Ecosystem

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The slide tries to cover the concept of ecosystem and the concept of homeostasis through which it maintains the state of equilibrium.

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Ecosystem

  1. 1. Ecosystem And the study of homeostasis mechanism.
  2. 2. Concept of Ecosystem: Eco+System  Eco means a habitat.  System means a complex set of interconnected components or processes forming a whole. As defined in Philip’s Encyclopedia 2005: It includes all organic life in a given area along with the soil, water and other inorganic components of their habitat, and all the ecological interactions that takes place within and between the organic and inorganic.
  3. 3. Ecosystem:Sun
  4. 4. Components of an Ecosystem. Abiotic Components • Geographical • Climatic • Physicochemical characteristics Biotic Components • Plants • Animals & Birds • Microbes
  5. 5. Ecological Pyramids: Graphical representation of trophic structure and function of an ecosystem is known as ecological pyramid. EcologicalPyramids Pyramid of Number Pyramid of Biomass Pyramid of Energy
  6. 6. Pyramid of number: Frog Grasshopper Grass Parasites Herbivore Bird Tree Snakes Birds Tree
  7. 7. Pyramid of Biomass: Lion Deer Trees, grasses Kingfisher Big fishes Small Fishes Phytoplankton
  8. 8. Pyramid of Energy: Omnivore Carnivore (Fox) Herbivores (Rabbit) Trees, Herbs and Shrubs Sun
  9. 9. The functioning of the system: System outputInput Feedback
  10. 10. Deficiency Negative Feedback Set Point Positive Feedback Death/Collapse Adjustment to the set point. Tendency to take away from the set point. Homeostasis Mechanism:
  11. 11. Negative Feedback: Predation can be seen as a homeostatic process of communities. Predator/prey relationships have an odd element of cooperation in them. Predators tend to kill the weakest members of the prey population, which include animals who are ill, old, or very young. Positive Feedback: Human interference leading to the removal of a population control from the community. Example- When all the predators of the deer are removed from a community the number of deer's can explode. Negative feedback: Lemmings are small rodents that live near and in the Tundra north of the conifer forests of North America, Europe and Asia. When their population cycle peaks and food runs out, they sometimes do migrate, but more commonly their crowding-induced thyroid diseases kills them suddenly.
  12. 12. Conclusion: Ecosystem one of the major governing entity of the environment, though tends to stabilize the deficiency and disequilibrium, but with the increasing penetration and manipulation of human activities, the ecosystem are turning out to be fragile in nature . The fragile nature somehow or the other will have an influence on the human beings. The time has come for us to:

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