The fifth installment of my soil life illustration series is finished!
The two large protozoa pictured here are of the genus Euplotes, which are common in aquatic and terrestrial habitats. I used to see them frequently in freshwater biofilms (algae slime layers) in university, and I still see them every now and then in my agricultural soil samples too. They have a long ridge along the underside with a fringe of fine cilia to help filter and draw food in. Longer cilia (the things that look like tentacles) around the cell help them to swim and control movement in the water. I still find it incredible that so much can be accomplished by one single cell, and that something this tiny can be so complex. Watching them navigate through samples searching for food is truly fascinating.
The three smaller green protozoa on the left side of the picture are of the genus Euglena. They are flagellates, unlike Euplotes which are ciliates. Another flagellate of the genus Anisonema can also be seen working its way through the soil just below the ciliates. Flagellates are also single-celled organisms, but they are typically smaller than ciliates and travel by only one or two long whip like tails, as opposed to ciliates which travel using larger numbers of shorter “hairs” called cilia. Unlike most protozoa which are heterotrophs, Euglenids often contain chloroplasts like plants, which means they can also photosynthesize and create their own food, in addition to eating food from outside sources. So does this make Euglena a plant or an animal? Euglena is not the only protozoan to give early taxonomists a unique challenge, and this lead to protozoa being given their own kingdom in taxonomy, instead of simply being included in the animal or plant kingdom.
For the next illustration I’ll be featuring testate amoebae again, this time focusing on the genus Difflugia. This time I’m using a screen recording program to try and create a time lapse video of the entire process from start to finish. I’ve noticed that people often look a bit bewildered when I try to explain how I make these drawings, so I thought it would be interesting, and maybe even helpful, to make a video showing exactly how I do it.
It’ll probably take some time to get it done, I’m in school four days a week now and we have a new puppy in the house plus it’s time to start really getting into planning the spring gardens, so there really isn’t much time leftover for drawing. There has also been quite a bit of logging in the area for the past few weeks, and I have to say I don’t find the sound of chainsaws very inspiring to my art process, much less when it’s falling on top of general exhaustion and a tight schedule… but I’m doing what I can.
On the bright side the days are getting longer and the sun has finally started rising high enough to shine into the windows once again, and that has been a very welcome change.
Here’s a picture of our newest addition, Phoebe ❤