Sazonalidade na nidificação de abelhas e vespas solitárias em ninhos-armadilha em área de Caatinga

Solitary bees and wasps that nidify in preexisting cavities were systematically surveyed from august 2004 to august 2006, by means of trap-nests technique, at the Estação Ecológica do Seridó, Serra Negra do Norte, Rio Grande do Norte, Northeastern Brazil. Ten wooden blocks with 32 openings each, at 1.5 m above ground, with cardboard trap-nests of 4, 6, 9 and 12 mm of diameter, were placed, and inspected every 15 days. The blocks were installed in two landscape extremes points of semi-arid region, dry localities, without water storage, and near water bodies, with available water in dry station and associated vegetation. 368 nests were collected, 52 from nine species of bees, 243 from nine species of wasps. 73 nests were attacked by twelve species of parasites. In general, the number of nests of bees and wasps suffered significant reduction within during dry seasons. There was no record of diapause for bees but some wasp individuals of Trypoxylon lenkoi and T. sp.4 presented a delayed emergency of adults. This occasional diapause must be important for the population dynamics of these insects in the Caatinga region.A estrutura da guilda de abelhas e vespas solitárias que nidificam em cavidades pré-existentes foi sistematicamente investigada na Estação Ecológica do Seridó, Serra Negra do Norte, RN, no período de agosto de 2004 a agosto de 2006, por meio da técnica de amostragem em ninhos-armadilha. Dez blocos de madeira, com 32 orifícios, ocupados com tubos de cartolina com 4, 6, 9 ou 12 mm de diâmetro, foram instalados a 1,5 m do solo e inspecionados quinzenalmente. Os pontos de amostragem foram definidos considerando duas condições ecológicas extremas dentro da paisagem do semi-árido, locais secos, sem armazenamento de água nas proximidades, e locais próximos a açudes, com água livre disponível mesmo durante a estação seca. Foram coletados 368 ninhos, sendo 52 de nove espécies de abelhas e 243 de nove espécies de vespas. 73 ninhos foram parasitados por doze espécies de parasitas. Ocorreram diminuições no número de ninhos de abelhas e vespas coletados nos períodos secos nos dois anos estudados quando comparado aos períodos chuvosos. Não houve registro de diapausa para abelhas, mas alguns indivíduos de vespas das espécies Trypoxylon lenkoi e T. sp.4 apresentaram um prolongado período para emergência de adultos. Essa diapausa eventual deve ter importância fundamental na dinâmica populacional das espécies de abelhas e vespas solitárias da Caatinga

Estimativa de potencial energético de biogás proveniente do aterro sanitário Tijuquinhas (município de Biguaçu/SC)

Most solids waste in Brazil is disposed improperly, causing environmental, social and public health impacts. Methane, a product of anaerobic degradation of MSW, is considered to be an impactful greenhouse gas. This gas, burned or recycled properly in landfills for power generation, can bring financial returns for the company administrator, while minimizing environmental impacts. The objective of this study was to analyze the energy potential of landfill Biguaçu/SC using the methodologies proposed by the IPCC for theoretical estimation of biogas production. It was found that the landfill Biguaçu has high capacity power generation by exploiting methane, with a maximum potential of 5.26 MW in 2019, a year after the closure of the landfill.A maior parte dos resíduos sólidos urbanos (RSU) no Brasil é disposta de maneira inadequada, provocando impactos ambientais, sociais e de saúde pública. O metano, produto da degradação anaeróbia dos RSU, é considerado impactante por ser um gás de efeito estufa. Este gás, queimado ou aproveitado corretamente em aterros sanitários, para geração de energia, pode trazer retorno financeiro para a empresa administradora, além de minimizar impactos ambientais.  O objetivo deste trabalho foi analisar o potencial energético do aterro sanitário de Biguaçu/SC utilizando as metodologias propostas pelo IPCC para estimativa teórica de produção de biogás. Constatou-se que o aterro de Biguaçu possui alta capacidade de geração de energia através do aproveitamento de metano, com potencial máximo de 5,26 MW em 2019, um ano após o encerramento do aterro

Heavy Metal Poisoning in a Cockatiel (Nymphicus hollandicus)

