Factors affecting diatom dynamics in the alpine lakes of Colbricon (Northern Italy): a 10-year survey

Planktonic diatom fluctuations, their diversity and relationships with environmental variables were analyzed for ten consecutive years in Colbricon Superiore and Inferiore, two small high-mountain lakes located in the Paneveggio-Pale di S. Martino Natural Park (Trento, Italy) offering the rare opportunity to study two lakes differing only by area and volume and being in this respect in a ratio of 2:1 and 3:1 respectively. The lakes were monitored and sampled monthly, during ten ice-free periods, from 1998 to 2007, to correlate water chemical and physical characteristics with the recorded diversity and abundance of planktonic diatoms. 55 taxa of Bacillariophyceae were found, among which Cyclotella spp., Tabellaria flocculosa and Fragilaria spp. were dominant. Both chemical data and diatom community composition are consistent with well buffered mesotrophic lakes. We found statistical evidence that the development of diatoms was strongly related to the variation of water temperature. Furthermore, several different signatures of the diatom-enviroment relationships arose between the two lakes as e.g., a negative correlation between diatom development and water transparency was occurring in the larger lake only. As a result, the average diatom density recorded over the 10 years period were 1.17 fold higher than in the lower lake which corresponds to a 1.65 fold higher biomass. A size-dependent tighter response of the phytoplankton to chemical parameters appears to operate in the smaller waterbody compared to the larger one

Using a morpho-functional approach to assess phytoplankton dynamics in two adjacent high-mountain lakes: a 10-year survey

Colbricon Superiore and Inferiore are two small adjacent high-mountain lakes located in the Paneveggio Natural Park (Italy). The lakes differ by size and depth while sharing the same bedrock setting and catchment basin. Changes in the phytoplankton communities were studied over a 10-years period to individuate which environmental variables would determine the main differences in biotic assemblages across time and between the two lakes.The study was conducted with fortnightly samplings, assessing the density and biomass of algal taxa. Relationships of each of the biological variables with water temperature, pH, conductivity, transparency, water level, previous week rainfall, and relative water column stability were analyzed by correlation and regression analyses, cluster analysis, and by canonical correspondence analysis. The most significant variables resulted air temperature, hydrologic water level and pH. The smaller Colbricon Inferiore had about double the amount of phytoplankton density and biomass than did the larger Colbricon Superiore. The same lake had higher diversity and lower evenness in structure of the phytoplankton community. Notwithstanding their proximity each lake appears to follow independent species composition dynamics, however parallel patterns were interestingly revealed when data were analyzed by pooling taxa into morpho-functional groups. Morpho-functional groups (MFGs) 1b, 3a, 6b, 7a, 9b were differentially most abundant in warm periods, while 2c, 3b, 11c, 5e, 10a prevailed in cold years. MFGs 1b, 2d, 3a and 3b were more characteristic of Lake Colbricon Superiore, while Colbricon Inferiore preferentially featured MFGs 5a, 5e, 9a, 9b, 10a, 11a and 8a. The role of the meteo-climatic parameters was pointed out in driving the different patterns observed in the two lakes

Psychosocial aspects of work in mental health: an integrative review

Objetivo: Analizar las producciones científicas nacionales e internacionales que aborden los factores psicossociales envueltos en la salud del trabajador de salud mental. Método: Revisión de integración en las bases de dados Pubmed, Lilacs y Scielo. El Análisis de los datos fue realizado por la codificación y categorización de los contenidos. Resultados: Fueron analizados 13 artículos, agrupados y discutidos en tres categorías: la satisfacción e impacto con el trabajo en salud mental; calidad de vida y el sufrimiento mental del profesional y estrés en profesionales de la salud mental. Consideraciones finales: Los estudios describieron, verificaron y caracterizaron aspectos psicossociales envueltos en el trabajo en salud mental. Se espera que ese artículo aporte para la valorización de la salud del trabajador, calidad de vida, satisfacción en el trabajo y minimización del impacto del trabajo.Objective: analyze national and international scientific works regarding the psychosocial factors involved in the health of mental health workers. Method: integrative review in the PubMed, LILACS, and SciELO databases. The data were analyzed by coding and categorizing the content. Results: a total of 13 articles were analyzed, grouped, and discussed in three categories: satisfaction with and impact of working with mental health; quality of life and mental suffering of the professional; and stress in mental health professionals. Final remarks: the studies described, verified, and characterized psychosocial aspects involved in working with mental health. This article aims to contribute to the valorization of workers’ health, quality of life, and job satisfaction, as well as to the minimization of the impact of the work.Objetivo: analisar as produções científicas nacionais e internacionais que abordem os fatores psicossociais envolvidos na saúde do trabalhador de saúde mental. Método: revisão integrativa nas bases de dados Pubmed, Lilacs e Scielo. A Análise dos dados foi realizada pela codificação e categorização dos conteúdos. Resultados: foram analisados 13 artigos, agrupados e discutidos em três categorias: a satisfação e impacto com o trabalho em saúde mental; qualidade de vida e o sofrimento mental do profissional e estresse em profissionais da saúde mental. Considerações finais: os estudos descreveram, verificaram e caracterizaram aspectos psicossociais envolvidos no trabalho em saúde mental. Espera-se que esse artigo contribua para a valorização da saúde do trabalhador, qualidade de vida, satisfação no trabalho e minimização do impacto do trabalho

