Ecosystem

What role is played by Elephants in Ecosystem?

May 20, 2016

Elephants are the gardeners of our forests. An elephant eats abundant amounts of fruit. Some seeds may be defecated intact in a different area located at a distance. From this excreta, a new plant may sprout if conditions are right. In this way the elephants help in...

Various Ecological Units: Species, Population, Community, Ecosystem, Biome, Ecosphere, Biosphere

January 11, 2016

There are several types of inter-related ecological units such as species, population, community, ecosystem, biome, ecosphere, biosphere etc. Many of these concepts suffer from inconsistencies and confusions over terminology. Organisms and Populations Theoretically, an organism should be smallest ecological unit. However, since all organisms have finite life...

Functions of Biodiversity

January 4, 2016

Humans cannot exist without biodiversity as we use it directly and indirectly in a number of ways. Direct use includes things like food, fibres, medicines and biological control, whilst indirect uses includes ecosystem services such as atmospheric regulation, nutrient cycling and pollination. There are also non-use values...

Biomass Productivity

June 27, 2015

The rate of generation of biomass in an ecosystem is called Productivity, which is expressed in units of mass per unit surface (or volume) per unit time. Productivity of autotrophs such as plants is called primary productivity, while that of heterotrophs such as animals is called secondary...

Niche, Food Chains and Foodweb

June 27, 2015

Each organism has its own niche—its position or function in a community. Because every species occupies a niche, it’s going to have an effect on all the other organisms. These connections are shown in the food chain. A food chain describes the way different organisms depend on...

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