Sentences with phrase «southern ocean phytoplankton»

This study is part of a long - term effort to unravel the role that Southern Ocean phytoplankton have played in past changes in the atmospheric concentration of carbon dioxide.

Le Quéré, C., Buitenhuis, E. T., Moriarty, R., Alvain, S., Aumont, O., Bopp, L., Chollet, S., Enright, C., Franklin, D. J., Geider, R. J., Harrison, S. P., Hirst, A., Larsen, S., Legendre, L., Platt, T., Prentice, I. C., Rivkin, R. B., Sathyendranath, S., Stephens, N., Vogt, M., Sailley, S., and Vallina, S. M.: Role of zooplankton dynamics for Southern Ocean phytoplankton biomass and global biogeochemical cycles, Biogeosciences Discuss., 12, 11935 - 11985, 2015.

Phaeocystis antarctica, a non-siliceous prymnesiophyte, dominates some Southern Ocean phytoplankton communities, but loses out to diatoms when bioavailable iron is low.

Not exact matches

Phytoplankton, tiny photosynthesizing organisms that bloom in the nutrient - rich waters of the Southern Ocean, suck up carbon dioxide from the atmosphere.

Phytoplankton, the food of tiny krill, a key element in the food web of the southern oceans, will be equally affected by acidification.

Southern Ocean sea spray, similar to this off the coast of Australia, can launch particles from phytoplankton that seed planet - cooling clouds.

A plethora of phytoplankton kick up clouds in the Southern Ocean, researchers report July 17 in Science Advances.

The Southern Ocean is the cloudiest place on Earth, a condition caused in part by phytoplankton particles kicked up by sea spray.

A different group of bacteria, also relying on the phytoplankton for food and energy, appear to compete with the diatoms for the precious vitamin, and all three groups of microbes are competing for iron, which, due to the extreme remoteness of the Southern Ocean, is a scarce and consequently invaluable resource.

Oceanographers have long recognized that iron fertilization in the Southern Ocean will drive phytoplankton blooms.

Massive icebergs calving off of Antarctic ice sheets and floating through the Southern Ocean deposit iron, which fertilizes the seawater and nurtures massive phytoplankton blooms.

Possible mechanisms include (iv) fertilization of phytoplankton growth in the Southern Ocean by increased deposition of iron - containing dust from the atmosphere after being carried by winds from colder, drier continental areas, and a subsequent redistribution of limiting nutrients; (v) an increase in the whole ocean nutrient content (e.g., through input of material exposed on shelves or nitrogen fixation); and (vi) an increase in the ratio between carbon and other nutrients assimilated in organic material, resulting in a higher carbon export per unit of limiting nutrient expoOcean by increased deposition of iron - containing dust from the atmosphere after being carried by winds from colder, drier continental areas, and a subsequent redistribution of limiting nutrients; (v) an increase in the whole ocean nutrient content (e.g., through input of material exposed on shelves or nitrogen fixation); and (vi) an increase in the ratio between carbon and other nutrients assimilated in organic material, resulting in a higher carbon export per unit of limiting nutrient expoocean nutrient content (e.g., through input of material exposed on shelves or nitrogen fixation); and (vi) an increase in the ratio between carbon and other nutrients assimilated in organic material, resulting in a higher carbon export per unit of limiting nutrient exported.

Satellite observations indicate that the iron - fertilised phytoplankton blooms north of South Georgia are amongst the most intense south of the Polar Front and form the largest seasonal sink of atmospheric CO2 in the Southern Ocean.

An international team of researchers has identified the genetic mutations which allowed microalgae (phytoplankton) from the Southern Ocean to adapt to extreme and highly variable climates — a step towards understanding how polar organisms are impacted by climate change.

Phytoplankton in the Southern Ocean could be driving temperatures in the region down, research suggests.

«Phytoplankton and Cloudiness in the Southern Ocean.»

Massive icebergs calving off of Antarctic ice sheets and floating through the Southern Ocean deposit iron, which fertilizes the seawater and nurtures massive phytoplankton blooms.

The phytoplankton - dependent krill populations in the Southern Ocean which are the staple food of all the great baleen whales are now down by 80 % and the shortfall is now also starving local fish species, penguins and seals.)

Most laboratory studies suggest that higher carbon dioxide concentration leads to decreased calcification in coccolithophores, the tiny phytoplankton that contribute to the base of Southern Ocean food webs.

Existing projections suggest an increase in primary production at high latitudes such as the Arctic and the Southern Ocean (because the amount of sunlight available for photosynthesis of phytoplankton goes up as the amount of water covered by ice decreases).

Strong El Niño / Southern Oscillation events have major impacts on phytoplankton, fisheries, marine birds and mammals and are striking examples of climatic influences on ocean biology.

Very little iron is needed and for a long time nobody could work out why there were low levels of phytoplankton but significant levels of nitrate, phosphate and silicate in the Southern Ocean.

When the theory was tested in a 115 - square - mile area of the Southern Ocean, tiny crustacean zooplankton ate up all the phytoplankton.