Sentences with phrase «calcareous marine»

Pre-bomb radiocarbon and the reservoir orrection for calcareous marine species in the Southern Ocean.

Not exact matches

Spicules are the calcareous remains of tiny, soft - bodied marine invertebrates such as sea fans and sea whips (corals), sea cucumbers and sponges.

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).

For us, it is a sign that many marine organisms actually can live and maintain their calcareous shells under chemically unfavorable conditions which may reflect their physiological and evolutionary history,» says lead author Dr. Mario Lebrato from the Institute of Geosciences at Kiel University (CAU).

To answer this question, the researchers analyzed marine sediment cores collected off Galicia (Spain) and from the Bay of Biscay, containing pollen and foraminifera, microscopic marine organisms with calcareous skeletons.

coccoliths: Microscopic structures of varying shape and size that are made of calcite, are secreted by calcareous nannoplankton, and are found in marine deposits from the Triassic period to the Recent.

Pink Beach — locally called Pantai Merah — has a mixture of white and red sand formed from pieces of foraminifera, a marine protozoan with calcareous shells, and is one of only seven of its kind in the entire world.

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.

«Acidification actually threatens all marine animals and plants with calcareous skeletons, including corals, snails, clams and crabs.

The marine biota also redistribute carbon: marine organisms grow organic tissue and calcareous shells in surface waters, which, after their death, sink to deeper waters, where they are returned to the dissolved inorganic carbon reservoir by dissolution and microbial decomposition.