● The size of the population tells us a lot about its status in the habitat.
● Whatever `color{violet}("ecological processes")` we wish to investigate in a `color{violet}("population,")` be it the outcome of competition with another species, the impact of a `color{violet}("predator ")`or the effect of a `color{violet}("pesticide application,")` we always evaluate them in terms of any change in the `color{violet}("population size.")`
● The size, in nature, could be as low as <10 (`color{violet}("Siberian cranes at Bharatpur wetlands in any year")`) or go into millions (`color{violet}("Chlamydomonas in a pond")`).
● Population size, more technically called `color{violet}("population density (designated as N)")`, need not necessarily be measured in numbers only.
● Although total number is generally the most appropriate measure of `color{violet}("population density")`, it is in some cases either `color{violet}("meaningless or difficult")` to determine.
● In an area, if there are `color{violet}("200 Parthenium plants")` but only a single huge banyan tree with a large canopy, stating that the `color{violet}("population density")` of banyan is low relative to that of `color{violet}("Parthenium")` amounts to underestimating the enormous role of the Banyan in that community.
● In such cases, the percent cover or `color{violet}("biomass")` is a more meaningful measure of the `color{violet}("population size.")`
● Total number is again not an easily adoptable measure if the `color{violet}("population")` is huge and counting is impossible or very time-consuming.
● Sometimes, for certain `color{violet}("ecological investigations"0`, there is no need to know the `color{violet}("absolute population densities")`; relative densities serve the purpose equally well.
● For instance, the number of fish caught per trap is good enough measure of its `color{violet}("total population density")` in the lake.
● We are mostly obliged to estimate `color{violet}("population sizes indirectly")`, without actually counting them or seeing them.
● The `color{violet}("tiger census")` in our national parks and tiger reserves is often based on`color{violet}(" pug marks")` and `color{violet}("fecal pellets.")`
● The size of the population tells us a lot about its status in the habitat.
● Whatever `color{violet}("ecological processes")` we wish to investigate in a `color{violet}("population,")` be it the outcome of competition with another species, the impact of a `color{violet}("predator ")`or the effect of a `color{violet}("pesticide application,")` we always evaluate them in terms of any change in the `color{violet}("population size.")`
● The size, in nature, could be as low as <10 (`color{violet}("Siberian cranes at Bharatpur wetlands in any year")`) or go into millions (`color{violet}("Chlamydomonas in a pond")`).
● Population size, more technically called `color{violet}("population density (designated as N)")`, need not necessarily be measured in numbers only.
● Although total number is generally the most appropriate measure of `color{violet}("population density")`, it is in some cases either `color{violet}("meaningless or difficult")` to determine.
● In an area, if there are `color{violet}("200 Parthenium plants")` but only a single huge banyan tree with a large canopy, stating that the `color{violet}("population density")` of banyan is low relative to that of `color{violet}("Parthenium")` amounts to underestimating the enormous role of the Banyan in that community.
● In such cases, the percent cover or `color{violet}("biomass")` is a more meaningful measure of the `color{violet}("population size.")`
● Total number is again not an easily adoptable measure if the `color{violet}("population")` is huge and counting is impossible or very time-consuming.
● Sometimes, for certain `color{violet}("ecological investigations"0`, there is no need to know the `color{violet}("absolute population densities")`; relative densities serve the purpose equally well.
● For instance, the number of fish caught per trap is good enough measure of its `color{violet}("total population density")` in the lake.
● We are mostly obliged to estimate `color{violet}("population sizes indirectly")`, without actually counting them or seeing them.
● The `color{violet}("tiger census")` in our national parks and tiger reserves is often based on`color{violet}(" pug marks")` and `color{violet}("fecal pellets.")`