10 
8 - 
3 
oo 
S 6 - 
£ 
<D A 
JD 4 - 
*5 2 - 
cl L 
<D 
Q 
0 - 
0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 
K d 
Figure 11.7 Relationship between Z marina maximum depth limit (m below MSL) and kj. Filled 
circles represent data from Duarte (1991) and hollow circles represent data from the Yaquina 
Estuary. 
• • 
O • Q 
0 °?D 
"°°° % 
- ®°o° 
• °°: 
• • 
o 
>° 
O o°6> 
O 
& 
O O 
8 
00 
o 
o 
8 
o 
e 
8 
Table 11.1 Comparison of mean and range of percent of water column surface irradiance needed 
to maintain Z. marina at its colonization depth from published data and from Yaquina Estuary 
data. SE = standard error. 
Range 
Source 
Mean 
N 
Max 
Min 
Duarte (1991) 
20.5 
29 
43.9 
4.7 
Current Study 
12.6 
64 
68.3 
7.2 
Batiuk et al. (2000) 
22 a 
a Value is not a mean but according to the authors is based on an analysis of literature and on an 
evaluation of monitoring and modeling research. 
81 
n 
