Sentences with phrase «by diatom»

According to Ingall, removal of iron by diatom - dominated phytoplankton communities may dampen the intended outcome of enhanced carbon uptake through iron fertilization by reducing the productivity of other phytoplankton, which take up carbon dioxide more efficiently.

Back in the laboratory, the group isolated three compounds called aldehydes produced by the diatoms.

Ingall found that iron addition via these sources barely keeps pace with subtraction by diatoms.

«Uptake of iron by diatoms is significant compared to what Mother Nature is able to naturally add to the ocean,» he said.

All that said, up to half the iron preferred by diatoms, especially in iron - deprived areas like the Southern Ocean, may become unavailable.

All that said, up to half the iron preferred by diatoms, especially in iron - deprived areas like the Southern Ocean, may become unavailable.

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.

Previously, many water managers in the region had believed that the algae blooms of the diatom Didymosphenia geminata — which resemble blobs of wet toilet paper or shag rugs — resulted from an invasive species problem starting in the mid-2000s that could be fixed by regular washing of fishing gear and other sanitation measures.

Domoic acid, a neurotoxin that causes amnesic shellfish poisoning in humans, is produced by marine diatoms in the genus Pseudo-nitzschia.

This is the case of diatoms, algae consisting of a single cell surrounded by a silica skeleton, recommended by the European Union and Switzerland as one of the ideal bioindicators for rivers and lakes.

In a presentation at a recent ocean acidification conference, Tatters reported that the more CO2 and the less silicate, the higher the diatom's toxin production — more than doubling at the level of dissolved CO2 scientists expect the oceans to reach by 2100.

Diatoms between 0.01 and 0.02 mm, consisting of a single cell surrounded by an artificially colored silica skeleton.

A new study shows that at least two diatom species make compounds that reduce hatching rates when eaten by tiny shrimplike animals called copepods.

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

As the temperature and acidity of a test tank climb, diatoms that dominate the cold northern oceans fall off steeply in number — an ominous sign, given that they currently support by far the richest fisheries in the world.

Red tides are produced by algae called diatoms.

However, the scientists showed that the diatoms were solely attracted by the odor of the silicate.

Ramachandra and his colleagues propose to genetically modify diatoms by manipulating the genes that produce oil so that they enhance its production.

The oil can be as much as a quarter of the total mass of a diatom cell, and if a way could be found to efficiently wrest it from diatoms, he adds, a hectare of «diatom cultivation could produce 10 to up to 200 times the oil that is produced by soybean cultivation,» Ramachandra says.

Hitchhikers Dust from the Mojave Desert (above left, 2,500 x magnification) contains an array of mineral grains, as well as a diatom, a single - celled aquatic organism commonly carried by dust.

«Generally, a polar bear eats things that start feeding on a diatom, and is probably not fed by something that feeds on Prochlorococcus, for example,» Dutkiewicz says.

«Without the existence of these proteins that could help phytoplankton cope in these stressful environments, the phytoplankton diversity in many regions of the ocean would be much lower, in particular by reducing large phytoplankton such as diatoms that are known to take up a lot of carbon dioxide, thus possibly accelerating the pace of a warming planet,» said Marchetti, assistant professor of marine science at UNC - Chapel Hill.

Don't miss great articles from other sections, like «Water microbiome» where I would recommend an article deciphering the evolution and metabolism of an anammox bacterium by M. Strous and an article about globally overlooked nanoplanktonic diatoms by K. Leblanc.

Major consequences of such changes over regional scales will probably include (1) reductions in primary production combined with (2) shifts from diatom - dominated (low SA: V ratio) phytoplankton assemblages with high POC - export efficiencies to picoplankton communities (high SA: V ratio) characterized by low export efficiencies (Smith et al., 2008; Morán et al., 2010; Morán et al., 2015).

In 1998, sea lion deaths on the California coast also were associated with domoic acid, which entered the food chain via toxigenic diatoms, which were eaten by anchovies that in turn were eaten by the sea lions.

And yet, it's also possible that up to 44 % of the carbon grabbed by these plentiful diatoms could be left in the atmosphere, if we continue with business as usual.

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.

J. Craig Venter Institute - led team awarded $ 10.7 M by DOE to boost lipid production in diatoms for next - gen biofuels and bioproducts

When a flea, ant, spider, etc. comes into contact with the remaining sharp edges of the diatoms, they lacerate the waxy exoskeleton of the bug and the powder absorbs the body fluids causing death by dehydration.

The latter work opposite to diatoms, because by sequestering calcium (Ca +2) ions they actually tend to acidify the ocean, and drive CO2 back into the atmosphere.

Between AD 500 and 700 and the Little Ice Age phase 2 (LIA 2 — AD 1630 — 1850), the frequent typhoons were inferred by coarse sediments and planktonic diatoms, which represented more dynamical climate conditions than in the LIA 1.

This biomarker is only biosynthesized by specific diatoms living in the Arctic sea ice and thus named «IP25» (= ice proxy with 25 carbons) 30.

And yet, it's also possible that up to 44 % of the carbon grabbed by these plentiful diatoms could be left in the atmosphere, if we continue with business as usual.

Global solar irradiance reconstruction [48 — 50] and ice - core based sulfate (SO4) influx in the Northern Hemisphere [51] from volcanic activity (a); mean annual temperature (MAT) reconstructions for the Northern Hemisphere [52], North America [29], and the American Southwest * expressed as anomalies based on 1961 — 1990 temperature averages (b); changes in ENSO - related variability based on El Junco diatom record [41], oxygen isotopes records from Palmyra [42], and the unified ENSO proxy [UEP; 23](c); changes in PDSI variability for the American Southwest (d), and changes in winter precipitation variability as simulated by CESM model ensembles 2 to 5 [43].

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.

like maize, sugar cane, sorghum, pineapple, orchids, cacti, sedums, marine diatoms (about 40 % of plankton by contribution to photosynthesis)..

Benthic biofilms are composed of a community of photoautotrophic organisms, predominantly diatoms and cyanobacteria, together with heterotrophic microbes, bound together by an extracellular polymeric substance (EPS).