Banco de semillas del suelo en dos ecosistemas del Parque Universitario de Educación Ambiental y Recreación "Francisco Vivar Castro"
The composition and diversity of the soil seed bank of the ecosystems montane forest and forest plantation of the "Francisco Vivar Castro" University Park of Environmental Education and Recreation was studied; the study was executed from November 2017 to September 2018. In each ecosystem,...
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| Format: | bachelorThesis |
| Language: | spa |
| Published: |
2019
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| Subjects: | |
| Online Access: | http://dspace.unl.edu.ec/jspui/handle/123456789/21678 |
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Add Tag | Summary: | The composition and diversity of the soil seed bank of the ecosystems montane forest and forest plantation of the "Francisco Vivar Castro" University Park of Environmental Education and Recreation was studied; the study was executed from November 2017 to September 2018. In each ecosystem, 45 soil samples were extracted from two plots of 1 ha (10,000 m2) each, which were divided into 25 sub-plots of 20m x 20m, samples that were monitored for 90 days (three months), irrigating twice a day. The identification of species was done in the Herbarium "Reinaldo Espinoza" of the Universidad Nacional de Loja. The composition of the montane forest seed bank consisted of 88 individuals, belonging to seven species, seven genus and five families. Ageratina dendroides and Muehlenbeckia tamnifolia correspond to shrub strata with 54 and five individuals respectively, of which three species with considered native and one Endemic. On the other hand, in forest plantation a total of 61 individuals germinated, belonging to two species, corresponding to two genera and two families, identified as grass and shrub, of which Phytolacca bogotensis is considered Native. The community of seedlings emerging from the seed bank in the soil of greatest specific richness occurred in the montane forest compared to the forest plantation ecosystem. The montane forest presented a higher number of species and individuals compared to the forest plantation site, however there were no statistically significant differences (p=0.122) in the number of individuals, while comparing the species recorded in both ecosystems shows statistical significance (p=0.0451). It can be observed that the genus shared in these two ecosystems are Ageratina and Phytolacca, the main difference being the number of individuals of the species; in the montane forest, the presence of the shrub is greater while in the forest plantation it is the herb with greater coverage. In other words, the montane forest presented five species of emerging seedlings that would be developed exclusively in this ecosystem. With respect to the Pielow equity index in montane forest and forest plantation, it reflected a heterogeneous area in abundance with 0.28 and 0.13, respectively, which means that forest plantation presents greater homogeneity. Keywords: Soil seed bank, montane forest, plantation, natural regeneration. |
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