Detritus food chains, Biology

Detritus Food Chains

Detritus food chains begin with dead organic matter which is an important source of energy. A large amount of organic matter is contributed by the death of plants, plant parts, animals and their excretion products. These types of food chains are present in all ecosystems but they are over dominating in forest ecosystems and shallow water communities. Various species of microscopic fungi, bacteria and other saprophytes play a prominent role in decomposing organic matter to obtain energy needed for their survival and growth. In this process they release various nutrients, locked in dead organic matter, which are used readily by the green plants. Detritus food chains are interconnected with grazing food chains and other auxiliary food chains through certain specific common organisms to permit crossing over of energy and material flow from one circuit to another.

For example, cattle do not assimilate all of the energy stored in plants, undigested residues in faeces become available for the decomposers and the detritivores. Detritus food chains are located mainly in the soil or in the segments of aquatic ecosystems. They form an essential component of natural ecosystems and are necessary for self-sustenance and for maintaining ecological balance. Detritus food chains can be of great practical value for modern man for sewage treatment and control of water pollution. Most of the natural ecosystems possess both grazing and detritus types of food chains. Their relative importance however, varies from one ecosystem to another. In terrestrial and shallow water ecosystems, detritus food chains dominate because a major proportion of the annual energy flow passes through this circuit. In case of tidal marshes, almost 90 per cent of the primary production is routed through the detritus food chains. In deep water aquatic systems rapid turnover of organisms and high rate of harvest are responsible for the dominance of grazing food chains.

Posted Date: 1/19/2013 1:34:52 AM | Location : United States







Related Discussions:- Detritus food chains, Assignment Help, Ask Question on Detritus food chains, Get Answer, Expert's Help, Detritus food chains Discussions

Write discussion on Detritus food chains
Your posts are moderated
Related Questions
In eukaryotes  the SER has enzymes  able to begin  double  bonds into fatty acyl CoA molecules  in an oxidation  reaction  which uses molecular  oxygen.  This reaction is catalyzed

VITAMIN - A Discovered by Macollum. Also known as Retinol / Antixeropthalmic vitamin / Auxerophthol. It is vitamin for normal vision. It forms retinal pigments rho

Q. What is Impaired Glucose Tolerance? Glucose tolerance is assessed by taking the fasting blood sugar value. An oral glucose load of 75 grams glucose is administered and blood

Which law of thermodynamics explains the fact that we must eat to gain the energy to perform the functions of life, such as breathing? a. fourth law b. first law c. second law d

Define Calamity and Emergency Management - nutritional needs of humans? During past many years, we have seen, as well as, realized -that natural calamities strikes countries, b

Q. How different are the concepts of action potential, resting potential and excitation threshold concerning neurons? Action potential is the maximum positive voltage level ach

Conventional Endodontic Treatment Surgical Endodontic & Retrograde sealing of Immature root Apex: After cleaning and shaping of the RC and before filling , I make a surgical

What is heterophagic intracellular digestion? How is this process accomplished? Heterophagic intracellular digestion is the breaking into minor substances of external substance

Q. Which are the target tissues and target organs of the neurohypophysis? The target organs of oxytocin are the mammary glands and the uterus and target organs of ADH are the k

Compared to platyhelminthes which physiological problem have the cylindrical body of nematodes brought? How was that problem solved? The cylindrical shape of nematodes made imp