Population characteristics

I need to determine why good indicator organisms are present in low numbers - <1% of the total population. I've tried researching, but most websites discuss why indicator organisms should be present in high concentrations (relative to pathogenic bacteria). Why do they ...

See entire post

... the chance of survival and reproduction) to become more common in a population and causes harmful traits to become more rare” (Ref: Futuyma, ... A process in nature in which organisms possessing certain genotypic characteristics that make them better adjusted to an environment tend to ...

See entire post

... any difference between life or death? Even if it did in one instance, statistically how could it be significant enough to make a difference on the population level? Maybe I'm being a bit myopic....I still think there is something here, though. I will try and think of some more examples. In the ...

See entire post

... it come from? If a description, what is the definition and how do these characteristics derive from it? If it is meant to be a definition, why not ... Speciation requires a) differential selection on different parts of the population, b) very low gene flow between those two parts of the population, ...

See entire post

... through slow and lengthy genetic alterations of multiple camouflage characteristics in a constantly changing system with numerous degrees of ... the bug is so well adapted no longer grows very well, and the tree's population begins to decline. This will have consequences for the bug population. ...

See entire post