State of the Lake 2009 - Tahoe Environmental Research Center ...
State of the Lake 2009 - Tahoe Environmental Research Center ...
State of the Lake 2009 - Tahoe Environmental Research Center ...
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
BIOLOGY<br />
Algae abundance<br />
Yearly since 1984<br />
The amount <strong>of</strong> free-floating algae<br />
(phytoplankton) in <strong>the</strong> water is<br />
determined by measuring <strong>the</strong><br />
concentration <strong>of</strong> chlorophyll a.<br />
Chlorophyll a is a common measure<br />
Chlorophyll<br />
(micrograms per liter)<br />
1.8<br />
1.6<br />
1.4<br />
1.2<br />
1.0<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0.0<br />
1984<br />
1986<br />
TAHOE: STATE OF THE LAKE REPORT <strong>2009</strong><br />
<strong>of</strong> phytoplankton biomass. Though<br />
algae abundance varies annually, it<br />
does not show a long-term increase.<br />
The annual average value for 2008 was<br />
0.63 micrograms per liter. The average<br />
1988<br />
1990<br />
1992<br />
1994<br />
1996<br />
annual chlorophyll a level in <strong>Lake</strong><br />
<strong>Tahoe</strong> has remained relatively uniform<br />
since 1996.<br />
1998<br />
2000<br />
2002<br />
2004<br />
2006<br />
2008<br />
10.2
Change language