UKPCS Prelims and Mains Notes-UKPSC Test Series
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
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
Biosphere is a part of the earth where life can exist. represents a highly integrated and interacting zone comprising of atmosphere (air), hydrosphere (water) and lithosphere (land) Life in the biosphere is abundant between 200 metres (660 feet) below the surface of the ocean and about 6,000 metres (20,000 feet) above sea level. absent at … Read more
Aquatic systems are not called biomes, The major differences between the various aquatic zones are due to salinity, levels of dissolved nutrients; water temperature, depth of sunlight penetration. Fresh Water Ecosystem-Fresh water ecosystem are classified as lotic (moving water) or lentic (still or stagnant water). Marine Ecosystem- Estuaries-Coastal bays, river mouths and … Read more
Biome The terrestrial part of the biosphere is divisible into enormous regions called biomes, which are characterized, by climate, vegetation, animal life and general soil type. No two biomes are alike. The most important climatic factors are temperature and precipitation. Tundra- Northern most region adjoining the ice bound poles. Devoid of trees except stunted shrubs … Read more
Niche:- a description of all the biological, physical and chemical factors that a species needs to survive, stay healthy and reproduce. No two species have exact identical niches. Niche plays an important role in conservation of organisms. Types of Niche Habitat niche – where it lives Food niche – what is eats or decomposes … Read more
Natural Ecosystem- Terrestrial- Forests, Grasslands, Deserts Aquatic- Fresh Waters, Saline Waters, Marine Waters Ecotone :- a zone of junction between two or more diverse ecosystems. For e.g. the mangrove forests represent an ecotone between marine and terrestrial ecosystem. Characteristics of Ecotone It may be very narrow or quite wide. It has the conditions intermediate … Read more
The components of the ecosystem is categorised into abiotic of non-living and biotic of living components. Both the components of ecosystem and environment are same. Abiotic Components the inorganic and non-living parts of the world. consists of soil, water, air, and light energy etc. involves a ,large number of chemicals like oxygen, nitrogen-, … Read more
Ecology is defined “as a scientific study of the relationship of the living organisms with each other and with their environment.” The classical texts of the Vedic period such as the Vedas, the Samhitas, the Brahmanas and the Aranyakas-Upanishads contain many references to ecological concepts .The Indian treatise on medicine, the Caraka- Samhita … Read more
The continental drift theory is the theory that once all the continents were joined in a super-continent, which scientists call Pangaea. Over a vast period of time, the continents drifted apart to their current locations. Alfred Wegener first supported continental drift. Wegener’s explanation of continental drift in 1912 was that drifting occurred because of … Read more