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In this work we studied the multifractal spectrum behavior calculated during the presence of a possible seismic electric signal (SES). This signal was detected in geolectrical time series registered prior a seism of M6.7 occurred on October 24, 1993 in México. We calculated the multifractal spectrum by using no overlapping windows of segments of 1 hour. Our results display the singularities spectrum...
The composition of cyanobacteria, mosses, and lichens of biological soil crusts were correlated with soil characteristics and sun exposure along an environmental transect. The study was conducted in Zapotitlán drylands, a locality within the Tehuacán–Cuicatlán Valley, central Mexico, where a great variety of environments for crust development exist due to landscape fragmentation. Data were analyzed...
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