128
Fig. S.2. Fluxes of poe, amino
acids and fatty acids out of the
euphotic zone (or the shallowest depth measured) in relation
to primary production at various locations (reproduced from
Wakeham and Lee 1993)
C. Lee
10000TI-----------------------------.
1000
100
Peru.
VERTEX II
• • VERTEX I
VERTEX III. • VERTEX IV
• PARFLUXE
• PARFLUXP
10+1-------.-------.-------.------~
0.1
10
100
1000
POCflux (mg m-2 d-1)
_ 10000,------------------------------,
~
1: u
Peru
•
!!J 1000
VERTEX II. • VERTEX I
• VERTEX IV
.~
' e ::I
~ Co
~
'" E
;t
• VERTEX III
100
• PARFLUXP
10+1-------.-------.-------,------~
10
100
1000
10000
Amino acid flux (mg m-2 d-1)
10000.------------------------------,
1000
100
VERTEX II •
VERTEX III •
Peru.
• VERTEX I
• VERTEXIV
• PARFLUXE
• PARFLUXP
10+1-------.-------.-------,------~
10
100
1000
10000
100000
Fatty acid flux (mg m-2 d-1)
seasonal changes in biological community structure and in the production by phytoplankton of certain compounds relative to others.
Fluxes of specific organic compounds vary not only seasonally, but also on much
shorter time scales. Diel patterns have been commonly observed for a wide variety of
lipid compounds and amino acids as well as POC in the Peru upwelling area (Lee and
Cronin 1982; Wakeham et al. 1983). Fluxes are usually much larger at night, and the
particles collected then are dominated by faecal pellets, suggesting that these diel
changes are related to zooplankton and anchovy vertical migration.