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Related Concept Videos

Thermoregulation01:26

Thermoregulation

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The human body has a sophisticated thermoregulation system that employs negative feedback mechanisms to maintain an optimal core temperature. When the core temperature drops, peripheral and central thermoreceptors send signals to the hypothalamus, activating the heat-promoting center. This center triggers several responses aimed at increasing the core temperature. First, vasoconstriction reduces the flow of warm blood from internal organs to the skin so that the heat is not lost from the skin,...
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Body Temperature01:25

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The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
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Thermosensation01:43

Thermosensation

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Peripheral thermosensation is the perception of external temperature. A change in temperature (on the surface of the skin and other tissues) is detected by a family of temperature-sensitive ion channels called Transient Receptor Potential, or TRP, receptors. These receptors are located on free nerve endings. Those detecting cold temperatures are closer to the surface of the skin than the nerve endings detecting warmth. These thermoTRP channels, while temperature selective, have relatively...
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Diversity of Archaea IV01:29

Diversity of Archaea IV

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Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
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Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

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Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
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Osmoregulation in Insects01:47

Osmoregulation in Insects

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Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
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Impedance Pneumography for Minimally Invasive Measurement of Heart Rate in Late Stage Invertebrates
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Are crabs in hot water?

Gordon H Kruse1

  • 1College of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Juneau, AK, USA.

Science (New York, N.Y.)
|October 19, 2023
PubMed
Summary

Marine heat waves pose significant challenges to managing fisheries sustainably. Understanding these impacts is crucial for the future of marine ecosystems and global food security.

Area of Science:

  • Marine biology
  • Climate science
  • Fisheries management

Background:

  • Marine heat waves (MHWs) are increasing in frequency and intensity.
  • These extreme events significantly impact marine ecosystems and biodiversity.
  • Sustainable fisheries management faces unprecedented challenges due to climate change.

Purpose of the Study:

  • To investigate the multifaceted impacts of marine heat waves on fisheries.
  • To assess the implications of MHWs for sustainable fisheries management strategies.
  • To highlight the urgent need for adaptive management approaches in the face of marine climate variability.

Main Methods:

  • Analysis of long-term fisheries data in relation to MHW events.
  • Ecological modeling to predict species distribution shifts and population dynamics.

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  • Socio-economic assessment of fisheries' vulnerability to MHWs.

    • Main Results:

    • Observed significant declines in catch per unit effort during MHWs for key commercial fish stocks.
    • Identified poleward shifts in species distribution, altering traditional fishing grounds.
    • Demonstrated increased economic vulnerability for fishing communities reliant on historically stable stocks.

    Conclusions:

    • Marine heat waves represent a critical threat to the sustainability of global fisheries.
    • Current fisheries management frameworks require adaptation to incorporate the impacts of extreme climate events.
    • Proactive and adaptive strategies are essential to ensure the resilience of marine ecosystems and fishing communities.