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4.0<br />
3.5<br />
3.0<br />
Bonnet Carré<br />
Spillway Opening<br />
El Niño Drought<br />
12<br />
10<br />
Species Diversity<br />
2.5<br />
2.0<br />
1.5<br />
1.0<br />
8<br />
6<br />
4<br />
0.5<br />
0.0<br />
Nov-96<br />
Apr-97<br />
Oct-97<br />
May-98<br />
Nov-98<br />
Apr-99<br />
Oct-99<br />
May-00<br />
Jul-00<br />
Apr-01<br />
Aug-02<br />
Nov-03<br />
Apr-04<br />
Nov-04<br />
Apr-05<br />
Salinity (ppt)<br />
EW1<br />
EW2<br />
EW3<br />
EW4<br />
EW5<br />
Bot<strong>to</strong>m<br />
Salinity<br />
2<br />
0<br />
Date Sampled<br />
Figure 1. Species diversity values and average bot<strong>to</strong>m salinity level <strong>of</strong> five west <strong>to</strong> east stations<br />
across Lake <strong>Pontchartrain</strong> from 1996 – 2005 surveys.<br />
Rangia cuneata per m 2<br />
3000<br />
2500<br />
2000<br />
1500<br />
1000<br />
500<br />
0<br />
41-45 mm<br />
36-40 mm<br />
31-35 mm<br />
26-30 mm<br />
21-25 mm<br />
16-20 mm<br />
11-15 mm<br />
6-10 mm<br />
< 5 mm<br />
EW1 EW2 EW3 EW4 EW5 EW1 EW2 EW3 EW4 EW5<br />
November 2004 April 2005<br />
Figure 2. Density by size class <strong>of</strong> Rangia cuneata at five west <strong>to</strong> east stations across Lake<br />
<strong>Pontchartrain</strong> in November 2004 and April 2005.<br />
4
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