Biology Reference
In-Depth Information
6
4
a. PC1
2
0
-2
3
b. Demersal Fish
2
1
0
3
c. Crabs
2
1
0
4
3
d. Shrimp
2
1
0
5
e. Phytoplankton
4
3
2
1980
1985
1990
1995
2000
2005
Figure 5. Changes at the interface between the ocean and bay—
prompted by seasonal, annual, and decadal shifts—all affect which
species thrive in the bay from year to year. Various common organ-
isms such as fish, crabs, and shrimp (b, c, d,) appear on the left
side of the figure, expressed in CPUE, an abundance index (catch
per unit of effort), as well as a reference to their food supply in
terms of phytoplankton (e). PC1 (a) is the index of community vari-
ability over time. On the right side of the figure, changing conditions
are shown including the North Pacific Gyre Oscillation (f), Pacific
Decadal Oscillation (g), El Niño and La Niña (h), sea surface temper-
atures (i), and coastal upwelling (j). (J. E. Cloern et al.)
