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  2. Nutrient - Wikipedia

    en.wikipedia.org/wiki/Nutrient

    A nutrient is a substance used by an organism to survive, grow and reproduce. The requirement for dietary nutrient intake applies to animals, plants, fungi and protists. Nutrients can be incorporated into cells for metabolic purposes or excreted by cells to create non-cellular structures such as hair, scales, feathers, or exoskeletons.

  3. Nutrient pollution - Wikipedia

    en.wikipedia.org/wiki/Nutrient_pollution

    Nutrient pollution, a form of water pollution, refers to contamination by excessive inputs of nutrients.It is a primary cause of eutrophication of surface waters (lakes, rivers and coastal waters), in which excess nutrients, usually nitrogen or phosphorus, stimulate algal growth. [1]

  4. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    Water is a good polar solvent, dissolving many salts and hydrophilic organic molecules such as sugars and simple alcohols such as ethanol. Water also dissolves many gases, such as oxygen and carbon dioxide—the latter giving the fizz of carbonated beverages, sparkling wines and beers.

  5. Plant nutrition - Wikipedia

    en.wikipedia.org/wiki/Plant_nutrition

    The Casparian strip, a cell wall outside the stele but in the root, prevents passive flow of water and nutrients, helping to regulate the uptake of nutrients and water. Xylem moves water and mineral ions in the plant and phloem accounts for organic molecule transportation. Water potential plays a key role in a plant's nutrient uptake. If the ...

  6. List of macronutrients - Wikipedia

    en.wikipedia.org/wiki/List_of_macronutrients

    Water makes up a large proportion of the total mass ingested as part of a normal diet but it does not provide any nutritional value. Ethanol provides calories but there is no requirement for ethanol as an essential nutrient. Even though macros and calories are different concepts, they are dependent on each other.

  7. Human nutrition - Wikipedia

    en.wikipedia.org/wiki/Human_nutrition

    The seven major classes of nutrients are carbohydrates, fats, fiber, minerals, proteins, vitamins, and water. [7] Nutrients can be grouped as either macronutrients or micronutrients (needed in small quantities). Carbohydrates, fats, and proteins are macronutrients, and provide energy. [7] Water and fiber are macronutrients, but do not provide ...

  8. Nutrition - Wikipedia

    en.wikipedia.org/wiki/Nutrition

    A nutrient cycle is a biogeochemical cycle involving the movement of inorganic matter through a combination of soil, organisms, air or water, where they are exchanged in organic matter. [12] Energy flow is a unidirectional and noncyclic pathway, whereas the movement of mineral nutrients is cyclic.

  9. Remineralisation - Wikipedia

    en.wikipedia.org/wiki/Remineralisation

    Therefore, most of nutrients remain in the water column, recycled by the biota. Heterotrophic organisms will utilize the materials produced by the autotrophic (and chemotrophic) organisms and via respiration will remineralise the compounds from the organic form back to inorganic, making them available for primary producers again.