http://repositorio.ufc.br/handle/riufc/56995 2026-06-12T16:24:56Z http://repositorio.ufc.br/handle/riufc/86529 Título: Sinopse da família Melastomataceae Juss. para o estado do Ceará Autor(es): Mota, Carlos Adrian Rodrigues Abstract: Melastomataceae is a monophyletic family comprising 173 genera and approximately 5,850 species, of which 1,523 occur in Brazil and 1,008 are endemic. This study aims to assess the actual species richness and distribution of Melastomataceae in the state of Ceará, based on data obtained from biological collections and field expeditions, through the analysis of herbarium specimens, illustrations, photographs, and type material. A total of 50 species and 14 genera were recorded, including nine new species records and three new genus occurrences for the state. Furthermore, field expeditions enabled the recollection of Aciotis annua in Ceará after more than 180 years without records. This study provides taxonomic comments, identification keys, photographic plates of plants in the field, and maps of geographic distribution. Tipo: Dissertação 2026-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86371 Título: Microbioma associado à Mimosa tenuiflora (Willd.) Poir. em área suscetível à desertificação da caatinga e o potencial funcional de bactérias endofíticas para a recuperação de áreas degradadas Autor(es): Rocha, Jeanderson da Silva Abstract: Desertification in the Brazilian semiarid region poses a growing threat to Caatinga biodiversity and ecosystem services. Mimosa tenuiflora (Willd.) Poir. (jurema-preta) stands out as a dominant pioneer species in degraded areas and for its contribution to natural regeneration; however, the microbiological mechanisms underlying its resilience remain poorly understood. This study aimed to characterize the bacterial microbiome associated with the rhizosphere and root endosphere of M. tenuiflora in an area susceptible to desertification and evaluate the effect of endophytic bacterial inoculation on seedling early development. To this end, the root bacterial microbiome of M. tenuiflora was characterized for the first time in the municipality of Irauçuba, Ceará state, through amplicon sequencing of the 16S rRNA gene V4 region. Libraries were normalized by rarefaction (60,000 reads/sample) and analyzed for alpha diversity, beta diversity, and taxonomic composition. The rhizosphere exhibited significantly higher alpha diversity than the endosphere, a pattern consistent with progressive host-mediated filtering. Beta diversity analysis revealed significant compositional differentiation between compartments (PERMANOVA: R² = 0.536, p = 0.009), with greater rhizospheric homogeneity and endospheric heterogeneity. At the phylum level, Pseudomonadota dominated the endosphere, while Actinomycetota was more abundant in the rhizosphere. Differential abundance analysis identified 11 significantly enriched genera (p-adj < 0.05, |log2FC| ≥ 2): 10 in the rhizosphere (Conexibacter, Neobacillus, Crossiella, among others) and one in the endosphere (Rhizobium). The endosphere was dominated by the Burkholderia-Caballeronia-Paraburkholderia complex, known for symbiotic nitrogen fixation and multiple plant growth-promoting capabilities, followed by Klebsiella and Mycobacterium. The results reveal functional partitioning between compartments, with endospheric specialization in nutrient provisioning and stress mitigation versus maintenance of rhizospheric diversity related to decomposition and nutrient cycling. In vitro inoculation experiments with M. tenuiflora seedlings demonstrated that the Serratia rubidaea + Citricoccus sp. endophytic consortium promoted increased root growth compared to the control (p.adj < 0.05), confirming the potential of native strains to promote plant growth. This structuring constitutes an adaptive strategy to desertification conditions, explaining the resilience of M. tenuiflora in degraded soils and providing the basis for bioinoculant development and Caatinga ecological restoration strategies. Tipo: Dissertação 2026-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/86067 Título: Enriquecimento ambiental como ferramenta para o bem-estar do peixe-boi marinho em cativeiro Autor(es): Carvalho, Renata Cândido Abstract: The state of Ceará is the portion of the Brazilian coast with the highest record of strandings of Antillean manatees, Trichechus manatus. This relatively high number of strandings is due, at least in part, to the silting up of estuaries and rivers that, under normal conditions, function as a nursery for these animals. Due to these strandings, the NGO Association for Research and Preservation of Aquatic Ecosystems (Aquasis) created a successful preservation program for this species, in which