100 Day Challenge #97: Can You Tell Lichen from Moss?

Be a nature detective. On your next hike, see if you can identify lichen versus moss. 

This can be tricky. Some types of lichen and moss look similar. They can even grow on the same rock or tree. To confuse matters further, some lichens are called mosses, like reindeer moss and caribou moss. Spanish moss is neither a lichen nor a moss but a flowering plant called a bromeliad. 

Use these simple clues to solve the mystery: Is it lichen or is it moss?

Moss or lichen?

Lichen-Photo by Jacob Copus on Unsplash

Moss or lichen?

Tionesta, Allegheny National Forest-by IvoShandor (CC-wikimedia)

  • Lichens are not a plant, while mosses are. Lichen is a fungi and algae sisterhood. Thus, mosses will have leaves and stems (sometimes very tiny ones). Lichens will not.

  • Mosses only grow in wet or moist, dark habitats, like on a rock in a stream or a tree in a damp forest. Lichen can survive in a variety of habitats, in full sunlight and damp places and even in the frozen tundra. It can also grow on manmade structures like metal poles and fences.

  • Lichen has a lot of different looks but is usually a dull, flat, leafy, crusty growth or, sometimes on trees, grows like dry shrub. 

  • Moss is typically soft and looks like a green mat that you might place on your porch.

  • Lichen tends to appear on unhealthy or dying trees. It’s rarely seen on healthy, fast-growing trees.

Lichen is actually quite amazing! Here are some fun facts about lichen that I lichen a lot.

This photo actually shows both moss and lichen. Which is which?

Photo by Pascal Meier on Unsplash

  •  The fungi and algae in lichens live in a mutualistic symbiotic relationship. That means they live together and benefit from each other. Algae provides a food source for the fungi. Fungi provide algae with some water and nutrients and a sturdy, protected home. A match made in heaven!

  •  Many people think Lichen kills trees, but it doesn’t hurt them at all. Lichen is self-sustaining, taking what it needs from air and rain.

  • Over 6% of the earth’s surface is estimated to be covered by lichens. There are over 20,000 different kinds in a variety of colors and shapes. They are found on every continent.

  • Lichen is usually the first type of organism to appear after a natural disaster, such as a fire. It can survive when plants can’t.

  • Scientists use lichen as a natural air quality indicator. It only thrives when the air quality is clean, because it absorbs everything in the environment around it. It actually helps clean our air by converting carbon dioxide to oxygen and absorbing any pollutants in the area.

  • Lichen has many uses! Very colorful lichen can be used for dyes for clothing. It can be used for antibiotic uses. You might even find it as an ingredient in your deodorant or toothpaste. Smooth rock tripe lichen can be boiled, cleaned and roasted as a nutritious potato-chip-like food. Several Native American tribes eat hanging tree lichens as a traditional food.

  • Lots of animals like lichen. Deer use it as a food source, frogs enjoy it as a snack, and birds like hummingbirds use it in their nests. 

  • The oldest lichen on the planet, the map lichen (Rhizocarpus geographicum) in the artic, is 8,600 years old, by far the oldest living organisms on the planet. 

  • Lichen first appeared on the earth 250 million years ago.

 Hiking can be more than just exercise in a lovely environment. It can also be a chance to explore, increase your powers of observation, exercise your senses, use your imagination, and renew your your sense of wonder. I’m happy to share more ways if people would like.

Spanish Moss. Not Moss or lichen.

Photo by Jaël Vallée on Unsplash

But for now, a couple Dad jokes about moss and lichen!

Q: Where do Russian cows go to gather moss?

A: Moscow.

I made a video about the symbiotic relationships between fungus and algae

Don't forget to lichen subscribe!

Happy hiking and nature detective work!

Lichen can be very colorful.

Photo by Patrick Hendry on Unsplash

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100 Day Challenge #96: Nature Fun Facts!

Since I’m working on a new edition of my book Camping Activity Book for Families: The Kid-Tested Guide to Fun in the Outdoors, that’s where my head is. So, I thought I’d share a few fun facts about elements of nature. 

I LOVE these kinds of facts and factoids!

Did you know that you can use a pine cone to forecast the weather?

Set up a few on a windowsill to create your own pine cone weather station. Pine cones open and close depending on the humidity to help seed dispersal. When the weather is dry a pine cone opens up to let the wind catch the seeds and send them further away where they have room to sprout and grow. 

Photo by Robert Zunikoff on Unsplash

If it’s humid and rain is likely, a pine cone closes up so the light seeds won’t become water logged, limiting their travel. If seedlings start to grow too close to the parent tree, they’ll have to fight for resources and might be shaded. 

