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Fish Habitats
Stream Sizes
Stream size plays a critical role in the distribution of freshwater fishes. Some species have specific habitats, such as headwater streams with significant groundwater influences. Others are less particular, inhabiting a wide array of stream sizes through an extensive geographic range.
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| Small stream (headwater stream, AL) |
Small stream (East Fk. West Br. St. Joe's, MI) |
Moderate-sized stream (Green River, KY) |
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|
Moderate-sized stream
(Chagrin River, OH) |
Moderate-sized stream
(Borden Creek, AL) |
River
(Maumee River, OH) |
Habitat
 |
To learn more about habitat assessment, please view EPA's Habitat
Assessment And Physicochemical Parameters discussion in Chapter 5
of the Rapid
Bioassessment Protocols and the Fundamentals
of the Rosgen Stream Classification System from EPA's Watershed
Academy.