Sentences with phrase «of sea organisms»

Since then, laboratory experiments have suggested that populations of sea organisms skyrocket when supplied bonus iron.

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.

According to the study, most of the highly toxic benzene and toluene in the oil were transported away in deep currents, along with other entrapped petroleum compounds that affected organisms on and near the sea floor.

This is before there was a lot of deep - sea video on the web, so my only encounters with deep - sea organisms had been in jars, on a lab shelf, or photos or pictures, which were largely grainy.

2017 revealed some surprising biology of organisms large and small, from quick - dozing elephants to sex - changing lizards and carbon - dumping sea creatures.

That is a clue to anyone who studies the distribution of organisms on Earth that there might be something different going on there,» says Rich Mooi, the Curator of Invertebrate Zoology and Geology at the Academy and a specialist in sea urchins who took part in the expedition.

Two thousand feet below the sea, in the cracks of the Mid-Atlantic Ridge, he and his students recently discovered single - celled organisms flourishing in highly alkaline water close to the boiling point.

The sea sponge may seem like an odd choice for genomic research considering that its simple body lacks muscles, organs, and nerve cells, but the creature provides a wealth of information on how multicellular organism arose.

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.

Excess amounts from human activities often end up in rivers, streams and coastal environments, causing algal blooms, loss of sea grass and low oxygen levels in the water, which can kill large numbers of fish and other organisms.

The team were able to draw these conclusions by analysing new data from the chemical composition of the fossilised shells of sea surface and seafloor organisms from that period, taken from drilling cores from the ocean floor in the South Atlantic.

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

Like the dinosaurs themselves, giant marine reptiles, invertebrates and microscopic organisms became extinct after the catastrophic asteroid impact in an immense upheaval of the world's oceans, yet deep sea creatures managed to survive.

In addition to leaving a void in a finely tuned ecosystem, the loss of sea stars would also disrupt a seeming iconic shoreline organism.

By eating mussels on the low shores in Oregon, sea stars keep those populations in check so the bivalves don't explode in numbers, at the expense of other organisms.

Others have tracked the first few hours of the embryonic development of sea urchins and other organisms with the goal of seeing how various transcription factors alter gene expression over time.

We see only a little bit of extinction — some groups of deep - sea foraminifera, one - cell organisms that go extinct at the start of this event.

«I didn't think that most of these coastal organisms could survive at sea for long periods of time,» said Greg Ruiz, a co-author and marine biologist at the Smithsonian Environmental Research Center.

To trace the molecular basis of memory, Kandel was using the sea slug Aplysia, a neurologically simple organism that contains only perhaps 20,000 neurons, many of them quite large.

Brandt led a small army of scientists on three expeditions to the Weddell Sea in Antarctica, where they collected bottom - dwelling organisms at 40 different locations, some in waters nearly four miles deep.

More than half of all of the oxygen in our atmosphere is generated by organisms in the sea.

Arguing that environmental regulations haven't kept pace with new science, the Washington, D.C. - based advocacy group Oceana last week petitioned Secretary of Commerce Don Evans to take immediate steps to protect the sea - floor organisms in U.S. waters.

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.

Most of the coastal rivers in North America once teemed with great runs of anadromous fishes — organisms that hatch in inland freshwater streams, migrate to the salty sea, then return to the streams to spawn.

By comparing the relative abundance of species of tiny organisms preserved in the deep - sea cores, PRISM scientists could roughly map how cold - loving organisms gave way to warm ones (and vice versa) at different times in the past.

When it died, it sank to the bottom of the sea floor with its skeleton falling apart and becoming a hub for coral and other organisms to grow on.

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.

Instead of seeking the standard quarry of deer or wild boar, Schleper was in search of Lokiarchaeota, or Loki, a newly discovered group of organisms first identified near deep - sea vents off the coast of Norway.

Shirley Pomponi, a marine biologist and the head of Harbor Branch Oceanographic Institution, is finding evidence that deep - sea organisms may provide a rich, largely untapped source of new medicines.

«They unearthed vast numbers and varieties of seashells, crinoid stems and parts, corals... and other sea organisms,» he wrote.

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.

A network of underwater cameras Rapid image capturing of microscopic organisms, such as single - celled protozoa, are adding to the collection of data that researchers are now using to create a picture of the sea change.

If the marine organisms had been scooped up from below sea level and dumped on the elevated promontory, something much bigger than a storm surge must have pounded the coast of ancient Crete.

Using special diving suits and submersibles, they have even entered the habitat of deep - sea organisms, watching in awe as the water world lit up with bursts of color that sparkled like fireworks.

An analysis of its stomach showed that it obviously chased smaller sea organisms and fed on them.

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 1991, the IMO adopted guidelines which recommend that ships should avoid taking on ballast in shallow areas and during toxic blooms of marine algae; keep accurate records of where and when ballast is loaded; exchange ballast water at sea, where toxic organisms are rare; and discharge sediments into approved areas at the port of destination («End of the line for deadly stowaways», New Scientist, 24 October 1992).

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).

Deep - sea organisms including mussels thrive in the extreme environments of hydrothermal vents and cold seeps which are characterised by high hydrostatic pressure, lack of photosynthesis - derived food, variable temperatures and high concentrations of toxic substances.

The general mechanisms of symbiosis revealed in the study are of relevance to other symbiotic organisms such as deep - sea tubeworms and giant clams.»

Additionally, a unique aspect of these AUVs is an integrated Environmental Sample Processor (ESP), a miniature robotic laboratory that collects and preserves seawater samples at sea, allowing researchers to capture a snapshot of the organisms» genetic material and proteins.

This is an important finding because current estimates of biological activity in surface waters of the ocean rely on instruments aboard satellites that measure the color of the sea surface, which changes along with levels of chlorophyll - a, an assessment that will miss blooms of other organisms, such as bacteria.

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.

Untapped resource Researchers at Scotland's University of Aberdeen Marine Biodiscovery Center (MBC) are studying the potential of deep - sea marine organisms as a source for new chemical compounds, which could be used to develop novel treatments for cancer, inflammation, infection and parasitic diseases.

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.

The hope is that these sea gliders, which can dive hundreds of meters and stay in the water for months at a time, will help to unlock the secrets of phytoplankton blooms that nourish the organisms in Antarctica's Ross Sea for a few months each year before mysteriously disappearisea gliders, which can dive hundreds of meters and stay in the water for months at a time, will help to unlock the secrets of phytoplankton blooms that nourish the organisms in Antarctica's Ross Sea for a few months each year before mysteriously disappeariSea for a few months each year before mysteriously disappearing.