Sentences with phrase «sea organisms living»

Not exact matches

Other living organisms indicating the Earth is far more than a few thousands of years old include Posidonia oceanica, a species of seagrass found in the Mediterranean Sea.

The team analysed the chemical composition of tiny shells built by organisms (foraminifera) that had lived in the water column and at the sea bottom before their shells became embedded in the seafloor sediments.

Sea spray is a complex mixture of inorganic salts, organic material present in the ocean and living organisms such as bacteria, viruses and fungi.

A throng of reef - dwelling organisms live on the edge of the Gulf of Mexico's continental shelf some 200 kilometers offshore, from corals in the shallower regions to sponges, sea fans and other soft corals, and numerous fish species in the deep.

That began to change last year with the discovery of DNA sequences for an organism that no one has ever actually seen living near a deep - sea vent on the ocean floor.

If the structure of Martian water is highly pressurised, perhaps we might expect to find organisms adapted to high pressure life similar to piezophiles on Earth, such as deep sea bacteria and other organisms that thrive at high pressure.

«The discovery of microscopic shells of organisms that lived in warm shallow seas, and of spores and pollen from land plants, reveal that the geography and climate of Zealandia were dramatically different in the past.»

What we see as a mere light in the sea is a phenomenon occurring in nearly all the organisms living in the seas and oceans, from bacteria to large fish, and which impacts the behaviour and dynamics of the entire system.

Using the most comprehensive conservation data available for both marine and non-marine organisms, research led by Dr Thomas Webb, from the University's Department of Animal and Plant Sciences, has shown that 20 to 25 per cent of the well - known species living in our seas are now threatened with extinction — the same figure as land living plants and animals.

For decades marine biologists have gotten glimpses of this glittering life by casting nets and retrieving deep - sea organisms.

In a new study recently published in the journal Global Biogeochemical Cycles, scientists of Kiel University (CAU) with colleagues from GEOMAR Helmholtz Centre for Ocean Research Kiel and international partners from the USA, New Zealand, and Great Britain studied marine benthic shell - forming organisms around the world in relation to the chemical conditions they currently experience — with a surprising result: 24 percent, almost a quarter of the analyzed species, including sea urchins, sea stars, coralline algae or snails, already live in seawater unfavorable to the maintenance of their calcareous skeletons and shells (a condition referred to as CaCO3 - undersaturation).

To untangle the impacts that these three climate stressors will have on seafloor diversity in the future, the researchers examined existing published data and collected new data on organisms living in deep - sea sediments in upwelling regions along continental margins, where the ocean and continental crusts meet along the seafloor.

During this time, large (up to meter - sized) soft - bodied organisms, often shaped like discs or fronds, had lived on or in shallow horizontal burrows beneath thick mats of bacteria which, unlike today, coated the sea floor.

Van Dover is a specialist in the ecology of deep - sea ecosystems that are powered by chemistry rather than sunlight, and Eggleston studies the ecology of organisms that live on the seafloor.

They studied regenerative capacity in three species of sea urchins with long, intermediate and short life expectancies: the red sea urchin, Mesocentrotus franciscanus, one of the world's longest - lived organisms with a life expectancy of more than 100 years; the purple sea urchin, Strongylocentrotus purpuratus, with a life expectancy of more than 50 years; and the variegated sea urchin, Lytechinus variegatus, with a life expectancy of only four years.

Hundreds of studies on bottom trawl impacts, including those on soft sediment habitats, have shown that trawling can remove or damage structure - forming organisms, alter the composition of communities living in the sea bed (infauna) and reduce their productivity.

«These are the same precursors seen in biominerals from sea urchin and abalone, which are different organisms from completely different branches in the tree of life, so the fact that they used exactly the same mechanism to form their skeletons is really surprising,» Gilbert explains.

The bottom of the sea is a biologist's wonderland, but scientists are only beginning to understand the even more mysterious organisms that live deep under its floorboards.

«We know very little about deep - sea organisms and their life - cycle patterns, in particular in the water column of the deep sea,» Hoving says.

Microbes such as bacteria are the most numerous organisms on Earth, and about 90 % of them live in sediments buried under the sea floor.

The archaea, single - celled organisms confused with bacteria until Dr. Woese's discovery, are of interest to biologists studying the origin of life because they have certain primitive features and a liking for extreme environments, like the boiling springs of Yellowstone National Park and the superheated waters that swirl from deep - sea volcanoes.

Scientists think Titan may also be able to support microbial life (though if that life teems in the hydrocarbon seas, it will be very different than organisms here on Earth).

But a siphonophore colony is made up of many parts that are each equivalent to free living organisms such as sea anemones and «true» jellyfish.

