Geophytoelectrical current in trees of a subtropical rainforest in Mexico |
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Authors: | L Yáñez-Espinosa T Terrazas L López-Mata L Fucikovsky |
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Institution: | (1) Programa en Botánica, Colegio de Postgraduados, km 36.5 carr. México-Texcoco, Montecillo, Estado de México, 56230, México;(2) Programa en Fitopatología, Colegio de Postgraduados, km 36.5 carr. México-Texcoco, Montecillo, Estado de México, 56230, México;(3) Present address: Instituto de Ecología, Unidad de Recursos Forestales, Xalapa, Veracruz, 91070, México |
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Abstract: | The geophytoelectrical current of three evergreen tropical tree species is studied as an indirect measure of their relative
water content. Two intermediate shade-tolerant species (Aphananthe monoica and Pleuranthodendron lindenii), distributed in the middle and upper canopy strata, and an understory shade-tolerant species (Psychotria costivenia) were examined. The annual rhythm of geophytoelectrical currents per cm of diameter (DBH) is seasonal, with the highest occurrence
in the winter and summer. There is a significant association between maximum temperature, moisture in the environment, and
geophytoelectrical current per cm of DBH in the three species, as shown by multiple regression analysis. This finding suggests
the existence of various geophytoelectrical current patterns which differs from that reported for temperate species. |
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Keywords: | Aphananthe monoica evergreen tropical trees Pleuranthodendron lindenii Psychotria costivenia water content |
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