Prospect Lake Plant Survey Nov 2015:
Oct 25, 2015 Plant samples taken at different depths, different sites.
Pat Carfra, Scott Emerson, & Mike Grew, a dark photo on a cloudy day. Forecast was for rain, but we were lucky.
examples of how we bagged our samples, clearly labelled regarding site location, depth [2 m., 4m. & 6m.] and names of plants.
Here are the plant samples, as we collected them.
Water testing in Prospect Lake
The Secchi disk, as created in 1865 by Angelo Secchi, is a plain white, circular disk (30 cm in diameter or approximately 12 inches) used to measure water transparency in bodies of water. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity. Since its invention the disk has also been used in a modified, smaller 20 cm diameter, black and white design to measure freshwater transparency. [http://en.wikipedia.org/wiki/Secchi_disk ]
3 July 2014. Secchi disc readings: 1st reading = 4 meters/ 79 cm; 2nd reading = 5 m./ 10 cm.
27 July 2015. Secchi disc readings: 1st reading @ 3 meters/70 cm ; 2nd reading @ 3 meters/65 cm.
Macrophyte Testing on Prospect Lake: Sept 2013
Submitted by Angeline Tillmanns: [report below]
All but one species we plucked out of the lake were native. The species of ‘grass’ with the curly tips, Vallisneria americana, was introduced to the pacific northwest as a food source for waterfowl and as habitat for fish. Luckily it is non-invasive.
