Sentences with phrase «oxygen from seawater»

This flows into a network of branched tubes called the respiratory tree, which takes in oxygen from the seawater.

Oxygen from seawater permeated only the upper millimeter or so of sediment, but the researchers noticed something happening much deeper in the mud, more than a centimeter below, as if oxygen were available down there, as well.

Not exact matches

Microorganisms living in basaltic sea floor buried beneath sediments derive energy from inorganic components from the host rocks that interact with infiltrating seawater, which brings dissolved oxygen and other trace nutrients with it.

In order to solve this question, the team took samples from the seabed, from the boundary layer between the seabed and seawater, as well as from different water layers in the tropical oxygen minimum zone during the Expedition M92 with the German research vessel METEOR in January 2013.

The researchers knew how much oxygen should have diffused down into each section of sediment from the seawater, so any «missing» oxygen meant microbes had consumed it.

Lowest readings of dissolved oxygen were found in late summers, as is the case in other estuaries along the Oregon coast, when incoming salty seawater settles longer in the estuary and warmer, drier conditions reduce the amount of fresh water from the Coos River.

By Year 1.1 billion, deep - sea hematite - bearing rock found in the Marble Bar chert formation of northwestern Australia indicates that iron - rich water gushed from volcanically heated seafloor vents were able to mix with cooler oxygen - rich seawater (Ohmoto et al, Nature Geoscience, March 15, 2009; PSU press release, and in EurkaAlert; and Sid Perkins, ScienceNews, April 11, 2009).

«The other carbon dioxide problem», «the evil twin of global warming», or part of a «deadly trio», together with increasing temperatures and loss of oxygen: Many names have been coined to describe the problem of ocean acidification — a change in the ocean chemistry that occurs when carbon dioxide (CO2) from the atmosphere dissolves in seawater.

The microbes (bacteria and Archaea) which form the base of the food chain are chemosynthetic, using energy from hydrogen sulfide in the vent fluid, and oxygen and carbon dioxide from the seawater, to create simple sugars.

Sea ice melt (SIM) also has relatively low salinity (S < 5), but its oxygen isotopic composition is similar to that of seawater, from which it is formed (δ18O ≅ 0 to — 6 ‰).

Since the roots of these mangroves are in seawater and muds where no free oxygen is present (anaerobic), the trees have developed specialized branches to remove oxygen from the atmosphere.

just a small example: rain washes CO2 from the air into the sea - > water turns CO2 into carbonic acid - > coral absorbs that compound — > keeps the carbon for itself - > releases the oxygen from the CO2 molecule, to replenish the seawater with oxygen.

The scientists collected seawater from various depths and measured the ratios of certain oxygen and nitrogen isotopes in the samples.

It also warned of a fast drop in dissolved oxygen in seawater — with predictions of a 1 - 7 per cent decline by 2100 caused by the effects of global warming and nutrient runoff into the sea from agricultural fertilizers and sewage.

In fact, certain of TEPCO's actions in the aftermath of the explosions have been confused and, some might opine, lacking discipline of purpose to the extent that expedient decisions have been made without proper forethought and judiciousness to avoid knock - on consequences: for example, the injection of seawater may have resulted in salt deposits sufficient to foul cooling flows in the lower regions of the RPV [reactor pressure vessel]; the liberation of hydrogen from seawater is more rampant than from freshwater and radiolysis of oxygen from the cooling water could provide stoichiometric conditions and ignition with hydrogen in the absence of air in the containments; and the latest and most recent announcement to deploy a nitrogen purge to the Unit 1 reactor seems yet another ill - explained and unjustified desperate measure».