Principles & methods of taxonomy

There are four taxonomic fundamental components which simplify the process of identification up to species level.

I.Characterization

II. Identification

III. Nomenclature

IV. Classification

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r-selected species

High rate of per capita population growth

poor  competitive ability

Grows quickly 

age early, 

devoting much energy to producing  large number of progeny 

Small in size, and individuals do not live long. 

Random matting

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Grime’s triangle

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Where conditions for plant growth are less stressful, plants can evolve life history traits that fall along a continuum from competitors to ruderals.

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Without the abiotic stressors and without frequent disturbances, plants can grow rapidly for long periods of time, and this creates more competition among plants for soil nutrients and light.

Competitors also tend to grow to larger sizes and exhibit long life spans.

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Source–sink metapopulation model - A population model that builds on the basic metapopulation model and accounts for the fact that not all patches of suitable habitat are of equal quality.