 

What causes leaves on trees to change color in the fall?

Photo by Yoksel 🌿 Zok on Unsplash

Some leaves contain other pigments besides green (chlorophyll). They may also contain yellow, orange, and red pigments. In most of the life of a leaf, you don’t see these pigments, because the green color of chlorophyll is so strong it masks any other pigment. 

But those colors shyly play a role in the health of the tree. Yellow, orange and red can transfer the sunlight energy they capture to chlorophyll. They’re kind of like photosynthesis’ faithful sidekicks. 

When a leaf gets old, the tree reabsorbs the chlorophyll from its leaves. It can reuse the nitrogen in the chlorophyll molecule. With the absence of green, the other colors show through. 

The fall colors, red, orange and yellow, are called carotenoids. You can also find them in corn (xanthophylls are yellow), carrots (carotenes are orange) and blueberries and cherries (anthocyanins are reddish).

Anthocyanin pigments are ONLY produced in the fall when it is bright and cold. The trapped sugar in the leaves’ veins promotes the formation of anthocyanins, which are used for plant defense.

Cool, huh?

The Guys in the Cricket Band

Photo by Ivan Ivanovič on Unsplash

Only male crickets make song. They have comblike structures on their wings that produce a chirping sound when they rub them together. They sing mostly to attract females but sometimes to ward off other male crickets. There are over 900 species around the world, and in some places, crickets are a symbol of good luck.

The Lowdown on Lizards!

Photo by verdian chua on Unsplash

Lizards first appeared on Earth over 200 million years ago. There are over 4,600 lizard species, with new types still being discovered. Many lizards have extremely good color vision and smell with their tongues. They don’t have earflaps like mammals do. Instead, they have ear openings to catch sound, and their eardrums are just below the surface of their skin. Lizards can’t hear as well as people, but their hearing is better than that of snakes. When young lizards grow, their scaly skin doesn’t. That’s why they have to shed or molt old skin, usually in large flakes. (The alligator lizard sheds its skin in one piece like a snake.) Male lizards do push-­ups to try to attract a female’s attention.

The largest lizard in the world is the Komodo dragon, which can grow up to 10 feet long and weigh 150 pounds. This giant reptile can only be found on a few Indonesian islands, including Komodo. The smallest lizards in the world are also island lizards: the Jaragua lizard, a dwarf gecko found in the Dominican Republic, and tiny leaf chameleons from Madagascar. The smallest measures 0.064 inch (15 mm) from the tip of the snout to the base of the tail.

Bug versus Insect

What is the difference between a bug and an insect, or do the two words mean the same?

We tend to use the word “bug” loosely for any very small creature with legs. However, a true bug is one type of insect. True bugs, such as beetles, usually have tough forewings and lack teeth. True bugs have a stylet (a mouth shaped like a straw) that they use to suck juices from plants. 

Insects, like bees and mosquitoes, have three—part bodies, usually two pairs of wings, and three pairs of legs. Arthropods (spiders, ticks, centipedes, and the like) are in a separate category from bugs and insects.

But you can still call them all bugs! It has become a common term for all these little critters.

The Scoop on Seeds

The biggest seed in the world is the coco de mer (Lodoicea maldivica), also known as the double coconut or love nut. It grows only in the Seychelles, a group of islands in the Indian Ocean. It weighs up to 38 pounds and is the shape of a human bottom!

The smallest seeds in the world are those of epiphytic orchids (family Orchidaceae) in the tropical rain forest. Some seeds are only 1/300th of an inch and weigh only 1/35,000,000th of an ounce. They are too small to be seen by the naked eye.

The record for the oldest seed ever grown is a 2,000-year-­old date palm recovered near the Dead Sea, bordering Jordan and Israel. When botanists (plant scientists) germinated them, one of the seeds grew.

Three seeds feed most of the world: rice, wheat, and maize (corn).

Seed Engineering. Seeds that can fly, like those of the sycamore tree and dandelion, may have given people the idea for helicopters and parachutes. The idea for Velcro came from a burdock seed. Swiss engineer Georges de Mestral returned with his dog from a hunting trip in the Swiss Alps and saw that his pant legs and his dog’s hair were covered in burrs from the burdock plant. As an engineer, he naturally began to wonder how exactly the seeds stuck so effectively to his pants and his dog. He examined the burrs under a microscope and discovered that they had very tiny hooks, which allowed the seeds to catch onto fabrics, which have tiny loops. The word Velcro is a portmanteau of the two French words velours (“velvet”) and crochet (“hook”).

Photo by Gabriel Kidegho on Unsplash

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