Sentences with phrase «from ice algae»

In a second step, the researchers confirmed the presence of carbon from the ice algae in the fish.

«When we find the fatty acids from the ice algae in the meat or tissues of a fish, it tells us the fish or its prey must have fed on the algae,» says Kohlbach.

Not exact matches

Seeing these discouraging results, Woodruff and colleague Lonnie Shea, a materials scientist, suggested suspending individual immature follicles in tiny beads of alginate, a substance derived from brown algae and commonly used as an ice cream thickener.

And at high global latitudes, cold lakes normally covered by ice in the winter are seeing less ice year after year — a change that could affect all parts of the food web, from algae to freshwater seals.

By taking ice samples for the last five winters and analyzing for the chlorophyll produced by algae and photosynthetic bacteria, Twiss and his team have determined that from November to April the Lake experiences great primary productivity, more so than in spring or summer.

But the latest research into sulphur - producing algae, ancient ice cores, and sea sediments from the North Atlantic region could help climatologists

These include Arctic cod and capelin, while krill and Calanus finmarchicus are replaced by Arctic amphipoda (another group of crustacean zooplankton), which live on ice algae which are also absent from Atlantic water.

It could be a change in algae or other food for them, or it could be that sea ice provides shelter from predators, or affects the currents in some way.

4 Lipids and fatty acids in ice algae and phytoplankton from the Marginal Ice Zone in the Barents Sice algae and phytoplankton from the Marginal Ice Zone in the Barents SIce Zone in the Barents Sea.

Seafloor sediments show that during past ice ages, more iron - rich dust blew from chilly, barren landmasses into the oceans, apparently producing more algae in these areas and, presumably, a natural cooling effect.

In a core of sediments taken from the sea floor that was once covered by the Larsen A Ice Shelf, researchers led by Dr. Eugene W. Domack, a professor of geology at Hamilton College in Clinton, N.Y., found the tiny fossils of marine algae.

Scientists have found algae remains beneath the West Antarctic ice far inland from the present ocean, a sign that the ice sheet had entirely melted at some time in the last two million years.

From historic droughts around the world and in places like California, Syria, Brazil and Iran to inexorably increasing glacial melt; from an expanding blight of fish killing and water poisoning algae blooms in lakes, rivers and oceans to a growing rash of global record rainfall events; and from record Arctic sea ice volume losses approaching 80 percent at the end of the summer of 2012 to a rapidly thawing permafrost zone explosively emitting an ever - increasing amount of methane and CO2, it's already a disastrous train - wrFrom historic droughts around the world and in places like California, Syria, Brazil and Iran to inexorably increasing glacial melt; from an expanding blight of fish killing and water poisoning algae blooms in lakes, rivers and oceans to a growing rash of global record rainfall events; and from record Arctic sea ice volume losses approaching 80 percent at the end of the summer of 2012 to a rapidly thawing permafrost zone explosively emitting an ever - increasing amount of methane and CO2, it's already a disastrous train - wrfrom an expanding blight of fish killing and water poisoning algae blooms in lakes, rivers and oceans to a growing rash of global record rainfall events; and from record Arctic sea ice volume losses approaching 80 percent at the end of the summer of 2012 to a rapidly thawing permafrost zone explosively emitting an ever - increasing amount of methane and CO2, it's already a disastrous train - wrfrom record Arctic sea ice volume losses approaching 80 percent at the end of the summer of 2012 to a rapidly thawing permafrost zone explosively emitting an ever - increasing amount of methane and CO2, it's already a disastrous train - wreck.

This hypothesis would be in line with the biomarker data from the central Arctic Ocean sites PS2200 - 5 and PS51 / 038 -3 pointing to a more closed and thick ice cover that has prevented both phytoplankton as well as sea ice algae production (Figs. 2a, b, 3b).

Strong katabatic winds related to the ice sheets (shown tentatively as stippled black arrows), were probably responsible for ice - free polynya - type conditions off the major ice sheets, causing phytoplankton and sea - ice algae productivity recorded in cores PS2138 - 3 and PS2757 - 8 (for the region off the Greenland - Laurentide Ice Sheet no proof from sediment cores are availabice sheets (shown tentatively as stippled black arrows), were probably responsible for ice - free polynya - type conditions off the major ice sheets, causing phytoplankton and sea - ice algae productivity recorded in cores PS2138 - 3 and PS2757 - 8 (for the region off the Greenland - Laurentide Ice Sheet no proof from sediment cores are availabice - free polynya - type conditions off the major ice sheets, causing phytoplankton and sea - ice algae productivity recorded in cores PS2138 - 3 and PS2757 - 8 (for the region off the Greenland - Laurentide Ice Sheet no proof from sediment cores are availabice sheets, causing phytoplankton and sea - ice algae productivity recorded in cores PS2138 - 3 and PS2757 - 8 (for the region off the Greenland - Laurentide Ice Sheet no proof from sediment cores are availabice algae productivity recorded in cores PS2138 - 3 and PS2757 - 8 (for the region off the Greenland - Laurentide Ice Sheet no proof from sediment cores are availabIce Sheet no proof from sediment cores are available.

At least four key findings from these projects relating to arctic heterotrophic food web, pelagic - benthic coupling and biodiversity have emerged: (1) Contrary to a long - standing paradigm of dormant ecosystems during the long arctic winter, major food web components showed relatively high level of winter activity, well before the spring release of ice algae and subsequent phytoplankton bloom.

Surface ice algae produce dark pigments to protect themselves from high intensity radiation, further darkening the sheet surface, Stibal said.

Ice plays an important role in the development and sustenance of temperate to polar ecosystems because it creates conditions conducive to ice - edge primary production, which provides the primary food source in polar ecosystems; it supports the activity of organisms that ensure energy transfer from primary producers (algae and phytoplankton) to higher trophic levels (fish, marine birds, and mammals); and, as a consequence, it maintains and supports abundant biological communitiIce plays an important role in the development and sustenance of temperate to polar ecosystems because it creates conditions conducive to ice - edge primary production, which provides the primary food source in polar ecosystems; it supports the activity of organisms that ensure energy transfer from primary producers (algae and phytoplankton) to higher trophic levels (fish, marine birds, and mammals); and, as a consequence, it maintains and supports abundant biological communitiice - edge primary production, which provides the primary food source in polar ecosystems; it supports the activity of organisms that ensure energy transfer from primary producers (algae and phytoplankton) to higher trophic levels (fish, marine birds, and mammals); and, as a consequence, it maintains and supports abundant biological communities.