Nutrient Cycling
Nutrient Cycling - Related Videos
10:48
Nutrients in Aquatic Ecosystems
0 Views •
2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Nitrogen and phosphorus are essential plant nutrients found in aquatic ecosystems and both are monitored as a part of water quality testing because in excess amounts they can cause significant water quality problems. Nitrogen in water is measured as the common form nitrate (NO3-) that is dissolved in water and readily absorbed by photosynthesizers such as algae. The common form of phosphorus measured is phosphate...
13:31
Soil Nutrient Analysis: Nitrogen, Phosphorus, and Potassium
0 Views •
2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University In this experiment, three soil macronutrients are chemically extracted, combined with color-based reagents, then analyzed using color to determine the nutrient concentration present in the soil sample. Nitrogen, phosphorus, and potassium are the main components of soil fertilizer. These methods isolate each nutrient from the soil into a solution that can be analyzed using turbidity and color to determine the...
09:13
Hydroponics: A Versatile System to Study Nutrient Allocation and Plant Responses to Nutrient Availability and Exposure to Toxic Elements
0 Views •
Cited by 102 •
2016
Here, we present an easy-to-follow protocol to establish a successful hydroponic system for plant nutrition studies. This protocol has been extensively tested in Arabidopsis and can easily be adapted to other plant species to study specific nutritional requirements or the effect of non-essential elements on plant growth and development.
01:49
The Nitrogen Cycle
0 Views •
2019
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
01:19
Absorption of Nutrients
0 Views •
2024
Absorption refers to taking dietary nutrients from the intestinal lumen for transportation throughout the body. After digestion in the small intestine, carbohydrates, proteins, and fats are broken down into simpler forms. These essential macronutrients and other vital substances, such as vitamins, minerals, and water, are then prepared for absorption into the bloodstream. Enterocytes, which are specialized polar epithelial cells, line the mucosa of the small intestinal walls. These cells...
FAQs
Decomposers break down organic matter produced by living organisms and release nutrients into soil, water, or the atmosphere. This conversion makes elements such as nitrogen, phosphorus, and carbon available in inorganic forms that plants and microorganisms can absorb. Their activity therefore links the breakdown of biological material with renewed nutrient availability and continued ecosystem productivity.
Plants and microorganisms absorb inorganic forms released during the breakdown of organic matter. This uptake removes available nutrients from soil or water and incorporates them into living biomass, where they can later move through food webs. The balance between release and absorption helps regulate material availability and influences how effectively ecosystems sustain biological production.
Consumers redistribute nutrients by obtaining elements from the organisms they eat and transferring those materials through successive levels of a food web. Nutrients eventually return to the physical environment when organic matter is broken down, reconnecting biological communities with soil, water, or the atmosphere. This movement makes food-web structure relevant to ecosystem material balance.
Biologists can examine several connected features: decomposition of organic matter, nutrient availability in soil or water, absorption by plants and microorganisms, movement through consumers, and exchanges with the atmosphere. Comparing these processes helps reveal how an ecosystem maintains productivity, how soil fertility changes, and how nutrient movement responds to environmental disturbance.
Nutrient cycling provides a framework for relating decomposition and nutrient release to the materials available for plant and microbial growth. When researchers follow these connections, they can evaluate soil fertility and explain differences in ecosystem productivity. The same perspective also helps identify how changes in decomposition or nutrient availability may alter ecosystem function.
Fertilization adds nutrients to ecosystems, while fossil fuel combustion alters the movement and balance of carbon and other materials. These human-driven changes can shift biogeochemical balances beyond the conditions produced by natural biological and physical exchanges. Their consequences include eutrophication and contributions to climate change, making nutrient cycling important for evaluating environmental impacts.