If sub-populations experience minor fluctuations in population size, or if colonisation obeys a migrant-pool model, where colonisers originate from a range of populations, sub-populations may not experience genetic bottlenecks and genetic diversities may not be affected to a measurable extent [ 23, 40, 41].
However, due to change in land-use, their limited size, eutrophication and colonisation by invasive exotics, the area occupied by active drift sand is rapidly declining and with it its unique fauna and vegetation.
The low allelic diversity across loci and population bottleneck in P. downsi is further evidence for a small effective population size upon initial colonisation.
There were significant differences between the effect sizes of Biomass, Colonisation and Diversity measures (QM = 53.09, P < 0.001), with Colonisation measures having a greater effect size (1.31 ± 0.282 95% CI) compared to Biomass (0.772 ± 0.535 95% CI) and Diversity (0.530 ± 1.14 95% CI).
A combination of these two extreme scenarios, however, could to some extent counteract each other, which may explain the lack of correlation between relative brain size and island colonisations in crows and ravens.
Such a pattern is compatible with a scenario of site colonisation by one or few individuals, followed by a rapid increase of the population size, supported by the inferred mixed mating system in R. balthica.
Insufficient sample size precluded analysis of bacterial colonisation and BMQ child responses between adherent and non-adherent groups.
During the 1970 1980s the importance of area size and shape, extinction and colonisation rates, and species-area relationships were much discussed from the perspective of how they should influence the design of adequate single reserves or reserve systems (Margules & Usher, 1981; Saunders, Hobbs & Margules, 1991).
For example, the influence of adult female colonisation on variation in group size for an equilibrium group size of 4 decreased from 49%to30%0% as the rate of external infection increased from 0.0001 to 0.01.
To preliminarily test this hypothesis we provide evidence that the potential to support secondary coral colonisation increases with corallith size.
