Home Topics Producers and Decomposers of Freshwater


Gardnerella vaginalis

Gardnerella Vaginalis

Definition Gardnerella vaginalis is the name of a micro-aerophilic coccobacillus found in the vaginal flora. Gardnerella vaginalis does not cause bacterial vaginosis (vaginal infection) unless...
Acetic Acid

Acetic Acid

Definition Acetic acid is a mildly corrosive monocarboxylic acid. Otherwise known as ethanoic acid, methanecarboxylic acid, hydrogen acetate or ethylic acid, this organic compound is...
Amino Acids

Amino Acids

Definition Amino acids are the building blocks of polypeptides and proteins and play important roles in metabolic pathway, gene expression, and cell signal transduction regulation....
BCAA supplements: a muscle myth?

Branched Chain Amino Acids

Definition The branched-chain amino acids or BCAAs, leucine, isoleucine, and valine are three of the nine nutritionally essential amino acids. These three ingredients form a...
Sulfuric acid

Sulfuric Acid

Definition Sulfuric acid (sulphuric acid) is a corrosive mineral acid with an oily, glassy appearance that gave it its earlier name of oil of vitriol....
Bile salt action in the gut

Bile Salts

Definition Bile salts are found in bile, a secretion produced by liver cells to aid digestion. Although bile is 95% water, bile salts are its...
The salivary glands

Submandibular Gland

Definition Submandibular glands are the second-largest salivary gland type, producing around 65% of our saliva when unstimulated (at rest). Located under the jaw, the exocrine...
Metaphase I

Metaphase I

Definition The first metaphase of meisosis I encompasses the alignment of paired chromosomes along the center (metaphase plate) of a cell, ensuring that two complete...
Prophase II

Prophase II

Definition During prophase II of meiosis II, four important steps occur. These are the condensing of chromatin into chromosomes, disintegration of the nuclear envelope, migration...


Definition Aldosterone (C21H28O5) is a mineralocorticoid hormone compound secreted by the adrenal gland cortex. It is part of the renin angiotensin aldosterone system or RAAS...

Producers and Decomposers of Freshwater

Freshwater Producers

Plankton species like protozoans and diatoms as well as phytoplankton such as green algae and blue-green algae (cyanobacteria) are the smallest producers in the freshwater ecosystem. However, because of their vast numbers, together they are responsible for the majority of the photosynthesis. Larger producers in freshwater ecosystems are water lilies, water lettuce, water hyacinths, watermeal, duckweed, bulrushes and cattails. Freshwater producers use sunlight and carbon dioxide to perform photosynthesis and serve as a food source for consumers in the ecosystem.

Underwater photography pond plants
The image above shows some types of pond plants from an underwater perspective.

Freshwater Decomposers

Most freshwater decomposers like bacteria and fungi are on the bottom of rivers and lakes. This is where the remains of dead organisms and plants are found along with dead plant matter that enters the water from terrestrial sources. Decomposers continually replenish the nutrients in the soil by breaking down dead material through the use of biochemical and chemical reactions.


  • Falling into Freshwater. (n.d.). Retrieved October 9, 2017, from https://askabiologist.asu.edu/producers-and-decomposers-freshwater