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

Define the role of addition of acetyl groups to histones, Creb binding prot...

Creb binding protein (CBP) is a histone acetyl transferase (HAT) protein. What role does the  addition of acetyl groups to histones play during development? A. The addition of

Explain about platyhelminth phylum, What are the best known representatives...

What are the best known representatives of the platyhelminth phylum? The most popular representatives of the platyhelminthes are worms that cause human diseases, like taenia an

What is natural selection, What is natural selection? Natural selection...

What is natural selection? Natural selection is the method by which organisms that have certain favorable traits are better capable to survive and make successfully than organi

Synthesis of soluble proteins on the surface of lens, How is synthesis of s...

How is synthesis of soluble proteins taking equatorial part on the surface of lens? Synthesis of soluble proteins taking equatorial part on the surface of lens as follows: 1

The Endocrine system, What are the two models that explain Mechanism of Hor...

What are the two models that explain Mechanism of Hormone Action on their target?

Define limitations for standard or total plate counts method, Define Limita...

Define Limitations for Standard or Total Plate Counts Method? This method has certain limitations - 1. Microbial count depends on the type of media, incubation temperature,

What is food pyramid, Food Pyramid The diabetes food pyramid divides fo...

Food Pyramid The diabetes food pyramid divides food into six groups. These groups vary with each other on the basis of size occupied in the pyramid. The largest i.e. grains, br

Explain the regulation of blood pressure, Explain the Regulation of blood p...

Explain the Regulation of blood pressure? The renin-angiotensin system regulates the blood pressure. The synthesis of renin is decreased by calcitriol through its interaction

The fragility of erythrocytes, The fragility of erythrocytes The fragil...

The fragility of erythrocytes The fragility of erythrocytes is impaired in the absence of NADPH generation due to the deficiency of glucose-6-phosphate dehydrogenase thereby ca

Explain lopinavir and its adverse effects, Explain Lopinavir/ritonavir  ...

Explain Lopinavir/ritonavir  Lopinavir is available in the US only in a fixed-dose combination with ritonavir . In treatment-naïve patients a regimen with lopinavir/ritonavir w

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