Insects as bioindicators

Industrial revolution, intensive agriculture and growing human population are causing extensive exploitation of natural ecosystem which leads to advanced destruction process of land ecosystem. As ecosystem more complex and their biological communities, it is not easy to directly assess the health of natural environments. Therefore, the use particular taxa e.g. insects, bats, frogs, fish, nematodes etc. that show measurable responses to these changes.  Responses of some species like insects, bats, frogs, fishes, plants etc. to disturbances can be used as a parameter of analysis about levels of change in the environment. Bioindicators are the species or species group that reflects the abiotic or biotic state of an environment, represents the impact of environmental change on a habitat, community, or ecosystems, or indicates the diversity of other species (McGeoch, 1998).