The activity below was contributed by Dr. Kyle Lauersen during our podcast interview.
The microscopic world of algae is often overlooked and underestimated. These tiny organisms hold immense significance in our ecosystem. As we peer through the lens of a microscope, we uncover a breathtaking spectacle of vibrant colors, intricate structures, and diverse species that thrive in aquatic environments.
Here, we’ll delve into the captivating realm of algae, exploring their beauty under the microscope. But first, let’s learn a little more about these incredible organisms hidden beneath the surface of our waters.
Introduction to Algae
Algae, specifically microscopic unicellular algae, play a crucial role in the aquatic ecosystem. They are commonly referred to as phytoplankton and serve as the foundation of the aquatic food web. These algae perform photosynthesis and provide energy for various organisms, including zooplankton, fish, whales, and birds.
Belonging to the kingdom Protista, algae consist of different groups, such as green algae, diatoms, dinoflagellates, and cyanobacteria, each having distinct characteristics. They can thrive in diverse environments, from freshwater to marine and even extreme conditions. Their adaptability and ability to colonize different habitats make them successful primary producers in aquatic ecosystems.
Algae possess remarkable beauty, especially when observed under a microscope. Diatoms, in particular, with their intricate silica frustules, have captivated scientists and researchers for centuries.
Apart from their aesthetic appeal, algae also have a dark side. Under certain conditions, they can form blooms, which can have detrimental effects on both animals and humans. Some algae blooms produce toxins that can lead to illnesses and even death. Examples include red tide caused by dinoflagellate blooms and freshwater cyanobacteria producing hepatotoxins and neurotoxins.
Despite the risks associated with harmful algal blooms, algae are essential for life on Earth. They are responsible for producing approximately 50% of the oxygen we breathe. Their photosynthetic activity is vital for the survival of all living organisms.
Now that you understand their significant ecological role, let’s discuss how to observe the intricate beauty of algae under a microscope.
How do you identify algae under a microscope?
When you look under the microscope at a water sample containing numerous microbes, you may wonder how can we identify algae and differentiate between algae and other organisms?
My podcast guest, Dr. Kyle Lauersen, an algae researcher, suggests you start by looking for plastids, blob-like structures that are typically green, but can also be yellow or brown. They may appear in various forms within different organisms, such as single cells with one plastid or larger cells with multiple plastids. The key characteristic to look for is coloration within the cell’s internal structure. If there is no colored internal structure, it is likely not traditional algae.
At-home microbiology activity: Algae Under the Lens: A Microscopic Exploration
To experience algae in a hands-on way, try out this activity, “Algae Under the Lens: A Microscopic Exploration.”
By regularly sampling water outside, observing it under a microscope to see the organisms that grow, and sketching what you discover, you can delve deeper into the wonders of the microbial realm.
- Select a pond or set up your own standing body of water that will be accessible for regular check-ups and sampling over the course of several months.
- Sample the water at consistent intervals, such as once a week or every few days, depending on what is suitable for your purposes.
- Prepare the collected water samples for microscopic observation by creating a wet mount.
- Use a microscope to observe the water samples. Adjust the microscope settings accordingly to achieve optimal focus and clarity.
- Take note of the different organisms you observe under the microscope. Pay attention to their structures, sizes, and any other notable characteristics.
- Make sketches of the organisms to capture their visual details.
- Share your sketches on Twitter with Dr. Kyle Lauersen (@Kylelauersen) and me (@joyfulmicrobe) so we can see your observations and artwork!
- Practice sketching and improve your hand-eye coordination by regularly observing and documenting the microbial world around you. With time and practice, you’ll become more skilled at capturing the intricate details of the organisms you encounter.
Enjoy the exploration of algae, and have fun with your observations and sketches!
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My Quick Start Guide to Using the Microscope will get you up and running fast. Plus, you’ll learn while doing — the guide provides 3 fun activities that teach you step-by-step how to use your microscope and get the best image while looking at microbes! Get your copy today!
Algae Biotechnology
