https://www.alice.cnptia.embrapa.br/alice/handle/item/8 Embrapa Amazônia Ocidental (CPAA) 2026-06-25T20:49:54Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187826 Título: Geographical traceability of Manilkara huberi (Ducke) A. Chev. by chemical signature. Autoria: SILVA, A. C. L. da; LOPES, M. T. G.; TOMAZ, J. S.; VALENTE, M. S. F.; BEZERRA, C. de S.; CAPUCHO, H. L. V.; MARQUES, R. L. S.; LOPES, R.; PEREIRA, A. M.; FERREYRA RAMOS, S. L. Conteúdo: This study evaluated the potential of Total Reflection X-ray Fluorescence (TXRF) as a geochemical traceability method for wood from Manilkara huberi (Ducke) A. Chev., a species of high commercial and ecological value widely exploited in the Legal Amazon. Wood samples were collected in eight locations in the states of Amazonas, Pará, Rondônia, and Roraima, representing different edaphic, geological, and climatic conditions in the context of Amazonian edaphic and geological variability. The multielemental analysis revealed significant variations in trace element and macronutrient concentrations (Fe, Mn, K, Ca, Sr, Rb), reflecting the specific geochemical signatures of each region. Multivariate analyses (PCA and NMDS) showed distinct groupings among the populations, confirming the discriminatory capacity of TXRF in the differentiation of geographical origins. Significant correlations between elements such as K × Rb and Cr × Fe demonstrated consistent patterns of coaccumulation and antagonism associated with local geochemistry. The results prove the efficiency of TXRF as a non-destructive, sensitive, and low-cost technique for origin authentication and forensic investigation of Amazonian wood, strengthening sustainable management policies and combating illegal exploitation. The proposed methodology is a scientific advance in forest traceability and biodiversity conservation, contributing to the transparency and legality of timber production chains in the Amazon. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187793 Título: A modeling framework to assess climate vulnerability and future distributions of tropical tree species: a case study on Brazilian ipês. Autoria: BORBA, F. de C.; BEZERRA, C. de S.; TOMAZ, J. S.; MARQUES, M. J.; CAPUCHO, H. L. V.; SOUZA, S. F. de; FERREYRA RAMOS, S. L.; LOPES, R.; MENESES, C. H. S. G. de; LOPES, M. T. G. Conteúdo: Assessing climate vulnerability of tropical trees requires ecological niche modeling frameworks capable of integrating multiple sources of uncertainty. Here, we present an integrated modeling approach that combines climatic, edaphic, and topographic predictors, dimensionality reduction, multi-algorithm calibration, and ensemble forecasting to evaluate future environmental suitability under climate change. Using two Brazilian Handroanthus species as a case study, occurrence data were spatially filtered, predictors were summarized through principal component analysis, and models were built using six algorithms with performance-weighted consensus projections. Future distributions were projected for three time periods (2041–2060, 2061–2080, and 2081–2100) under intermediate and high emission scenarios (SSP2-4.5 and SSP5-8.5). The framework showed high predictive reliability and revealed contrasting vulnerability patterns, including severe suitability losses for one species and greater stability for the other across phytogeographic domains. Beyond species-specific outcomes, results demonstrate how integrated Ecologial Niche Modeling (ENM) frameworks can identify climate-driven risk gradients and support climate-informed conservation, forest management, and territorial planning in tropical regions. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187751 Título: Análise histológica do intestino e fígado de juvenis de Colossoma macropomum alimentados com diferentes concentrações do óleo essencial de Mentha piperita. Autoria: GAMA, M. M.; SANTOS, A. A. dos; MEIRELES, C. V. de C.; MUÑOZ BUITRAGO, S. A.; CARVALHO, T. L. de; ROCHA, M. D. P. da; CHAGAS, E. C.; CHAVES, F. C. M.; FREITAS, T. M. de Conteúdo: Os óleos essenciais utilizados como aditivo na alimentação de peixes podem auxiliar na melhoria do crescimento, aumento da imunidade e bem-estar dos animais. Com isso, este estudo teve como objetivo avaliar se a ração com diferentes concentrações do óleo essencial de Mentha piperita (OEMP) pode promover alterações morfométricas e morfo-histológicas nos tecidos do intestino e fígado de juvenis Colossoma macropomum. O trabalho foi conduzido no Laboratório de Reprodução de Peixes Amazônicos e previamente aprovado pela Comissão de Ética no Uso de Animais (N° 006/2025), da Universidade Nilton Lins. 2026-01-01T00:00:00Z https://www.alice.cnptia.embrapa.br/alice/handle/doc/1187722 Título: Energy balance, methane production, and blood metabolites of calves with anaplasmosis. Autoria: FERREIRA, L.; SILVA, A. S.; DIAVÃO, J.; CAMPOS, M.; TEIXEIRA, V.; COELHO, S.; SILVEIRA, J. de; TOMICH, T. R.; FACURY FILHO, E.; PEREIRA, L. Conteúdo: This study aimed to evaluate DMI, water intake, energy balance, methane production, and blood metabolites in dairy calves affected by anaplasmosis. Eight post-weaning male Holstein calves with mean (SD) age and BW of 139 ± 28.4 d-old and 164 ± 31.6 kg, respectively, were assigned to one of 3 treatments in a completely randomized design: healthy (32% globular volume [GV]); sick (18.5% GV); and recovery (25.9% GV; recovery calves restored ≥80% of their baseline GV after treatment) in a within-subject experimental design, allowing intra-animal comparisons across the healthy, diseased, and recovery conditions. 2026-01-01T00:00:00Z