Background: In recent decades the demand for unconventional pets has been relatively increasing, a situation that increasingly causes veterinarians to encounter these animals in medical and surgical practice. Of these animals, the birds stand out. Animals of the order Psittaciform are known as very curious and active creatures that have the tendency to chew objectsin their environment. Among the several occurrences that lead this animal to attend the veterinary clinic, we highlight the poisoning by heavy metals, especially lead poisoning (Pb) and zinc (Zn). The objective of this work was to report a case of heavy metal intoxication in cockatiel (Nymphicus hollandicus).Case: A cockatiel was taken to the veterinarian with a history of apathy, motor incoordination, exacerbated water consumption and regurgitation. Complete anamnesis was instrumental in directing suspected heavy metal intoxication. Radiopaque particles were visualized through radiographic examination, suggesting heavy metal intoxication. The diagnosis wasconcluded through complementary examinations since the clinical symptoms are nonspecific. The treatment was intended to provide emergency intervention, avoid further absorption, use of antidotes, provide supportive measures and provide guidance to the owner. It can be concluded that the diagnosis and treatment were successful.Discussion: Metal poisoning can kill birds. The veterinarian should always seek the literature in order to perform the best support and treatment. For this, detailed history and detailed medical history must be taken into account, since the time of ingestion and the type of metal interfere with the therapeutic conduct. The use of imaging tests such as x-rays andultrasound are essential to assist the clinician, especially in cases where the tutor does not know whether or not the animal has ingested an object. In the radiographic examination, the heavy metal has the characteristic of having high radiopacity, which was evidenced in the case in question. Radiographic positions should be considered in order to avoid false negatives. In the literature, the treatment of chelation therapy is prioritized to remove the circulating heavy metal and thus act on the cause of the problem. In the case in question calcium EDTA was used intramuscularly, which showed clinical improvement in the animal after the second application. Calcium EDTA binds to metals and facilitates their transport and excretion. The use of fluid therapy is necessary as a supportive treatment to prevent kidney damage, since heavy metals are highlyharmful to nephrons. Especially in cases where the animal stops feeding and ingesting water. The use of antibiotics is essential because in many cases the animal, in addition to not feeding, becomes prone to infections due to metal toxicity, therefore, prophylactic use is essential for a better prognosis. In the case in question, the use of enrofloxacin was effective,as reported in the literature. It is recommended that the diagnosis of serum lead and zinc dosage should be made, however, due to the difficulties of obtaining the samples, and since other metals may also cause intoxication, in the case in question the treatment was started without these results. According to the results obtained in this work, the treatment described in the literature is effective and can be performed immediately to save animal life without subsequent sequelae.Keywords: bird, lead, zinc, calcium EDTA

Casos de estudio en México y Latinoamérica

Ante la presencia de conflictos sociales y territoriales, las comunidades organizadas buscan estrategias de solución y confrontación. Es el estudio de dichos movimientos, lo que motiva a la publicación de éste libro: Respuestas comunitarias ante conflictos ambientales. Casos de estudio en México y Latinoamérica, reúne catorce textos que analizan las respuestas sociales y documentan la acción colectiva de comunidades que se han organizado para autogestionar soluciones ante conflictos territoriales, económicos y ambientales, en su propio entorno. Las aportaciones de investigadores y activistas, desde enfoques teóricos y metodológicos particulares, exponen casos de estudio sobre organizaciones formales e informales que se han conformado para afrontar los retos que representan proyectos productivos como fábricas cementeras, mineras, puertos, productores de energía, entre otros. Los enfoques analíticos tocan también temas nodales en el estudio de la acción colectiva como la ética, el despojo, los derechos humanos y las estrategias de comunicación y visibilización. Este material, que reúne estudios hechos en distintos lugares de México y Latinoamérica, es un compendio de métodos de investigación y un acercamiento al estudio de los movimientos sociales.UAEMEX, CONACyT, SE

High Prevalence of Multidrug-Resistant Klebsiella pneumoniae Harboring Several Virulence and β-Lactamase Encoding Genes in a Brazilian Intensive Care Unit

Klebsiella pneumoniae is an important opportunistic pathogen that commonly causes nosocomial infections and contributes to substantial morbidity and mortality. We sought to investigate the antibiotic resistance profile, pathogenic potential and the clonal relationships between K. pneumoniae (n = 25) isolated from patients and sources at a tertiary care hospital’s intensive care units (ICUs) in the northern region of Brazil. Most of K. pneumoniae isolates (n = 21, 84%) were classified as multidrug resistant (MDR) with high-level resistance to β-lactams, aminoglycosides, quinolones, tigecycline, and colistin. All the 25 isolates presented extended-spectrum beta-lactamase-producing (ESBL), including carbapenemase producers, and carried the blaKPC (100%), blaTEM (100%), blaSHV variants (n = 24, 96%), blaOXA-1 group (n = 21, 84%) and blaCTX-M-1 group (n = 18, 72%) genes. The K2 serotype was found in 4% (n = 1) of the isolates, and the K1 was not detected. The virulence-associated genes found among the 25 isolates were mrkD (n = 24, 96%), fimH-1 (n = 22, 88%), entB (100%), iutA (n = 10, 40%), ybtS (n = 15, 60%). The genes related with efflux pumps and outer membrane porins found were AcrAB (100%), tolC (n = 24, 96%), mdtK (n = 22, 88%), OmpK35 (n = 15, 60%), and OmpK36 (n = 7, 28%). ERIC-PCR was employed to determine the clonal relationship between the different isolated strains. The obtained ERIC-PCR patterns revealed that the similarity between isolates was above 70%. To determine the sequence types (STs) a multilocus sequence typing (MLST) assay was used. The results indicated the presence of high-risk international clones among the isolates. In our study, the wide variety of MDR K. pneumoniae harboring β-lactams and virulence genes strongly suggest a necessity for the implementation of effective strategies to prevent and control the spread of antibiotic resistant infections

