daphnia

简明释义

英[/ˈdæf.ni.ə/]美[/ˈdæf.ni.ə/]

n. 水蚤

英英释义

单词用法

同义词

反义词

例句

1.Daphnia Magna could respond even if the concentration of pesticide was in microgramme, .

结果大型水蚤能够灵敏检测饮用水农药污染，在浓度达到微克时，仍然有反应；

2.The acute and chronic toxicities of benzidine to Daphnia magna were studied.

研究了联苯胺对大型溞的急性毒性和慢性毒性。

3.Flumorph and SYP-48 all can restrain later development phase of Daphnia magma's embryo, such as larval curved or unextended shell spine, undeveloped antennae.

氟吗啉与SYP-48 相似，主要是在高浓度影响胚胎发育后期-幼蚤壳刺弯曲或者发育不完全，第二触角的发育也受到抑制；

4.Goss studied Daphnia magna, a tiny freshwater crustacean used in many aquatic toxicity studies.

戈斯以水蚤（Daphniamagna）——一种微小的淡水甲壳类昆虫——为研究对象。 该类昆虫过去常被用于各类水生生物毒性研究中。

5.The essay reported the testing method and results of toxicity research of the pesticide to a water flea, Daphnia Magna.

本文报道了新杀菌剂叶青双对水蚤毒性的测定方法和结果。

6.This article introduced the progress and views of applying Daphnia magna to research work.

通过文献调研综述了国内外大型水（氵蚤）生物测试技术的应用研究动态及发展趋势。

7.Fig. 1 Haplotype network for Daphnia longispinacomplex based on mitochondria COI gene sequences. Numbers between subnetworks represent the average number of mutations between subclades.

图1基于COI基因序列构建的长刺溞复合种单倍型网络图（图中数字代表了各分支的平均突变数量）。

8.The fish in the aquarium love to eat daphnia.

水族箱里的鱼喜欢吃水蚤。

9.In some cultures, people collect daphnia for bait when fishing.

在某些文化中，人们捕捞水蚤作为钓鱼的饵料。

10.The population of daphnia can indicate the health of a freshwater lake.

在淡水湖中，水蚤的数量可以指示水体的健康状况。

11.Researchers use daphnia to study the effects of pollutants in water.

研究人员使用水蚤来研究水中污染物的影响。

12.Aquatic ecosystems often rely on daphnia as a food source for larger animals.

水生生态系统通常依赖于水蚤作为大型动物的食物来源。

作文

The world of aquatic life is filled with fascinating creatures, one of the most intriguing being the daphnia. Commonly referred to as 'water fleas', daphnia are small crustaceans that thrive in freshwater environments. They play a crucial role in aquatic ecosystems, serving as an essential food source for a variety of fish and other aquatic animals. Understanding daphnia is vital not only for ecologists but also for anyone interested in the health of our water bodies.Daphnia can be found in ponds, lakes, and even in some rivers. They are known for their distinctive, jerky swimming motion, which is facilitated by their large, paddle-like antennae. This unique movement allows them to navigate through the water effectively, avoiding predators while searching for food. Daphnia primarily feed on algae and other microscopic organisms, filtering them from the water as they swim. This feeding behavior helps to maintain water quality, making daphnia important indicators of ecosystem health.One of the most remarkable features of daphnia is their reproductive strategy. In favorable conditions, they reproduce asexually, producing numerous offspring rapidly. However, when faced with environmental stressors such as overcrowding or limited food supply, daphnia can switch to sexual reproduction, creating eggs that can withstand harsh conditions. This adaptability is a key reason why daphnia populations can thrive in various environments, demonstrating resilience in the face of change.Research on daphnia has provided valuable insights into ecological dynamics and the effects of pollutants in aquatic systems. Scientists often use daphnia as a model organism in studies related to environmental science, toxicology, and even climate change. Their sensitivity to changes in water quality makes them excellent bioindicators, enabling researchers to assess the health of ecosystems and the impact of human activities on aquatic environments.Moreover, daphnia are increasingly being used in aquaculture and fisheries management. Their nutritional value and rapid reproduction rate make them an ideal live food source for juvenile fish and other aquatic organisms. By cultivating daphnia, fish farmers can ensure a steady supply of high-quality feed, promoting healthier fish growth and sustainability in aquaculture practices.In conclusion, the significance of daphnia in both natural ecosystems and human applications cannot be overstated. They are not just tiny creatures floating around in our ponds; they are vital components of the aquatic food web and essential indicators of environmental health. As we continue to explore the impacts of climate change and pollution on our water systems, understanding and preserving daphnia populations will be crucial for maintaining biodiversity and ecological balance. By studying daphnia, we gain not only knowledge about these remarkable organisms but also insights into the broader health of our planet's water resources.

水生生物的世界充满了迷人的生物，其中最引人注目的是daphnia。通常被称为“水虱”的daphnia是小型甲壳类动物，生长在淡水环境中。它们在水生生态系统中扮演着至关重要的角色，成为各种鱼类和其他水生动物的重要食物来源。理解daphnia不仅对生态学家至关重要，对任何关注我们水体健康的人来说也是如此。Daphnia可以在池塘、湖泊甚至一些河流中找到。它们以独特的、颤动的游动方式而闻名，这种运动由它们大型的桨状触角驱动。这种独特的运动使它们能够有效地在水中导航，避开捕食者，同时寻找食物。Daphnia主要以藻类和其他微生物为食，在游动时从水中过滤这些食物。这种取食行为有助于维持水质，使daphnia成为生态系统健康的重要指示物。Daphnia最显著的特征之一是它们的繁殖策略。在良好的条件下，它们进行无性繁殖，迅速产生大量后代。然而，当面临环境压力，例如过度拥挤或食物供应不足时，daphnia可以转向有性繁殖，产生能够承受恶劣条件的卵子。这种适应性是daphnia种群能够在各种环境中繁荣生存的关键原因，展示了在变化面前的韧性。对daphnia的研究为生态动态和污染物在水生系统中的影响提供了宝贵的见解。科学家们常常将daphnia作为环境科学、毒理学甚至气候变化研究中的模型生物。它们对水质变化的敏感性使它们成为优秀的生物指示物，能够帮助研究人员评估生态系统的健康以及人类活动对水生环境的影响。此外，daphnia在水产养殖和渔业管理中也越来越多地被使用。它们的营养价值和快速繁殖率使它们成为幼鱼和其他水生生物理想的活饲料来源。通过培养daphnia，鱼农可以确保持续供应高质量的饲料，促进鱼类的健康生长和水产养殖实践的可持续性。总之，daphnia在自然生态系统和人类应用中的重要性不容低估。它们不仅仅是漂浮在池塘中的微小生物；它们是水生食物网的重要组成部分，也是环境健康的重要指示物。随着我们继续探索气候变化和污染对水体系统的影响，理解和保护daphnia种群对于维护生物多样性和生态平衡至关重要。通过研究daphnia，我们不仅获得了关于这些非凡生物的知识，还获得了对我们星球水资源整体健康的深入见解。