Population Ecology

Slide 1:Population Ecology

Slide 2: Population as a Unit of Study • Population – A group of organisms of the same species occupying a particular space at a particular time • Demes – Groups of interbreeding organisms, the smallest collective unit of a plant or animal population

Slide 3: Population as a Unit of Study • Population has group and not individual characteristics • Basic characteristics of a population: – Density (no/area; no/vol) – Size (numbers) – Age Structure (based on age distribution) – Dispersion (the spread of individuals in relation to one another)

Slide 4: emigration mortality DENSITY natality Four basic population immigration parameters

Slide 5: Density: no of organisms per unit area or per unit volume Natality: the r