These sandy soil zones were delineated based on their bioclimatic characteristics, aridity, mean soil moisture content and precipitation.
The analytical pdfs are defined by four key dimensionless parameters which characterize temporal variability of wetland hydrologic conditions: scaled aridity index, mean daily stage jump (r), relative rate constants for the two recession processes, and wetland shape coefficient.
Today, the internal aridity and coolness means its volcanism is comprehensively consigned to the past.
It's about aridity, arid hearts, and finding the link to get the flow".
From 13 available CDs the aridity index and mean catchment elevation explained most of the variation in the efficiency of the GP models.
Therefore, we selected two layers which are likely to be important to C. decresii given that the species is a semi-arid, rocky habitat specialist: mean annual aridity index (the monthly ratio of precipitation to potential evaporation and an indicator of dryness) and topographic relief (the range in elevation).
By contrast, we detected strong relationships between colour morph frequencies and a broad environmental gradient (mean annual aridity index) and microhabitat feature (vegetation cover).
Correlations among geographic distance (distance), mean annual aridity index (aridity), topographic relief (topography), proportion cover of vegetation <1 m in height (vegetation), and proportion cover of rocks >50 cm in diameter.
However, we detected remarkably strong associations between morph frequencies and two environmental variables (mean annual aridity index and vegetation cover), which together explained approximately 45%% of the total variance in morph frequencies.
Mean annual aridity index and topographic relief across the range of northern C. decresii with values for Aroona (A), Bimbowrie Station (BS), Devil's Peak (DP), Mt Remarkable (MR), Telowie Gorge (TG), Wilpena (W), Warren Gorge (WG) and Yourambulla Caves (YC).
