Population Ecology – Definition & Key Points
TERMS | DEFINITIONS |
Population | The number of individuals of specie living in the same area at the same time is called population. |
Monospecific | Population of only one specie living in the same area then it is called Monospecifie. |
Mixed or Polyspecific | Populations of different species living in the same area are called Polyspecific. |
Population density | The number of individuals living in a unit area is called density. |
Mortality | The rate at which the individuals are lost by death in a unit time is called mortality. |
Dispersion | It is the random pattern of distribution of individual of a population over space |
Population growth |
The number of individuals of population or biomass increased in unit time is call population growth. |
Seed bank | The storage of seed in the soil is called seed bank. |
Demography | The study of the vital statistics that affect population size is called demography. |
Age structure | The relative number of individuals of each age in population is called age structure. |
Generation time | The average span between the birth of individuals and the birth of their offspring is Called generation time. |
Sex ratio | The proportion of the individual of each sex in a population is called sex ratio. |
Life tables | The tables showing mortality summaries of a population is called life table. |
Cohort | Cohort is a group of individuals of same age from birth till their death. |
Survivorship curve | A plot of the numbers of cohort alive at each age group is called survivorship curve. |
Clutch | The number of offspring or seeds produced at each
reproductive cycle by a plant is called clutch size. |
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