Stratification - aquatic ecosystems, Biology

Stratification - Aquatic ecosystems

Aquatic ecosystems also exhibit marked stratification. In lake and ocean ecosystems light penetration, temperature and availability of oxygen varies with depth. In summer, a well stratified lake has a layer of freely circulating surface water with uniform temperature known as the epilimnion.

A second layer called metalimnion which is characterised by a thermocline (a very steep and rapid decline in temperature). The third layer - the hypolimnion, is a deep, cold layer of dense water, often low in oxygen; and a layer of bottom mud. In terms of availability of light, a water body is divided into two layers: an upper lighted zone which is dominated by phytoplanktons and where photosynthesis occurs vigorously and a lower layer in which decomposition is most active. The lower layer roughly corresponds to the hypolimnion and the bottom mud.

Posted Date: 1/19/2013 7:13:05 AM | Location : United States

Related Discussions:- Stratification - aquatic ecosystems, Assignment Help, Ask Question on Stratification - aquatic ecosystems, Get Answer, Expert's Help, Stratification - aquatic ecosystems Discussions

Write discussion on Stratification - aquatic ecosystems
Your posts are moderated
Related Questions
TYPE S OF BONE - On the basis of its texture , a bone is of two types - Spongy or cancellous or tubercular bone and Compact or periosteal or dense bone.

The goals of biological classification The world of animal diversity is quite complex and it requires an ability to recognise similarities and differences among organisms. Class

Class of Subphylum Uniramia - Insecta Class Insecta consists of nearly a million described species. There are more species of insects as compared to all the other species of a

Q. Show characteristics of food products? These sensory characteristics of food products. Food quality, as such, can be divided into three main categories i.e. i. Appeara

Avian (fowl cholera) Fowl cholera is a contagious septicaemic disease of almost all classes of fowl. The causal agent is Pasteurella multocida.Serotypes A:1 and A:3 are usually

How Simple Transposition of the Great Arteries Present after 30 Days ? A switch operation will have poor results, as the ventricle that has regressed will not be able to mainta

a) Which vitamin helps to maintain resistance to infectious diseases? b) Name two foods which are a good source of this vitamin.   a) Vitamin A (retinol) helps m

What are lateral meristems? Where can they be found and which type of plant growth do they promote? Lateral, or secondary, meristems, are the cambium and the phellogen (also ca

in what part of the human body aschelminthes found?

Why are the tropical forests also known as stratified forests? In tropical forests tall trees of various species have their crowns forming a superior layer under which diverse