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相关概念视频

Global Climate Change01:50

Global Climate Change

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Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.
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Threats to Biodiversity01:50

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There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
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In a population that is not at Hardy-Weinberg equilibrium, the frequency of alleles changes over time. Therefore, any deviations from the five conditions of Hardy-Weinberg equilibrium can alter the genetic variation of a given population. Conditions that change the genetic variability of a population include mutations, natural selection, non-random mating, gene flow, and genetic drift (small population size).
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A body temperature above  38°C  (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in...
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Small population sizes put a species at extreme risk of extinction due to a lack of variation, and a consequent decrease in adaptability. This weakens the chances of survival under pressures such as climate change, competition from other species, or new diseases. Large populations are more likely to survive pressures such as these, as such populations are more likely to harbor individuals that have genetic variants that are adaptive under new stresses. Small populations are much less...
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相关实验视频

Updated: May 17, 2025

Tissue Collection of Bats for -Omics Analyses and Primary Cell Culture
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气候变化带来的热浪对新生森林蝙蝠构成致命的风险.

Danilo Russo1, Anne Mäenurm2, Luca Cistrone1

  • 1Laboratory of Animal Ecology and Evolution (AnEcoEvo), Dipartimento di Agraria Università degli Studi di Napoli Federico II Napoli Italy.

Ecology and evolution
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概括

热浪正在导致温带森林蝙蝠的死亡,比如常见的夜 (Nyctalus noctula). 分裂的森林可能会增加蝙蝠对热应激的脆弱性,并充当生态陷.

关键词:
蝙蝠 蝙蝠 蝙蝠 蝙蝠 是一个气候变化 气候变化 气候变化生态陷的生态陷森林的森林森林的森林.热浪 热浪 热浪 热浪死亡率 死亡率

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科学领域:

  • 生态生态学 生态生态学
  • 气候变化生物学 气候变化生物学
  • 保护生物学 保护生物学

背景情况:

  • 气候变化增加了热浪等极端天气事件,对生物多样性构成风险.
  • 热应激会影响动物,特别是那些温度调节能力有限的动物.
  • 以前关于蝙蝠热浪死亡率的研究集中在飞狐和居住在城市的物种上,而不是温带森林蝙蝠.

研究的目的:

  • 展示温带森林蝙蝠中与热浪相关的死亡率的第一个证据.
  • 调查极端高温对意大利东北部常见夜 (Nyctalus noctula) 的影响.

主要方法:

  • 现场工作在意大利东北部弗里乌利-朱利雅威尼西亚的一个森林片段进行,在2023年和2024年的夏季.
  • 在热浪期间 (Tmax ≥30°C) 在树底部发现的死幼蝙蝠的识别.
  • 实验室尸体解剖以确定死亡原因,包括检查病毒感染和养证据.

主要成果:

  • 在热浪期间,发现了17只死去的幼年常见夜.
  • 尸体解剖表明与热有关的压力是死亡原因;没有检测到病毒感染.
  • 观察到的死亡率可能低估了实际影响,因为在森林环境中难以找到尸体.

结论:

  • 这项研究为温带森林蝙蝠中热浪引起的死亡率提供了第一个证据.
  • 蝙蝠种群,特别是常见的夜,容易受到热浪的影响,特别是在分散的森林息地.
  • 森林的碎片化可能会增加热应激暴露,并导致所作为蝙蝠的生态陷.