Environment

  Cold desert of India include areas of ladak, leh and kargil of kashmir and spiti valley of Himachal  Pradesh and some parts of northern Uttaranchal and Sikkim. Lies in rain shadow of Himalaya Oak, pine, deodar, birch and rhododendron are the important trees and bushes found there. Major  animal include yaks, dwarf cows, and … Read more Cold Desert/ Temperate Desert

Deserts are formed in regions with less than 25 cm of annual rainfall, .or sometimes in hot regions where there is more rainfall, but unevenly distributed in the annual cycle. Lack’ of rain in the mid latitude is often due to stable high pressure zones; deserts in temperate regions often lie in “rain shadows”, that … Read more Hot DESERT ECOSYSTEM  

  found where rainfall is about 25-75 cm per year, not enough to support a forest, but more than that of a true desert. vegetation formations that are generally found in temperate climates. In India, they are found mainly in the high Himalayas. The rest of India’s grasslands are mainly composed of steppes and savannas. … Read more GRASSLAND ECOSYTEM

  Forest types in India are classified by Champion and Seth into sixteen types.   Tropical Wet evergreen forests are found along the Western Ghats, the Nicobar and Andaman Islands and all  along the north-eastern region. It is characterized by tall, straight evergreen trees. The trees in this forest form a tier pattern: Beautiful fern … Read more INDIAN FOREST TYPES

Forest ecosystem includes a complex assemblage of different kinds of biotic communities. Optimum conditions such as temperature and ground moisture are responsible for the establishment of forest communities. Forests may be evergreen or deciduous which are distinguished on the basis of leaf into broad-leafed or needle leafed coniferous forests in the case of temperate areas. … Read more FOREST ECOSYSTEM

  a universal process of directional change in vegetation, on an ecological time scale. occurs when a series of communities replace one another due to large scale destruction either natural or manmade. continously -one community replacing another community, until a stable, mature community develops. The first plant to colonise an area is called the pioneer … Read more SUCCESSION

The elements or mineral nutrients are always in circulation moving from non-living to living and then back to the non-living components of the ecosystem in a more or less circular fashion. This circular fashion is known as biogeochemical cycling (bio for living; geo for atmosphere). Nutrient Cycling: The nutrient cycle is a concept that describes … Read more  BIOGEOCHEMICAL CYCLE

  The interaction between the organisms is fundamental for its survival and functioning of ecosystem as a whole. Type of Biotic Interaction Mutualism: both species benefit. Example: in pollination mutualisms, the pollinator gets food (pollen, nectar), and the plant has its pollen transferred to other flowers for cross-fertilization (reproduction).   Commensalism: one species benefits, the … Read more BIOTIC INTERACTION

  Movement of these pollutants involves two main processes:   Bioaccumulation refers to how pollutants enter a food chain. there is an increase in concentration of a pollutant from the environment to the first organism in a food chain.   Biomagnification refers to the tendency of pollutants to concentrate as they move from one trophic … Read more POLLUTANTS AND TROPHIC LEVEL

  ENERGY FLOW- Energy is the basic force responsible for all metabolic activities. The flow of energy from producer to top consumers is called energy flow  which is unidirectional. Energy flows through the trophic levels: from producers to subsequent trophic levels. There is a loss of some energy in the form of unusable heat at … Read more FUNCTIONS OF AN ECOSYSTEM