Fun Facts

New Discovery in Lichen Partnerships

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German Lichen-close up
Yellow lichen in British Columbia

 For some time lichenologists have known of two species of lichen that are made of the same algae and the same fungi partners, but appear very different. One has vulpinic acid, which makes the lichen bright yellow, the other is dark brown. Recently scientists began looking for more than one algae species in these lichens and found a  mystery resident ; a basidiomycete yeast that lives in one species but not the other. Sorting through all the possible partners in a lichen seems daunting, but these scientists are up to the task. They hope to be able to induce lichen to form in vitro, so they can study up on some of their questions without collecting lichen from the wild. Did you know that lichen will not create themselves in an artificial environment? They know the difference.

Take a tour of  beautiful lichen pictures  while pondering whether those two lichens, one bright yellow and one brown, are really two separate species, and whether there could be more residents in any of those colorful Tiny Ones than we think, and whether they could be up to other behaviors and actions that we have no idea about yet.

BC 5A-DTtrunk Letharia vulpina 5.18b
Yellow color is from vulpinic acid in Letharia vulpina, British Columbia
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More yellow lichen on aspen bark- Xanthoria sp.

It’s hard to believe that a living being that holds so still can be doing so much! Sequestering nitrogen from the air, absorbing poisons from our air pollution, making nutrients available to the trees they are attached to, making soil out of rocks, providing medicine for birds and animals in the form of antibiotics that the lichens make, insulating nests and dens, and much more. Lichen continue to quietly go about their work in the world, so slow down on your next walk in the woods, and look for the Tiny Ones on tree trunks and rocks. Put your ear down close to the ground or the bark and listen. Take a hand lens, and look closely. What’s going on?

Let me know what you find!

 

Lichen History Revised

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tree lichen eagle river
Lichen and moss on tree near Eagle River

As in any well done science work, new information that can be verified may change our understanding of the world. We can only learn ‘the next step’, we can never completely know the depth and complexity of the world from any one perspective. And so now lichenologists have found something new going on in lichens that revised our understanding of when lichens first appeared on earth as well as what makes a lichen; at least certain lichens. I suspect they will always fool us; they are too complex to box into a category and leave them there.

The study originally looked for reasons some fungi and algae ‘hug’ each other and don’t let go. But along the way, the evidence seemed to show that fungi figured out how to do this in many places and times, not just from one ancestor. The earliest fungi to do this, that humans have evidence of so far, do not show up before ferns and a few other plants. So it may be that lichen did not colonize land before plants.

There may still be more surprises in the fossil records, and we may need to revise this story again in the future. It’s like a big puzzle; each piece is useful but only part of the picture. Even though we don’t have the whole puzzle figured out, we do see part of the story. Making adjustments, like sorting pieces-sky pieces we know go near the top of the puzzle, water pieces near the bottom- helps understand the patterns of life on earth even as we continue to search for the details.

BC 5A-DTstump Letharia vulpina 5.18a
Letharia vulpina in British Columbia

For a life as simple looking as lichen are (to us), they do have amazing abilities to be flexible and adaptable; traits we might find useful. So the scientists continue to look for why and how the lichen do what they do, and I’ll let you know when I find out too!

(The title image is Chicken-of-the-Woods, growing behind my horse barn, on an old log.)

Mushroom Music

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Laetiporus sulphureus – Chicken of the Woods

Veering off topic from Lichens to Mushrooms today; I just can’t help myself because the story is so wonderful. A human has written music from mushrooms. Not one song, but thousands, from every mushroom he encountered over decades of walking in the forest.

Recently a friend gave me information about the discovery that lichens disable prions, particularly the ones that make CWD. In the last post, I mused about what else they might be up to that we have no ideas about yet. As elders and others from cultures with intact connections to the living world know and occasionally inform us, everything is alive and interacts in myriad ways with the world. Some people still know that, and sometimes they make something beautiful from their love of the world’s beauty. And sometimes,  a human interacts with the living world in a new and beautiful way. That’s the story of Vaclav Halek.

