The phrase "adjacent demes" is correct and usable in written English.
It can be used in contexts related to geography, ecology, or social structures where you are referring to neighboring or nearby areas or communities.
Example: "The study focused on the interactions between adjacent demes of the species to understand their genetic diversity."
Alternatives: "neighboring populations" or "contiguous areas".
Secondly, when host and parasite migration is limited to adjacent demes, and initial frequencies differ between populations, waves of genotypes can spread in the metapopulation [ 19, 30].
Local connectivity between adjacent demes is transiently revealed by the structure of the neutral hitchhiking locus, as long as gene flow re-homogenizes allele frequencies.
The extent of genetic differentiation within the introgressed species was measured between two populations separated by a weak barrier to gene flow (m = 0.01), other adjacent demes being otherwise highly connected in the standard linear stepping-stone model.
Thus, local migration in this population setup resembles diffusion and is expected to result in a spatial correlation of infection frequency, with adjacent demes being more similar in infection than demes further apart.
Accordingly, migration out of infected demes will drive up infection frequency in adjacent demes very effectively and is more likely to bring infection frequency in the range of positive selection for infection.
Each deme has two, three, or four neighboring demes, depending on where it is located on the grid.
A proportion of individuals belonging to each deme (the migration rate m) migrates to neighboring demes (spread equally among neighbors, Fig. 2b), allowing a population expansion into all demes from one or two source demes.
Spatial expansion thus creates a selective force whereby cooperator-enriched demes overtake neighboring defector-enriched demes in a "survival of the fastest".
The high genetic diversity and overlapping deme structure of the colonizing trees also show that traditional coffee farms maintain genetic connectivity with adjacent habitats and can serve as foci of forest regeneration.
