Tag: ecology
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Microscopic Slides
Cell Division
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Soil as Ecological Factor
Introduction Soil consists of weathered layer of Earth’s crust with products of decay of living organisms intermingled. In soil, thus, abiotic & biotic components are intimate. Soil is considered to be chief organizing centre for land ecosystems. Pedosphere: Outermost layer of earth that is composed of soil & subject to its formation. Pedogenesis: Process of…
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Ecological Factor: Light
Introduction Light is a significant ecological factor. Quality (wavelength or colour), duration (length of day) and intensity (energy input or actual intensity measured in gram calories) of light all influence plants and animals in various ways. Both animals and plants respond to different wavelengths of light. Colour vision occurs in majority of animals including arthropods,…
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Ecological Pyramids
Introduction Ecological Pyramids are graphical representation of structure & function of ecosystem at trophic levels. First described by Charles Elton, hence, also called Elton Pyramids. Show relative amounts of parameters like number, energy, biomass etc. across trophic levels. First trophic level/Producer forms the base. Successive trophic levels are represented by tiers above the base. 1)…
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Productivity, Energy Flow & Efficiency – Ecosystem
(Productivity = rate of production) There are two types of productivity: Commonly used productivity unit: Primary Productivity: Producer organisms, including both photosynthetic & chemosynthetic, convert radiant energy to organic substances and the rate at which they convert is termed primary productivity i.e. Rate of conversion of radiant energy to organic substances by producers is termed…
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Major Ecosystems of the World
Overview Types of Ecosystem Artificial categorization of ecosystem can be done as following of the giant ecosystem – the Ecosphere. A) Natural Ecosystems: Self- operated under natural conditions. Natural ecosystems can be further classified as… Terrestrial- for example: Forest, Grassland, Desert, Natural Geysers etc. Aquatic- Further classified as freshwater & marine… Freshwater- Lotic (Running water):…
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Ecology: Definition, Subdivision & Scope of Ecology
The word ecology is derived from Greek language… So for an idea of Ecology, it can be said that it is study of the environmental house including all the organisms living in it & all the functional processes occurring inside it. That means we can say that ecology is basically concerned with study of relationship…
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Ecosystem Structure
On the basis of trophic structure, ecosystem is two layered: “trophe = nourishment” Autotrophic Stratum (Green Belt): Upper, self-nourishing layer of chlorophyll-containing plants. Fix the light energy, convert inorganic substances into complex organic compounds which predominate in the stratum. The most intensive autotrophic metabolism occurs in this layer where light energy is available. Heterotrophic Stratum…