Today, while listening to the radio program ‘To The Best Of Our Knowledge’ the story of Vaclav Halek’s willingness to listen to what he heard years ago, and his inspiration to add his own gifts to the mushrooms’ songs so other humans could also hear them sing, brought to mind all the discoveries made about mycelium, lichens, fungi, and other Tiny Ones, such as bacteria. So few humans notice the Tiny Ones, the Small Ones, the Stemmed Ones….all those who are quiet and small and everywhere. Sometimes we “hear symphonies” when in the presence of a grand landscape, or spectacular sky. But Mr. Halek’s symphony came from….mushrooms.

While wandering in the forest in the 1980’s, he first heard music coming from a mushroom. He seemed to have no hesitation in hurrying to write down what he heard. That response started a long relationship with thousands of mushrooms, all of them giving him their own unique music. Melodies, symphonies and many other pieces of music have been created over the years.

Here is the story about Mr. Halek:

https://www.radio.cz/en/section/curraffrs/vaclav-halek-composer-inspired-by-the-plaintive-cryof-the-mushroom 

Guardian story

John Cage was a mycologist as well as a musician, and used mushroom names in his works. He also commented that he could hear mushrooms. So Mr. Halek isn’t the only person to be aware of Mushroom’s voice.

Here is the last stanza from his poem ‘Mushrooms’:

they’ll be separated froM the rest of creation
and pUt in a kingdom
by themSelves.
all of tHis is an attempt
to stRaighten
Out
Our understanding of these plants, which perhaps
are not plants at all. so far they’ve
Managed to remain
juSt as mysterious as they ever were.

It’s easy to find a label…’synaesthesia’ and dismiss this man’s work as a harmless pathology.  I invite you to consider if there are other possibilities that hold potential, or simply cause happiness, for what he is doing.

If any of us go outside our walls, away from our electronics, and become quiet and slow and wait for a while, anyone may hear or see new and wonderful ways the world is alive, and maybe even singing to us, and maybe even has something to say or offer that is worth the effort to  listen.

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White beauties in the forest

How do you see, or hear, or smell the world? What places or beings could you discover by bringing your special awareness to a part of the world so far unnoticed? Maybe simply being in the presence of a sunset, or a mushroom, or an animal inspires your own creative expression of beauty, and maybe what is around you will also contribute in some way to that creative process. There are so many reasons to go out wandering in the fields and woods, but this is one of the most unique. If you hear a mushroom (or maybe even a lichen), let us know. And if you’re inspired by whatever you find or meet in your wanderings, please share your story.

 

 

Lichens and CWD

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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.

Parmelia sulcata + Flavopunctilia soredica wet 4.17 copy
Parmelia sulcata is the blue-green lichen with white edges

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….)

Usnea sp.-Canopy BV 3-17 Celestron
Usnea sp from canopy- microscope image

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.

Kickapoo Cathedrals 1
Lichen on river cliff

Foreign Lichens

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My friend Peter Schmidt was visiting Germany recently and found this tree branch in a woodland area. He thoughtfully shared it with your local Lichen Hunter. I have no idea what it is, but am going to spend some time with my lichen resources to challenge myself.

German Lichen-Peter Schmidt 3.19
Yellow lichen near Zulpich, Germany -Peter Schmidt photo

On the left there are some distant branches with yellow lichen; a careful look around this woodland might find more interesting species in addition to these bright yellow ones.

Here’s a closer view. Although the resolution is not good enlarged, we can see it is a foliose type of lichen; it has some leafy growth in areas and looks wrinkled, as if it is not tightly attached to the branch, as a crustose lichen would be.

German Lichen-close up
German lichen closeup view-from Peter Schmidt photo

Last summer I posted images from British Columbia, Canada, of the yellow lichens that are very common there in the fir and spruce forests.

BC 5A-DTtrunk Letharia vulpina 5.18b
Letharia vulpina -British Columbia -Susan Cushing photo

The Letharia is a fruticose type lichen; it has branches, grows upright or trailing and is attached to the tree at small, discrete spots, just like a shrub growing in the ground.

