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

  • Creator: Stanley V. Gregory, Ivan Arismendi
  • PI: Ivan Arismendi
  • Originator: Stanley V. Gregory
  • Other researchers: Randall C. Wildman, Linda R. Ashkenas, Lauren Elizabeth Zatkos, Dave Leer
  • Dates of data collection: Oct 6 1987 - Sep 5 2019
  • Data collection status: Study continues and further data collection is planned
  • Data access: Online
  • DOI:
  • Last update: Feb 25 2020 (Version 14)
<Citation>     <Acknowledgement>     <Disclaimer>    
Gregory, S.; Arismendi, I. 2020. 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: Accessed 2020-10-21.
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.
Populations of West Slope cutthroat trout (Onchorhyncus clarki clarki) in two standard reaches of Mack Creek in the H.J. Andrews Experimental Forest have been monitored since 1987. Monitoring of Pacific Giant Salamanders, Dicamptodon tenebrosus began in 1993. 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. Additionally, a set of channel measurements are taken with each sampling. 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 5 2019)METADATADATA
Annual survey of aquatic vertebrates, numbers, sizes
2Habitat dimensions (Oct 6 1987 - Sep 5 2019)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)