Figures & data
FIGURE 1. Map of King George Island showing the relative locations of the studied sites. BCAA = Base Científica Antártica Artigas, BG = boundary of the glacier, IFA = ice-free area. Digitalized image from the Letter 1111: Artigas Antarctic Scientific Base (Service of Oceanography, Hydrography and Meteorology of the Navy of Uruguay, 1991).
TABLE 1 Some soil properties in the boundary of the glacier (BG) and in the ice-free area (IFA) (D. Benzo et al., unpublished data).
TABLE 2 Values of soil phosphorus fractions (mg kg-1) in the boundary of the glacier (BG) and in the ice-free area (IFA).
FIGURE 2. Principal Component Analysis for soil P fractions data of the studied sites. IFA = ice-free area, BG = boundary of the glacier.
TABLE 3 Eigenvalues and cumulative percentage variance of soil phosphorus fractions for the Principal Component Analysis carried out with data of the studied sites.
TABLE 4 Values of iron and aluminum fractions (mmol kg-1) in the boundary of the glacier (BG) and in the ice-free area (IFA).
FIGURE 3. Typical X-ray diffraction patterns showing the three main peaks of the identified minerals at the studied sites. IFA = ice-free area, BG = boundary of the glacier, Lab = labradorite, Qz = quartz, Hem = hematite, HyAP = hydroxyapatite, Chl-Vrm-Mnt = chlorite-vermiculite-montmorillonite.
TABLE 5 Chemical composition and d-spacing values (Å) of the three main peaks of identified minerals by XRD analysis in each studied site.
TABLE 6 Alkaline phosphatase (AP) activity and the fluorescein diacetate (FD) hydrolysis of soils in the boundary of the glacier (BG) and in the ice-free area (IFA).