Esperimento di rimozione degli ammassi mucillaginosi della microalga alloctona <i>Chrysophaeum taylorii</i> Lewis &amp; Bryan = Experiment of removal of the mucilaginous aggregates by the alien microalga <i>Chrysophaeum taylorii</i> Lewis &amp; Bryan

A manipulative experiment was carried out in a small bay of Tavolara Punta Coda Cavallo Marine Protected Area in order to investigate the triggers for formation and storage of the macroscopic mucilaginous aggregates of the benthic microalga Chrisophaeum taylorii Lewis &amp; Bryan (Pelagophyceae) and to test the efficacy of mucillage removal

A 13000 year environmental history of Lake Colbricon Inferiore (Trentino, Italia)

Lake sediments have long been used as an archive for paleoclimatic-paleoenvironmental reconstructions, with more and more refined techniques developed in the late 40 years. This work is an attempt to reconstruct with a multiproxy paleolimnological technique the ecosystem response in Colbricon Inferiore, a small high-mountain lakes located in the Paneveggio-Pale di S. Martino Natural Park(Trento, Italy). A ca. 360cm long core was retrieved with a piston core; a gravity corer was used for the most recent sediment. Chronology was established by a combination of 210Pb and 14C isotopes. Diatom assemblages show changes in species composition that could be associated to an initial warm phase (Allerod), a following colder one (YD) and a progressive amelioration of climate until the optimum (8500-3500). During the transition period (10000-8000) carotenoids point out to an increase of cyanobacteria (Echinenone and myxoxanthophyll) associated with an increase of fire frequency and the first settlement around Lake Colbricon. Along the climatic optimum, algal pigment are rather stable and Chryptophytes (alloxanthin) are well represented pointing to a high and stable water level. Diatom assemblages are dominated by the planktonic Discostella stelligeroides. At ca. 3500 yrs. B.P., a new phase begins with a decrease of D. stelligeroides and an increase of the small benthic fragilariaceae (Staurosira and Pseudostaurosira species) typical of cold-water conditions. At this level, there is a general increase of carotenoids and a shift in the ratio CD:TC. This suggest, rather than an increase in productivity, a change in the preservation conditions associated with the worsening of climate. After 2000 cal yr BP the lake seems quite stable: diatom assemblages are dominated by Staurosira and Pasudostaurosira species. Algal pigment are also quite stable apart myxoxanthophyll that increase in the more recent phase

Diagrammatic scale for evaluation of Bremia lactucae sporulation in lettuce seedlings

ABSTRACT In disease assessment, the use of diagrammatic scales provides a standard reference point for comparison. There is still no precise and accurate scale for the evaluation of sporulation intensity of downy mildew in lettuce seedlings. The objective of this study was to propose a diagrammatic scale for the evaluation of downy mildew severity in lettuce seedlings. Thirty lettuce seedlings with different sporulation intensities were used to develop the proposed diagrammatic scale. Solaris lettuce cultivar was sown, and fifteen days after sowing, inoculations occurred using distilled water, the pathogen sporangia, and Tween 20. The monitoring of disease development was performed daily.When the first sporulation appeared on the cotyledonaryleaves,the proposed scale was verified to meet the minimum and maximum levels of disease severity. Two evaluators verified the accuracy, precision and performed the estimation of the sporulation and reproducibility using a scale. The images obtained are important in the standardization of a scale to identify resistant, tolerant and susceptible plants to downy mildew. Furthermore, it allows validating a diagrammatic scale of sporulation intensity of B. lactucae in lettuce seedlings. Thus, it is the diagrammatic scale developed in the work will guide future research to accelerate the detection of mildew severity in lettuce seedlings

Síndrome de burnout, estresse ocupacional e qualidade de vida entre trabalhadores de enfermagem

