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Effect of temperature cycles on the sleep-like state in Hydra vulgaris.
Zoological Lett
January 2025
Faculty of Arts and Science, Kyushu University, Fukuoka, 819-0395, Japan.
Background: Sleep is a conserved physiological phenomenon across species. It is mainly controlled by two processes: a circadian clock that regulates the timing of sleep and a homeostat that regulates the sleep drive. Even cnidarians, such as Hydra and jellyfish, which lack a brain, display sleep-like states.
View Article and Find Full Text PDFHeatstroke characteristics and meteorological conditions in Hefei, China: thresholds and driving factors.
BMC Public Health
January 2025
Key Laboratory of Cities Mitigation and Adaptation to Climate Change in Shanghai (CMACC), Shanghai, 200092, China.
Background: Due to climate change and rapid urbanization, the frequency of heatwave events in East China has increased considerably since the 21st century, which has a considerable influence on human health, such as heatstroke. However, few studies have been conducted in this region on the relationship between heatstroke and meteorological conditions. To address this point, this study aimed to analyze the characteristics of heatstroke and their relationship with meteorological conditions in Hefei, China.
View Article and Find Full Text PDFLong-term impacts of salinity and temperature changes on Brachionus calyciflorus populations: understanding the role of intraspecific variability.
Environ Sci Pollut Res Int
January 2025
CESAM & Department of Biology, University of Aveiro, 3810-193, Aveiro, Portugal.
Worldwide, many coastal freshwater ecosystems suffer from seawater intrusion. In addition to this stressor, it is likely that the biota inhabiting these ecosystems will also need to deal with climate change-related temperature fluctuations. The resilience of populations to long-term exposure to these stressors will depend on their genetic diversity, a key for their adaptation to changing environments.
View Article and Find Full Text PDFEffects of 24-h sleep deprivation on whole-body heat exchange in young men during exercise in the heat.
Eur J Appl Physiol
January 2025
Human and Environmental Physiology Research Unit, School of Human Kinetics, University of Ottawa, 125 University, Montpetit Hall, Room 367, Ottawa, ON, Canada.
Sleep deprivation has been associated with impaired thermoregulatory function. However, whether these impairments translate to changes in whole-body heat exchange during exercise-heat stress remains unknown. Therefore, following either a night of normal sleep or 24 h of sleep deprivation, 10 young men (mean (SD): 23 (3) years) completed three 30-min bouts of semi-recumbent cycling at increasing fixed rates of metabolic heat production (150, 200, 250 W/m), each separated by a 15-min rest in dry heat (40 °C, ~ 13% relative humidity).
View Article and Find Full Text PDFBetula pendula Roth. survival and growth in treeline is affected by genotype and environment.
Sci Rep
January 2025
Department of Biology, University of Turku, 20014, Turku, Finland.
Alpine and Arctic treelines are assumed to be shifting toward higher latitudes and altitudes as a consequence of climate warming. Here, we compared the survival and growth of 1264 silver birch (Betula pendula Roth.) trees representing nine half-sib families.
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