Letharia vulpina uses vulpinic acid to make the yellow color, which is poisonous. In some parts of the north it has been used as a poison to kill wolves and other animals.  It is toxic to any meat-eating mammal, as well as to molluscs and insects. But it does not affect mice and rabbits! The lichens use vulpinic acid to control the amount of light absorbed. (Lichen Biology, Thomas H. Nash III). The German lichen may use a different chemical to make its yellow color; a mystery I won’t solve today.

This spring I’ll go out looking for yellow colored lichens in the Kickapoo Valley Reserve  and Wildcat Mountain State Park. Join me! No matter what we find, we’ll have a good walk in the woods.

Remember, look for the Tiny Ones when you are out walking.

Susan

 

Winter Lichen Hunting Memories

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It’s raining tonight (February 23rd) and quite unpleasant outside. Today I retrieved from a drawer the lichen samples I collected last summer in Canada, with the intention of finally identifying the species. While traveling I discovered that the plastic clam boxes that fruit is sold in make great traveling sample containers for all sorts of delicate pieces of lichen as well as shells, bark, fallen birds’ eggs and dead bugs. I like to bring home all those things, look at them for a while then return them to the woods and fields to keep their place in the cycle of life.

Often, in many places, the only way berries and other small produce is sold is in plastic clamshell boxes, so I ended up with a few of them during our travels. I don’t buy food in plastic containers, but made a temporary exception during a few days of the trip. The paper envelopes usually used to hold lichen samples work the best, and they too can rejoin the circle of life when we are done using them. So now I’m sorting out the lichens from their plastic cages, and enjoying the memories of finding them during the summer’s travels.

Toby Cr trail S-Peltigera sp 6.18a
Peltigera sp. on soil, Toby Canyon Trail near Invermere, British Columbia

 

The Peltigera in British Columbia can also be found here in Wisconsin. When walking the KVR Wintergreen Bluff Trail stop at Lichen Site 4 (the rocky flat area) and look carefully for this species. There is quite a large area of them. Please stay on the trail while looking, so you don’t crush the Tiny Ones! At different times and weathers, these lichens will change dramatically, from being almost invisible to looking like they do in this picture.

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Peltigera at Lichen Site 4, Kickapoo Valley Reserve

Here’s what the bench land looks like above the Columbia River in southeast British Columbia. This is a Nature Conservancy area so has been protected from excessive damage. Much of the bench lands are built on, and the lichens are few in those places.

hoodoo trail
Nature Conservancy bench land above the Columbia River, British Columbia

Walking the trails here, this is what the ground looks like:

closeup BC Hoodoo trail S- biocrust 6.18
Soil surface-Nature Conservancy bench land reserve above the Columbia River, British Columbia

While walking, and especially biking through here, looking out at the scenery or the next obstacle to maneuver around, the life on the ground is something no one notices. Yet this microbiome is holding all the larger life in place, creating and protecting an environment, shelter, food supply system, promoting health, preventing erosion and more. As it disappears when we travel over it or dig it up, the diversity and therefore the sustainability of the whole area fails.

detail BC Hoodoo trail S-crustose 6.18 (1)
The soil surface up close, full of lichens and their buddies-fungi, bacteria, protists and more.

When we step on the ground here, it sounds a bit crunchy, and it is; the dry lichens break off and the delicate crust on the surface of the ground is broken open. All dry, open soils naturally have some microbiome crust, unless disturbed. This allows dry grasslands and even deserts to support a tremendous variety and number of living beings, from plants to insects, birds, mammals, reptiles and even humans.

These dry grassy areas in the western areas of our continent should be covered in some form of this microbiome. When visiting these areas, go slowly and look at what is on the soil and rocks, then step carefully. There is a miniature world at your feet as complex as the world of trees, grass and animals we are familiar with.

