Further expeditions involved quantitative sampling of habitats in different areas, from the Mediterranean Ridge to the eastern Nile deep-sea fan [213].
Here, we analyse survey data (presence/absence) of speckled warblers in a large sample of habitat remnants from three regions to identify patterns of occupancy.
Through the establishment of an accurate fish distribution database and detailed mapping and sampling of the habitats named above, future research could significantly enhance the level of protection afforded to South African marine biodiversity.
Sites were selected to provide representative sampling of different habitats and elevations and encompass spatial variation.
A feasible alternative is to construct a set of natural populations, based on a broad sampling of field habitats, that collectively encompass the full range of environmental conditions (i.e. the highest and lowest resource levels) in which the species occurs and forms viable populations (Colwell and Futuyma 1971; see Sultan et al. 1998).
In this work, we evaluated the effectiveness of clustering algorithms by observing how well detected clusters corresponded to the sampling information of habitats and genders (six meta-classes, refer to subsection Terminology for details).
On the other hand, IndVal varied between 0 (no indication) and 100 (perfect indication), being highest when all individuals of a species are found in a single habitat (high specificity) and the species occurs in all samples of that habitat (high fidelity).
I knew we got a great sample of that habitat, but we were missing steep slopes to either side of us," the scientist said.
A recent trend in biodiversity conservation has been to undertake conservation planning exercises at regional scale, which attempt to protect a representative sample of all habitat types in an entire ecological region.
In crassicaule scrub five of the 11 samples included one of two redundant species, while in the other six samples of this habitat all the species are functionally different (Figure 4C).
