Biota of the neritic oceanic zone, Biology

Assignment Help:

Biota of the Neritic Oceanic Zone

This zone constitutes 75 per cent of the total oceanic area and is relatively rich in species and high in productivity owing to factors such as penetration of light to considerable depths and high concentrations of nutrients. Communities in this region are both richer and more diverse compared to those of the open ocean. No other region has such a variety of life not even 'the tropical rain forests. The most productive phytoplanktons are the dinoflagellates and diatoms, though red, brown and green algae attached to the bottom in the shallow regions may be significant. The zooplanktons are usually similar to those of the pelagic zone though some purely open-sea species are replaced by neritic species.

Temporary zooplanktons are more numerous here than in the open sea. Nekton in the ocean over neritic zone or the continental shelf are diverse and commonly known, for they include almost all commercial species .as well as whales, seals, sea-otters, sea snakes and large squids. Fishes are numerous and include several shark species as well as herring-like species (sardine, herring) cods and their relatives (haddock and pollack), sea trout and salmon, flat fish (sole, halibut) and mackerals including tuna and bonito. The benthic part of the neritic zone is called the sublittoral zone which has a wide variety of animals among which are clams, shrimps, snails, lobsters, crabs, sea cucumber, starfish, brittle stars, anemones, sponges, bryozoa, annelids and foraminifera. These animals exhibit more diversity than those of the deeper waters, since the physical factors here are more variable. The bottom may be rocky, sandy or muddy and the temperature difference in the sublittoral zone of this region is greater as compared to the deeper ecosystems. The difference in- the physical environment is reflected in the benthic community occurring here.


Related Discussions:- Biota of the neritic oceanic zone

Define the soil genesis, SOIL GENESIS Soil a product of evolution, is c...

SOIL GENESIS Soil a product of evolution, is constantly changing as the landscape changes. It is a product of the interaction of five factors: parent material, climate, organis

Diagnosis and treatment of infective endocarditis, Diagnosis Health hi...

Diagnosis Health history - any recent surgery/dental procedures, history of heart disease, recent infectious diseases, etc. Clinical Manifestation Laboratory

Absorption of photic energy for photosynthesis, Q. What is the main molecul...

Q. What is the main molecule responsible for the absorption of photic energy for photosynthesis? And where is that molecule located in photosynthetic cells? The chlorophyll mol

Explain penicillin allergy, Penicillin allergy Cefazolin is often used ...

Penicillin allergy Cefazolin is often used for prophylaxis in penicillin-allergic patients, but such patients rarely may have allergic reactions to cephalosporins. When allergy

How are platelets formed, How are platelets formed? What is the function of...

How are platelets formed? What is the function of platelets? What consequences does the clinical condition known as thrombocytopenia yield? Platelets, also called as thrombocyt

Measures to be taken to avoid fire and in event of a fire, (a)    Bedroom ...

(a)    Bedroom :                    ·           Do not place room heaters near any inflammable materials.                  ·           Do not use heaters

Prodigality of nature, By prodigality of nature it is meant that organisms ...

By prodigality of nature it is meant that organisms have an enormous potential to reproduce. A carp or salmon is known to lay over a million eggs. A frog may lay Bs many as 12,000

Carbohydrate metabolism, CARBOHYDRATE METABOLISM The endproducts of car...

CARBOHYDRATE METABOLISM The endproducts of carbohydrate digestion absorbed into the blood and taken to  the liver by  hepatic portal vein  are four  monosaccharide sugar  ( C 6

Taxonomy, . Explain why the traditional classification of unicellular euka...

. Explain why the traditional classification of unicellular eukaryotes as ‘protozoa’ or ‘protists’ is invalid in terms of modern systematics and evolutionary theory. Why are trad

Phylum placozoa, Phylum Placozoa The phylum Placozoa contains a single...

Phylum Placozoa The phylum Placozoa contains a single species of a minute marine animal Trichoplax adharens composed of a dorsal and ventral epithelial layer enclosing loose m

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd