相关实验视频

Updated: Jul 2, 2025

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Measuring Phosphorus Release in Laboratory Microcosms for Water Quality Assessment

Published on: July 22, 2019

土壤温度和湿度作为山区流域出口的关键控制因素

Gordon Gianniny¹, John M Stark², Benjamin W Abbott³

¹Department of Watershed Sciences, Utah State University, Old Main Hill, Logan, UT 84322, United States of America.

The Science of the total environment

|February 16, 2024

概括

山地土壤的变暖增加了 (P) 的释放,可能导致湖泊缩. 然而,土壤湿度显著影响了这种P动员,影响了山区水生生态系统.

科学领域:

环境科学环境科学
地质化学地质化学
临界技术临界技术

背景情况:

寡量化山湖是环境变化的敏感指标.
在全球范围内,在山区湖泊中观察到 (P) 度的增加.
增加P负荷的驱动因素,如大气沉积和气候变化,需要进一步调查.

研究的目的:

研究流域土壤温度上升对山地土壤动员的影响.
要确定土壤温度的增加是否加速地化学气候变化和有机物分解,释放更多的P.
评估土壤特性与全球变暖对P释放的影响之间的相互作用.

主要方法:

实验室土壤化和田间土壤移植实验进行了配对.
来自美国西部的山地土壤受到受控的变暖.
测量包括雨水漏的P,土壤P动员和土壤呼吸.

主要成果:

土壤温度升高通常会增加P的调动.
发现,较低的土壤湿度水平限制了变暖对P.释放的影响.
土壤特征如较低的散密度,较高的pH值,较低的氧化含量和较低的C:N比率与较高的P度相关.

结论:

由于气候变暖导致的土壤中P的动员是山湖缩的潜在驱动因素.
具有特定土壤特性 (高P,足够的水分) 的流域最容易受到增加的P负荷的影响.
未来的气候变暖可能会加剧易受影响的山水生态系统的高温化.

关键词:

欧洲化是什么意思?山上的湖泊山上的湖泊营养素循环的循环.是一种的物质.土壤变暖土壤变暖

更多相关视频

Capturing Flow-weighted Water and Suspended Particulates from Agricultural Canals During Drainage Events

Capturing Flow-weighted Water and Suspended Particulates from Agricultural Canals During Drainage Events

Published on: November 7, 2017

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading

Laboratory-determined Phosphorus Flux from Lake Sediments as a Measure of Internal Phosphorus Loading

Published on: March 6, 2014

相关概念视频

The Phosphorus Cycle

The Phosphorus Cycle

Unlike carbon, water, and nitrogen, phosphorus is not present in the atmosphere as a gas. Instead, most phosphorus in the ecosystem exists as compounds, such as phosphate ions (PO43-), found in soil, water, sediment and rocks. Phosphorus is often a limiting nutrient (i.e., in short supply). Consequently, phosphorus is added to most agricultural fertilizers, which can cause environmental problems related to runoff in aquatic ecosystems.

Primary Production

Primary Production

The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.

Factors Affecting Solubility

Factors Affecting Solubility

Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:

Key Elements for Plant Nutrition

Key Elements for Plant Nutrition

Like all living organisms, plants require organic and inorganic nutrients to survive, reproduce, grow and maintain homeostasis. To identify nutrients that are essential for plant functioning, researchers have leveraged a technique called hydroponics. In hydroponic culture systems, plants are grown—without soil—in water-based solutions containing nutrients. At least 17 nutrients have been identified as essential elements required by plants. Plants acquire these elements from the...