Lake associations: adding biodiversity to your water-quality monitoring

Many lake associations already run strong volunteer programs measuring clarity, phosphorus, and temperature. Biodiversity is the missing layer — and it is often what members care about most.

Why biodiversity belongs in lake monitoring

Water chemistry tells you about conditions; species tell you about consequences. Changes in native fish, freshwater mussels, amphibians, and invertebrates are early signals of shoreline development, warming, and nutrient loading.

Where to sample on a lake

Sample near inlets and outlets, public boat launches, developed and undeveloped shoreline, and deep-water stations. Boat launches are priority sites for invasive species such as zebra mussels, Eurasian watermilfoil, and round goby.

Engaging members

A species list with names members recognize — smallmouth bass, common loon, mudpuppy — builds support for shoreline buffers, septic upgrades, and boat-washing stations far better than a phosphorus value alone.

Building a long-term record

Repeat the same stations every year at the same season. Over time the association builds a defensible baseline useful for grant applications, township meetings, and state agencies.

Frequently asked questions

Can eDNA detect zebra mussels in a lake?

Yes. Targeted eDNA assays can detect zebra and quagga mussel DNA, often before adults are visible on docks or rocks.