Objective: To analyze the prevalence of burnout syndrome and its correlation with occupational stress and quality of life among nursing workers. Method: Cross-sectional study addressing 502 nursing professionals from a philanthropic general hospital in the South of Brazil. Data were collected using an instrument addressing sociodemographic, occupational, and lifestyle characteristics, the Maslach Burnout Inventory, the Demand-Control-Support Questionnaire and the World Health Organization Quality of Life – WHOQOL-Bref. Data were analyzed using descriptive and inferential statistics by using Spearman’s rank correlation coefficient. Results: The prevalence of burnout syndrome was 20.9% and its dimensions were related to high demand, low control over work, low social support at work, and negative perceptions of physical, psychological, and social quality of life and of the work environment.Conclusion: Burnout syndrome was related to high levels of stress and a negative perception of quality of life among nursing workers.Objetivo: Analizar la ocurrencia del síndrome de Burnout y su relación con el estrés laboral y la calidad de vida entre trabajadores de enfermería. Método: Se trata de un estudio transversal realizado entre 502 profesionales de enfermería de un hospital general filantrópico de la región sur de Brasil. Los datos se recogieron mediante instrumento con preguntas de caracterización sociodemográfica, ocupacional y de hábitos de vida, el Maslach Burnout Inventory, el Demand-Control-Support Questionnaire y l World Health Organization Quality of Life - Bref.WHOQOL-BREF. Los datos se analizaron por medio de estadística descriptiva e inferencial, en la que se utilizó el coeficiente de correlación de Spearman. Resultados: La ocurrencia del síndrome de burnout fue del 20,9% y sus dimensiones estaban relacionadas con la alta demanda, el bajo control sobre el trabajo, el poco apoyo social recibido en el trabajo, menores percepciones de la calidad de vida física, psicológica, de las relaciones sociales y del medio ambiente. Conclusión: El síndrome de Burnout estaba relacionado con altos niveles de estrés y a la percepción negativa de la calidad de vida de los trabajadores de enfermería.Objetivo: Analisar a ocorrência da síndrome de burnout e sua correlação com o estresse ocupacional e a qualidade de vida entre trabalhadores de enfermagem. Método: Estudo transversal realizado com 502 profissionais de enfermagem de um hospital geral filantrópico da Região Sul do Brasil. Os dados foram coletados por meio de um instrumento com questões de caracterização sociodemográfica, ocupacional e de hábitos de vida, o Maslach Burnout Inventory, o Demand-Control-Support Questionnaire e o World Health Organization Quality of Life - Bref. Os dados foram analisados por estatística descritiva e inferencial, em que utilizou-se o coeficiente de correlação de Spearman. Resultados: A ocorrência de síndrome de burnout foi de 20,9% e suas dimensões relacionaram-se a alta demanda, baixo controle sobre o trabalho, baixo apoio social recebido no trabalho, menores percepções da qualidade de vida física, psicológica, das relações sociais e do meio ambiente. Conclusão: A síndrome de burnout esteve correlacionada aos altos níveis de estresse e à percepção negativa de qualidade de vida dos trabalhadores de enfermagem

Prova em dupla e com consulta em aulas de Cálculo? Agora ficou fácil tirar 10!

Neste trabalho, baseados em uma perspectiva de avaliação que tem a função primeira da regulação da aprendizagem, discutimos o desenvolvimento de uma prática avaliativa que utiliza o instrumento prova-escrita-com-consulta-ao-caderno. Trata-se de uma pesquisa qualitativa, de cunho interpretativo, que apresenta e discute potencialidades desse instrumento avaliativo para uma avaliação da aprendizagem que fomenta os processos de regulação do ensino e da aprendizagem em aulas de Cálculo Diferencial e Integral (CDI), organizadas em um ambiente pautado em episódios de resolução de tarefas. A prática avaliativa foi desenvolvida em turmas de CDI 3 do curso de Engenharia de Materiais da Universidade Tecnológica Federal do Paraná – UTFPR, câmpus Londrina, no ano de 2019. A análise realizada evidenciou que a prova-escrita-com-consulta-ao-caderno é recurso para uma prática que busca articular o caráter formativo e o somativo da avaliação, sendo de fácil adaptação em relação ao corriqueiro instrumento prova escrita. Além disso, destacamos que o instrumento em si não possui uma natureza formativa ou somativa, mas o modo que o professor planeja, executa e envolve os alunos nessa prática avaliativa tem influência direta aos propósitos e decisões pedagógicas que as informações recolhidas por meio dele irão gerar