Biota of the neritic oceanic zone, Biology

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.

Posted Date: 1/19/2013 6:23:09 AM | Location : United States







Related Discussions:- Biota of the neritic oceanic zone, Assignment Help, Ask Question on Biota of the neritic oceanic zone, Get Answer, Expert's Help, Biota of the neritic oceanic zone Discussions

Write discussion on Biota of the neritic oceanic zone
Your posts are moderated
Related Questions
Thus animals store surplus carbohydrate as glycogen; plants do so in form of starch. Starch is producing in the stroma of chloroplasts and stored there as starch grains. The Starch

Write a short note on muscular system? The muscular system provides mobility and support to the body. There are three types of muscle tissue: skeletal, smooth, and cardiac. Th

The cells lining the inside of the cheek are frequently removed for making observations of basic cell structure. The cells are from stratified squamous epithelium. Explain a reason

What are the elements that constitute the stomata? The Stomata is made of a central opening the ostiole or slit delimited by two guard cells responsible for its closing or open

What is Prokaryotic Gene Expression ? Control of prokaryotic gene expression occurs primarily at the level of transcription. Prokaryotic genes are arranged in units consisting

Define about the Ishihara's Plates of eyes Ishihara's Plates: Following plates are available- Transformation, Vanishing, Hidden Digit and Diagnostic plates. 1) The plates ar

Phylum Coelentrat a : (9,000 'species) The body is radial and made up of two cell layers. Gastro-Vascular cavity is saclike, tentacles and stinging cells are present. They may

Define Categories of Indicators of Malnutrition? The indicators may fall under the following categories: 1. Macro indicators for sector-wide monitoring and evolution, 2.

Q. Under which conditions do aerobic cells carry out fermentation? Some cells that usually obtain energy from aerobic cellular respiration can perform fermentation when oxygen

Characteristics Define Cancer - Hyperplasia Hyperplasia is the extreme proliferation of cells which can be observed in normal as well as cancerous tissues. In normal tissue, a