Marine mollusks can embed photonic structures into their curved shells without compromising shell strength; deep sea sponges evolved fiber optic cables to direct light to symbiotically living organisms; and brittlestars cover their skeletons with lenses to focus light into the body to «see» at night.

While a 300 - year - old tubeworm sounds impressive, it wouldn't be the longest living organism on Earth, or even in the sea.

This same «web of life» was thought to exist in the sea, whereby the carcasses or feces of organisms living in the euphotic, or lighted, region of the seas, descended to the bottom where they became a source of food for bottom dwellers.

Because this food supply was limited, it was thought that the numbers of organisms living in the deep - sea were limited.

The carbon captured by living organisms in oceans is stored in the form of biomass and sediments from mangroves, salt marshes, sea grasses and potentially algae.»

Up until this time, it was thought that organisms living in the deep sea depended on a constant «rain» of food from above, i.e. from the lighted regions of the ocean.

An international study to understand and predict the likely impact of ocean acidification on shellfish and other marine organisms living in seas from the tropics to the p...

From the opening on the sea floor to a few feet away from the vent, a temperature gradient is formed along which different organisms might live, depending on their temperature preference.

We will enclose in these mesocosms all the organisms that live in the sea water, including bacteria and plankton and will subject each bag to a different CO2 level in order to mimic what will happen up to 2100.

«The discovery of microscopic shells of organisms that lived in warm shallow seas, and of spores and pollen from land plants, reveal that the geography and climate of Zealandia were dramatically different in the past,» adds co-chief scientist Gerald Dickens.

Amoeba - like tiny organisms that live in the sea.

The carbonate sand (of which the beaches are made) is composed of broken skeletal fragments of the organisms that live in the reef and on the sea floor behind the reef.

THE OLDEST LIVING THINGS IN THE WORLD Rachel Sussman, essays by Carl Zimmer and Hans Ulrich Obrist University of Chicago Press Price: $ 45 A bulbous green blob of flowering plants in the Chilean desert and a «living fossil» in Namibia that resembles a collapsed sea monster — these are a few of the organisms Rachel Sussman photographed for this fascinatingLIVING THINGS IN THE WORLD Rachel Sussman, essays by Carl Zimmer and Hans Ulrich Obrist University of Chicago Press Price: $ 45 A bulbous green blob of flowering plants in the Chilean desert and a «living fossil» in Namibia that resembles a collapsed sea monster — these are a few of the organisms Rachel Sussman photographed for this fascinatingliving fossil» in Namibia that resembles a collapsed sea monster — these are a few of the organisms Rachel Sussman photographed for this fascinating book.

Food for thought, at the end of the Permian period, about 250 million years ago, approximately 90 % of life in the seas and 70 % of land dwelling organisms went extinct.

And the loss of the sea ice will mean the loss of an entire ecosystem, with repercussions that could include a major food chain, because of organisms that live on the underside of the sea ice.

The first data series — from calcareous shells of marine organisms that live 50 to 200 metres below the sea surface in the northern Atlantic — shows the temperature conditions there.

But seen the environmental global CRISIS of GLOBAL WARMING and its devastating climatological impact, I would recommend as an environmental policy - expert that Both NATURAL plankton will be bred in shallow waters as carbondioxide inhibitors in a large volume on the one hand and let nature goes its course in the seas and oceans so that sea - organisms / life - forms / mamals will not become extinct due to (for them) food poisoning.

Now imagine all of that — and all the plastic you deal with tomorrow, and the next day, and the nest — all of it here thousands of years from now, existing not only across land and sea, but in the bodies of living organisms.

Most Antarctic marine organisms, from microscopic phytoplankton to the Adélie penguin, depend on sea ice to live and reproduce.

Sea - ice biome - The biome formed by all marine organisms living within or on the floating sea ice (frozen sea water) of the polar oceaSea - ice biome - The biome formed by all marine organisms living within or on the floating sea ice (frozen sea water) of the polar oceasea ice (frozen sea water) of the polar oceasea water) of the polar oceans.

Background Ocean acidification is considered by climate alarmists to be detrimental to nearly all sea creatures; and the early life - stages of these organisms are generally thought to be the most sensitive stages to this environmental change.

If that will have any impact on sea life is doubtful as the main calcifying organisms evolved at much higher CO2 levels during the Cretaceous, witnessed by the white cliffs of Dover and many such places all over the world...

Organisms living in areas where upwelling of cool, low pH water occurs (e.g. Eastern Pacific and Baltic Sea) may be acclimatized / adapted to acidification [31 — 34], whereas those living in areas with strong warming (e.g. Eastern Australia) may be acclimatized / adapted to increased temperature [7,35].

What they brought back are some of the most fascinating photographs of Antarctic sea life ever seen — portraits of organisms on the front - line of global climate change.