The following points highlight the two main types of population growth curves. The types are: 1. J - Shaped Curve 2. S - Shaped or Sigmoid Curve. Type # 1. J - Shaped Curve: In the case of J-shaped growth form, the population grows exponentially, and after attaining the peak value, the population may abruptly crash. This increase in population [...]
The following points highlight the seven main factors affecting population of living organisms. The factors are: 1. Natality 2. Mortality 3. Dispersal 4. Age Distribution 5. Biotic Potential and Environmental Resistance 6. Biotic and Abiotic Factors 7. Density Dependent and Density Independent. Factor # 1. Natality: The increase in number of individuals in a population under given environmental conditions is [...]
It includes an analysis of population dispersion and various types of interactions. 1. Population Dispersal: Movement of individuals into and out of the population is called population dispersal. It plays important role in the geographical distribution of organisms even to the areas previously unoccupied by the members of population. Dispersal of organisms occurs for various reasons such as food, protection, [...]