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- Campus Samambaia, Campus Colemar Natal e Silva, Campus Aparecida de Goiânia.
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Item type: Item , The loss of an unknown biodiversity: Spatial gaps in plant survey and conservation in a Brazilian hotspot of biodiversity(2025) Gurgel, Priscila Cabral Silveira; Santos, Juliana Silveira dos; Pena, João Carlos de Castro; Lima, Natácia Evangelista de; Vitorino, Luciana Cristina; Ribeiro, Felipe Martello; Guimarães, Rejane Araújo; Moreira, Jhonatan Willian; Gomes, Jordanna C.; Araújo, Lara M. deOverall, biodiversity sampling is biased in different ways, such as taxa, geography, ecosystem, and accessibility. In the Brazilian Cerrado biome, a biodiversity hotspot, survey gaps have been identified across several taxa, which can hinder conservation effectiveness. Here, we address spatial gaps and sampling bias in plant surveys across Cerrado using an exhaustive literature search, and calculated data completeness and deficiency. We analyzed spatial sampling gaps in the Cerrado ecoregions, protected areas (PAs) and priority areas for conservation (PCs), and bias in relation to the distance to universities, PAs, PCs, and environmental heterogeneity. We also assessed the surveyed sites conservation status at fine and large spatial scales using multitemporal land cover maps (1985–2023), and identified the relationship between the number of species sampled, total surveyed area, and completeness. We found 1445 surveys encompassing 12,881.37 ha surveyed in Cerrado. We found low spatial completeness across all ecoregions. The central and southern Cerrado had higher number of surveys, while the northern and western had lower, < 20 survey sites, and are losing natural vegetation at both fine and large spatial scales. Surveyed sites are close to universities, PAs, and PCs, in areas with low environmental heterogeneity, and had <50 % overlap with PAs and PCs. The number of species increased with the total area surveyed and completeness, indicating that plant diversity is likely underestimated in most ecoregions. It is essential to increase the number of plant surveys in under surveyed ecoregions before remnants are lost due to agricultural expansion.Item type: Item , Host diversity mediates the influence of landscape structure on parasite communities in Cerrado agricultural landscapes(2025) Teles, Wanderson Siqueira; Regolin, André Luis; Silva, Beatriz Elise de Andrade; Maldonado Júnior, Arnaldo; Vilela, Roberto do Val; Silva, Karen Adryanne Borges Almeida e; Pereira, Marcio Junior; Araujo, Matheus Lima; Collevatti, Rosane GarciaParasites are key elements in ecosystem functioning owing to their role in hosts’ population dynamics and abundance, regulation stabilizing trophic networks, and shaping community structure. Landscape changes can affect parasite communities because of changes in suitable microhabitats and on hosts’ community structure. In the Brazilian Cerrado, no study has so far analyzed the effects of intensive agricultural landscaping on helminth parasites of mammals. Here, we fill this knowledge gap, addressing the effects of landscape structure and the Sigmodontinae host's community structure on the richness and abundance of helminth parasites in agricultural landscapes. Using structural equation models, we found that the parasites’ richness and abundance are determined mainly by the rodent hosts’ community structure and are only indirectly affected by landscape structure. We found no direct effect of habitat fragmentation, habitat amount, and landscape compositional heterogeneity on the richness and abundance of helminth parasites, but they directly affected the hosts’ community. Moreover, we found no difference in both the host's and parasite's richness and abundance between crop growing and fallow seasons. Our results show that efforts to preserve helminth parasites may comprise landscape conservation strategies that preserve the biodiversity of the rodent hosts, including conservation and restoration of vegetation remnants at the landscape level.Item type: Item , Habitat fragmentation explains the occupancy probability of the largest herbivore in the Neotropical forests(2025) Regolin, André Luis; Collevatti, Rosane Garcia; Bailey, Larissa L.; Boscolo, Danilo; Rodrigues, Laís Lautenschlager; Beca, Gabrielle Cristina; Dias, Viviane Brito; Rodrigues, Mauro GalettiLarge mammals play an important role in ecosystem functioning, yet the loss of natural vegetation cover due to conversion to agriculture and other land uses has pushed wildlife into small and impoverished habitats. Thus, it is paramount to understand how landscape structure enables large mammals to thrive in tropical rainforests. We surveyed 42 forest landscapes in the Brazilian Atlantic forest for lowland tapir (Tapirus terrestris) using camera traps, analyzed landscape structure based on thematic maps, and assessed the matrix vegetation heterogeneity using satellite image texture. To evaluate the multiscale effects of the predictive variables on the species' occurrence probability, we used a single-season occupancy approach. Beyond advancing the understanding of the species' habitat requirements in human-modified landscapes, we used the species as a model to test theoretical predictions about the scale of effect (SoE), which have yet to be empirically evaluated. Habitat loss and fragmentation per se reduced the lowland tapir's occurrence, as did matrix vegetation heterogeneity. Different landscape metrics influenced species occupancy at distinct spatial scales, and the SoE of fragmentation metrics was not smaller than habitat amount. Habitat fragmentation at a wide scale was the main predictor of species occupancy probability. Our findings highlight the critical role of habitat spatial structure in shaping the distribution of the lowland tapir in human-modified landscapes. Beyond protecting large forest remnants, it is recommended to increase landscape connectivity at a broad scale through ecosystem restoration efforts to safeguard the species' persistence in the Brazilian Atlantic Forest.Item type: Item , Agriculture cover and local vegetation structure shape Squamata’s diversity in agricultural landscapes in Brazilian Cerrado(2025) Mesquita, Gabryella de Sousa; Gurgel, Priscila Cabral Silveira; Ramalho, Werther Pereira; Santos, Juliana Silveira dos; Machado, Iberê Farina; Maciel, Natan Medeiros; Vaz-Silva, Wilian; Ribeiro, Milton Cezar; Collevatti, Rosane GarciaContext Changes in landscapes due to the conversion of natural vegetation into agroecosystems are causing an alarming and rapid loss of biodiversity on a global scale. Objectives We assess how local environmental factors and landscape structure influence Squamata reptiles’ abundance, and alpha and beta diversities in agricultural landscapes in the Brazilian Cerrado. Methods We sampled 20 sites using active visual search and pitfall traps to record Squamata reptiles’ abundance and richness. For each sampling site, we measured seven variables of vegetation structure at local scale and calculated four landscape metrics at five spatial scales. Results We recorded 145 individuals of 30 Squamata species comprising 15 lizards, 12 snakes, and three amphisbaenians. Agriculture cover had a negative effect on lizards’ abundance and richness. No effect was found on the abundance and richness of snakes. Species turnover was the major process responsible for Squamata reptile dissimilarity among sites. Reptile total beta diversity and species turnover were influenced by variations in the number of trees at the local scale. Conclusions Our results highlight the negative effects of agriculture expansion on species abundance and richness in lizard communities. Moreover, vegetation structure may act as an environmental filter and predict the variation in Squamata reptiles’ species turnover between sites. Our findings show that maintaining well-preserved patches of natural vegetation in agricultural landscapes is of utmost importance for Squamata reptiles’ conservation and should be considered in landscape conservation and management design.Item type: Item , Experimentação acessível: a design science na prototipagem de tecnologia assistiva para alunos com deficiência visual(2025) Benite, Claudio Roberto Machado; Rodovalho, Florisbelo Magalhães; França, Fernanda Araújo; Benite, Anna Maria Canavarro