List any three ways of measuring population density of a habitat.

Question

a. List any three ways of measuring population density of a habitat. 

b. Mention the essential information that can be obtained by studying the population density of an organism.

Answer 1

a. By physical counting, percent cover or total biomass, from relative density, counting pug marks, counting faecal pellets.

b. Status of habitat, whether competition for survival exists or not, whether population is increasing or declining, natality, mortality, emigration, immigration.