ORGANISMS AND POPULATIONS
In nature, organisms rarely exist in isolation; they typically live in groups within a defined geographical area, sharing or competing for resources and potentially interbreeding. This group of individuals of the same species in a specific area constitutes a population. Populations are essential units of study in ecology because they link ecological interactions to population genetics and evolutionary processes.
i.Population Size: Refers to the total number of individuals in a population. It indicates the overall strength of a population in a specific area.
ii.Population Density: The number of individuals per unit area or volume. It gives an idea of how crowded the population is and can provide insights into the health and dynamics of the population. High density might indicate abundant resources, while low density could suggest scarcity or high predation rates.
i.Clumped Dispersion: Individuals are grouped in patches, often around resources. This pattern is common in species that live in social groups or have limited dispersal abilities. For example, elephants gathering around a waterhole.