scholarly journals The role of stochastic thermal environments in modulating the thermal physiology of an intertidal limpet,Lottia digitalis

2017 ◽  
Vol 220 (17) ◽  
pp. 3072-3083 ◽  
Author(s):  
Madeline J. Drake ◽  
Nathan A. Miller ◽  
Anne E. Todgham
Keyword(s):  
Thermal Physiology ◽  
Thermal Environments ◽  
Intertidal Limpet

scholarly journals Sports health quantification method and system implementation based on multiple thermal physiology simulation

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Yayun Zhu ◽  
Sanaa Sharaf ◽  
Basel Jamal Ali
Keyword(s):  
Rating Scale ◽  
Thermal Environment ◽  
Physiological State ◽  
Exercise Group ◽  
Thermal Physiology ◽  
Heat Stress Response ◽  
Physiological Indicators ◽  
Thermal Environments ◽  
Hot Environment ◽  
Highly Correlated

Abstract People exercising under high ambient temperature will cause changes in physiological indicators. In order to study the thermal physiological state of the human body, we randomly selected 18 volunteers into the thermal environment exercise group and the room temperature exercise group. Two groups of volunteers performed aerobic exercises in different thermal environments. In the case of exercise performed every 15 min, the volunteers’ hemorheology, physical performance rating (RPE) value and rectal temperature (Tre) were tested. At the same time, we recorded the physiological indicators of the volunteers and simulated the thermal physiology. The results showed that there was a difference in the thermal physiology of the two groups of volunteers, and the hemorheology and the self-strain rating scale were highly correlated in the thermal environment (r=0.839, P<0.01). For this reason, we can conclude that exercising in a hot environment will make people have a heavier heat stress response, and thus render them more likely to undergo muscle fatigue. It is advised that exercising at high temperatures may be avoided as much as possible.

scholarly journals Physiological niche and geographical range in European diving beetles (Coleoptera: Dytiscidae)

2016 ◽  
Vol 12 (6) ◽  
pp. 20160130 ◽  
Author(s):  
Rebekah Cioffi ◽  
A. John Moody ◽  
Andrés Millán ◽  
Richard A. Billington ◽  
David T. Bilton
Keyword(s):  
Geographical Range ◽  
Energy Reserves ◽  
Thermal Physiology ◽  
Combine Data ◽  
Thermal Environments ◽  
Metabolic Plasticity ◽  
Thermal Niche ◽  
Physiological Processes ◽  
Diving Beetles ◽  
Latitudinal Range

Geographical ranges vary greatly in size and position, even within recent clades, but the factors driving this remain poorly understood. In aquatic beetles, thermal niche has been shown to be related to both the relative range size and position of congeners but whether other physiological parameters play a role is unknown. Metabolic plasticity may be critical for species occupying more variable thermal environments and maintaining this plasticity may trade-off against other physiological processes such as immunocompetence. Here we combine data on thermal physiology with measures of metabolic plasticity and immunocompetence to explore these relationships in Deronectes (Dytiscidae). While variation in latitudinal range extent and position was explained in part by thermal physiology, aspects of metabolic plasticity and immunocompetence also appeared important. Northerly distributed, wide-ranging species apparently used different energy reserves under thermal stress from southern endemic congeners and differed in their antibacterial defences. This is the first indication that these processes may be related to geographical range, and suggests parameters that may be worthy of exploration in other taxa.

scholarly journals Thermal physiology and thermoregulatory behaviour exhibit low heritability despite genetic divergence between lizard populations

2018 ◽  
Vol 285 (1878) ◽  
pp. 20180697 ◽  
Author(s):  
Michael L. Logan ◽  
John David Curlis ◽  
Anthony L. Gilbert ◽  
Donald B. Miles ◽  
Albert K. Chung ◽  
...  
Keyword(s):  
Thermal Performance ◽  
Genetic Divergence ◽  
Common Garden ◽  
Response To Selection ◽  
Thermal Physiology ◽  
Evolutionary Potential ◽  
Thermal Environments ◽  
Performance Curves ◽  
Brown Anole ◽  
Thermoregulatory Behaviour

Ectothermic species are particularly sensitive to changes in temperature and may adapt to changes in thermal environments through evolutionary shifts in thermal physiology or thermoregulatory behaviour. Nevertheless, the heritability of thermal traits, which sets a limit on evolutionary potential, remains largely unexplored. In this study, we captured brown anole lizards ( Anolis sagrei ) from two populations that occur in contrasting thermal environments. We raised offspring from these populations in a laboratory common garden and compared the shape of their thermal performance curves to test for genetic divergence in thermal physiology. Thermal performance curves differed between populations in a common garden in ways partially consistent with divergent patterns of natural selection experienced by the source populations, implying that they had evolved in response to selection. Next, we estimated the heritability of thermal performance curves and of several traits related to thermoregulatory behaviour. We did not detect significant heritability in most components of the thermal performance curve or in several aspects of thermoregulatory behaviour, suggesting that contemporary selection is unlikely to result in rapid evolution. Our results indicate that the response to selection may be slow in the brown anole and that evolutionary change is unlikely to keep pace with current rates of environmental change.

