Estructura y composición florística del bosque siempreverde montano bajo de la parroquia San Andrés, cantón Chinchipe, provincia de Zamora Chinchipe-Ecuador
The study was carried out in the San Andrés parish, Chinchipe canton, province of Zamora Chinchipe, with the purpose of contributing to the knowledge of the floristic and structural diversity of a low montane evergreen forest, located between 1996 and 2042 meters above sea level. Six temporary plots...
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| Format: | bachelorThesis |
| Language: | spa |
| Published: |
2018
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| Subjects: | |
| Online Access: | http://dspace.unl.edu.ec/jspui/handle/123456789/20384 |
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Add Tag | Summary: | The study was carried out in the San Andrés parish, Chinchipe canton, province of Zamora Chinchipe, with the purpose of contributing to the knowledge of the floristic and structural diversity of a low montane evergreen forest, located between 1996 and 2042 meters above sea level. Six temporary plots were installed 20 m x 20 m (400 m2) where all woody individuals greater than or equal to 5 cm of D1,30 m were measured; Three subplots of 5 m x 5 m (25 m2) were also delimited to register the bushes. A transect of 10 x 50 m was installed, where the trees greater than or equal to 5 cm of D1,30 m were recorded in X and Y distances to elaborate the horizontal and vertical structural profiles, in addition the diametric structure of the forest was calculated. The floristic composition, the structural parameters were calculated: absolute density (D), relative density (RD), relative dominance (DmR), relative frequency (FR) and importance value index (IVI). 46 species, 20 families and 35 genders were registered; 33 of them belong to tree stratum and 13 to the shrubby stratum. Among the most diverse families in the tree stratum are Lauraceae, Melastomataceae, Rubiaceae y Euphorbiaceae; instead, in the shrubby stratum there are species like Lauraceae, Primulaceae, Chlorantaceae y Rubiaceae. The ecologically most important species within tree stratum are Alchornea glandulosa, Calyptranthes sp., and Nectandra lineatifolia; and into the shrubby stratum Psychotria brachiata, Tetrorchidium sp., y Palicourea sp. The natural regeneration most abundant is in the brinzal category with 49, 50 % while the 50, 5 % is distributed in seedlings, high Latizal and low Latizal the species that present greater regeneration are: Cybianthus sp. and Nectandra lineatifolia. The highest number of individuals per diametric classes was found in the I, II and III classes with 74, 41 % which shows it is a young forest for the diametric distribution that has form of an inverted “J”. KEY WORDS: Lowland evergreen forest, San Andrés, floristic composition, diametric structure. |
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