Increasing habitat loss and fragmentation may ultimately decrease population sizes of saw whet owls in this area and other species that are similarly affected by changes to in habitat composition or configuration.
It is also worth noting that there are situations in which the response to density-dependent selection may actually decrease population density.
So although green crab may decrease shellfish population densities, they are likely to feed on whatever species are the easiest to access, maintaining bivalve populations at low densities but not extirpating the populations.
Our results indicate that fishing may decrease effective population size, thus increasing the rate of neutral evolution due to genetic drift.
Thus, blocking VEGF-C may be useful in combination with chemotherapeutic drugs (especially with those known to induce ROS) to increase treatment efficacy, because inhibition of VEGF-C may decrease the TIC population, sensitize cells to oxidative stress induced cell death and affect the tumor microenvironment by decreasing lymphangiogenesis.
If this trend continues, the genetic diversity of many of these populations may decrease rapidly, leading to potential population extinctions.
Further, introgression by common farmed broodstock into wild populations may decrease genetic distinction among wild populations (Hansen et al. 2009; Glover et al. 2012).
Other limitations of this study are its homogenous Asian population, which may decrease external validity to other populations, and the use of SU in the control group.
However, other studies have found bobcat populations may decrease in areas with high coyote populations, with the more social inclination of the canid giving them a possible competitive advantage.
However, the periodicity of fire has increased to less than the 30 40 years for which it is probably adapted; this may be driving decreasing population sizes in southern California [58], [66].
