Lake Tahoe Nearshore Periphyton Study

Water-Quality, Physical, and Nutrient Data

We sampled transects at a high frequency over a 10-month period on the west shore of Lake Tahoe, north of Ward Creek. All data and sample analysis results are undergoing quality assurance/quality control evaluation according to USGS protocols. Data will be uploaded into the USGS National Water Information System (NWIS). Results from Ward Creek surface water samples will also be compared to concurrent Lake Tahoe Interagency Monitoring Program (LTMP) samples for inter-laboratory comparison.

Data Collected

  • Temperature
  • Solar Radiation
  • Dissolved Oxygen
  • Specific Conductance
  • Turbidity
  • Chlorophyll-a
  • Nitrogen
  • Phosphorus

Additional Data

We are

  • tracking periphyton assemblage dynamics by estimating standing stocks of biomass,
  • identifying shifts in taxonomic structure,
  • quantifying rates of net primary productivity, and
  • assessing potential nutrient limitation.

A trend analysis will provide information about how measured parameters vary at seasonal and sub-seasonal time scales. Multivariate statistics (e.g., regression analysis, principal components analysis) will be used to determine which physical and chemical conditions are most correlated to periphyton metabolic rates and biomass.