青少年Liolaemus arambarensis对实验温度变化的生态生理反应
Artur Antunes Navarro Valgas1, Gustavo Kasper Cubas1, Diogo Reis de Oliveira1
1Universidade Federal do Rio Grande do Sul, Departamento de Zoologia, Laboratório de Herpetologia, Bento Gonçalves Avenue, 9500 Pd. 43435, Block IV, class 102, Campus do Vale, 91510-000, Porto Alegre, RS, Brazil; Pontifícia Universidade Católica do Rio Grande do Sul, Escola de Ciências da Saúde e da Vida, Laboratório de Fisiologia da Conservação, Ipiranga Avenue, 6681 Pd. 12, Block C, class 250, 90619-900, Porto Alegre, RS, Brazil.
概括
气候变化影响了像Liolaemus arambarensis这样的外热动物. 突然的温度变化会破坏平衡,增加氧化应激和皮质,可能阻碍生存和繁殖.
科学领域:
- 生态学和进化生物学
- 生理学和新陈代谢
- 气候变化生物学 气候变化生物学
背景情况:
- 气候变化对生物多样性构成重大威胁,特别是影响依赖环境温度的外热生物.
- 了解温度变化的影响对于评估对ectotherm恒温和生存的影响至关重要.
- 一种外热动物Liolaemus arambarensis可以作为研究热应激反应的模型.
研究的目的:
- 描述青少年Liolaemus arambarensis对温度突然变化的生理和代谢反应.
- 量化身体状况的生物标志物,中间和荷尔蒙代谢,以及在热应激下氧化平衡.
主要方法:
- 青少年Liolaemus arambarensis被收集 (n=45) 并暴露在急性温度变化 (10°C,20°C,30°C,40°C) 中24小时.
- 包括糖原,总蛋白质,抗氧化酶 (乙胆化酶,超氧化物脱酶,甲酶,谷氨-S转移酶),脂氧化和血皮质在内的生物标志物在各种组织和血中得到量化.
- 研究了对热应激反应的季节性差异 (冬季与夏季采集).
主要成果:
- 利奥拉莫斯 (Liolaemus arambarensis) 对突然的温度波动表现出敏感性,较高的温度诱导抗氧化酶活性增加.
- 高温导致脂质过氧化增加和血皮质水平升高,特别是在冬季采集的个体中.
- 这些生理变化暗示了为了生存而动员能量资源,可能以牺牲生长和繁殖为代价.
结论:
- 急剧的温度变化严重破坏了Liolaemus arambarensis的恒温机制,导致氧化应激.
- 观察到的生理性权衡表明,即时生存和长期健康 (生长/繁殖) 之间存在潜在的冲突.
- 气候变化加剧的温度变化代表了像Liolaemus arambarensis这样的物种潜在的灭绝驱动因素.
相关概念视频
02:45Responses to Heat and Cold Stress
13.5K
Every organism has an optimum temperature range within which healthy growth and physiological functioning can occur. At the ends of this range, there will be a minimum and maximum temperature that interrupt biological processes.
13.5K
01:26Requirements for Human Life
8.2K
The Earth and its atmosphere have provided humans with air, water, and food, but these are not the only requirements for survival. Humans also require a specific range of temperature and pressure that the Earth and its atmosphere provides.
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
Oxygen
Atmospheric air is only about 20 percent oxygen, but that oxygen is a key component of the chemical reactions that keep the body alive, including the reactions that produce ATP. Brain cells are susceptible to a lack of oxygen because they require a...
8.2K
01:28Factors Affecting Body Temperature
4.2K
As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may include:
Factors may include:
4.2K
01:25Body Temperature
960
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...
960