Sentence examples for lower population size from inspiring English sources
The greater endemicity and lower population size of tropical species could make them more susceptible to the types of fragmentary disturbance inflicted by deforestation and urban development.
In effect, the loss of a high proportion of juveniles serves not only to lower population size, but also to increase calving interval where the lost calf creates a gap between siblings.
A lower population size is also suggested by the higher differentiation (FST) among D. fennicella populations than among sexual populations.
The impact of lower population size will be particularly severe if migration among populations is also reduced as a result of blockages.
In comparisons between D. miranda and D. melanogaster, however, I infer that mutation rates are actually lower in the species with the lower population size, while fitness effects for beneficial mutations appear much larger.
A previous study on Fusarium head blight resistance, which presumably has a similar genetic architecture as of Septoria tritici blotch resistance [ 38], yielded a substantially higher prediction accuracy of 0.61 despite a lower population size [ 18].
Small sites often contained high numbers of rare species per unit area, but presumably at lower population sizes.
The counter-scenario, no poisoning and no availability of AFS, predicts slightly lower population sizes but with near stable trajectories.
This suggests that introduction events may have been less frequent and involved a lower number of differentiated source populations and/or individuals (i.e. lower propagule pressure), possibly leading to lower population sizes and more genetic drift (but only the Beijing population seems to have undergone a recent bottleneck).
A second hypothesis is that periodic droughts may have cut down genetic variation across historical times [54]; in dry years, rain-splash and moisture may not be sufficient to produce dense epidemics, resulting in lower population sizes and therefore in higher levels of random genetic drift.
However, males had lower population sizes and migration rates than females throughout the Bantu dispersals.
