Host-plant diversification and spatial heterogeneity of hosts have increased the potential for specialisation, resource partitioning, and unoccupied ecological niche availability for gall-thrips on Australian Acacia.
Potential factors, such as the repeated periods of desiccation experienced in Lake Malawi [ 30, 31], or niche availability with the presence of an extensive cichlid radiation, may have impinged on the abilities of other faunas to diversify.
The diversity of vegetation in semi-arid, ephemeral wetlands is determined by niche availability and species competition, both of which are influenced by changes in water availability and salinity.
This enhancement results from a combined effect of increased marrow niche availability and greater cell division induced by AMD3100.
Hydrodynamic conditions and niche availability were the most important factors controlling the expansion rate of S. alterniflora on the seaward expansion front.
For instance, due to the larger niche availability, species that coexist in heterogeneous environments experience a less severe effect of clustering in their functional traits giving rise to assemblages that are more functionally diverse than in more homogeneous areas.
The presence of these feeding types suggests that niche segregation in Lower and Middle Miocene brachydont ruminants was already fairly pronounced and reflects the hypothesised niche availability in the two palaeobiomes.
In this context, the Kullback-Leibler distance (d) can be viewed as a modified Shannon-Wiener measure of niche breadth that accounts for niche availabilities.
Given the fact that both V. cholerae and S. oneidensis are closely-related marine bacteria that shared a similar ecological niche with poor availability of fatty acids, we initially anticipated that this insert might be an indicator or relic for such kind of unparalleled regulation by FadR (Fig. 1).
Although habitat quality usually is understood from a multidimensional niche space approach, the availability of foraging substrates can be a suitable and more proximate index of habitat quality for species with specialized habitat requirements, like woodpeckers that feed almost exclusively on larvae of wood-boring beetles in the trunks and branches of infested trees.
