Diversidad y similaridad de arvenses en plantaciones forestales de Tectona grandis L.f. (teca) en la zona central del Litoral ecuatoriano.
The purpose of this research analyzes the diversity and similarity of existing weeds in commercial plantations of Tectona grandis L, f. (teak) located in the central area of the Ecuadorian coast. The main objective of the research was to assess the diversity and similarity of Arvenses in forest plan...
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| Format: | bachelorThesis |
| Language: | spa |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://repositorio.uteq.edu.ec/handle/43000/6330 |
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Add Tag | Summary: | The purpose of this research analyzes the diversity and similarity of existing weeds in commercial plantations of Tectona grandis L, f. (teak) located in the central area of the Ecuadorian coast. The main objective of the research was to assess the diversity and similarity of Arvenses in forest plantations of T. grandis in the central area of the Ecuadorian coast. 33 UM of 256 m2 was established at the nine study sites, applying the minimum area method. Data were recorded such as, scientific name, morphology, number of individuals per species. The frequency, abundance, density, IVI, Jaccard index, Shannon and Simpson were calculated. Cluster analysis of the nine study sites were performed. In addition, an ANOVA and t- Student test were performed to make inferences between the sites analyzed. A total of 20853 individuals were recorded, grouped into 122 identified species, 38 indeterminate and 105 genera, corresponding to 66 botanical families, the most representative families being Compositae and Piperaceae, Rottboellia cochinchinensis was the most abundant species, Cecropia sp, the most frequently, Asystasia gangética the highest density and IVI. The greatest similarity was between the sites La Palma 2009 and La Palma 2011. According to the Simpson and Shannon Index at all nine sites, there is average diversity. The ANOVA had no significant differences in the number of individuals per species. The t-test responds that there are no differences in the evaluated parameters. Based on the results obtained, the alternative hypothesis that states that there is diversity and similtud of Arvense species in T. grandis plantations is accepted. In La Palma 2009 and La Palma 2011; and in Yurac Yacu 2009 and Yurac Yacu 2011, due to its proximity to the mountain range with favorable conditions for the existence of greater diversity of Arvenses. Keywords: Arvenses, frequency, teca, diversity, abundance. |
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