Related topics: algae · water

Research reveals harmful algal blooms' daily cycles

In new NSF-funded research, scientists at the Great Lakes Center for Fresh Waters and Human Health show that, as in the rest of life, timing is everything. Published in the journal Frontiers in Microbiology, their recent ...

Research reveals harmful algal blooms' daily cycles

In new NSF-funded research, scientists at the Great Lakes Center for Fresh Waters and Human Health show that, as in the rest of life, timing is everything. Published in the journal Frontiers in Microbiology, their recent ...

Stranded whales detected from space

A new technique for analysing satellite images may help scientists detect and count stranded whales from space. Researchers tested a new detection method using Very High Resolution (VHR) satellite images from Maxar Technologies ...

Lakes worldwide are experiencing more severe algal blooms

The intensity of summer algal blooms has increased over the past three decades, according to a first-ever global survey of dozens of large, freshwater lakes, which was conducted by Carnegie's Jeff Ho and Anna Michalak and ...

Bacteria bullets target toxic algae

Communities across the United States and around the world, along salty bays to freshwater lakes, increasingly are grappling with the dangerous effects of microscopic algae that suddenly grow out of control in these waters. ...

Landsat 9 instrument ready for spacecraft assembly

The Landsat 9 instrument that will help scientists detect deforestation, monitor crops and track potentially toxic algal blooms, among many other uses, is now built, tested, and in place to be assembled onto the spacecraft.

Bacteria make pearl chains

For the first time, scientists in Bremen were able to observe bacteria forming pearl chains that protrude from the cell surface. These pearl chains serve to better absorb and store substances from the environment. The researchers ...

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Algal bloom

An algal bloom is a rapid increase in the population of algae in an aquatic system. Algal blooms may occur in freshwater as well as marine environments. Typically, only one or a small number of phytoplankton species are involved, and some blooms may be recognized by discoloration of the water resulting from the high density of pigmented cells. Although there is no officially recognized threshold level, algae can be considered to be blooming at concentrations of hundreds to thousands of cells per milliliter, depending on the severity. Algal bloom concentrations may reach millions of cells per milliliter. Algal blooms are often green, but they can also be yellow-brown or red, depending on the species of algae.

Bright green blooms are a result of blue-green algae, which are actually bacteria (cyanobacteria). Blooms may also consist of macroalgal, not phytoplankton, species. These blooms are recognizable by large blades of algae that may wash up onto the shoreline. "Black water" is a dark discoloration of sea water, first described in the Florida Bay in January 2002.

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