Amazing things in Nature!
Nature continues to amaze us daily, by constantly adapting to the changing world around us. One amazing thing I know about nature is bioluminescence, it’s one of the most eye-catching things I have seen myself. While vacationing, I had the privilege of seeing bioluminescence on the beach while in the Caribbean. The water lights up beautifully as you run your feet through it, and the mechanisms behind how the water lights up is even more interesting. The bioluminescence we see is essentially a chemical reaction produced by living organisms, and involves luciferin (the light), and luciferase (the catalyst) (Bedolfe, 2012). The luciferase combines luciferin with oxygen to oxidise it, which creates oxyluciferin, and photons. The light we see is the result of the chemical reaction usually occurring in the organism, but it does not always occur inside it (Bedolfe, 2012). When I ran my hands through the water and disrupted the waves, the organisms present, called dinoflagellates, produce light as a defense mechanism (Aguilera, 2015). Here is a picture below of bioluminscence in action at night!
Image Credits: Alvaro Bejarano
An interesting fact I learned while diving more into this topic is that it only takes 15 milliseconds for the dinoflagellates to respond to stimuli! (Aguilera, 2015). It is extremely fascinating to think that the pretty glow I observed in the water was actually a warning from the dinoflagellates. It is also known that high levels of algal bloom are actually harmful to humans, and exposure to these phytoplanktons can cause skin irritation, and cause negative effects on ecosystems (Powell, 2022). There are different colours of bioluminescence that we can see, personally, I have seen a mix of green and blue light being produced. Another event caused by bioluminescent organisms are red tides, which are rare but can be seen more often now due to climate change. Red tides are lasting longer due to temperature changes, water pollutants, as well as severe weather events (Powell, 2022). I have never seen a red tide, but this picture below shows how they can appear to us, and it looks a little similar to an oil spill!
Image Credits: M. Godfrey, 2006
Red tides are made of the same bioluminescent algal blooms that are responsible for the pretty green colours we see as well (Powell, 2022). It is important that we understand the importance of acknowledging events such as red tides, as these are natural warning signs from nature. Humans have a tendency to overlook a lot of unusual events in nature, which eventually can lead to disastrous climate change that is non-reversible. I enjoy seeing the beauty in nature, especially bioluminescence, and to conserve these organisms and keep our algae levels at health levels, it's important to take care of our oceans. Can you name other species that also use bioluminescence?
References
Aguilera, M. C. (2015, May 5). Research highlight: The force behind Nature's light. Scripps Institution of Oceanography. Retrieved from https://scripps.ucsd.edu/news/research-highlight-force-behind-natures-light#:~:text=Dinoflagellates%20employ%20bioluminescence%20as%20a,as%20a%20type%20of%20alarm
Bedolfe, S. (2012, December 26). Ocean stemulation: How does bioluminescence work? One World One Ocean. Retrieved from https://oneworldoneocean.com/blog/ocean-stemulation-bioluminescence-how-does-it-work/
Powell, J. (2022, February 10). Bioluminescence - beautiful or dangerous? Gair Rhydd. Retrieved from http://cardiffstudentmedia.co.uk/gairrhydd/bioluminescence-beautiful-or-dangerous/
