Water chemistry monitoring equipment covered in algae

Detailed Description
Water quality monitoring sensors attached to a rail system along the banks of the North Fork Shenandoah River near Strausburg. Rail systems are used to deploy continuous water chemistry monitoring equipment in large rivers such as the Shenandoah.
These sensors were deployed as a part of the Shenandoah River HABs Project. They collect data on the river's water chemistry and that data is used to understand the drivers of Harmful Algal Blooms (HABs). These sensors are covered in algae after having spent time in the water of the Shenandoah.
Data for this monitoring site can be found at USGS Water Data for the Nation.
Sources/Usage
Public Domain.