Introduction: The correlation between team climate and job satisfaction has been studied by researchers worldwide, but only a handful of them have dealt with the reality of Intensive Care Units (ICU). Team climate can contribute to nurses’ job satisfaction, thus increasing their efficiency and effectiveness. Especially during a pandemic, such as Covid-19, the investigation of team climate and job satisfaction is of great importance.Purpose: The purpose of this study was to investigate the correlation between team climate and job satisfaction of nurses in ICU and among the fear of Covid-19.Methodology: This is a contemporary study. The sample of the study is consisted of nurses and nurses’ assistants of a Greek public hospital ICU and special units. The Anderson & West Team Climate Inventory (TCI), the Paul E. Spector Job Satisfaction and the Fear of COVID-19 Scale were used for data collection. The statistical analysis of the data was done with the statistical program SPSS for Windows (version 21).Results: Out of the 212 nurses, 170 responded to the questionnaire (response rate 80.2%). The team climate was generally described as moderate. Especially, the dimensions of communication-innovation, team goals and the way they work assessed as moderate. Job satisfaction was described as moderate. Relationships with the manager, the nature of the work and communication, characteristics of job satisfaction, were evaluated with a high score, while payment, benefits and promotion were evaluated with low score. The fear of Covid-19 scale had low score, indicating that the feeling of fear was at low levels.Conclusions: The team climate and job satisfaction of ICUs nurses of the hospital was characterized as moderate, while the fear levels due to Covid-19 were low. Furthermore, the team climate was positively correlated with job satisfaction. In contrast, neither team climate nor job satisfaction were associated with fear of Covid-19.

Artificial light at night (ALAN) is increasingly recognised as a disruptive form of environmental pollution, impacting many physiological and behavioural processes that may scale up to population and community-level effects. Mounting evidence from animal studies show that the severity and type of the impact depends on the wavelength and intensity of ALAN. This knowledge has been instrumental for informing policy-making and planning for wildlife-friendly illumination. However, most of this evidence comes from terrestrial habitats, while research testing alternative wavelength illumination in marine environments is lagging behind. In this study we investigated the effect of such alternative ALAN colours on marine primary producers. Specifically, we tested the effect of green, red, and natural white LED illumination at night, compared to a dark control, on the growth of a green microalgae as well as the biomass, diversity and composition of a phytoplankton assemblage. Our findings show that green ALAN boosted chlorophyll production at the exponential growth stage, resulting in higher biomass production in the green algae Tetraselmis suesica. All ALAN wavelengths affected the biomass and diversity of the assemblage with the red and green ALAN having the stronger effects, leading to higher overall abundance and selective dominance of specific diatom species compared to white ALAN and the dark control. Synthesis. Our work indicates that the wavelength of artificial light sources in marine areas should be carefully considered in management and conservation plans. In particular, green and red light should be used with caution in coastal areas, where there might be a need to strike a balance between the strong effects of green and red light on marine primary producers with the benefit they bring to other organisms.

Artificial light at night (ALAN) is a disruptive form of pollution, impacting physiological and behavioural processes that may scale up to population and community levels. Evidence from terrestrial habitats show that the severity and type of impact depend on the wavelength and intensity of ALAN; however, research on marine organisms is still limited. Here, we experimentally investigated the effect of different ALAN colours on marine primary producers. We tested the effect of green (525 nm), red (624 nm) and broad-spectrum white LED ALAN, compared to a dark control, on the green microalgae Tetraselmis suesica and a diatom assemblage. We show that green ALAN boosted chlorophyll production and abundance in T. suesica . All ALAN wavelengths affected assemblage biomass and diversity, with red and green ALAN having the strongest effects, leading to higher overall abundance and selective dominance of specific diatom species, some known to cause harmful algal blooms. Our findings show that green and red ALAN should be used with caution as alternative LED colours in coastal areas, where there might be a need to strike a balance between the effects of green and red light on marine primary producers with the benefit they appear to bring to other organisms.

Artificial light at night (ALAN) is one of the most widespread forms of environmental pollution. Studies on terrestrial organisms have shown that the effects of ALAN can be pervasive, and importantly, can depend on the colour (i.e., wavelength) of light. ALAN also affects marine environments as it is present in more than 22% of the world's coastlines and can reach depths of up to 100m. However, the impact of different colour ALAN on coastal marine organisms is under-investigated. In this study, we tested the effects of different ALAN colours on Mytilus edulis, a widespread coastal bivalve known for its high phytoplankton clearance capacity amongst other valuable ecosystem services. Using a lab-based valvometry system, we recorded the impact of red, green, and white ALAN on gaping activity patterns and phytoplankton clearance capacity of individual mussels and compared these to dark night control. Mussels exhibited a semi-diel activity pattern in both proportion of time open and gaping frequency. Although ALAN did not have significant effects on the proportion of time open it did significantly affect the gaping frequency. This effect was colour-specific with red and white ALAN resulting in lower activity compared to the dark night control but there were no effects on the phytoplankton consumption. Under green light, however, mussels showed a higher gaping frequency and reduced phytoplankton consumption with increasing time spent open compared to the other ALAN treatments and the dark control. Our findings suggest that ALAN does have colour-specific effects on mussels and indicate the importance of further investigating the physiological mechanisms behind these patterns, and their potential ecological consequences.