Sentences with word «calcareous»

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.

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.

Ocean acidification is often considered in terms of its direct negative effects on the growth and calcification of organisms with calcareous shells or skeletons.

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).

These responses include impacts on calcification rates [18,19], immune function [20], reproduction and carryover effects in larval and juvenile stages of invertebrates [21], enhanced productivity in phytobenthos [22 — 25] but reduced calcification and growth in calcareous algae [26 — 28].

Now I have little bottles of the oleo - calcareous ointment all over the house (doesn't solve my clutter problem) so I always shave it on hand.

• Cleaned calcareous deposits, accretions and stains from teeth and gums.

Ability to clean calcareous deposits and stains from teeth and gum margins.

Do not use harsh chemicals or products that contain lemon, vinegar, or other acids on marble or other calcareous stones and never use scouring powers or creams on any stone surface.

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.

Calcareous matter, if it is to be made malleable, needs to be embedded in a vast mass, and perhaps its reshaping is a process of immense slowness.

One of the most likely consequences is the slower growth of organisms forming calcareous skeletons or shells, such as corals and mollusks.

Here you'll find corals, shells and many other calcareous organisms exposed above water.

However, as they continue, «in four of the 18 species (limpets, purple urchins, coralline red algae, calcareous green algae), net calcification increased relative to the control under intermediate CO2 levels (605 and 903 ppm), and then declined at the highest CO2 level (2856 ppm).»

Most soil is limestone in origin, generally shallow and stony, though there are areas of slightly deeper and more fertile calcareous soil.

The main carbon sink is ocean calcareous phytoplankton like coccolithophores, and diatoms.

Just after you were born Europe and her limestone cities swirled with last - breath calcium blasted into the air yet you tell of chewing plaster out of your nursery wall and how at your first refugee - child Christmas you ignored the candled sweets and gnawed the pine tree's base of calcareous brittle.

2007 brought us Sexy Wine Bomb, Calcareous Twisted Paso Main Squeeze, and Sobon Estate's Vicious Red Blend.

Thrives in well - drained limestone, calcareous clay or sandy loam.

And other fish are aged by measuring calcareous bodies that grow in their ears, but this doesn't work for sharks.

The reason is that Emiliania's dense calcareous platelets function as ballast in aggregated organic matter and accelerate its sinking to the deep ocean.

Estonia used to be home to approximately one - third of the world's calcareous alvar grasslands, one of the most species - rich plant communities in Europe.

The MIS 5c paleosol (Unit D — 95 ± 7 ka) consists of poorly sorted silts and medium - grained sands, with calcareous rhizolith casts and phytoliths which indicate C3 Pooid - dominated grassland with some tree cover and C4 Panicoid, but little C4 Chloridoid grass cover; this interpretation is corroborated by δ13C values of 23 %.

The phytoplankton also include the single - celled calcareous algae, coccolithophores such as Emiliania huxleyi.

Calcareous reef habitats in the northern Atlantic could therefore be especially hard - hit (Figure 2).

An exceptionally porous form of travertine is known as calcareous tufa.

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

The team said the eggshells were pliable with hard calcareous exteriors and soft inner membranes, similar to the eggs of some snakes.

They collect corals of sediments, they take samples of the various calcareous organisms in them and do measurements for instance of the isotopic composition of the shells.

Geodes in sedimentary rocks are usually found in limestones, dolomites, and calcareous shale.

There is high incidence of calcareous pericarditis, and calcified lesions of the testes, tongue and skeletal muscle.

Modern sediments around the site include sandy - muds in inland lagoons (composed mainly of peneroplid foraminifera) and on the windward side, a 3.3 yard raised beach 44 - 98 yards wide, of calcareous sand.

These are called the Toledo Beds and consist mainly of thin bedded shales and mudstones, with some blue calcareous (calcium derived) sandstones and patches of limestone.

The area boasts hotels, a casino, great nightlife and many restaurants, but it is also steeped in legend and home to a beautiful calcareous island.

Calcareous nannofossils from approximately the past 7000 yr of the Holocene and from oxygen isotope stage 5 are present at 39 analyzed sites in the central Arctic Ocean.

Along gradients of normal pH (8.1 — 8.2) to lowered pH (mean 7.8 — 7.9, minimum 7.4 — 7.5), typical rocky shore communities with abundant calcareous organisms shifted to communities lacking scleractinian corals with significant reductions in sea urchin and coralline algal abundance.

«Coral reefs have already taken a big hit from recent warm temperatures, but rapid rises in carbon dioxide cause acidification, which adds a new threat: the inability of corals to create calcareous skeletons,» said Harvell.