Notes and Study material for Exams
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
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”, … Read more
Fisheries. Education and awareness. Education and awareness are essential for conserving biodiversity. People need to understand the importance of biodiversity and the threats it faces in order to take action to protect it. Policy and regulation. Policy and regulation can also play a role in conserving biodiversity. Governments can pass laws that protect biodiversity and … Read more
What is Desertification? Desertification is the degradation of land in arid, semi-arid, and dry sub-humid areas. It is caused by human activities and Climate Change. Desertification can lead to a loss of BiodiversityBiodiversity, a decline in agricultural productivity, and an increase in poverty. Causes of Desertification Overgrazing Deforestation Irrigation Climate change Effects of Desertification Loss … Read more
Agro-ECOLOGY and its relevance to man The term Agroecology can be used in multiple ways, as a science, as a movement and as a practice. Broadly stated, it is the study of the role of agriculture in the world. Agroecology provides an interdisciplinary framework with which to study the activity of agriculture. In this framework, … 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
located where river meets the sea. the most productive water bodies in the world The complete salinity range from 0-35 ppt is seen from the head (river end) to the mouth (sea end) of an estuary Coastal lakes which have their connection with the sea through small openings are better known as lagoons or … Read more
Measuring Biodiversity: A Multifaceted Approach to Understanding Life on Earth Biodiversity, the intricate web of life on Earth, is a complex and multifaceted concept. It encompasses the vast array of living organisms, their genetic diversity, and the ecosystems they inhabit. Understanding and quantifying this diversity is crucial for conservation efforts, sustainable development, and the well-being … Read more
Mahatma Gandhi’s principle of “enoughness” in his saying “the earth provides enough to satisfy every persons need but not for every person’s greed” According to World Commission on Environment and Development, Our Common Future (1987) , Sustainable Development is development that meets the needs of the present without compromising the ability of future generations to … Read more
Distribution of natural Resources World Distribution of forest reserves Forests cover 31 percent of the world’s land surface, just over 4 billion hectares. (One hectare = 2.47 acres.) This is down from the pre-industrial area of 5.9 billion hectares. According to data from the U.N. Food and agriculture Organization, deforestation was at its highest rate … Read more