The common pond scum Spirogyra, sea lettuce Ulva , and Volvox are just some of the 7, species of green algae that make up the phylum Chlorophyta. The close resemblance of green algae and true plants is no coincidence. Scientists have little doubt that the first plants evolved from green algae. As evidence, green algae and plants use identical photosynthetic pigments—chlorophylls a and b, which produce their characteristic green color, as well as red, orange, and yellow carotenoids.
Green Algae (Chlorophyta)
The photos on this page provide examples of what a harmful algal bloom HAB may look like. For comparison, photos of non-toxic blooms are also provided. It can be hard to tell a HAB from other non-toxic algal blooms and sometimes several types of algae can be present at one time. DEC recommends avoiding contact with any floating mats, scums, or discolored water. Complete the form with digital photographs close-up and landscape to show extent and location of the suspected bloom. If you have any issues submitting the form, please email HABsInfo dec. Algae is an important part of aquatic ecosystems and forms the basis of lake food chains.
Blue-Green Algae: A Deadly Danger for Dogs
Because it is hard to tell a HAB from non-harmful algal blooms, it is best to avoid swimming, boating, otherwise recreating in, or drinking water with a bloom. Keep reading to learn what to do if you spot a bloom. Click on the links below for more detailed information. Most algae are harmless and are an important part of the food web.
Before you let your dog jump into that lake to cool off this summer, pay heed! As the dog days of summer sadly come to an end, I wanted to write to warn you to be more discriminating about what lakes you let your dog swim in this summer and fall. So, why do I worry about algae as a toxicologist? I worry because of blue-green algae. What is blue-green algae?