Tendências Promissoras: O Papel dos Inibidores do SGLT2 no Tratamento da Diabetes Tipo 2 e seus Impactos Cardiovasculares

This study reviewed the role of sodium-glucose cotransporter 2 (SGLT2) inhibitors in the treatment of type 2 diabetes and their cardiovascular impacts. Through the analysis of clinical studies, including those conducted with empagliflozin, canagliflozin, dapagliflozin, and ertugliflozin, a significant reduction in the risk of adverse cardiovascular events was observed in patients treated with these medications. Additionally, SGLT2 inhibitors were associated with additional benefits, such as reducing the progression of renal disease and hospitalization for heart failure. However, further research is needed to fully understand the mechanisms of action of these medications and their potential long-term adverse effects. In summary, SGLT2 inhibitors represent an important therapeutic option in the management of type 2 diabetes, offering additional cardiovascular and renal benefits beyond glycemic control.Este trabalho revisou o papel dos inibidores do cotransportador de sódio-glicose 2 (SGLT2) no tratamento da diabetes tipo 2 e seus impactos cardiovasculares. A partir da análise de estudos clínicos, incluindo aqueles conduzidos com empagliflozina, canagliflozina, dapagliflozina e ertugliflozina, observou-se uma redução significativa do risco de eventos cardiovasculares adversos em pacientes tratados com esses medicamentos. Além disso, os inibidores do SGLT2 foram associados a benefícios adicionais, como a redução da progressão da doença renal e da hospitalização por insuficiência cardíaca. No entanto, são necessárias mais pesquisas para compreender completamente os mecanismos de ação desses medicamentos e seus potenciais efeitos adversos a longo prazo. Em resumo, os inibidores do SGLT2 representam uma importante opção terapêutica no manejo da diabetes tipo 2, oferecendo benefícios cardiovasculares e renais adicionais além do controle glicêmico

Pervasive gaps in Amazonian ecological research

Biodiversity loss is one of the main challenges of our time,1,2 and attempts to address it require a clear un derstanding of how ecological communities respond to environmental change across time and space.3,4 While the increasing availability of global databases on ecological communities has advanced our knowledge of biodiversity sensitivity to environmental changes,5–7 vast areas of the tropics remain understudied.8–11 In the American tropics, Amazonia stands out as the world’s most diverse rainforest and the primary source of Neotropical biodiversity,12 but it remains among the least known forests in America and is often underrepre sented in biodiversity databases.13–15 To worsen this situation, human-induced modifications16,17 may elim inate pieces of the Amazon’s biodiversity puzzle before we can use them to understand how ecological com munities are responding. To increase generalization and applicability of biodiversity knowledge,18,19 it is thus crucial to reduce biases in ecological research, particularly in regions projected to face the most pronounced environmental changes. We integrate ecological community metadata of 7,694 sampling sites for multiple or ganism groups in a machine learning model framework to map the research probability across the Brazilian Amazonia, while identifying the region’s vulnerability to environmental change. 15%–18% of the most ne glected areas in ecological research are expected to experience severe climate or land use changes by 2050. This means that unless we take immediate action, we will not be able to establish their current status, much less monitor how it is changing and what is being lostinfo:eu-repo/semantics/publishedVersio

Ibicaba revisitada outra vez: espaço, escravidão e trabalho livre no oeste paulista

Ibicaba Farm, property of Senator Nicolau Pereira de Campos Vergueiro during the 19th century, was the subject of studies that focused on the experience with the sharecropping system. This article intends to undertake a revisit to Ibicaba through new lenses of observation. At first, it tries to insert Vergueiro's farm in the context of the changing World-economy of the first decades of the nineteenth century, and then highlight the importance of the spatial dimension of reality in this historical context. In the following two subitems, which constitute the core of the article, an analysis is made of the protocols - especially spatial - of control of the workers, used by the Vergueiros in order to extract the maximum of labor from slaves and sharecroppers, as well as the strategies that captives and immigrants used to escape from this surveillance. Finally, a brief recapitulation of the main points exposed and some considerations about the tensions that emerged in Ibicaba during the studied period are made.A Fazenda Ibicaba, propriedade do Senador Nicolau Pereira de Campos Vergueiro ao longo do século XIX, foi objeto de estudos que enfocaram a experiência com o sistema de parceria que ela abrigou. Este artigo pretende revisitar Ibicaba por meio de novas lentes de observação. Em um primeiro momento, buscar-se-á inserir a fazenda de Vergueiro no contexto de mudança pela qual a Economia-mundo passava nas primeiras décadas do Oitocentos para, em seguida, salientar a importância que a dimensão espacial da realidade cumpria nesse contexto histórico. Nos dois subitens seguintes, que constituem o núcleo do artigo, analisam-se os protocolos - sobretudo espaciais - de controle da mão de obra utilizados pelos Vergueiro, com vistas à máxima extração de trabalho de escravos e colonos, bem como as estratégias de que cativos e imigrantes lançaram mão para escapar dessa vigilância. Faz-se, ao fim, uma breve recapitulação dos principais pontos expostos e algumas considerações sobre as tensões que emergiram em Ibicaba durante o período estudado