What are dominant species?

Answer 1

Biomass is a measurement of dominance in an ecosystem.

A dominant species is a species that has a community impact that is proportional to its biomass. For example an elephant is a dominant species because it has a large biomass and a large impact on its community, by converting dense woodlands to grasslands that burns more readily and allows for necessary disturbance.

The higher a species are up on the food chain, the more dominant they are, as they have an impact on the species lower in the food chain.

Answer 2

There are two types of alleles, dominant and recessive. Dominant alleles tend to overpower recessive ones. On a punnett square, a capital letter will indicate a dominant allele and a lowercase letter will indicate a recessive allele. An organism with two lowercase alleles is recessive, while an organism with either two capital alleles or one capital and one lowercase allele is dominant.