Riqueza de espécies e facilitação influenciando o aporte de serrapilheira em uma área restaurada da Caatinga
Unsustainable land use activities, combined with climate change, are the main causes that lead to soil deterioration and interfere with essential processes such as nutrient cycling. In this sense, restoration programs are fundamental in the recovery of these ecosystems. Several studies highlight the...
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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/123456789/50936 |
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| Resumo: | Unsustainable land use activities, combined with climate change, are the main causes that lead to soil deterioration and interfere with essential processes such as nutrient cycling. In this sense, restoration programs are fundamental in the recovery of these ecosystems. Several studies highlight the importance of quantifying the contribution of litter to determine the level of regeneration of restored environments as well as the stage of conservation of these areas. Thus, we sought to understand how the richness of plant species and facilitation mechanisms, as well as the composition of the community affect the contribution of litter in a restored area of Caatinga. The research was carried out in a 3.5 ha area located in the Assú National Forest. In the study 310 litterfall collectors were used, distributed in 155 plots of the experiment. Each stored sample was dried in an oven at 60ºC and weighed, in order to estimate the total weight corresponding to the contribution of burlap in the communities. The study assumes that communities with higher species richness have a greater potential to favor the contribution of litter. Facilitating species are also expected to have higher leaf and biomass production. We suggest that litter production is higher in communities with higher species richness, especially in those composed of more facilitating plants. Contrary to our hypotheses, our results indicate that plant species richness did not affect the contribution of burlap in the community, moreover, facilitation and species composition did not show significant effects on biomass production in the plant community. Although the results do not show a significant relationship in the first four years of restoration between the variables tested, monitoring these measures throughout the development of restoration projects is necessary. Future studies may show that maintaining high diversity in the community and using species efficient in the reconstruction of ecosystem functions ensures a greater likelihood of maintaining the functioning of natural ecosystems in more mature restored areas. |
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