05/01/2026
Macroinvertebrate (aka stream bug) populations can indicate stream health.
But did you know that the surrounding geology and other abiotic factors should be factored into stream quality checks using macroinvertebrates and fish? This article gives a great overview.
"In terms of macroinvertebrate and fish communities, notable differences are documented in relation to the underlying geology, water chemistry, sediment, nutrient inputs, and dissolved oxygen. The surrounding land use along a waterway impacts the quality of runoff into a stream. All waterways function as the arteries of our landscape. On a watershed scale, they receive, transport, and filter nutrients, sediment, and contaminants from the land and in return, provide us the opportunity to have clean drinking water, healthy food, and recreation area. Just like the arteries in our own bodies, the output is impacted by the input, and in countless instances, waterways become impaired by the excess."
There are "benthic connections" happening all the time and the creatures below have their own way of interacting with the more than 86,000 stream miles in PA.
