https://ri.ufs.br/jspui/handle/riufs/2415 2026-08-10T08:56:46Z 2026-08-10T08:56:46Z Almeida, Thieres Santos https://ri.ufs.br/jspui/handle/riufs/25753 2026-08-04T19:28:33Z 2024-02-09T00:00:00Z

Título: Efeitos da relação filogenética e da similaridade funcional na invasibilidade de plantas na Caatinga Autor(es): Almeida, Thieres Santos Abstract: One of the main questions in biological invasions studies is the reason why numerous species are introduced, but only some become invasive. This shift in status has been justified by the phylogenetic relationship and functional similarity between exotic and native species. However, these patterns have not been explored in semi-arid environments like the Caatinga. Thus, the aim of this work is to test how phylogenetic and functional similarity between exotic and native plants in the Caatinga affect invasion status and distribution of invasive species. To achieve this, we constructed a list of exotic plants and obtained their respective invasion statuses in the Caatinga. We gathered occurrence data for these species and native plants. Additionally, a functional database was constructed for these species, including Leaf Area (LA), Height (H), and Seed Mass (SM) attributes. Using the occurrences, we created diversity fields for exotic species, representing the composition of native species that co-occur with each exotic species and calculated phylogenetic metrics for the focal species' distance to its field. Binomial GLMs were employed to assess whether changes in status from exotic to naturalized and from naturalized to invasive are influenced by phylogenetic relationships and functional attributes. For invasive species, we tested if observed phylogenetic distance values differ from those expected by chance. Lastly, we analyzed if there are functional similarities between the statuses of exotic species and native plants. We found that plants phylogenetically closer to Caatinga natives are more likely to become naturalized and invasive. Smaller plants also have a higher probability of becoming naturalized. Among invasive species with a phylogenetic relationship different from what is expected by chance, there is a prevalence of species phylogenetically closer to natives in their field. In comparing statuses, naturalized and invasive plants were found to be shorter and have smaller leaves and seeds than native plants in the Caatinga. The results indicate that Caatinga's environmental filter appears to favor species more similar to natives. The observed functional differences suggest that naturalized and invasive species are competitive, adopting strategies similar to native plants of Caatinga, such as seed bank formation and dense populations during a specific period of the year.

2024-02-09T00:00:00Z Viana, Guilherme Magalhães https://ri.ufs.br/jspui/handle/riufs/25675 2026-07-27T13:44:27Z 2026-01-28T00:00:00Z

Título: Novas compreensões sobre a diversidade de borboletas (Lepidoptera: Papilionoidea) da Caatinga Autor(es): Viana, Guilherme Magalhães

2026-01-28T00:00:00Z Lima, Luiz Antônio Gonzaga de https://ri.ufs.br/jspui/handle/riufs/25637 2026-07-22T19:56:23Z 2026-02-11T00:00:00Z

Título: Determinantes de padrões espaciais, ambientais e evolutivos das lacunas hutchinsonianas de serpentes (Squamata: serpentes) Autor(es): Lima, Luiz Antônio Gonzaga de Abstract: Knowledge of the different dimensions of biodiversity is marked by gaps and biases that unevenly affect data availability, being strongly influenced by geographic, historical, and phylogenetic factors. Among these gaps, the Hutchinsonian shortfall—related to the lack of knowledge about tolerance limits to abiotic factors—stands out as particularly relevant in the context of rapid climate change, since the absence of information on thermal tolerance compromises our understanding of species vulnerability, persistence, and future distributions. In this study, we investigated the magnitude of the Hutchinsonian shortfall associated with thermal biology traits of snakes, assessing the distribution and biases of available knowledge across geographic, phylogenetic, and climatic spaces. To this end, we integrated thermal biology data from the literature with spatial, phylogenetic, and environmental analyses. We compiled morphological, physiological, and climatic information from global databases and a systematic review, including data on thermal tolerance, evapotranspiration, and climatic niche under current conditions and future scenarios. Knowledge representativeness was evaluated using niche overlap tests, spatial autocorrelation analyses, and the phylogenetic aggregation index (NRI), in addition to analyses of changes in climatic conditions projected until 2100 under the SSP585 scenario. Our results demonstrate that knowledge of snake thermal biology is limited, strongly biased, and structured across phylogenetic, environmental, and geographic spaces, characterizing a multifaceted Hutchinsonian shortfall. Data are concentrated in a few clades and temperate regions, incompletely representing the group’s climatic niche, particularly for traits associated with minimum thermal tolerance and water balance. This pattern results in extensive portions of climatic space—especially in tropical regions—being systematically underrepresented. Projections of future climate scenarios indicate climatic rearrangements and the emergence of non-analog conditions, increasing uncertainty and limiting ecological inferences and realistic predictions about snake responses to global climate change.

2026-02-11T00:00:00Z Silva, Franciely Fernanda Barbosa da https://ri.ufs.br/jspui/handle/riufs/25558 2026-07-22T19:50:17Z 2024-05-06T00:00:00Z

Título: Análise de fatores causais e previsão temporal de acidentes por Bothrops no Brasil Autor(es): Silva, Franciely Fernanda Barbosa da Abstract: nakebite envenomation represents a significant public health challenge, especially in tropical and subtropical developing countries where healthcare systems are precarious, antivenoms are scarce, and warmer climates favor the abundance of snakes. This medical emergency primarily affects impoverished individuals living in rural communities, due to their high exposure to risk areas. Brazil is among the countries with the highest annual occurrence of snakebite cases. In the country, snake species of the Bothrops genus are responsible for most recorded accidents. In Chapter 1 of this dissertation, were employed spatial analyses to identify the determinants of Bothrops snakebite incidence in different regions of Brazil. Across the country, significantly higher snakebite incidence rates were observed in areas with higher percentages of native forest and historical forest loss. Additionally, we found that areas with higher temperatures and precipitation levels in the South, as well as higher climatic suitability for the B. jararaca species in the Southeast, exhibited significantly higher snakebite incidence rates. On the other hand, areas with higher percentages of pasture exhibited significantly lower snakebite incidence rates. In Chapter 2, we employed the Prophet time series model to develop snakebite incidence prediction models for each Brazilian region, considering the influence of covariates on predictive models. The Prophet model proved to be an effective tool in predicting snakebite incidence. We found that the Prophet model integrated with the covariate of maximum temperature in the South, forest fires in the North and Midwest, and a model without covariate integration in the Northeast and Southeast regions, demonstrated the best performance, indicating its potential application in epidemiological surveillance of this public health issue. Understanding the determinants and predicting snakebite incidence can help policymakers, public health authorities, and healthcare professionals develop and implement prevention and mitigation measures, thereby reducing the number of cases and associated adverse impacts.

2024-05-06T00:00:00Z