By controlling pest on the farms
Sharks play a very important role in the oceans in a way that an average fish does not. Sharks are at the top of the food chain in virtually every part of every ocean. In that role, they keep populations of other fish healthy and in proper proportion for their ecosystem. The air sacs permit a unidirectional flow of air through the lungs. Unidirectional flow means that air moving through bird lungs is largely 'fresh' air & has a higher oxygen content. In contrast, air flow is 'bidirectional' in mammals, moving back and forth into and out of Wetlands provide habitat for birds, which can play an important role in helping to control pests on nearby farms. Flocks of white ibis (Threskiornis molucca) and straw-necked ibis (Threskiornis spinicollis) frequently forage for grasshoppers and other leaf-eating insects in crops such as lucerne. The avian respiratory system is different from that of other vertebrates, with birds having relatively small lungs plus nine air sacs that play an important role in respiration (but are not directly involved in the exchange of gases). Bees and insects are the most common pollinators, but bats and birds are known to do their share in this vital activity. The agent moving the pollen, whether it is moths, bees, bats, wind or birds, is called the “pollinator” and the plant providing the pollen is called the “pollenizer”. Save. Birds are grouped by biologists into what's called a class---the class aves---on a level with other such classes as mammals and reptiles. Birds function as an integral and highly significant component of ecosystems worldwide, from the polar regions to the tropics. Red-tailed hawks play an important role in local ecosystems by helping to control the populations of small mammals, including rodents and rabbits. They also provide habitat for some small bird species, including house sparrows, that live in active red-tailed hawk nests. Some smaller bird species mob hawks. Some animals eat birds, if there were no birds there would be none of that animal, for instance foxes eat chickens, no chickens means that the fox population would drop than the coyote that eats the fox population would drop, and so on and so on, than sooner or later we would lose allot of animal species. When this is carried out by birds, the term used is Ornithophily. Hummingbirds, spiderhunters, sunbirds, honeycreepers and honeyeaters are the most common pollinator bird species. Plants that make use of pollination by birds commonly have bright red, orange or yellow flowers and very little scent.
http://www.sharksavers.org/en/education/the-value-of-sharks/sharks-role-in-the-ocean/ http://people.eku.edu/ritchisong/birdrespiration.html http://www.environment.nsw.gov.au/wetlands/WhyAreWetlandsImportant.htm http://people.eku.edu/ritchisong/birdrespiration.html http://www.birds.com/blog/the-important-role-of-birds-in-pollination/ http://www.ehow.com/facts_5452359_role-birds-maintaining-ecosystems.html http://www.biokids.umich.edu/critters/Buteo_jamaicensis/ http://www.answers.com/Q/What_role_do_birds_play_in_the_balance_of_nature http://www.birds.com/blog/the-important-role-of-birds-in-pollination/
how do birds play an important role in the community