They are also valued for their contribution to ecosystem services â ecosystem functions that are of direct benefit to humans through their action on soil processes. Earthworm benefits to ecosystems Earthworms are sometimes known as âecosystem engineersâ because they significantly modify the physical, chemical and biological properties of the soil profile. These modifications can influence the habitat and activities of other organisms within the soil ecosystem.
The Northern Hemisphere includes all of North America, the northern reaches of South America, about two-thirds of Africa, all of Asia excluding (parts of Indonesia) and all of Europe.he planet's four hemispheres are each shaded a dark gray. The Equator, that imaginary horizontal line at 0Âº degrees latitude at the center of the earth, divides the earth into the Northern and Southern Hemispheres.
In addition, all countries west of the Prime Meridian are in the Western Hemisphere while those east of the Prime Meridian are in the Eastern Hemisphere. Generally the Eastern Hemisphere includes most of Africa, about half of Antarctica, all of Asia and Australia/Oceania, and most of Europe. The Western Hemisphere includes about half of Antarctica and all of North and South America, which includes the Caribbean, Central America and Greenland.