NUTRIENT CONCENTRATIONS IN THE NATURAL VEGETATION OF THE MOJAVE DESERT

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Abstract
The mineral composition of perennial [vascular] plant species from widely separated sites in the Mojave Desert [USA] varied among sites, but variation between species was more pronounced. According to the nutritional status, species were classified into different categories each of which includes species characteristically rich or poor in a given element. The close relationships between the nutritional status of these species and their sociological relations, as reflected by the principal component analyses, are evaluated. The frequency of correlation between the concentration of the different element pairs across the different species studied was evaluated and discussed. Stress was focused on Ca-Zn relations, with an 80% frequency of positive correlation. The causal factor or factors behind this high percentage of positive correlation frequency was suggested. Linear correlation coefficients between plant composition and soil variables were also obtained.

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