The phrase "a well established population" is correct and usable in written English.
It can be used when referring to a group of individuals or organisms that have successfully settled and thrived in a particular area over time.
Example: "The researchers were excited to discover a well established population of rare birds in the remote forest."
Alternatives: "a stable population" or "a thriving population".
While in developed economies the middle class is well established, populations in these countries are growing wealthier and more sophisticated and are demanding a wider array of luxuries, like cellphones and clothing.
In meeting the urgent need for longitudinal cohort studies on NCDs in Africa, well established population-based study sites are ideal, since they offer cost savings [ 21].
Likewise, F. radicans has permanent and well established populations in all its distributional range, with separate sexes and sexual reproduction taking place the same way as in F. vesiculosus.
There are also some very well established population-based mutations with clear effects on disease, from sickle cell trait protection against malaria [ 7] to CCR5, a known receptor of HIV, defective alleles in which have been associated with resistance to HIV infection [ 8].
In this study we describe prospectively ascertained sexual partners and behaviours of MSM-SW drawn from a well established key population cohort study in Coastal Kenya, and compare sexual behaviour of MSM-SW who report female partnerships with those who do not.
We evaluated health responses following brief but acute wildfire smoke exposure in a region with low background pollution and utilized County Health Rankings (CHR) [ 10], based on a well established model of population health that characterize factors which determine community health.
Despite these limitations, data for this study were derived from a well established, unique multiethnic population based stroke register, with the advantage to study trends in the process of stroke care over a 15 year period and ethnic differences in these processes.
As all subjects in our study were of French-Canadian origin, a population with a well established founder effect [35], it is likely that these differences reflect population-specific variants with regards to the reference sequence.
Both last scenarios show human presence; the third one shows faint evidences (one human trackway and two isolated footprints), and in the last one the hunter gatherers are fully represented as a well-established population on the Pampean coast during the Early Holocene, registered at La Olla and Monte Hermoso I sites.
