DSpace Coleção: Artigo em periódico indexado (CNPMA)

Data gaps in water-related ecosystem services for urban flood risk adaptation in Brazil: a national diagnostic and policy-oriented analysis.

Thu, 01 Jan 2026 00:00:00 GMT

Título: Data gaps in water-related ecosystem services for urban flood risk adaptation in Brazil: a national diagnostic and policy-oriented analysis. Autoria: GJORUP, A. F.; PRADO, R. B.; MONTEIRO, J. M. G.; HELFER, F. Conteúdo: Urban floods are among Brazil’s most pressing climate-related risks, revealing limitations in conventional drainage systems and fragmented governance structures. This study provides a national diagnostic of how Water-related Ecosystem Services (WES) are addressed in the context of urban flood-risk adaptation in Brazil, based on the integration of three analytical components: a systematic literature review (2017–2025), a diagnostic assessment of national environmental datasets, and a comparative synthesis of city-level initiatives. The review of 94 peer-reviewed studies indicates that Brazilian research remains predominantly focused on watershed-scale management, while international literature increasingly advances operational approaches based on Nature-based Solutions (NbS) and Blue–Green Infrastructure (BGI). The analysis of environmental datasets reveals recent progress in data availability and spatial coverage, alongside persistent gaps related to interoperability and update frequency. A comparative synthesis of experiences from Curitiba, Recife, and São Paulo highlights that, although NbS initiatives are present and associated with flood-risk reduction efforts, their implementation remains largely pilot-based and weakly institutionalised. Overall, the diagnostic identifies three strategic pathways—data interoperability, institutional coordination, and equity-oriented monitoring—as key elements to strengthen the integration of WES into urban flood-risk adaptation and water resource management in Brazil.

Suspect screening for PFAS in groundwater with an accessible LC–MS workflow.

Thu, 01 Jan 2026 00:00:00 GMT

Título: Suspect screening for PFAS in groundwater with an accessible LC–MS workflow. Autoria: SILVA, B. F. da; BRUCKNER, K. N.; QUEIROZ, S. C. do N. de; BOTTOLI, C. B. G.; CHOROVER, J.; ABRELL, L. Conteúdo: Abstract: Groundwater in North America is contaminated with per- and polyfluoroalkyl substances (PFAS) at more than 9500 locations. A major source of this contamination is aqueous film-forming foam (AFFF), widely used for fire suppression at military facilities and airfields. Many of the thousands of PFAS remain poorly characterized and are not amenable to targeted quantitative analytical methods, which allow them to remain undetected. Suspect screening, an analytical strategy that searches for potential or likely compounds from a predefined list without requiring analytical reference standards, combined with liquid chromatography-high resolution tandem mass spectrometry (LC-HRMS/MS), has emerged as an alternative or complementary approach to classical targeted analysis. Herein, an accessible suspect screening workflow was developed using data-dependent acquisitions and the NIST suspect list of 4712 PFAS, processed with TraceFinder software, followed by FreeStyle MS2 spectral management. Eleven PFAS were identified in AFFF-impacted groundwaters, including six compounds previously undetected by targeted experiments: 1H-perfluoropentane, 1H-perfluoroheptane, perfluorobutylsulfonamide (FBSA), perfluorohexanesulfonamide (FHxSA), perfluoropropanesulfonamide (FPrSA), and perfluoropropanesulfonic acid (PFPrS). Direct sample injection imposed sensitivity limitations, likely preventing the detection of additional PFAS present at lower concentrations. Nevertheless, the simplicity and reduced software investment requirements of this workflow make it a promising approach for broad adoption by the scientific community.

Boosting growth, health, and productivity of Nile tilapia by supplementing Artemisia annua under tropical net cage farming conditions.

