living organisms

Biodiversity-Definition, types, importance, hotspots, threats and conservation

Biodiversity-Definition, types, importance, hotspots, threats and conservation The term biodiversity was coined as a contraction of biological diversity by E.O. Wilson in 1985. Biodiversity may be defined as the variety and variability of living organisms and the ecological complexes in which they exist. In other words, biodiversity is the occurrence of different types of ecosystems, different species of organisms with the whole range of their variants and genes adapted to different climates, environments along with their interactions and processes. Types of biodiversity There are three interrelated hierarchical levels of biodiversity namely, genetic diversity, species diversity and community or ecosystem diversity. ... Read more

Biodiversity: concept, hotspots, threats to biodiversity

Biodiversity is defined as the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are a part; this includes diversity within species, between species, and of ecosystems. Basically biodiversity is the total number of genes, species and ecosystems of a region. It includes (i) genetic diversity, (ii) species diversity and (iii) ecosystem diversity. Plants and animals constitute only a small component of biodiversity. A biodiversity hotspot is a region with a high level of endemic species. Endemic species are those species that are found  in a certain limited ... Read more

Concept of Ecosystem, Structure and Function of Ecosystem

Eco-System-An ecosystem is defined as a structural and functional unit of biosphere consisting of community of living beings and the physical environment, both interacting and exchanging materials between them. It includes plants, trees, animals, fish, birds, micro-organisms, water, soil, and  people. When an ecosystem is healthy (i.e. sustainable) it means that all the elements live in balance and are  capable of reproducing themselves   Components of Ecosystem 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 ... Read more