Jove
Visualize
联系我们
JoVE
x logofacebook logolinkedin logoyoutube logo
关于 JoVE
概览领导团队博客JoVE 帮助中心
作者
出版流程编辑委员会范围与政策同行评审常见问题投稿
图书馆员
用户评价订阅访问资源图书馆顾问委员会常见问题
研究
JoVE JournalMethods CollectionsJoVE Encyclopedia of Experiments存档
教育
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab Manual教师资源中心教师网站
使用条款与条件
隐私政策
政策

相关概念视频

Design Example: Design of an Irrigation Channel01:27

Design Example: Design of an Irrigation Channel

353
Trapezoidal channels are widely used in irrigation systems due to their cost-effectiveness and efficiency in conveying water. Trapezoidal channels feature a flat bottom and sloping sides, making them stable and easier to construct compared to other shapes. The bottom width and side slope ratio are determined based on the required flow capacity and site conditions. The side slope is kept gentle for unlined channels to prevent soil erosion.Hydraulic parameters in channel design include the flow...
353
Adaptations that Reduce Water Loss01:57

Adaptations that Reduce Water Loss

27.1K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
27.1K
Water and Mineral Acquisition02:34

Water and Mineral Acquisition

34.3K
Specialized tissues in plant roots have evolved to capture water, minerals, and some ions from the soil. Roots exhibit a variety of branching patterns that facilitate this process. The outermost root cells have specialized structures called root hairs that increase the root surface, thus increasing soil contact. Water can passively cross into roots, as the concentration of water in the soil is higher than that of the root tissue. Minerals, in contrast, are actively transported into root cells.
34.3K
Regulation of Water Output01:26

Regulation of Water Output

1.6K
The human body predominantly expels water through the urinary system. On average, an individual generates around 1.5 liters of urine each day. This amount can fluctuate based on how well a person is hydrated, but a critical minimum quantity of urine must be produced to ensure the body's proper functioning. Daily, the kidneys remove 600 to 1200 milliosmoles of dissolved substances, effectively excreting excess minerals and water-soluble toxins such as creatinine, urea, and uric acid from the...
1.6K
Weir: Problem Solving01:26

Weir: Problem Solving

191
Water flow in open channels is often measured using hydraulic structures such as weirs, which allow precise calculation of discharge. In a rectangular channel, flow rates are measured using three types of weirs: rectangular sharp-crested, triangular sharp-crested, and broad-crested. The weir head is set at a fixed height above the channel bottom, simplifying calculations and enabling the relationship between depth and flow rate to be analyzed.For the rectangular sharp-crested weir, the flow...
191
Osmoregulation in Insects01:47

Osmoregulation in Insects

16.9K
Malpighian tubules are specialized structures found in the digestive systems of many arthropods, including most insects, that handle excretion and osmoregulation. The tubules are typically arranged in pairs and have a convoluted structure that increases their surface area.
16.9K

您也可能阅读

相关文章

通过共同作者、期刊和引用图与本文相关的文章。

排序
Same author

Reevaluating introduced herbivores in conservation.

Conservation biology : the journal of the Society for Conservation Biology·2026
Same author

Multiscale effects of habitat fragmentation on plant functional composition: insights from Thousand Island Lake, China.

Oecologia·2026
Same author

Many pasts, many futures: Navigating the complexities of species reshuffling to help prevent extinctions.

Cambridge prisms. Extinction·2026
Same author

Ectoparasite abundance and pathogen prevalence of the San Clemente Island fox (Urocyon littoralis clementae).

PloS one·2026
Same author

Predator-prey temporal niche partitioning under human disturbance: a meta-analysis.

Nature communications·2026
Same author

Response to critique by Finch and Murray (2025): Misshot kangaroos and the limits of welfare regulation.

Animal welfare (South Mimms, England)·2025
Same journal

A native sulfur deposit in Gale crater, Mars.

Science (New York, N.Y.)·2026
Same journal

Coordinated demise of harmful algal blooms.

Science (New York, N.Y.)·2026
Same journal

Genetic effects put into context.

Science (New York, N.Y.)·2026
Same journal

Bacteria share proteins to survive antibiotics.

Science (New York, N.Y.)·2026
Same journal

Impacts shaped Earth's first continents.

Science (New York, N.Y.)·2026
Same journal

Erratum for the Report "Covalently bonded single-molecule junctions with stable and reversible photoswitched conductivity" by C. Jia <i>et al</i>.

Science (New York, N.Y.)·2026
查看所有相关文章

相关实验视频

Updated: Nov 7, 2025

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment
08:24

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment

Published on: May 2, 2025

560

马类工程师沙漠水的可用性

Erick J Lundgren1,2,3, Daniel Ramp4, Juliet C Stromberg5

  • 1Centre for Compassionate Conservation, Faculty of Science, University of Technology Sydney, Ultimo, NSW, Australia. erick.lundgren@gmail.com.

Science (New York, N.Y.)
|April 30, 2021
PubMed
概括
此摘要是机器生成的。

在北美沙漠的野驴和马挖井, 创造重要的水源. 这些"鱼井"支持更多的野生动物和植物多样性,增强生态系统对干旱的抵抗力.

更多相关视频

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
06:37

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Published on: November 13, 2017

9.4K
Parameterizing V-notch Weir Equations for Flow Monitoring in a Drainage Control Structure
07:15

Parameterizing V-notch Weir Equations for Flow Monitoring in a Drainage Control Structure

Published on: April 25, 2025

709

相关实验视频

Last Updated: Nov 7, 2025

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment
08:24

Mesocosm-Scale Constructed Wetland Design for Wastewater Treatment

Published on: May 2, 2025

560
Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds
06:37

Continuous Hydrologic and Water Quality Monitoring of Vernal Ponds

Published on: November 13, 2017

9.4K
Parameterizing V-notch Weir Equations for Flow Monitoring in a Drainage Control Structure
07:15

Parameterizing V-notch Weir Equations for Flow Monitoring in a Drainage Control Structure

Published on: April 25, 2025

709

科学领域:

  • 生态学
  • 生态系统工程
  • 沙漠生态

背景情况:

  • 巨型动物对生物圈的功能有很大影响,但它们在塑造干旱地区生态系统中的作用仍未得到充分研究.
  • 干旱地区的生态系统因人类活动而面临越来越多的干旱,这凸显了了解性机制的必要性.

研究的目的:

  • 调查北美沙漠中野生马类 (驴和马) 被忽视的生态系统工程作用.
  • 评估马类产生的水源对脊椎动物活动和河岸树木的影响.

主要方法:

  • 记录了野马在北美沙漠挖井获取地下水.
  • 与相邻的干燥地点相比,马体井的定量水特征密度和接近性.
  • 与对照地点相比,马的脊椎动物丰富度和活动.
  • 观察了马在促进河岸树木繁殖中的作用.

主要成果:

  • 野马可以挖掘高达2米的井, 增加水源的数量并缩短水源之间的距离.
  • 马匹井提供了重要的水资源,有时是唯一可用的水源.
  • 比邻近的干燥地点记录的脊椎动物丰富度和活动更高.
  • 它们模仿洪水干扰, 为沿河树苗园创造了有利的条件.

结论:

  • 野生马类在干旱环境中创造和维护水源,作为重要的生态系统工程师.
  • 马类创造的水域增强了生物多样性和息地连接性,缓冲了干旱.
  • 引入或野生的马类在增加干地生态系统应对气候变化的能力方面发挥着至关重要的作用.