在Plethodon montanus的高度上对微气候条件的行为偏好.
Trevor L Chapman1, Joseph R Bidwell1
1Department of Biological Sciences, East Tennessee State University, Johnson City, Tennessee, USA.
概括
北部灰脸 salamanders 行为调节温度基于最近的条件,但始终寻求高湿度. 这种微气候选择是它们在不断变化的山地环境中生存的关键.
科学领域:
- 生态生态学 生态生态学
- 动物行为 动物行为
- 气候变化生物学 气候变化生物学
背景情况:
- 行为温度调节对于外热生物的生存至关重要,特别是面临气候变化的山地物种,如北方灰脸 (Plethodon montanus).
- 了解微息地选择至关重要,因为P. montanus种群在较高的海拔地区繁荣发展,可能是由于较低海拔地区的生理限制.
研究的目的:
- 调查P. montanus.的微型息地偏好,特别是温度和相对湿度 (RH).
- 确定海拔和季节性变化如何影响该物种的行为温度调节和寻找水分.
主要方法:
- 利用连续位置感应梯度室来评估对热和RH梯度的行为反应.
- 检查了从不同高度收集的P. montanus温度和RH偏好的季节性变化.
主要成果:
- 热偏好受到近期环境温度的影响,在高海拔的中,但不是在低海拔的中.
- 所有P. montanus个体都始终喜欢最高可用的相对湿度 (RH) 条件,无论高度或环境历史如何.
- 与热梯度相比,沙兰暴露于RH梯度时,探索时间较短,这表明它们的湿度偏好不那么灵活.
结论:
- 在P. montanus的行为温度调节受适应的影响,最近的温度起着作用.
- 对高湿度的偏好是这种物种在海拔和条件上的一致且不那么灵活的特征.
- 微气候选择,特别是对湿度的选择,是P. montanus在不断变化的环境中生存的关键行为适应.
相关概念视频
Positive and Negative Feedback Loops
19.4K
Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires maintaining an internal dynamic equilibrium:
19.4K
Background and Environment Affect Phenotype
6.6K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.6K
Epiphytes, Parasites, and Carnivores
13.1K
Plants often form mutualistic relationships with soil-dwelling fungi or bacteria to enhance their roots’ nutrient uptake ability. Root-colonizing fungi (e.g., mycorrhizae) increase a plant’s root surface area, which promotes nutrient absorption. While root-colonizing, nitrogen-fixing bacteria (e.g., rhizobia) convert atmospheric nitrogen (N2) into ammonia (NH3), making nitrogen available to plants for various biological functions. For example, nitrogen is essential for the...
13.1K
Requirements for Human Life
8.3K
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...
8.3K
What is Natural Selection?
115.5K
Natural selection is an evolutionary process in which individuals with survival-promoting traits reproduce at higher rates. These favorable traits become more common within a population or species. Naturally selected traits initially arise via random genetic mutations. In order for selection to occur, there must be variation within a population, the trait controlling the variation must be heritable, and there must be an evolutionary advantage for variation in the trait.
115.5K
Thermoregulation
1.0K
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,...
1.0K


