The mid-morning weather is pleasant as my wife, Caroline and our dog, Riley join me for a hike to French Bay, on the mostly inaccessible and undeveloped southwestern shore of Beaver Island. From the car, we head west on an unmarked trail through a clearing where I spot blossoms of small-flower Asters and Jewelweed. Moving through a dense forest, I come upon the fruit of White Baneberry, a patch of Brittlely Club Moss and some White Cheese Polypore fungi. On a nearby stump, I spot a Compton Tortoiseshell butterfly while up in the canopy, maple leaves are turning red, an early sign of the season to come. Still a ¼ mile from Lake Michigan, we follow the trail as it cuts diagonally down the face of a bluff that was the island’s western shoreline some 4000 years ago after the ice age when lake levels were much higher due to melting glaciers. Finally, the trail opens to reveal lovely French Bay, one of the island’s hidden jewels. Exploring the beach area, I notice blossoms of St John’s wort and Anemone Multifida. Also, the red fruit of Bearberry and female cones from a Tamarack tree catch my attention. Moving to the stony beach, I observe: a 2-tone feather of a juvenile gull, one of several fast-moving, ¼-inch, black Wolf spiders and another Compton Tortoiseshell butterfly displaying the gray, mottled underside of its wing. Next, I pause at the shore as gentle waves of clear water move over colorful stones. However, just a few yards away, I come upon dense layers of slimy green algae piled along the water’s edge. This, non-toxic “seaweed”, called Cladophora, is found naturally along all the Great Lakes shores. Cladophora blooms were a major problem back in the 1960’s and 70’s due to high phosphorus levels in the water from fertilizers and laundry detergents. Negative impacts included unsightly and foul-smelling beaches, health risks from bacterial growth, clogging of water intakes, reduced drinking water quality and property depreciation. Due to tighter pollution controls, phosphorus levels declined, resulting in a significant reduction in Cladophora blooms in the 1980’s and 90’s. However, these current blooms are related to the invasion of zebra and quagga mussels (stock photo). First-of-all, these mussels filter feed on plankton, clearing the water for sunlight to stimulate Cladophora growth. Secondly, a by-product of their feeding is dissolved phosphorus that also stimulates its growth.
Great Michigan Lake, beauty behold!
Spectrum of blues from shore beyond
Sketchy words for such a scene
Colorful canvas lit by a noonday sun
Cobalt to indigo, teal to turquoise
Aquamarine to azure, pastels aplenty
Changing shades, ever floating hues
Spaces and times of still water
Textures of ripples and waves
Sprinkled with drifting diamonds
Nature’s finest lacustrine layout
D. DeGraaf