells, and coccolithophores, which use calcium carbonate.

It is laid down over geologic ages in coral, shells, the detritus of diatoms and as precipitate in sediments.

As discussed in Natural Cycles of Ocean Acidification, diatoms are large, produce siliceous shells, and more rapidly shuttle CO2 from the surface to ocean depths.

At any rate, when «normal» rain containing natural carbonic acid falls upon silicon - containing sedimentary rocks formed over eons from the shells of tiny marine creatures — radiolarians, diatoms and some sponges — this «siliceous» rock combines with the carbonic acid to form ions of bicarbonate.

Forams and diatoms are shelled organisms found in aquatic and marine environments.

Diatoms - Silt - sized algae that live in surface waters of lakes, rivers and oceans and form shells of opal.

When hard - shelled algae called diatoms fossilize, they create a sedimentary rock that is easy to crumble called diatomaceous earth.