I have good friends in Canada who are film makers, and currently they are making a documentary on Chronic Wasting Disease. Of course, Wisconsin was one of their destinations for filming, as well as western states, England and Norway. If you eat meat, or simply care about the health of wildlife, it is probably a good idea to pay attention to new information on this and similar diseases, as information is updated. One of the team members who has been working on CWD in Canada for many years told me about some research on lichens and prion disease . The Tiny Ones continue to amaze with yet another complex and very particular activity they perform, unknown to us. It may be very useful to us to learn how they deal with prions. This research is a start.
The researchers found three lichens that affected prions. One of them was Parmelia sulcata, pictured above with friends Moss and Flavopunctilia sp. The other two lichens were Lobaria pulmonaria and Cladonia rangiferina. I don’t think that Cladonia grows in this part of Wisconsin, but Lobaria pulmonaria does; sorry I don’t have an image for this post. Check Sharnoff’s lichen pages for images. These three lichens have a serine protease activity that breaks down the prion. The only way humans know how to break down a prion is with the use of extreme heat, high Ph levels and the use of detergents. There may be many ways that lichens can affect prions; the scientists are just getting started looking at how lichens do what they do. It probably is the fungal, mycobiont that is affecting the prion changes, but the researchers have many questions yet about how the lichens do what they do. We have talked about the many complexities of the lichens’ interactions with the environment, and unanswered questions we have, in other posts, so this isn’t new to Kickapoo Lichen Lovers!
Humans have just started looking at what the lichens are doing, and there are thousands of lichens, so it would be reasonable to suspect other species may have similar abilities.
I love to think about why certain lichens would find it useful to de-activate prions. What interactions might occur in their part of the world, that causes a lichen to even notice a prion? Could a prion harm lichens? Does a prion interfere with photosynthesis, or other functions of the photobiont or mycobiont partners? Maybe the mycobiont is simply ‘hunting’….just to bag that rare prion. (It’s ok to laugh….)
We have known for a long time that lichens have many antibiotic properties; maybe half the lichen species humans have checked have some antibiotic function. Birds line nests with known antibiotic-making lichens, which may keep nestlings safer from disease. We know lichens can detoxify pollutants they extract from the air. Maybe one of their functions in the world is to clean things up.
We will never know all the reasons, or all that any plant or animal does with its life that is useful and necessary for the other plants, animals, microbes, insects, and everyone else in the Web of Life. Learning even a small part of what’s going on around us opens us up to wonder, and sparks interest and then, with any luck for all the other life on earth, we are motivated to take care, and do less harm. The news that my special friends the Lichens are already dealing with prions made me laugh. Of course! They have been here millions of years longer than us, and have had a long time to develop elegant responses to the world around them. May we be able to follow their example.
Julie, Olga and I went out to view the white and wonderful woods after the big snow a couple days ago, and I, of course, had a secret agenda to also check on the Little Ones. As soon as the new snow warmed slightly the snow fleas were out hopping around. I knew the lichen would not be hopping around! But they do show their colors in the snow and I am still searching for new species. Each day in the forest brings the possibility of meeting a new lichen (as well as whatever other wonders appear whenever one stays in the woods a while). We are walking on Cutoff Trail. The ice has formed curtains along the rock walls, as it has almost everywhere this year.
No ice caves here, just a small cliff. The rock is mostly covered with liverwort, moss, fern; the lichen are small. One of my favorite trees, the river birch with its beautiful coppery bark, stands here.
The lichen like this tree too; the moist base has a colony of aqua blue lichen. Aren’t they beautiful on the red and silver bark? Since the names are not verified yet, I can describe them any way I wish, in this blog anyway! Don’t worry, names will be forthcoming by spring.
Turkeys flapped around in the treetops. The sun came out. On the south slope, snow in the branches began to melt, just enough to form liquid water at the edges of the snow on each branch. The trees were suddenly illuminated in diamonds of light. A few moments later as we walked away from the direct sunshine, the warming air simply made the clumps of snow in the branches fall off on our heads.
This is not a lichen, it is a fungus, making a little snow sculpture on the side of a tree.
While we move about so quickly and ceaselessly, the trees, moss, rocks and lichen quietly remain. The ice moves too. More slowly than us but faster than lichen, rock or tree; changing all those slow moving ones as it forms, grows and then disappears. The lichen and their rocks and trees will be here as we and the ice come and go.
Remember to enjoy the small things in life.
Today a friend and I walked to the top of Black Hawk rock. A light snow still covered shady areas, the sun was low in the sky and gray-blue clouds scattered into the distance. There was no wind, no birds singing. A flock of turkeys walked across the ridge above us making clucky noises. As we climbed up the west side of the hill, the colors of tree trunks, fallen leaves, and rocks seemed to get brighter and brighter. Greens, blues, white, yellow. Lichens! If they could sing, they probably would be doing a hallelujah chorus today. Everything is saturated from many days of rain and light snow, and the temperatures have been above or near freezing, and nothing else is growing to block the light. The Little Ones are feeling good! The forest is full of living, growing plants in the middle of winter. They are all very tiny and all they need is moisture, light and above freezing temperatures to flourish while all other plants and most animals are dormant.
Green and blue lichen covered pieces of bark scattered on the ground from a fallen branch.
Part way up the hill a tree trunk was lined with white stripes. From smooth white layers to toothed patches this fungus (possibly Irpex lacteus) changed shape and finally supported small white fungus with purple red undersides.
Moss, liverworts and lichens crowded branches and then rocks as we climbed onto the top of the ridge.
At the top we stand on the rocky point and the whole Kickapoo valley falls away into the distance; to the east, south and west. The sun breaks through clouds illuminating the far reaches of the valley and fallow fields turned golden. Juniper and oak cling to bare rock here and the lichen cling to the trees and rock. Every living thing is attached to another living thing. Snow and lichen share the rough branches. Some of the lichen are frozen solid but close to them others are soft and flexible. The cup shaped lichen are frozen solid, the liverworts, moss and flat green lichen are not, in the picture below.
The rock at the top of the cliff feels many footsteps over time but lichen are everywhere here. Gray, yellow, orange, blue, green, purple, white; the rock looks painted with lichens. We look down across the valley and realize that much of the color we see in the landscape is the color of the lichen and mosses that are an essential part of the system of lives that make our world alive. The white and pale green colors of branches in the treetops are lichen; the yellow, gold, green and black of rock faces are lichens, and their companions the moss and liverworts.
We ended the day walking through a field of big bluestem and other prairie plants, now golden and coppery in the sun. We know tomorrow the Little Ones will be frozen and dormant under the coming snowstorm; but as soon as the sun touches them again they will come back to life.
PS: My attempts to name species is open for corrections and suggestions. We are working on learning to identify lichen (and fungi and moss) so at this time are making guesses at best. If you know what a lichen or plant is in one of these pictures, please let us know what you think.