Table 1 Data sources.

From: A database of georeferenced nutrient chemistry data for mountain lakes of the Western United States

Source ID Region Origin or Reference Number of Lakes* Time Period
s1 Sierras 21 50 2007–2008
s2 Rockies 22 5 2010
s3 11 Western states WQ Portal 1,105 1964–2016
s4-s10 USFS regions 1–6 FED Database 1,163 1973–2012
s11 Rockies NPS ROMN Network Water Quality Database 49 1975–2004
s12 Rockies 23 39 2006
s13 Sierras NPS SIEN Network mountain lake monitoring data 76 2008–2013
s14 Klamath mountains NPS KLMN mountain lake monitoring data 35 2013
s15 Cascades USGS 90 1989–1999
s16 Cascades 24 10 2009–2010
s17 Cascades, Olympics NPS NCCN mountain lake monitoring data 184 1988–2015
s18 Western US Western Lakes Survey 749 1985
s19 11 Western States National Lakes Assessment (2007) 298 2007
s20 Western US WACAP database25 10 2003–2005
s21 Rockies 26 6 2008–2012
s22 Cascades 27 13 2013–2014
s23 Rockies J. Brahney, personal communication 29 2009–2010
s24 Rockies 28 6 2011–2012
s25 11 Western States National Lakes Assessment (2012) 323 2012
  1. NOTE: all data source files used to create the database are included in the GLNC database appendix.
  2. * number of lakes within the data source with data that met the criteria listed above; note that some lakes are included in multiple data sources.
  3. † The original data sources includes data for the contiguous U.S, but only data from 11 Western U.S. states were incorporated into the GLNC database.