TITLE

LOS PETENES DE SIAN KA'AN, QUINTANA ROO Y SU RELACION CON GRADIENTES DE PRESION HIDRICA

AUTHOR(S)
Lopez-Portillo, Jogre; Ezcurra, Exequiel; Maass, Jose Manuel
PUB. DATE
May 1989
SOURCE
Acta Botanica Mexicana;may1989, Issue 5, p19
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
It has been suggested that hummocks (petenes), present in karstic areas, are fed with fresh, continental water from underground sources. We tested this supposition. Three hummocks and their associated inmersed areas were chosen around the Chunyaxché Lagoon, and soil samples from edaphic horizons and samples from the phreatic water were taken. Samples from continental and sea water were also taken. In water and soil samples, pH and concentration of four cations were determined. Also, total nitrogen, phosphorus and sulphur were determined in soils. A multivariate analysis of variance (MANOVA) made on the variables measured in soils showed no significant differences between the hummocks and their associated inmersed areas. For the water samples, the MANOVA indicated that hummocks and their associated inmersed zones differ more from continental areas than between them. These results suggest that a direct continental water source is not necessary to determine the presence of a hummock. Thus, hummocks could be considered as islets which are occupied by tropical evergreen seasonal forest and/or mangrove species, according to the flooding conditions in the islet.
ACCESSION #
21368006

 

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