Did you know the science of our race track?

Fungi grow just about everywhere and yet we are usually ignorant of their presence until they produce mushrooms in our lawns or mold on the food in our fridge. Although they are common components of ecosystems (and, disconcertingly, our fridges!), and essential for nutrient recycling, we actually know very little about them. 

A long time ago, fungi were considered plants because they don’t move like animals do. But fungi are actually a completely unique group of organisms. Unlike plants, they cannot produce sugar via photosynthesis. They also have cell walls made of chitin not cellulose, like plants do. Chitin is actually the same material found in insect exoskeletons. Thus, fungi are actually more closely related to animals than plants. However, unlike animals, they obtain nutrition by absorbing, not ingesting, food. Animals put food into their bodies but fungi put their bodies into food! 

Fungi spend most of their lives being inconspicuous, but in reality, they are all around you. Many people know that fungal “roots” called hyphae, occur in the soil, but they are also found in places you might not expect. Fungi can be found in both fresh and saltwater environments. They also live on the outsides and insides of both plants and animals. Scientists have found at least several hundred fungal species living inside human guts, where they help us digest our food. As well, microscopic fungal spores float in the air all around us. Scientists estimate that there are 1,000 to 10,000 fungal spores in every cubic meter of air. Some fungi (e.g. lichens) have even found a way to live inside rocks! 

Most fungi are saprophytes, which means they digest dead plants and animals. By doing so, they release the nutrients back into the ecosystem for other plants and animals to use. They are part of nature’s recycling crew. However, some fungi also poison or trap microbes like nematodes (tiny worms) to get protein, so they are at least partly carnivorous. 

Many fungi are parasitic on living organisms. If you’ve ever had athlete’s foot or ringworm,  you’ve been parasitized by a fungus!

Fungal diseases can devastate plant, animal and human communities. The Irish Potato famine was caused by the introduction of a fungal potato disease from South America into Ireland. Right now, many of Canada’s bats are dying of White Nose Syndrome caused by the fungus Pseudogymnoascus destructans. 

Not all fungal relationships are negative though. Many fungi form mutually beneficial relationships called mutualisms, with algae and plants. Mycorrhizal fungi interact in a positive way with plants, receiving sugar in exchange for water and minerals. Most plant species (~90%) form mycorrhizal interactions with fungi. Lichens are communities of fungi living together with algae and cyanobacteria. They inhabit areas where neither organism could live alone, such as on rocks. In fact, lichens help create soil by breaking down rocks into smaller pieces. They also protect soil from wind and water erosion, particularly in dry areas, like grasslands. 

There are many species of Manitoba mushrooms that are edible, including many Boletes, Chanterelles, Chicken-of-the-Woods (Laetiporus sulphurous), Morels, Oyster Mushrooms (Pleurotus ostreatus), Puffballs and Shaggy Mane (Coprinus comatus) to name a few. However, there are also deathly poisonous ones like Amanitas (Amanita) and False Morels (Gyromitra esculenta), that can be confused with some edible species. 

If you want to collect and eat wild mushrooms, obtain some good mushroom field guides, and learn how to identify both the edible AND the poisonous species found here. I highly recommend taking a mushroom foraging course, or going out with an experienced picker before eating any wild mushrooms. Only eat mushrooms that you are 100% certain you have identified correctly. Keep at least one mushroom whole and uncooked to take to the hospital in case you get sick. Collect only young mushrooms, as older ones can become inedible, toxic, wormy or woody. Also remember to forage responsibly by only collecting what you will eat, and leaving at least some mushrooms behind so that the species can reproduce. 

Note: The Manitoba Museum is not responsible for any illness or poisoning resulting from incorrect mushroom identification and consumption. Please forage safely!