The rate of biomass production or the amount of food energy produced or obtained or stored by a particular trophic level per unit area in a unit time is called productivity. It can also be defined as the energy accumulated in plants by photosynthesis. The unit of productivity is gm/m2/year or kcal/m2/year. According to Odum there are three types of [...]
There is 78% nitrogen in atmosphere. But this cannot be taken in by the organisms. It needs to be fixed as nitrates and then utilised. This cycle is divided into four phases - nitrogen fixation, ammonification, nitrification, and denitrification (Fig. 12). Phase # 1. Nitrogen Fixation: Fixation of nitrogen takes place by atmospheric and biological agents. Other than this it [...]
In this article we will about the importance of sunlight in an ecosystem. Sunlight is a major part of abiotic conditions in an ecosystem. The sun is the primary source of energy on our planet. Above infrared in frequency comes visible light. The Sun emits its peak power in the visible region, although integrating the entire emission power spectrum through [...]