National Park Service

Rocky Mountain I&M Network

Stream Ecological Integrity

Data gathering in Glacier National Park
Rocky Mountain Network employee collecting Stream Ecological Integrity data in Glacier National Park.

Stream Ecological Integrity Briefs

Stream Inventory Reports

Stream Ecological Integrity Monitoring Reports

Stream Ecological Integrity Monitoring Protocol

For more information contact: Billy Schweiger


The Stream Ecological Integrity protocol addresses multiple Rocky Mountain Network vital signs: Surface Water Dynamics, Groundwater Dynamics, Freshwater Communities, Invasive/Exotic Aquatic Biota, Invasive/Exotic Plants, Water Chemistry, and Focal Species–Beaver. The protocol will be implemented in five Rocky Mountain Network parks, with initial effort focusing on Glacier National Park.

Streams and rivers are fundamental components of nearly every Rocky Mountain Network park, and their ecology is both intimately linked with and reflective of the watersheds they drain. A defining feature of streams and rivers is their dependence on the landscape for inputs of energy and nutrients; streams integrate all systems within a landscape.

Streams also support a broad spectrum of ecological services, including wildlife habitat, nutrient processing, hydrologic cycling, and multiple socioeconomic functions for humans (e.g., water sources, fisheries, recreation). Since streams are typically sensitive to stressors at both local and landscape scales, they are one of the most useful types of ecosystems for longterm ecological monitoring in the Rocky Mountain Network.

Survey-site data will be used for making statistically valid inferences about stream condition across each Rocky Mountain Network parks, as well as population-scale, long-term trend assessments. Sentinel sites will be used for more intensive (both in terms of sampling frequency and instrumentation) monitoring to quantify loadings, site-scale trend, and possible mechanisms. Sentinel sites will occur on reaches as required by regulatory programs, in existing long-term stream sampling locations, at key confluences, and/or at watershed pour points.

Billy Schweiger (ROMN) collects macroinvertebrates on Hudson Bay Creek
Billy Schweiger (Rocky Mountain Network) collects macroinvertebrates on Hudson Bay Creek in Glacier National Park.

Preliminary Monitoring Objectives

  • Determine the seasonal, annual, and/or decadal status and trend, at the park scale, of benthos and periphyton assemblages (using multimetric and multivariate indices), physical habitat, and select physiochemical measures (e.g., NPS–Water Resources Division core parameters, anions, cations, nutrients, and sediment).
  • Quantify the seasonal, annual, and/or decadal patterns in benthos and periphyton assemblages, hydrologic dynamics, and physiochemical loadings of key water quality analytes (e.g., NPS–WRD core measures, any 303(d)-listed analyte, critical anions and cations, nutrients, and sediment) at sentinel stream sites.
  • Determine the long-term status and trend of stream length and proportion in each park where select invasive plant and aquatic taxa are present.
  • Determine the long-term status and trend of stream length and proportion in each park where beaver are present.

Potential Measures

  • Stream discharge
  • Habitat parameters including stream cover for fish and bank and riparian area status and cover
  • Water chemistry
    • At the site: acidity, dissolved oxygen, and turbidity
    • In the lab: metals, nitrates, carbon, sulfates, and organic compounds
  • Aquatic biota including benthic invertebrates and periphyton

Protocol Development and Status

The Rocky Mountain Network Streams protocol methods are largely derived from well-established and existing protocols developed by Rocky Mountain Network partners, including the U.S. Environmental Protection Agency (EPA), the U.S. Geological Survey (USGS), and the Montana Department of Environmental Quality (MT DEQ). The application of standardized protocols across the Rocky Mountain Network and partner stream monitoring sites facilitates comparison of streams and rivers within an ecoregion. The Rocky Mountain Network protocol is currently (August 2014) undergoing final peer review. The draft protocol is available from the Rocky Mountain Network Program Manager. We monitor streams annually using this protocol in Glacier National Park, Grant-Kohrs Ranch National Historic Site, Little Bighorn Battlefield National Monument, and Rocky Mountain National Park. In the future, we will implement stream monitoring in Great Sand Dunes National Park and Preserve as well.

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Last Updated: December 30, 2016 Contact Webmaster