Sentences with phrase «calcareous shells»

"Calcareous shells" refers to the hard outer coverings made of calcium carbonate that certain marine creatures, such as mollusks, crustaceans, and some types of algae, have. Full definition
Raised CO2 in aquatic systems can also lead to physiological stress, difficulty in building calcareous shells etc. (as will happen if atmospheric CO2 continues to build up beyond around 700ppm - the so called ocean acidification effect).
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.
That additional acidity gained from carbon dioxide in sea water is affecting many species with calcareous shells and having the most significant effect on hard corals, which also use calcium carbonate to build their home
According to their study in The ISME Journal this alga lives in symbiosis within a unicellular organism, a ciliate, which measures around a hundred micrometers and makes a calcareous shell.
This process, termed ocean acidification, makes it energetically more costly for calcifying organisms to form their calcareous shells and skeletons.
«Presumably, the algae built their calcareous shells as a protection against predators.
«Despite this wealth of species and habitats, little is known about the evolutionary history of the Cladocera,» explains Dr. Kay Van Damme of the Senckenberg Research Institute in Frankfurt, and he continues, «Since the animals do not possess a calcareous shell or carapace, they are only rarely preserved as fossils.»
Coccolithophores, single - celled phytoplankton, which plays a vital role in marine biogeochemical cycling, in marine food webs and in the global climate system, has developed a variety of calcareous shells to protect itself against predation and damage.
As the calcareous shells of crustaceans that lived in the sea were discarded, they built up on the floor, and eventually became calcium carbonate — limestone.
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.
Much of his recent research efforts are focused on using boron isotopes in the calcareous shells of foraminifera to reconstruct the state of the oceanic carbonate system in the geological past.
Ocean acidification is often considered in terms of its direct negative effects on the growth and calcification of organisms with calcareous shells or skeletons.
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