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Revista mexicana de biodiversidad

versión On-line ISSN 2007-8706versión impresa ISSN 1870-3453

Resumen

VENEGAS-BARRERA, Crystian Sadiel; CORREA-SANDOVAL, Alfonso; MORA-OLIVO, Arturo  y  HORTA-VEGA, Jorge Víctor. Geographical and environmental representativeness of records of gastropods, pteridophytes and aquatic plants in the state of Tamaulipas, Mexico. Rev. Mex. Biodiv. [online]. 2015, vol.86, n.3, pp.719-729. ISSN 2007-8706.  http://dx.doi.org/10.1016/j.rmb.2015.06.002.

Field records have been used to analyze a wide variety of ecological and evolutionary questions. The increasing availability field records databases collecting have promoted its use to identifying potential sites where the species can be found and areas of high species richness. However, such records have been obtained in different years, collectors, study objectives, sampling designs; suggesting that these data are biased in sampling basic assumptions. This study analyzed randomness, independence and representativeness assumptions in the records of the species of gastropods, pteridophytes and aquatic plants of Tamaulipas state. Results suggest that records frequency was higher closer to urban areas than expected at random. In contrast, there were fewer records in areas over 7 km off roads that randomly expected. For the 3 groups of species, we reported significant differences on temperature and vegetal cover percentage between locations observed and random localities in the state. Finally, field records of the 3 groups presented an aggregated spatial arrangement. The discussion highlights the statistical risks of using this type of records to generate geographic distribution models, such as the randomness of the samples, the spatial independence and biased representativeness.

Palabras llave : Independence; Randomness; Spatial bias; Representatively; Roads.

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