Abstract
The effect of the support tree species and the seasonal and altitudinal variations on the physical-chemical characteristics of the water and soil accumulated in plants of the epiphytic bromeliad Tillandsia violacea were studied in El Chico National Park, a temperate forest from Hidalgo, in Central Mexico. The relationship of these factors with arthropods living in theme was also studied. It was found that the tree support species influenced the ions concentration in water and soil. The highest values of ions were found in plants from Abies religiosa. Altitude and the season of sampling affected calcium concentrations, as well as pH of soil and water accumulated on epiphytic Tillandsia. Electrical conductivity, calcium and dissolved organic carbon (DOC) in epiphytic water accounted for more than 60% of the variation in the density of arthropods. In the accumulated soil pH (among 3.4-8.3), organic carbon content (17.16-30.07 mg g -1 ), sodium and potassium concentrations (0.26-1.43, 0.49-34.87 cmol + kg -1 , respectively) were the most important factors correlated with the total fauna abundance. These
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