Food Chains A food chain describes how energy and nutrients move through an ecosystem. It basically shows who eats what in the ecosystem. Thus, the transfer of energy from the source in plants through a series of organisms by eating and being eaten constitutes food chains. At each transfer, a large proportion of energy is… Continue reading Food chains and Food webs
The term ecological niche was developed by Charles Elton. Ecological niche may be defined as ‘the functional role and position (micro-habitat) of species in its ecosystem, including what resources it uses, how and when it uses the resources, and how it interacts with other species. The ecosystem stability depends upon the diversity of the niche.… Continue reading Ecological niche
F.E. Clement postulated the concept of Vegetation/Ecological succession which is the process of change in the species structure of an ecological community over time. The time scale can be decades (after a wildfire), or even millions of years after a mass extinction (Permian, Triassic, cretaceous). The development of vegetation community in any ecosystem or habitat… Continue reading Ecological succession
Ecosystem functions through the input of energy mainly solar radiation. L. Lindeman has formulated principles about the relationship between trophic levels within a natural ecosystem. Principle 1: As the distance between the organisms of a given trophic level and the initial source of energy (trophic level one) increases, the probability of the organisms to depend… Continue reading Principles of ecosystem function?
“Ecosystem” term was first coined by A.G. Tansely, in the year 1935. In simple terms, it is a community of living and non-living things that work together. The living and non-living things continuously exchange materials and energy between them. It forms the structural and functional unit of the biosphere (sphere of life). Ecosystem varies greatly… Continue reading What is an Ecosystem?
What is Environment? The word Environment means ‘surroundings’ (environs). Therefore, the environment of an individual, object, or system includes all of the other entities – both living (biotic) and non-living (abiotic)-with which it is surrounded. In an environment. What are the different types of environment? Primarily, the environment can be categorised into two: Natural Environment:… Continue reading What is Environment?
Nationally Determined Contributions News: NITI Aayog will virtually launch the India Component of the Nationally Determined Contributions (NDC)–Transport Initiative for Asia (TIA). Facts: NDC Transport Initiative for Asia (NDC-TIA): The initiative aims to promote a comprehensive approach to decarbonize transport in India, Vietnam, and China over the period 2020-24. Supported by: It is supported by the International… Continue reading Nationally Determined Contributions (NDC)–Transport Initiative for Asia(TIA)
News: Maharashtra is set to become the first state in the country to declare Sonneratia alba as a state mangrove tree species. Facts: Sonneratia alba or mangrove apple: It is an evergreen mangrove tree in the family Lythraceae. Distribution: It grows naturally in many tropical and subtropical areas from East Africa to the Indian subcontinent,… Continue reading Sonneratia alba to be state mangrove tree in Maharashtra
News: Global Initiative to reduce Land Degradation and Coral Reef program has been launched at G20 Environment Ministers Meet. Facts: Global Initiative to reduce Land Degradation: It aims to strengthen the implementation of existing frameworks to prevent, halt and reverse land degradation within G20 member states and globally taking into account possible implications on the… Continue reading Global Initiative to reduce Land Degradation and Coral Reef program
News: China has announced significant climate change announcements at the virtual UN General Assembly in New York. Facts: What has China announced? China would become carbon net-zero by the year 2060. Net-zero: It is a state in which a country’s emissions are compensated by absorptions and removal of greenhouse gases from the atmosphere. Absorption can… Continue reading China’s climate commitment: How is it significant?