So it is not surprising that the earliest branches on his Y chromosome tree lead to a different set of populations than those in Dr. Wallace's mitochondrial DNA tree.
"He did not direct it in such a way that it benefited a more diverse set of populations in the city of New York, and more diverse income groups.
If this trend continues, even though many species may be saved in protected areas (such as national parks), each of them will be merely a remnant of a once geographically extensive and genetically diverse set of populations.
But with enough reproductive isolation, a reproductively cohesive set of populations will diverge as a unit, becoming increasingly unique.
The results show a wide range of conservation status among a regional set of populations in the study species.
Testing an hypothesis that a set of populations is a single species is important to conservation management.
However, in the set of populations studied can also be found some capable of average but stable growth in all experimental sites.
YHRD is structured by the assignment of each submitted population sample to a set of populations sharing a common linguistic, demographic, genetic or geographic background (metapopulations).
When a survey is conducted, the survey producer targets a particular population of inference or a particular set of populations of inference.
In recent years, interest has reverted to population ecology, sometimes in the form of metapopulation models (consisting of a set of populations with migration between them).
Models in population ecology are based on representing an ecological system as the set of populations (of the same or different species) it consists of.
