”’algal bloom
An algal bloom is a relatively rapid increase in the population of (usually) phytoplankton algae in an aquatic system. Typically only one or a few species are involved and the bloom is recognized by discoloration of the water resulting from the high density of pigmented cells. Although there is no officially recognized threshold level, algae are unlikely to be considered to be blooming unless more than 10,000 cells per millilitre occur. Algal bloom concentrations may reach millions of cells per millilitre. Colors observed are green, yellowish-brown, or red. Bright green blooms may also occur. These are a result of blue-green algae, which are actually bacteria (cyanobacteria).
Dictionary > Algal bloom
You will also like...
![Biosecurity and Biocontrol](https://www.biologyonline.com/wp-content/uploads/2020/09/Biosecurity-and-Biocontrol-300x168.jpg)
Biosecurity and Biocontrol
This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..
![Population Regulation in an Ecosystem](https://www.biologyonline.com/wp-content/uploads/2020/02/Population-Regulation-in-an-Ecosystem-253x168.jpg)
Population Regulation in an Ecosystem
With regard to the population size of a species and what factors may affect them, two factors have been defined. They ar..
![Neural Control Mechanisms](https://www.biologyonline.com/wp-content/uploads/2020/02/Neural-Control-Mechanisms-300x152.jpg)
Neural Control Mechanisms
Neurons generate electric signals that they pass along to the other neurons or target tissues. In this tutorial, you wil..
![An artist depiction of a Precambrian multicellular life form.](https://www.biologyonline.com/wp-content/uploads/2020/02/The-Evolution-of-Cell-Organelles-224x168.jpg)
The Evolution of Cell Organelles
The nucleus containing the genetic material, DNA, and the mitochondria, well-identified as the "powerhouse of the cell",..
![kinesin motor proteins transporting molecules across microtubules](https://www.biologyonline.com/wp-content/uploads/2020/02/Movement-of-molecules-across-cell-membranes-252x168.jpg)
Movement of Molecules Across Cell Membranes
Molecules move within the cell or from one cell to another through different strategies. Transport may be in the form of..
![Angle Oak Tree](https://www.biologyonline.com/wp-content/uploads/2020/02/Seed-Plants-252x168.jpg)
Seed Plants
Seed plants are vascular plants. They differ from the other vascular plants in producing seeds that germinate into a new..