PPT2.2 Producers, consumers and decomposers.pptx

Producers and consumers in the environment

1. Lecture on Producers, Consumers and Decomposers By Ravi Gedela M.Tech IITG, (PhD IITG) Assistant professor Department of Bio-Sciences RGUKT SKLM Rajiv Gandhi University of Knowledge Technologies

2. Natural capital Natural capital: The main components of an ecosystem are energy, chemicals, and organisms. Nutrient cycling and the flow of energy—first from the sun, then through organisms, and finally into the environment as low-quality heat— link these components

3. Producers These are food suppliers to all plants and green trees which are termed as producers. For example, all green plants and trees take carbon dioxide from the atmosphere, water from the soil, and sunlight from the sun. The plants undergo a chemical reaction and it is also known as photosynthesis.

4. Conti.. During photosynthesis, plants liberate oxygen into an environment which is essential for life. The below equation explains about the photosynthesis reaction and liberation of oxygen.

5. Conti..

6. Consumers/ heterotrophs The other organisms in an ecosystem are consumers, or heterotrophs (“other-feeders”), which cannot produce the nutrients they need through photosynthesis or other processes They get their nutrients by feeding on other organisms (producers or other consumers) or their wastes and remain

7. Consumers Consumers are classified into four groups and they are: Primary consumers Secondary consumers/ Carnivores Tertiary consumers Omnivores

8. Primary consumers Primary consumers , or herbivores (plant eaters), are animals that eat mostly green plants. They depend only on plants for their food and they are called as herbivores. The examples of it are insects, flies, deer, and rabbit.

9. Secondary consumers/Carnivores  Carnivores (meat eaters) are animals that feed on the flesh of other animals. Secondary consumers that feed on the flesh of herbivores. spiders, lion, frog, lizard, fish, and snake

10. Tertiary consumers Tertiary (or higher-level) consumers that feed on the flesh of herbivores and other carnivores. Tigers, hawks, and killer whales.

11. Omnivores Omnivores such as pigs, rats, and humans eat both plants and animals.

12. Decomposers Decomposers are consumers that, in the process of obtaining their nutrients, release nutrients from the wastes or remains of plants and animals and return those nutrients to the soil, water, and air for reuse by producers. Most decomposers are bacteria and fungi. Other consumers, called detritus feeders, or detritivores, feed on the wastes or dead bodies (detritus) of other organisms. Examples are earthworms, hyenas, and vultures

13. Termites, ants and some other bacteria are called as decomposers. Animals such as frog, dog, wolf, and eagles are termed as decomposers. The decomposers not only act as scavengers to clean the dead bodies but also serves as parasites, participate to clean the ecological cycles.

14. Conti..

15. Thank you