Leaving the dry grasslands and moving into the more tree covered slopes of the lower mountain elevations, there continues to be much life on the soil and rocks, but the trees also support a vast community of lichens. From deep rainforest communities to dry open pine forest, lichens love it here.

Br Cr LT aspen lower trunk7
Lichens on aspen trunk near Bragg Creek, Alberta 

 

DMCI lichen R4
Lichen on rock south of Calgary, Alberta; I have no idea of the species names!

The colors and shapes rival any garden. Each time a new rock is found, the lichen shapes and colors are different. Trees are festooned with bright yellow, pale yellow and greens of Usnea and Vulpicida as well as the grays and greens and blacks of Letharia, Hypogemnias and more.

BC 5A-DTtrunk Letharia vulpina 5.18b
Vulpicida canadensis on conifer, British Columbia
BC white fir_ LT- unknown sp 6.18
Conifer branch filled with healthy lichens-Hypogemnia austerodes

Yes, I do get those seed catalogs, and can get lost dreaming in them on winter days, but an excellent variation of that pastime is looking at lichen pictures. If there are not enough pictures here for you, try the best lichen picture site ever -Stephen Sharnoff’s amazing website. Add some color and amazement to your gray winter days by sharing this lichen blog and Sharnoff’s site too, with others, especially kids!

Contact us at the Kickapoo Valley Reserve if you want help learning about lichens. Come out and walk the Lichen Trail. Even in winter you’ll find some color and intrigue in Lichen Land. Thanks for reading this blog. Please share with others, to spread the news about our friends in Lichen Land.

More lichen poetry and a bit of science

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It’s hard to stop at just one poem. Now I’m looking for quotes about lichens, and more poetry too.  So here is another lichen poem, by a trained biologist. This one goes deep into Lichen’s personal life. You might enjoy having a glossary of lichen terms nearby to get the most out of her verse, but even without that, I hope you are amused. She gives a fairly good synopsis of lichen life. Memorize the poem (why not?) and amaze your friends.

Lichen Poem  by Caryl Sue  (National Geographic/BioBlitz)

Their love can be a bit crustose

with areoles in bloom;

Their love can produce thread-like string,

called hyphae, when they plume.

Their love has colonized the Earth

from deserts to the ice;

These extremophiles exist

on sand, on trees, on gneiss.

Who could these star-crossed lovers be?

Why are they symbiotes?

They reproduce asexually

unlike us mammal folk.

A fungus, a mycobiont,

is one part of the pair-

It often lives all on its own:

itself, dead things, and air.

The other love, photobiont

can turn light into food;

The trick is photosynthesis

a skill that’s pretty shrewd.

Photobionts can be algae,

sometimes cyanobac;

Some lucky fungi can have both

at once, and that’s a fact.

A pair now caught between two worlds

not fungi, not algae

A composite organism

of one, or two, or three.

United now, this smart couple

sets out to reproduce;

Small spores or fragments of themselves

are set on winds, diffuse.

Some reproduce by using spores,

sped off to parts unknown.

These fungi that do not find mates

are doomed to die alone.

Soredia, isidia

are reproductive packs

In orange, or green, or yellow hues,

or purple, white, or black.

O foliose! O fruticose!

O squamulose, and more!

The fungi and the algae have

so many types in store.

Animals use them for their nests—

hummingbirds and turkey;

They’re almost all that reindeer eat

in the winter, murky.

People eat them as “famine food”,

They’re not a tasty treat.

They’re used in herbal remedies-

in dyes, and perfumes sweet.

So, once upon a time ago,

fungi, algae convince—

They fell in love, and they have been

lichen it ever since.

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Lichens and ice on Cutoff Trail rocks Dec 2018

 

 

Lichen Poetry

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Poetry and lichens are two inspirations for me. I wrote a little lichen poem:

I’m liken’ lichens

they’re lookin’ lovely,

Like little lilies

all lined up on a log.

Of course it’s not very ‘good’! But it is fun. Lichens often seem very cheerful and playful. Any time there are so many shapes and colors, there has to be a party going on. I think it is the party of Life happening!

