Lakes - lentic ecosystems, Biology

Assignment Help:

Lakes - Lentic Ecosystems

Most lakes occur in regions which have recently been subjected to geological changes; say within the past 20,000 years. However, a few lakes, such as Lake Baikal in Russia and Lake Tanganyanitia in Africa are ancient and are estimated to have originated twenty million years ago. Lakes arise in several ways. Some, like the tectonic lakes, are formed in basins created by geological activities such as warping and faulting of the earth's crust. Most of the Himalayan lakes are tectonic in origin.

Some are formed in crater depressions of extinct volcanoes and are called crater lakes, for example lake Konsar nag in Kashmir. Others may be a result of glacial activity. For example most lakes of North America originated due to glacial erosions and deposition, whereby glacial abrasions of slopes in high mountain engraved basin which later became filled with melting snow and rain. Still others have been formed by deposition of silt, drift-wood and other debris in beds of slow moving streams. Lakes may also arise by landslides blocking off streams and valley.


Related Discussions:- Lakes - lentic ecosystems

Venous return, This is the amount of blood that is returned to the heart by...

This is the amount of blood that is returned to the heart by the veins. This is influenced by various factors. Inspiration decreases the pressure in the  central veins and thus inc

Hetero trophic mode of nutrition, what is heterotroophic mode of nutrition?...

what is heterotroophic mode of nutrition?give some information about heterotrophic mode of nutrition?

Study of phylems, iwant to know all about phylem protozoa?

iwant to know all about phylem protozoa?

Does ph affect the enzyme activity, Does pH affect the enzyme activity? ...

Does pH affect the enzyme activity? The concentration of hydrogen ions in solution affects the enzyme activity. Every enzyme has maximal efficiency under an optimum pH. As p

Illustrate the thin and think filaments in the muscle fiber, Illustrate the...

Illustrate the thin and think filaments in the muscle fiber A healthy skeletal muscle fiber is isolated and has no external forces on it.  It has normal intracellular levels of

How much sds need for 50 ml, How much SDS do you need for 50 ml of a 20% SD...

How much SDS do you need for 50 ml of a 20% SDS solution in water(weight/ volume)? SDS is a solid.

Explain in brief about the cell membrane, Explain in brief about the Cell M...

Explain in brief about the Cell Membrane All cells, whether prokaryotic or eukaryotic, are bound by a limiting membrane called the cell membrane or the plasma membrane. The ce

State about endocrine system, Endocrine System In endocrine system duct...

Endocrine System In endocrine system ductless gland or specialized cells release chemicals called hormones into the circulating blood. These hormones influence the functions of

What do you mean by nervous system, Q. What do you mean by Nervous System? ...

Q. What do you mean by Nervous System? Structural Organization:   CNS + PNS Functional Organization:   only concerned with PNS Sensory (Afferent) ->  CNS Motor (Effe

Explain bidirectional glenn shunt under cardiopulmonary, Explain Bidirectio...

Explain Bidirectional Glenn Shunt under cardiopulmonary Bypass ? The ascending aorta and SVC at innominate jugular vein junction and IVC are cannulated and child connected to c

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