Aquatic Vertebrate Population Study in Mack Creek, Andrews Experimental Forest, 1987 to present

  • PI: Stanley V. Gregory
  • Originator: Stanley V. Gregory
  • Other researchers: Randall C. Wildman, Linda R. Ashkenas
  • Dates of data collection: Oct 1 1987 - Sep 8 2017
  • Data collection status: Study continues and further data collection is planned
  • Data access: Online
  • Last update: Aug 27 2018 (Version 13)
<Citation>     <Acknowledgement>     <Disclaimer>    
Gregory, S. 2018. Aquatic Vertebrate Population Study in Mack Creek, Andrews Experimental Forest, 1987 to present. Long-Term Ecological Research. Forest Science Data Bank, Corvallis, OR. [Database]. Available: (25 August 2019) DOI:
Data were provided by the HJ Andrews Experimental Forest research program, funded by the National Science Foundation's Long-Term Ecological Research Program (DEB 1440409), US Forest Service Pacific Northwest Research Station, and Oregon State University.
While substantial efforts are made to ensure the accuracy of data and documentation, complete accuracy of data sets cannot be guaranteed. All data are made available "as is". The Andrews LTER shall not be liable for damages resulting from any use or misinterpretation of data sets.
Since 1987, we have been monitoring populations of West Slope cutthroat trout (Onchorhyncus clarki clarki) in two standard reaches of Mack Creek in the H.J. Andrews Experimental Forest. Beginning in 1993, we included monitoring of Pacific Giant Salamanders, Dicamptodon tenebrosus. The two standard reaches are in a section of clearcut forest (ca. 1963) and an upstream 500 year old coniferous forest. Sub-reaches are sampled with 2-pass electrofishing, and all captured vertebrates are measured and weighed. This study constitutes one of the longest continuous records of salmonid populations on record.

Study Description Taxonomic Hierarchy Download Study Location Information: (CSV)
Download Full Documentation: (PDF)(EML)
1Vertebrate numbers and size (Oct 6 1987 - Sep 8 2017)METADATADATA
Annual survey of aquatic vertebrates, numbers, sizes
2Habitat dimensions (Oct 6 1987 - Sep 8 2017)METADATADATA
Measurements of channel units within vertebrate sampling area

 Dynamics of large wood in streams: Tagged log inventory, Mack Creek, Andrews Experimental Forest, 1985 to 2008 (GS006)