RESUMEN
Climate change is expected to warm, deoxygenate, and acidify ocean waters. Global climate models (GCMs) predict future conditions at large spatial scales, and these predictions are then often used to parameterize laboratory experiments designed to assess biological and ecological responses to future change. However, nearshore ecosystems are affected by a range of physical processes such as tides, local winds, and surface and internal waves, causing local variability in conditions that often exceeds global climate models. Predictions of future climatic conditions at local scales, the most relevant to ecological responses, are largely lacking. To fill this critical gap, we developed a 2D implementation of the Regional Ocean Modeling System (ROMS) to downscale global climate predictions across all Representative Concentration Pathway (RCP) scenarios to smaller spatial scales, in this case the scale of a temperate reef in the northeastern Pacific. To assess the potential biological impacts of local climate variability, we then used the results from different climate scenarios to estimate how climate change may affect the survival, growth, and fertilization of a representative marine benthic invertebrate, the red abalone Haliotis rufescens, to a highly varying multi-stressor environment. We found that high frequency variability in temperature, dissolved oxygen (DO), and pH increases as pCO2 increases in the atmosphere. Extreme temperature and pH conditions are generally not expected until RCP 4.5 or greater, while frequent exposure to low DO is already occurring. In the nearshore environment simulation, strong RCP scenarios can affect red abalone growth as well as reduce fertilization during extreme conditions when compared to global scale simulations.
RESUMEN
To examine whether dietary supplementation with omega-3 fatty acids from Clupeonella grimmi can relieve symptoms of dysmenorrhoea, we carried out a cross-over clinical trial on 36 girls aged 18-22 years. They were randomly allocated into 2 groups of 18. Group A received 15 mL fish oil daily (550 mg eicosapentaenoic acid; 205 mg decosahexaenoic acid) while Group B received placebo. After 3 months, the treatment regimens were swapped. The treatment groups reported a significant difference after 3 months of supplementation with fish oil (visual analogue scale score 20.9 compared with 61.8 for the placebo (P= 0.001). There was also a marked reduction in low back pain and abdominal pain (P < 0.05), and participants needed significantly fewer rescue doses of ibuprofen while using fish oil.
Asunto(s)
Suplementos Dietéticos , Ácidos Docosahexaenoicos/uso terapéutico , Dismenorrea/tratamiento farmacológico , Ácido Eicosapentaenoico/uso terapéutico , Química Farmacéutica , Distribución de Chi-Cuadrado , Estudios Cruzados , Ácidos Docosahexaenoicos/química , Método Doble Ciego , Dismenorrea/diagnóstico , Dismenorrea/psicología , Ácido Eicosapentaenoico/química , Emulsiones , Femenino , Humanos , Irán , Dimensión del Dolor , Satisfacción del Paciente , Índice de Severidad de la Enfermedad , Estadísticas no Paramétricas , Resultado del Tratamiento , Adulto JovenRESUMEN
To examine whether dietary supplementation with omega-3 fatty acids from Clupeonella grimmi can relieve symptoms of dysmenorrhoea, we carried out a cross-over clinical trial on 36 girls aged 18-22 years. They were randomly allocated into 2 groups of 18. Group A received 15 mL fish oil daily [550 mg eicosapentaenoic acid; 205 mg decosahexaenoic acid] while Group B received placebo. After 3 months, the treatment regimens were swapped. The treatment groups reported a significant difference after 3 months of supplementation with fish oil [visual analogue scale score 20.9 compared with 61.8 for the placebo [P = 0.001]. There was also a marked reduction in low back pain and abdominal pain [P < 0.05], and participants needed significantly fewer rescue doses of ibuprofen while using fish oil
