However, that fall is being offset by countries in which populations are already large, or where high numbers of children are born.
The efficiency of diversifying natural selection is quite apparent in circumstances in which populations living a short distance apart have become genetically differentiated.
Mesopredator release, in ecology, a phenomenon in which populations of medium-sized predators rapidly increase in ecosystems after the removal of larger, top carnivores.
Now, in hindsight, it is clear that the country's empathy with New York contained a darker kernel — a kind of victim envy, in which populations of small cities and small towns convinced themselves that they were under imminent threat of terrorist attack.
The dense social novel flourished in countries with large cities - London, Paris, St Petersburg, Moscow - in which populations were in a state of rapid change - and provincial societies in which old orders and hierarchies and habits persisted and change was slower.
In species in which populations are sparsely distributed, a hermaphrodite may be accompanied by one or more small "complemental" males, or the larger individual may develop into a female whereby a smaller individual attaching to it becomes a "dwarf" male.
In collaboration with W.L. Brown, he developed the concept of "character displacement," a process in which populations of two closely related species, after first coming into contact with each other, undergo rapid evolutionary differentiation in order to minimize the chances of both competition and hybridization between them.
Wars of identity those in which populations are mobilised by grievances that have ripened over decades or centuries are the most likely to belong to this category.The drawbacks to partitions in such cases, especially where they require large-scale population movements, are well rehearsed.
Relationships in which populations benefit from practices that harm other populations are environmentally unjust.
These commercial efforts can be seen as "joint social efforts" in which populations are constructed in new ways.
We draw examples from these countries in order to show the ways in which populations are becoming increasingly constructed as a way through which legitimacy is drawn from.
