Spending just a few days at the river, you will be impressed with the fertility of the water, the ability of algae to grow on anything and everything that stays submerged. This is a constant condition, though it is heightened in flood years, when extra nutrients are washed into the system. We have learned to pull out our swim ladder when not in use, to prevent instantaneous appearance of slippery weeds on its steps. Boat ropes that dangle in the water quickly develop lengthy green beards. All of this is more dramatic in late summer, when the ëbloomí is on, and water clarity is much diminished.

Algae, however, is not the only form of seaweed. Each season, entire forests of plants arise from the river bottom and reach slowly, patiently, for the light at the surface. As they rise in the channel, they become the playthings of wind and current. Their roots must be firm, to hold them fast against the many strains that are applied to them.

These aquatic forests are vital habitat to many creatures. Minnows and crayfish hide there, as do young fish seeking refuge from voracious pike. Fishermen will tell you when to look for bass in these weed beds. Insects in nymph or larval form find homes among the foliage, and leeches swim past with their undulating, vertical strokes. Plants such as the white water lilies, with their wide, cleft leaves, create a barrier for sunlight and minimize the effect of the wind. The shade of such communities can be important to fish and other animals who need cooler temperatures.

For all its faults, seaweed is an important citizen of the north. I will not cut or poison it, even if it grows near the dock. I like the creatures who need it. If it is important to them, it is important to me.

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Forest Lake Times
P.O. Box 218
880 SW 15 St.
Forest Lake, MN 55025
651-464-4601
Fax 651-464-4605