epilimnion

简明释义

英[ˌepɪˈlɪmniən]美[ˌepəˈlɪmnjən]

n. [水文] 湖上层

复 数 e p i l i m n i a 或 e p i l i m n i o n s

英英释义

单词用法

同义词

反义词

例句

1.The temperature in the epilimnion (表层水) is significantly warmer than in the deeper layers of the lake.

湖泊的epilimnion（表层水）温度明显高于湖泊的深层水。

2.During summer, the epilimnion (表层水) can become stratified, affecting aquatic life.

夏季，epilimnion（表层水）可能变得分层，从而影响水生生物。

3.Researchers often study the epilimnion (表层水) to understand the impact of temperature on fish behavior.

研究人员常常研究epilimnion（表层水），以理解温度对鱼类行为的影响。

4.The epilimnion (表层水) is where most photosynthesis occurs due to the availability of sunlight.

由于阳光充足，epilimnion（表层水）是大多数光合作用发生的地方。

5.In winter, the epilimnion (表层水) cools down and can mix with the layers below.

冬天，epilimnion（表层水）会降温并可能与下层水混合。

作文

The study of freshwater ecosystems often leads us to explore various layers within a body of water. One of the most significant layers in stratified lakes is known as the epilimnion. The epilimnion (上层水) is the upper layer of water in a stratified lake, characterized by its warm temperatures and higher light penetration compared to deeper layers. This layer plays a crucial role in the overall health of the aquatic ecosystem. In many temperate regions, lakes undergo seasonal stratification, where water temperature differences create distinct layers. During the summer months, the epilimnion forms as solar radiation heats the surface water. This layer can extend to varying depths depending on the lake's size, depth, and environmental conditions. The warmth of the epilimnion promotes photosynthesis, allowing phytoplankton and aquatic plants to thrive. These organisms form the base of the food web, supporting a diverse range of fish and other wildlife. The importance of the epilimnion extends beyond just biological productivity. It also influences physical and chemical processes within the lake. For instance, the warmer temperatures in this layer can lead to decreased dissolved oxygen levels, particularly during periods of high biological activity. As organic matter decomposes, oxygen is consumed, which can affect the health of fish populations and other aquatic organisms. Moreover, the epilimnion serves as a barrier to mixing with the deeper layers of water, known as the metalimnion and hypolimnion. This stratification can prevent nutrients from reaching the surface, leading to potential nutrient depletion in the epilimnion. Conversely, in some cases, nutrient-rich waters from the hypolimnion may not reach the surface during certain times of the year, leading to lower productivity. Understanding the dynamics of the epilimnion is essential for effective lake management and conservation efforts. Human activities, such as agricultural runoff and urban development, can introduce excess nutrients into the lake, resulting in eutrophication. This process can lead to algal blooms, which not only deplete oxygen but also release toxins harmful to aquatic life and humans alike. To mitigate these impacts, scientists and environmentalists emphasize the importance of monitoring the epilimnion and implementing best practices for land use and water management. Restoring natural vegetation along shorelines, reducing fertilizer use, and promoting sustainable agricultural practices are all strategies that can help protect the delicate balance of the epilimnion and the overall health of freshwater ecosystems. In conclusion, the epilimnion is a vital component of stratified lakes, influencing both biological productivity and the physical and chemical characteristics of the water. By recognizing its significance, we can better appreciate the complexities of freshwater ecosystems and work towards their preservation for future generations. The health of the epilimnion reflects the overall health of the lake, making it an essential focus for researchers and conservationists alike.

淡水生态系统的研究常常引导我们探索水体内的不同层次。在分层湖泊中，最重要的层次之一被称为上层水。上层水是分层湖泊中的上层水，因其温暖的温度和与更深层相比更高的光透过率而具有特征。这个层次在水生生态系统的整体健康中发挥着至关重要的作用。 在许多温带地区，湖泊在季节性分层时，水温差异会形成不同的层次。在夏季，太阳辐射加热表面水，形成上层水。这个层次的深度可以根据湖泊的大小、深度和环境条件而有所不同。上层水的温暖促进了光合作用，使浮游植物和水生植物得以繁荣。这些生物形成了食物链的基础，支持着多样化的鱼类和其他野生动物。 上层水的重要性不仅限于生物生产力。它还影响着湖泊内的物理和化学过程。例如，这一层的温暖温度可能导致溶解氧水平降低，尤其是在生物活动高峰期。随着有机物的分解，氧气被消耗，这可能影响鱼类种群和其他水生生物的健康。 此外，上层水作为与更深层水（即金属层和底层水）混合的屏障。这种分层可能阻止营养物质到达表面，导致上层水中的潜在营养物质耗竭。相反，在某些情况下，来自底层水的富营养水在某些季节可能无法到达表面，导致生产力降低。 理解上层水的动态对有效的湖泊管理和保护工作至关重要。人类活动，如农业径流和城市发展，可能会向湖泊引入过量营养物质，导致富营养化。这个过程可能导致藻类暴发，不仅耗尽氧气，还释放出对水生生命和人类有害的毒素。 为了减轻这些影响，科学家和环保人士强调监测上层水的重要性，并实施最佳的土地使用和水管理实践。恢复沿海岸线的自然植被、减少肥料使用以及促进可持续农业实践都是可以帮助保护上层水和淡水生态系统整体健康的策略。 总之，上层水是分层湖泊的重要组成部分，影响着生物生产力以及水的物理和化学特性。通过认识其重要性，我们可以更好地欣赏淡水生态系统的复杂性，并努力保护它们，以惠及未来几代人。上层水的健康反映了湖泊的整体健康，使其成为研究人员和保护工作者的重要关注点。