Jawaharlal Nehru Technological University Hyderabad B.Tech II ENVIRONMENTAL STUDIES Previous Question Paper (August/September - 2022 - R13)

The functions of an ecosystem are the processes that maintain the stability and productivity of the environment. The primary functions include:

1. Energy Flow: Energy enters the ecosystem through solar radiation, which is captured by producers (plants) via photosynthesis and converted into chemical energy. This energy flows through trophic levels from producers to consumers and decomposers, following the laws of thermodynamics.
2. Nutrient Cycling: Ecosystems recycle essential elements such as carbon, nitrogen, phosphorus, and water. These nutrients move from the abiotic environment into biotic organisms and back to the environment through decomposition and mineralization.
3. Primary Production: This refers to the rate at which producers synthesize organic matter using sunlight, providing the foundational energy source for all other trophic levels.
4. Ecological Regulation: Ecosystems regulate environmental conditions through processes like climate control, water purification, and soil formation, which are essential for maintaining life-supporting systems.

An ecological pyramid represents the relationship between different trophic levels in an ecosystem. The flow diagram structure is as follows:

The pyramid shape indicates that energy, biomass, or the number of organisms typically decreases as one moves from the base (producers) to the apex (top consumers), reflecting the loss of energy at each transfer level.