The forest is blooming with fungus in Lake Chelan National Recreation Area. Mushrooms are easy to find on the forest floor, but the mere presence of a few mushrooms does not reflect the abundance of fungus working under the soil, nor their importance.
On most of my recent hikes I’ve stumbled upon small excavations in the soil. Typically, the depressions are a few inches across and deep. Even though I haven’t witnessed the excavation in progress, just the end result, I suspect these are made by rodents searching for fungus in the soil. On the Lake Shore Trail, south of Stehekin, I found clue to support my hypothesis.
Inside the hole was a truffle. Truffles are mychhorizal fungi. They do not photosynthesize, but these fungi are not parasites. They live in a symbiotic relationship with tree roots. Trees provide the fungi with sugar and the fungi provide trees with water and nutrients like phosphorus and nitrogen.
Truffles are highly sought after by fungal connoisseurs, human and rodent alike. They are especially important to flying squirrels, but rodents like flying squirrels are equally important to truffles. Unlike your typical toadstool, these underground fungus have no spore dispersal mechanism. They need animals to dig them up to spread their spores.
Flying squirrels, in particular, love truffles. Under the cover of darkness, flying squirrels find truffles by their odor, unearth them, and greedily devour them. Truffle spores are then distributed randomly and effectively in squirrel scat. For reasons unknown, my truffle was not harvested. Small rodents that eat truffles are preferred prey of owls and weasels. Was the excavator of this truffle snatched up by a unseen predator?
I don’t know the end to this particular story, but this is evidence of more than a rodent and hole. It symbolizes how predators need rodents; how rodents need fungi for food and trees for shelter; how trees need fungi for nutrients; how fungi need trees for sugars and rodents for dispersal. The tiny hole I found is more than superficial. It leads to a world of interdependence.
For more info on flying squirrels and truffles, check out Squirrels Cannot Live by Truffles Alone and Ties that Bind: Pacific Northwest Truffles, Trees, and Animals in Symbiosis.
6 thoughts on “Squirrels and Truffles”
That is really interesting, didn’t know that about squirrels. It all is so intertwined. Do we have flying squirrels in the Pacific Northwest?
Yes. They are more common than sightings would indicate. Since they are nocturnal, people often don’t see them. I’ve been lucky enough to see just a couple in my lifetime. Here’s their range from wikipedia: https://en.wikipedia.org/wiki/Northern_flying_squirrel#/media/File:Northern_flying_squirrel_Glaucomys_sabrinus_distribution_map.png
I had no idea!
Is that a white truffle? Are all truffles edible or are there inedible and dangerous truffles the way that there are with mushrooms? When I think of truffles, I think of European dogs or pigs that are trained to sniff out truffles. The black and white truffle delicacies that sell for a pretty penny and are used for culinary purposes. I never knew you could find truffles in the Pacific NW.
I’m not sure what species it is. I’m a novice when it comes to fungus ID. I haven’t read anything that suggests there are poisonous truffles, but I haven’t investigated it either. Truffle collecting though is big business in much of the Pacific Northwest.
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Potential new career option 🙂