: A peep into ecology and environment #IndiaNEWS #Education Hyderabad: Eco system – Elementary Aspects An ecosystem consists of both structural & functional components. The ecosystem components
A peep into ecology and environment #IndiaNEWS #Education
Hyderabad:
Eco system – Elementary Aspects
An ecosystem consists of both structural & functional components. The ecosystem components of ecosystem are of two types Abiotic factors and Biotic factors. Abiotic factors are again of two types Physical factors and Chemical factors. The physical factors are lights, temperature, soil, pressure etc. The chemical factors are oxygen, carbon dioxide, various mineral nutrients in the soil/water, etc.
These physical and chemical factors affect the life of the organisms present in an ecosystem. Energy transfer and recycling of minerals constitute the functional aspect of an ecosystem.
Light
Since plants produce food through photosynthesis, a process which is possible only when sunlight is available as a source of energy. We can easily understand the importance of light for all living organisms, particularly the autotrophs.
Many species of small plants (herbs and shrubs) growing in forests are adopted to photosynthesis optimally under very low light conditions because they are constantly over shadowed by tall trees with well-spread branches.
Many plants are also dependent on sunlight to meet their photoperiod requirement for flowering.
For many animals light is important in that they use the diurnal and seasonal variations in the intensity and duration (photoperiod) of light, as cues (indicator-s) for timing their foraging (collection of food) reproductive and migratory activities.
The availability of light on land is closely linked with that of temperature since the sun is the source of both.
But, deep in the oceans, the environment is always dark and its inhabitants do not experience light. The spectral quality of solar radiation is also important for life. The UV component of the spectrum is harmful to many organisms. All the colour components of the visible spectrum are not available for marine plants, living at different depths of the seas.
Biological effects of light: Light is an ecological factor that shows its influence on many biological phenomena and activates like pigmentation, movement, vision, metabolism, etc.
Effect of light on pigmentation:
Light influences the colour of the skin
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