Lake Quinault Nutrient Enrichment

Salmonid Habitat Restoration and Acquisition

Project ID	2009-3
Recovery Domains	-
Start Date	01/01/2010
End Date	06/30/2011
Year	2009
Status	Completed
Last Edited	05/01/2025

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Description

The project elements funded by the grant included 1) fertilizing Lake Quinault with liquid nitrogen and phosphorus fertilizers, 2) monitoring of a suite of physical, biological and chemical variables relevant to lake nutrient enrichment (Ashley and Stockner 2003), 3) data entry, data QA/QC and database management, and 4) equipment maintenance/repair and operating expenses.
The prescribed nutrient load was applied weekly by boat from early March 2010 through mid-October to the epilimnion of Lake Quinault. The prescription of liquid fertilizers was: urea-ammonium nitrate (32-0-0 = 32.8 metric tons) and ammonium polyphosphate (10-34-0 = 6.8 metric tons); nitrogen to phosphorus ratio was 11:1 (wt:wt).
Monitoring, designed to measure sentinel variables that enable scientists to identify changes in the production cycles of the lake (Stockner 1981, 1987, Shortreed and Stockner 1985), took the form of bi-weekly limnology sampling and analysis for nutrients, and tow-netting for sockeye fry. Limnology sampling occurred from early March to October, and tow-netting occurred September to November. Equipment maintenance and calibration, data entry, and quality control measures were performed on schedule.

Project Benefit

The project benefits (objectives) are 1) supplement natural nutrient loads to Lake Quinault and 2) improve trophic level productivity and lake carrying capacity for sockeye fry. Increased primary productivity is the most consistent measure of nutrient supplementation response in lakes. The prescribed nutrient load is equivalent to a yield of 0.6 ug/L chlorophyll a biomass.
The QIN will analyze and evaluate the data collected to identify seasonal productivity and report the trophic state of Lake Quinault.

Source

Funds

PCSRF

$110,420

Report Total:

$110,420

Worksites

20117771

Worksite Identifier: 20117771
Start Date: 01/01/2010
End Date: 12/31/2010

Area Description

No Area Description data was found for this worksite.

Location Information

Basin: Washington Coastal (171001)
Subbasin: Queets-Quinalt
Watershed:
Subwatershed:

State: Washington
Recovery Domain:
Latitude: 47.47288
Longitude: -123.868165

ESU

Quinault Lake Sockeye Salmon ESU

Map

Photos

Metrics

C.0 Salmonid Habitat Restoration and AcquisitionY (Y/N)

. . C.0.a Habitat restoration and acquisition funding 110,420.00
. . C.0.b Length of stream treated/protected .00
. . C.0.c
Project identified in a Plan or Watershed Assessment

Upper Quinault River Habitat Restoration Plan
. . C.0.d.1 Project Monitoring (LOV)
. . C.0.d.2 Monitoring Location (LOV)

. . C.0.d.3

Monitoring text (from Phase I)

The monitoring is designed to measure sentinel variables that enable scientists to identify changes in the production cycles of the lake (Stockner 1981, 1987, Shortreed and Stockner 1985). This information will chronicle changes in abundance and biomass of major plankton components. Shifts in abundance of species and/or assemblages will signal changes in production, carbon flow, and the foodweb. The monitoring will also provide data to identify physical influences that impact lake productivity (e.g. turbidity influence on euphotic zone depth).

. . C.7 Water Quality ProjectY (Y/N)
- . . . . C.7.a Water quality funding 110,420.00
- . . . . C.7.b.1 Total acres of area treated for water quality 3,700.0
- . . . . C.7.b.2 Total acre feet of water treated for water quality0 (Acre feet)
- . . . . C.7.c Water Quality Limitation Treated (LOV)
- . . . . C.7.g.1 Carcass or nutrient placementY (Y/N)
  - . . . . . . C.7.g.2 Select the type of nutrient used (LOV)
  - . . . . . . C.7.g.3 Pounds (Lbs) of carcasses, fish meal bricks, analog or other fertilizer placed in or along stream0 (lbs)
  - . . . . . . C.7.g.4 Carcasses placed in or along stream 0
  - . . . . . . C.7.g.5 Miles of stream treated with nutrients .00
  - . . . . . . C.7.g.6 Acres treated with nutrients 3,700.0