Thu, 01 Jan 2026 00:00:00 GMT

Título: Boosting growth, health, and productivity of Nile tilapia by supplementing Artemisia annua under tropical net cage farming conditions. Autoria: SOARES, M. P.; MARASCHI, A. C.; ANGELIS, C. F. de; QUEIROZ, S. C. do N. de; JONSSON, C. M.; CAMPOS, C. M. de; FERNANDES, M. N.; LEITE, C. A. C.; RANTIN, F. T.; SAMPAIO, F. G. Conteúdo: Abstract: The rapid global expansion of aquaculture demands innovative strategies to enhance productivity while safeguarding fish health under intensive rearing conditions. This study investigated the effects of dietary supplementation with an alcoholic extract of Artemisia annua (ae-Aa) on growth performance, physiological stress, immune responses, oxidative status, and tissue morphology of Nile tilapia (Oreochromis niloticus) cultured in a high-density net-cage system. A 2 × 2 factorial was applied, including two dietary treatments (supplemented, S; non-supplemented, NS) and two feeding periods (30 and 60 days), yielding four experimental groups (S-30, NS-30, S-60, NS-60). Compared with their respective controls, ae-Aa supplementation significantly enhanced survival and growth at both time points (P < 0.05), evidenced by greater weight gain and protein efficiency ratio and a reduced feed conversion ratio. Supplemented fish also showed increased intestinal villus thickness and hepatosomatic index (P < 0.05). Plasma cortisol concentrations were significantly lower in supplemented groups at both sampling periods (P < 0.05). Moreover, ae-Aa supplementation stimulated innate immune responses, reflected by elevated lysozyme activity, plasma protein level, and leukocyte respiratory burst (P < 0.05). Oxidative stress was notably mitigated in supplemented fish (P < 0.05), with reduced lipid peroxidation, enhanced catalase, glutathione peroxidase, and glutathione S-transferase activities, and decreased DNA damage observed at 60 days. In conclusion, dietary ae-Aa supplementation improved growth performance, immune competence, antioxidant capacity, and tissue integrity while alleviating physiological stress in Nile tilapia, supporting its application as a sustainable plant-based feed additive for intensive aquaculture systems.

Comparision of methane emissions measured in a paddy rice field in Southeastern Brazil with a DNDC model-simulated emissions.

Thu, 01 Jan 2026 00:00:00 GMT

Título: Comparision of methane emissions measured in a paddy rice field in Southeastern Brazil with a DNDC model-simulated emissions. Autoria: LIMA, M. A. de; PESSOA, M. C. P. Y. Conteúdo: Abstract: Paddy rice cultivation is an important anthropogenic source of atmospheric methane (CH4). Quantifying CH4 emissions under specific crop conditions is essential to improve the accuracy of global greenhouse gas estimates. Computer modeling simulation may contribute to a better understanding of how different environmental factors affect seasonal CH4 emissions, thereby supporting mitigation strategies. The objective of this study was to compare three-growing-season field measurements of CH₄ emissions from a paddy rice field, under pre-germinated system, in Pindamonhangaba, São Paulo State, Brazil, with estimates of emissions obtained from simulations using the DeNitrification– DeComposition (DNDC) model under the same conditions. Methane fluxes were measured weekly using the closed-chamber method, and model input parameters were derived from the site-specific conditions (soil, crop, management, and climate) for each season. Daily pattern of CH4 fluxes and seasonal emissions were obtained by DNDC for the evaluated growing seasons. The mean seasonal CH4 fluxes quantified in the field ranged from 231.72 ± 40.23 to 285.25 ± 51.66 kg C-CH4 ha-1, while those obtained using DNDC ranged from 210.53 to 267.39 kg C-CH4 ha-1. The model results fell within the variability of field quantifications, with one season slightly above the upper observational limit, demonstrating the good accuracy of this simulator to estimate seasonal methane emissions for the site. However, in spite of the simulated daily methane fluxes have showed a temporal trend similar to that observed in the field for all the growing seasons, the magnitude of the simulated emissions differed from some observed values.