相关实验视频

Updated: Jun 14, 2025

BtM, a Low-cost Open-source Datalogger to Estimate the Water Content of Nonvascular Cryptogams

BtM, a Low-cost Open-source Datalogger to Estimate the Water Content of Nonvascular Cryptogams

Published on: March 25, 2019

在中国乌兰布赫沙漠的两个Ammopiptanthus mongolicus社区的水源差异

A-Qing Wang¹, Ya-Juan Zhu¹, Yuan Ma²

¹Institute of Desertification Studies, Institute of Ecological Conservation and Restoration, Chinese Academy of Forestry, Beijing 100091, China.

Ying yong sheng tai xue bao = The journal of applied ecology

|September 5, 2024

概括

植物群落适应各种沙漠息地的用水策略. 沙丘上的灌木在干旱期间利用了深水源,而戈壁的灌木则依赖于深层土壤水,显示出雨水的敏感性.

科学领域:

生态生态学生态生态学
植物生理学植物生理学
稳定同位素地球化学稳定同位素地球化学

背景情况:

息地异质性显著影响植物用水战略.
了解灌木适应干旱环境对于沙漠生态系统管理至关重要.
由于资源稀缺,沙漠植物群体在获取水方面面临挑战.

研究的目的:

调查灌木社区的季节性水源利用情况,以应对息地异质性.
确定 *Ammopiptanthus mongolicus* 和相关物种在沙丘和戈壁环境中的适应性用水策略.
量化不同水源 (土壤水和地下水) 对灌木水吸收的贡献.

主要方法:

在灌木和潜在的水源的树脂水中测量稳定同位素 (δD和δ¹⁸O).
应用MixSIAR混合模型来分析水源贡献.
从4月到9月在乌兰布沙漠进行季节性采样.

主要成果:

沙丘上的灌木季节性地转移水源,在雨后利用浅层土壤水,在干旱期间利用更深层土壤水/地下水.
沙丘上的*Ammopiptanthus mongolicus*在干旱期间获得地下水,而戈壁地区的人口则完全依赖深层土壤水.
不同的灌木物种表现出不同的用水模式,反映出利基区分和适应当地条件.

结论:

灌木用水策略是动态的,适应季节性变化和息地类型 (沙丘与戈壁).
*Ammopiptanthus mongolicus*在供水方面表现出可塑性,沙丘种群在干旱期间更容易获得深水资源.
这些发现强调了在评估干旱生态系统中的植物用水量时,考虑息地异质性和季节性动态的重要性.

关键词:

息地的异质性息地的异质性它是稳定的同位素.水源水的来源是水.

更多相关视频

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Dissolved Solute Sampling Across an Oxic-Anoxic Soil-Water Interface Using Microdialysis Profilers

Published on: March 24, 2023

Divergence of Root Microbiota in Different Habitats based on Weighted Correlation Networks

Divergence of Root Microbiota in Different Habitats based on Weighted Correlation Networks

Published on: September 25, 2021

相关概念视频

Adaptations that Reduce Water Loss

Adaptations that Reduce Water Loss

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.

Responses to Salt Stress

Responses to Salt Stress

Salt stress—which can be triggered by high salt concentrations in a plant’s environment—can significantly affect plant growth and crop production by influencing photosynthesis and the absorption of water and nutrients.

Epiphytes, Parasites, and Carnivores

Epiphytes, Parasites, and Carnivores

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...

Responses to Drought and Flooding

Responses to Drought and Flooding

Water plays a significant role in the life cycle of plants. However, insufficient or excess of water can be detrimental and pose a serious threat to plants.