Question asked by Filo student

ECOSYSTEM 14.7 Nutrient Cycling You have studied in Class XI that organisms need a constant supply of nutrients to grow, reproduce and regulate various body functions. The amount of nutrients, such as carbon, nitrogen, phosphorus, calcium, etc., present in the soil at any given time, is referred to as the standing state. It varies in different kinds of ecosystems and also on a seasonal basis. What is important is to appreciate that nutrients which are never lost from the ecosystems, rather they are recycled time and again indefinitely. The movement of nutrient elements through the various components of an ecosystem is called nutrient cycling. Another name of nutrient cycling is biogeochemical cycles (bio: living organism, geo: rocks, air, water). Nutrient cycles are of two types: (a) gaseous and (b) sedimentary. The Figure 14.6 Simplified model of carbon cycle in the biosphere 253 reservoir for gaseous type of nutrient cycle (e.g., nitrogen, carbon cycle) exists in the atmosphere and for the sedimentary cycle (e.g., sulphur and phosphorus cycle), the reservoir is located in Earth's crust. Environmental factors, e.g., soil, moisture, $\mathrm{pH}$, temperature, etc., regulate the rate of release of nutrients into the atmosphere. The function of the reservoir is $2022-23$ Biology to meet with the deficit which occurs due to imbalance in the rate of influx

Views: 5,215 students

Updated on: Dec 31, 2022