Diversidad y similaridad de arvenses en plantaciones forestales de Gmelina arborea Roxb. (melina) en la zona central del litoral Ecuatoriano, año 2019.
The purpose of the present investigation was to determine the diversity and similarity of weeds in plantations of Gmelina arborea Roxb. (melina) in the central area of the Ecuadorian litoral. The establishment of 24 UM of 256 m2 was carried out in seven study sites applying the minimum area criterio...
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| Format: | bachelorThesis |
| Sprog: | spa |
| Udgivet: |
2019
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| Fag: | |
| Online adgang: | http://repositorio.uteq.edu.ec/handle/43000/4081 |
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Tilføj Tag | Summary: | The purpose of the present investigation was to determine the diversity and similarity of weeds in plantations of Gmelina arborea Roxb. (melina) in the central area of the Ecuadorian litoral. The establishment of 24 UM of 256 m2 was carried out in seven study sites applying the minimum area criterion. Data were recorded as common name, morphological characteristics, number of individuals per species, geographical coordinates in UTM. Frequency, abundance, density, IVI, Jaccard, Shannon and Simpson parameters were calculated. Cluster analysis was performed at the seven study sites indicating the composition of 3 clusters, in addition to an ANOVA, t-Student test and Tukey test. A total of 26293 individuals of 102 species, 8 undetermined and 90 genera of 49 families were recorded. The most representative families were Euphorbiaceae and Asteraceae, the species with the highest abundance was Laportea aestuans, the species Acalypha alopecuroides was the species with the highest IVI and frequency, while the species with the highest density was erect bonariensis. The highest similarity was obtained at the Yurac Yacu 2012 and Toachi 2013 sites. The Simpson and Shannon indices show a medium diversity of weeds in the study sites. The ANOVA showed significant differences in the number of individuals per species, with p = 0.0006095 <0.05 at 95%, and the t test showed significant differences in the parameters of similarity and diversity evaluated. As a main conclusion there is diversity and similarity of weeds in plantations of G. arborea in the sites La Palma 2015, Yurac yacu 2012 and Toachi 2013, diversity that is attributed to the proximity of the location of the sites, the foothills of the mountain range and the conditions edaphoclimatic present. Key words: weeds, abundance, diversity, similarity |
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