live stranded marine manatees are rescued and taken to rehabilitation, where they receive veterinary care, food, water, spending years in captivity until the moment of release. Although essential for the rehabilitation of these animals, captivity can harm their health or wild instincts, given the routine and predictable access to resources to which they are subject. One way to mitigate these losses is the use of environmental enrichment strategies, which can reduce stereotyped behaviors. In this context, the present study aimed to test whether environmental enrichment improves the well-being of captive manatee. For this, different environmental enrichment techniques were applied to four manatees that were in captivity at Aquasis for rehabilitation (and subsequent release). The pre-enrichment and post-enrichment behavioral budget of these animals was recorded through observations following the scan sampling methodology. From this, it was evident that environmental enrichment alters the behavioral budget of manatees in captivity, with emphasis on the increase in the animals' movement through the enclosure, as well as in foraging behaviors, suggesting an improvement of their well-being. The interval between the animals' meals is the ideal period for the application of environmental enrichment, considering that the animal is active during this period, especially in the morning, before the first feeding. Environmental enrichment can be considered an indispensable strategy for the routine of manatees undergoing rehabilitation. It is recommended that additional studies with different types of enrichment be carried out. Tipo: Dissertação 2022-01-01T00:00:00Z http://repositorio.ufc.br/handle/riufc/85387 Título: Estado de conservação da ictiofauna continental no Ceará, Brasil Autor(es): Gomes, Maria Cecília Feitoza Abstract: Information about composition, distribution, population characteristics, and endemism is essential for developing a Red List of Threatened Species, a fundamental tool for biodiversity conservation actions. Aiming to characterize the state of conservation based on IUCN (International Union for Conservation of Nature) criteria of freshwater fish species occurring in the Ceará State (CE), we conducted an inventory of the continental ichthyofauna of the CE using available literature and data from the ichthyological collections of the Federal University of Rio Grande do Norte (UFRN) and the Federal University of Paraíba (UFPB). The minimum convex polygon (MCP) methodology was used to obtain the extent of occurrence (EOO) and area of occupancy (AOO) of each species Eighty-five freshwater fish species belonging to 59 genera, 25 families, and eight orders were recorded in CE. Among the orders, Characiformes stood out with 47% of the species and Siluriformes 32%. The remaining orders (six) comprised approximately 20%. Among the families, Characidae accounted for 19% of the species, Loricariidae 15%, and the others 66%. Of the total native species, 43 (51%) are endemic to the Caatinga. Based on IUCN methodology, 44 species were considered Least Concern (LC), four Near Threatened (NT), 17 were threatened, 15 presented insufficient data for analysis (DD), and five species were not applicable for evaluation (NA). Among the 17 species considered at risk of extinction, five were classified as Vulnerable (VU), five as Endangered (EN), and seven as Critically Endangered (CR). Among the most threatened groups of fish, the family Rivulidae, from temporary or perennial wetlands, stand out. Of the 81 species with georeferenced location records, 25 occur in a single basin, 23 in two or three basins, and 33 in four or more basins. The Metropolitan and Salgado basins presented the highest species richness (44 and 39, respectively). In contrast, the Serra de Ibiapaba and Curu basins had the lowest richness (6 and 17 species, respectively), indicating wide variability among the 12 evaluated basins (average 25,1 ± 10,3) and the need for greater sampling efforts. The basins with the highest relative number of threatened fish species were the Metropolitan, Litoral, and Baixo Jaguaribe basins, with seven, four, and two species, respectively. No species were found to be common among the three basins. It is concluded that there are serious risks to the maintenance of freshwater fish biodiversity in CE due to large projects with the potential to cause impacts in the areas of influence of the main hydrographic basins, necessitating mitigation programs. The creation of conservation units that include action plans for the protection and recovery of the most threatened species and studies to resolve taxonomic and under-sampling problems is urgently needed. Tipo: Dissertação 2024-01-01T00:00:00Z