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Xanthoria sp. celebrating with bright colors

Greater poets than I have also noticed lichens, and each poet has a unique perspective. Pablo Neruda is one of my favorite poets. Here is his poem about lichens.

Lichen on Stone by Pablo Neruda

Lichen on stone: the web

of green rubber

weaves an old hieroglyphic,

unfolding the script

of the sea

on the curve of a boulder.

The sun reads it. The mollusk devours it.

Fish slither on stone,

with a bristling of hackles.

An alphabet moves in the silence,

printing its drowned incunabula

on the naked flank of the beaches.

The lichens

climb, higher, plaiting and braiding,

piling their nap in the caverns of

the ocean and air, coming and going,

until nothing may dance but the wave

and nothing persist but the wind.

If you are not familiar with Neruda’s work, read his Ode to Socks, and you will have a new love for a good pair of socks. Speaking of socks, I would love to have a nice warm pair of winter socks, with lichens crocheted or knitted around the top. It would go splendidly with my Lichen Hat. But my knitting skills are a long way from accomplishing those socks. Speaking of warm socks, now that it’s colder, and here in the Kickapoo, mostly damp and wet, it’s a good time to check your favorite rock or tree trunk for lichen activity. Of course, you won’t actually see any movement, but this is where memory is an important part of learning. Remember the last time you looked at that tree or rock?

CO R south facing- 10-17a
Lichen covered rock
CO R north facing 10-17g
Lichen covered rock

 

 

These two images of lichen covered rock are not exactly the same place, but illustrate the differences that can occur between wet and dry conditions. What is inconspicuous one day will be illuminated with color another day. Winter is a great time to see lichens, as the leaves that often cover them are gone. If there is not much snow the lichens are very visible, and of course on trees they are always visible.

If you see a beautiful lichen (use your hand lens!) and are inspired to write a poem, or just want to describe and complement the lichen, send your comment to this blog. If you give your name, I’ll send you a hand lens! Anonymous is ok too. Poems can be any length, any style, any degree of expertise; new poets are especially encouraged (I am one too). There will be a visit to the lichens, to read the poems to them, and anyone can come along for Lichen Hiking. Thanks for sharing this blog, and spreading Lichen Love!

BC 5A-DTtrunk Letharia vulpina 5.18b
Letharia vulpina on spruce tree in British Columbia

 

 

Lichens and Volcanoes

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Lava erupts from a fissure east of the Leilani Estates subdivision during ongoing eruptions of the Kilauea Volcano
Huffington Post image of Kilauea’s lava flow 

The past several months watching Kilauea’s changes as she wakes up has been fascinating. I have friends who have a home in this area, so there is a personal interest in what is happening there. As we adjust to the losses and changes for the humans, we are also respectful of Pele’s part in creating the lovely land we know as Hawaii. She knows what she is doing, and over time the foundation she lays for all other life will again support the abundance we are familiar with. After Pele cools off, what happens? For an entertaining account of the volcanic process, read Krakatoa by Simon Winchester

As the lava cools, the new earth is immediately colonized by bacteria that comes floating in on air currents. Also carried by the air are tiny seeds, bits of soil from other places, and…….lichens! Lichens are the first life to colonize the new earth, beginning to add organic matter to the surface as they grow and die, and they also begin their work of moderating the surface temperature and moisture content. They provide shelter for the first insects, who also blow in on the wind, or crawl from adjacent areas. Then the birds and lizards come to eat the insects and lichens, and then the tiny mammals, snakes, and gradually the forest reappears.

Usnea sp.-Canopy BV 3-17 Celestron
Usnea sp from canopy in Kickapoo Valley Reserve

Mt. St. Helens in Oregon, has changed dramatically after the eruption 35 years ago. This mountain was covered more in ash than lava, so many of the plants reappeared from under the ash; life did not have to restart from the tiniest bacteria and lichen spores.

