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ENSO impacts on litter stocks and water holding capacity in secondary forests in eastern Amazonia

Journal of Forestry Research 2024年第1期35卷 83-89页

作者： julia Isabella de Matos rodrigues Walmer Bruno Rocha martins Victor Pereira de Oliveira Myriam Suelen da Silva Wanzerley Hélio Brito dos santos Júnior Francisco de Assis Oliveira Graduate Program in Forestry Sciences Av.Presidente Tancredo Neves2501BelémPará66077-530Brazil Federal Rural University of Amazonia Av.Presidente Tancredo Neves2501BelémPará66077-530Brazil Federal Rural University of Amazonia Tv.Pau-AmareloCapitão PoçoPará68650-000Brazil National Institute of Amazonia Research Av.Constelação Cruzeiro do SulManausAmazonas 69060-062Brazil

Among the impacts of climate change,there is the intensification of phenomena such as the El Niño South-ern Oscillation(ENSO)responsible for El Niño and La Niñ***,understanding their effects on the functional pro-cesses of forests is ***,this study evaluated the effects of ENSO on litter stock and water holding capac-ity(WHC)in a successional forest in eastern *** occurred in periods with the most rainfall in El Niño(2019)and least in La Niña(2021)*** permanent plots were used to sample *** effects were evident for WHC,higher during El Niñ***,this influence was not clear for litter,as only in the rainy season effects were *** was a positive correlation of WHC with precipitation and humidity,while litter stocks were negatively correlated with temperature and wind *** the subject of this study requires long-term assessments,preliminary results suggests that,depending on the intensity of ENSO,forest functional processes can be strongly impacted and *** conclusion reinforces warnings by the scientific community about the impacts of climate change on the maintenance of litter stocks,decomposition and,consequently,the biogeochemical cycle and essential ecosystem services for the maintenance of Amazonia *** need to develop long-term research to understand the effects of climatic change on litter stocks and water holding capacity is highlighted,especially in Amazonia.

关键词： Seasonality Climate change Succession ecosystem Biogeochemical cycle Amazonia biodiversity

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Occurrence of Antimicrobials in River Water Samples from Rural Region of the State of Rio de Janeiro, Brazil

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Journal of Environmental Protection 2016年第2期7卷 230-241页

作者： Mychelle Alves Monteiro Bernardete Ferraz Spisso julia rodrigues martins pastor dos santos Rafaela Pinto da Costa Rosana Gomes Ferreira Mararlene Ulberg Pereira Talita da Silva Miranda Bárbara rodrigues Geraldino de Andrade Luiz Antonio d’Avila Chemistry School/Federal University of Rio de Janeiro (EQ/UFRJ) Rio de Janeiro Brazil National Institute for Quality Control in Health/Oswaldo Cruz Foundation (INCQS/FIOCRUZ) Rio de Janeiro Brazil University Centre of Barra Mansa (UBM) Barra Mansa Brazil National of Institute of Cancer (INCA) Rio de Janeiro Brazil

The occurrence of antimicrobials in the aquatic environment and drinking water has raised the question of their impact on the environment and public health. Animal production is one of the most expressive activities of Brazilian agribusiness. In order to ensure the productivity and competitiveness of the sector, the use of drugs for therapeutic and prophylactic purposes is a common practice. Due to the continuous release of antimicrobials into the environment, the aim of this study was to compare the frequency of detection of tetracyclines and sulfonamides in surface water collected from rural areas in Lidice District of Rio Claro, in the State of Rio de Janeiro, Brazil. An investigative study was conducted with 24 river water samples analyzed by high-performance liquid chromatography coupled to tandem mass spectrometry and the aim of this study was to determine residues of sulfonamides and tetracyclines based on the USEPA method 1694. The results indicated the presence of sulfamethoxazole and oxytetracycline concentrations at the ng·L-1 level. The applied method showed overall good performance with recoveries above 57%, method detection limits ≤ 7.17 ng·L-1, method quantification limits ≤ 23.90 ng·L-1 and good linearity.

关键词： Antimicrobial LC-MS/MS Surface Water Sulfonamides Tetracyclines

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