Endemism, altitudinal migration, and relict populations are some of the natural phenomena to be found on sky islands.
12.
Since the bird has not been seen alive, it is assumed to have a relict population if it still survives.
13.
He suggested that they represented a relict population inhabiting small and isolated thickets of vegetation on the banks of permanent watercourses.
14.
Despite the infinitesimal probability that a relict population persists undetected, there is strong evidence that the Jamaican golden swallow is extinct.
15.
But it's important to realize these are basically relict populations, residuals left from populations that were once much, much larger ."
16.
In continental Europe it occurs much further east than " disjunct and may represent relict populations from a different climatic period.
17.
There are relict populations in the mountains of central Europe belonging to the subspecies " S . u . macroura ".
18.
With increasing aridity, conditions became inamicable for many of these and they retreated to the damper, southwestern mountainous regions, becoming relict populations.
19.
Some suspect that it is a relict population, meaning the range of the fish was once much larger than it is today.
20.
Haplogroup A-L1085 is less common among B-M60 that are common in certain relict populations, such as the Mbuti Pygmies and the Khoisan.