scholarly journals The role of thermal physiology in recent declines of birds in a biodiversity hotspot

2015 ◽  
Vol 3 (1) ◽  
pp. cov048 ◽  
Author(s):  
Robyn Milne ◽  
Susan J. Cunningham ◽  
Alan T. K. Lee ◽  
Ben Smit
Keyword(s):  
Biodiversity Hotspot ◽  
Thermal Physiology

Computer Aided Design of the Thermal Environment

1989 ◽  
Vol 33 (8) ◽  
pp. 512-516 ◽  
Author(s):  
Kenneth C. Parsons
Keyword(s):  
Human Factors ◽  
Computer Aided Design ◽  
Thermal Environment ◽  
Human Response ◽  
Thermal Environments ◽  
Human Thermal Comfort ◽  
Computer Aided ◽  
Computer Based ◽  
Aided Design

The use in design, of knowledge and understanding of human thermal comfort, heat stress and cold stress, is often complex and time consuming. A computer based system (IBM-PC) was developed to allow human factors practitioners to assess and manipulate knowledge, data and simulations of human response to thermal environments, thus allowing computer aided design. A description of the system, its design and development and examples of its use are provided. The role of such systems in design and assessment should be considered by human factors practitioners.

scholarly journals MODELING OF PATIO ARCHITECTURAL SOLUTIONS AND THEIR EFFECT ON THE THERMAL COMFORT OF URBAN HOUSING IN THE SEMI-ARID CLIMATE OF ALGERIA.

2021 ◽  
Vol 6 (9) ◽  
pp. 45-55
Author(s):  
F. Bouhezam ◽  
T. Kolesnikova
Keyword(s):  
Thermal Comfort ◽  
Urban Housing ◽  
Arid Climate ◽  
Climatic Zones ◽  
Thermal Environments ◽  
Space Cooling ◽  
L Value ◽  
The Impact ◽  
Semi Arid

The article aims to substantiate the role of the patio and its effect on thermal comfort in urban housing, especially in the semi-arid climatic zones of Algeria. In semi-dry cities, the aim is always to avoid direct sunlight and to seek shade and freshness in the summer season. Indeed, the patio is one of the bioclimatic architectural devices that responds to the field of indoor thermal environments and contributes to the creation of comfortable atmosphere. In this study, authors tried to assess the impact of patio geometry on thermal comfort inside housing in the semi-arid climate of Oum El Bouaghi. The study is based on the method of mathematical modeling implemented in the program ECOTECT. It evaluates the impact of the proportional coefficient H/L (height/width) on the value of PMV (Predicted Mean Vote), and PPD (Predicted Percentage of Dissatisfied). The results of this study show that the patio plays an important role in thermal comfort in urban housing. The patio significantly improves the PMV value and reduces the PPD value, increasing sunlight in winter and providing passive space cooling in summer. However, for optimal thermal comfort, the proportional H/L value must be greater than 2.5.

Spatiotemporal variation in thermal niches suggests lability rather than conservatism of thermal physiology along an environmental gradient

2019 ◽  
Author(s):  
Anthony L Gilbert ◽  
Donald B Miles
Keyword(s):  
Environmental Gradients ◽  
Thermal Sensitivity ◽  
Population Level ◽  
Elevational Gradient ◽  
Population Variation ◽  
Model Systems ◽  
Body Temperatures ◽  
Thermal Physiology ◽  
Thermal Environments ◽  
Tree Lizard

Abstract Temperature variation throughout a species range can be extensive and exert divergent spatiotemporal patterns of selection. The estimation of phenotypic differences of populations along environmental gradients provides information regarding population-level responses to changing environments and evolutionary lability in climate-relevant traits. However, few studies have found physiological differentiation across environmental gradients attributable to behavioural thermoregulation buffering physiological evolution. Here, we compared thermal sensitivity of physiological performance among three populations of the ornate tree lizard (Urosaurus ornatus) along a 1100 m elevational gradient in southeastern Arizona across years in order to determine whether spatial differences in thermal environments are capable of driving local physiological differentiation. Lizards exhibited significant population-level differences in thermal physiology. The thermal traits of lizards at low elevations included warmer body temperatures and higher preferred and critical thermal temperatures. In contrast, lizards at higher elevations had cooler body temperatures and lower preferred and critical thermal temperatures. Populations also exhibited differences in the optimal temperature for performance and thermal performance breadth. The direction of population variation was consistent across years. Environmental gradients can provide model systems for studying the evolution of thermal physiology, and our study is one of the first to suggest that population differentiation in thermal physiology could be more prominent than previously thought.

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