Quiz 3: Ecosystems What Are They and How Do They Work

Environmental Science

The rate of degradation of the tropical rain forest is increasing which imposes dangerous affects on the humans and earth. Some of the degradation affects are discussed below: i. Degradation of these forest lead to the loss of habitats for the animals and plants. This will make the extinction of the animals and some other species. ii. Forest mainly involved in brings the carbon content at a lower level so that global warming can be avoided. If the forests are degraded then the carbon content in the atmosphere increase which further led to global warming. iii. Clearing the tropical forest affects the rain pattern of the area. Trees are considered for the homogenous weather pattern. In tropical rain forest the solar energy is converted to chemical energy by the producer. Species in the rain forest are mainly dependent on the flow of energy and cycle of nutrients. Loss of forest also affects the local weather which is against the principle of sustainability.

Terrestrial ecosystem consists of many organisms and it covers the environment and mass on land. The major terrestrial ecosystems are tundra, taiga, temperate forest, tropical forest, grassland and Desert. The major species are given below: Depending on the source of food the organisms are divided into some levels, these levels are termed as trophic levels. Living organisms can transfer the nutrients and energy from one trophic level to another level. This transformation can act as producers or consumers. These are also called as autotrophs. On the other hand which do not produce but only consume are called hetrotrophs for example plants, algae, grass are autotrophs and humans and other animals are hetrotrophs. Herbivores stand for the plant eaters. It means those organisms which mainly dependent on the plants for the food. These are also called as primary consumers. Giraffes, grasshopper and caterpillars are the example for primary consumers. Carnivores stand for meat eaters. Those animals which feed on the flesh of other organisms are called as carnivores, for example spiders, snake and tiger. Those consumers which feed on the flash of herbivores are called as secondary consumers. Those organisms which feed on the flesh of the other carnivores are called as tertiary consumers, for example hawks and whales. Omnivores are those organisms which feed on the plants as well as on the flesh of the animals, for example humans. Decomposers are those organisms which obtain their nutrients from other organisms and in return also produce the nutrients directly to the earth, air, and water. These nutrients can be used again by the producers. Bacteria and fungi are the common decomposers. Those organisms which feed on the body of the dead organisms or on the waste of the organisms are called as detritus feeders, for example earthworms. The ecosystem food chain is shown below: img

Calculate the per capita foot prints for the China. img Similarly calculate the other countries and tabulate the data: img