Influência da incidência de trepadeiras na intensidade de herbivoria de 16 espécies nativas da Caatinga em um programa de restauração
The Caatinga is in a state of chronic degradation that in several regions has triggered a process of desertification. Current restoration projects have advanced in overcoming classic problems through the use of facilitating plants and the planting of seedlings with deep roots. However, there are sti...
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| Formato: | bachelorThesis |
| Idioma: | pt_BR |
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Universidade Federal do Rio Grande do Norte
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| Endereço do item: | https://repositorio.ufrn.br/handle/123456789/43349 |
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| Resumo: | The Caatinga is in a state of chronic degradation that in several regions has triggered a process of desertification. Current restoration projects have advanced in overcoming classic problems through the use of facilitating plants and the planting of seedlings with deep roots. However, there are still few studies on factors that influence the development of planting, such as the dynamics of herbaceous and herbivorous plants that interact with the seedlings planted. This work aimed to analyze the relationship between the incidence of climbing plants and the intensity of herbivory in order to cover the knowledge about the functioning of the biome and influence the improvement of restoration techniques. We analyzed 16 native plant species in the field, from 10 different families, in a total of 294 seedlings planted for each species, arranged in 147 plots varying in composition diversity. The presence and absence of herbaceous vines and herbivorous leaves per plant were recorded. The incidences of herbivory and climbing differed among the species. The species with higher herbivory intensity was Poincianella gardineriana and with lower Sebastiania macrocarpa. The species with higher incidences of climbing were Sebastiania macrocarpa, Mimosa tenuiflora and Piptadenia stipulacea. The incidence of climbing influenced the intensity of herbovira in Pseudobombax marginatum and there were tendencies to increase or decrease the herbivory in relation to the presence of climbers in four other species. The palatability of the plants is generally the determining factor for the choice of insects. Climbing plants have high nutrient content and high growth rate, being good food options for the insects, which could explain the decrease of herbivory in some species. The increase of herbivory in other species may indicate that leguminous plant species are more attractive than some climbers. The lack of relation between the incidence of climbing and the intensity of herbivory may be related to the change in the size of climbing plants and, consequently, their visibility. We can see that vines can interfere with the intensity of herbivory in restoration projects. We suggest that controlled studies be made regarding the size, species and degree of infestation of vines. |
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