Crustose lichens on rock in Columbia River valley, British Columbia
Crustose lichens on rock in Columbia River valley, British Columbia

Where there is any live topsoil nearby an area such as an industrial site or monocultured agriculture land, where no life has been for some time, the lichens are not always the first to live in those barren places. Seeds already are present, if not in the exposed earth they are nearby, and easily move into a barren area. But the lichens do appear on soil very soon, and when any trees have been growing for a few years, the lichens begin to appear.

The Hawaiian volcano process is a rapid “movie” of how life begins on new earth. Variations of that process occur everywhere, but are less easily observed. Check on science websites or local Hawaiian park sites or private blogs, USGS info, for news on how the land and life changes on the newly formed land.

Happy Lichen hunting!

 

Birds, Flowers, Frogs, Bats…..Lichens!

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Lecanora thysanophora +HO trail 6-17
Aren’t the colors amazing?

It’s summer! We are in the season of Frog Walks, night time Bat Surveys, Birding Events, star gazing nights and more. The extravagant displays of color and sound, the always changing feast for the eyes is at it’s best in the Kickapoo Valley Reserve.

Many of us review our familiarity with birds and plants we consider old friends, as they reappear each spring and summer. What have you learned recently, that is completely new, about the ecosystem you are part of? Now that you know at least some of the birds, flowers, trees, bats, mammals and even fungi and insects, what else could be here?

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Lots of pretty but hard to identify crustose lichens on a rock

Learning about lichens and their relatives in the fungi world is a good place to start because most of us have not thought much about these neighbors. An essential part of the natural world as we know it is made up of fungi and LICHENS. Lichens influence and in some ways may control the environment. Lichens are everywhere- rock, tree surfaces, and on the ground. Lichens are at least as diverse as any other group of organisms. Lichens are present every day of the year. Lichens may be enjoyed as you canoe down the river, walk on a trail, or sit under a tree watching birds. Lichens are colorful, beautiful, endlessly varied and so easy to get close to.

Take some time to read this website’s information, look at the lichen books at the KVR while you relax in the Visitor Center, and go for a lichen hike with a friend, or give me a call and we’ll go visit Lichen Land to see who’s there this time of year.

Join the KVR Lichen Project this year. Learn about lichens; the world of nature that you think you know will expand dramatically. Becoming familiar with lichens opens a doorway to the ‘web of life’ that all are part of. We mostly see individual parts; the bird, the tree, the river….but none of those are what they are without all the others they relate  to aand interact with. Lichens are quintessential collaborators, cooperators, adaptors. Many of the other residents you are familiar with are dependent on lichens to some degree. What can we learn about those relationships?

While the lichens moderates the climate for the tree it lives on, the tree moderates the climate for the earth under it and all that live there, and  moderates the air space it occupies, affecting all the air interacts with, on so on the web spreads. How many more relationships like this surround us? What happens when those interactive webs are changed or destroyed? What can we do to steward the health and survival of webs of life we do not understand well? How can we learn to see these connections better, to foster our understanding of what is going on around us?

Learning about lichens and becoming familiar with them as part of the beautiful world you interact with on your hikes and other activities in the green world is one way to enlarge your perspective and through that, your effectiveness in caring for both the KVR and the larger green world around us.

Lichens are a bit harder to find in the depths of summer greenery. Look on exposed rocks especially along the river. Lichens as well as mosses and liverworts abound on river cliffs. The lower parts of tree trunks are always easy to observe and have many lichen species growing on them. Notice the different lichens on different tree species. There are also some lichen species that seem to grow on many tree species. What could be the reason some grow almost everywhere and others are very particular about their location?

Wet weather wakes up lichens. Their colors are bright and they are actively photosynthesizing and reproducing. Take a picture, and compare it with the same lichen at another time of year, when conditions are dry. The lichen may be almost unrecognizable as the same one you saw on a wet day.

Enjoy the lichens wherever you find them this summer. Post a message here if you see any lichens you’d like to share!

BC 5A-DTtrunk Letharia vulpina 5.18b
Letharia vulpina on conifer in British Columbia