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Fig. 1. Mesozooplankton biomass (mg C m 3 ) in the upper 150 m water column along Line P during 4 cruises in 1996 and 1997.

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15 Fig. 1. Mesozooplankton biomass (mg C m 3 ) in the upper 150 m water column along Line P during 4 cruises in 1996 and Error bars are 1 standard deviation calculated from 3 net hauls. Refer to map in Whitney and Freeland (1999) for station locations. Biomass samples were not collected at stations and times with no associated biomass bar.Whitney and Freeland (1999)

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17 Fig. 3. Neocalanus plumchrus vertical distribution and stage structure at OSP during winter, spring, and summer, day and night. No N. plumchrus were present at station P04 during periods sampled.

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24 CopépodeSalpe Taille<<1mm3-5mm Vitesse de sedimentation (m.j -1 ) 4-100~1500 Chlorophylle a Phaeopigments Salpe Cyclosalpa bakeri Abondance relative (%) Copépode Neocalanus cristatus Abondance relative (%) Composition pigmentaire des pelotes fécales

25 Transport passif de matière biogène Contribution des pelotes fecales Flux de Matière Organique Contribution des copépodes au pool de pelotes fécales Phytoplancton (%)Fèces (%)(%) Zone côtière Station Papa HNLC >100

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