Acquire Quote by Ernst Mayr

A species is a reproductive community of populations reproductively isolated from others that occupies a specific niche in nature.

— Ernst Mayr

A species consists of a group of populations which replace each other geographically or ecologically and of which the neighboring ones integrate or hybridise…

— Ernst Mayr

Isolating mechanisms are biological properties of individuals that prevent the interbreeding of populations that are actually or potentially sympatric.

— Ernst Mayr

I had found again and again that the most aberrant population of a species - often having reached species rank, and occasionally classified even…

— Ernst Mayr

The fundamental problem in the origin of species is not the origin of differences in appearance, since these arise at the level of the…

— David Lack

“competitive exclusion (n) 1. a situation in which one species competes another into extinction.”

— Chuck Wendig

Isolation breeds conceit.

— Charles Dudley Warner

“There are species that retain their characteristics even in conditions that are relatively different from their natural ones; other species in similar circumstances instead…

— Julius Evola

Speciation does not necessarily promote evolutionary change; rather, speciation 'gathers in' and guards evolutionary change by locking and stabilization for sufficient geological time within…

— Stephen Jay Gould

If a species is diverse, it can survive and prosper. If a species is homogeneous, it is vulnerable.

— Richard Koch

Animals engage in a struggle for existence; for resources, to avoid being eaten and to breed. Environmental factors influence organisms to develop new characteristics…

— Al-Jahiz

All the acquisitions or losses wrought by nature on individuals, through the influence of the environment in which their race has long been placed,…

— Jean-Baptiste Lamarck