Zooplankton in the Upwelling Fronts off Pt. Conception, California

Sharon L Smith, B. H. Jones, L. P. Atkinson, K. H. Brink

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Surface maps of selected taxa of zooplankton were made off Pt. Conception, California, during three contrasting upwelling situations: moderate upwelling, strong upwelling, and downwelling. Number of taxa and number of individuals decreased with increasing upwelling intensity, indicating replacement of richer surface waters by relatively impoverished subsurface waters. The exception to this pattern was in copepodid stage V of Calanus pacificus which increased in numbers nearshore as upwelling strength increased. Since copepodid V is the deep-living, diapausing stage of this copepod, its increase in numbers is consistent with the upward movement of deep water and the life cycle of C. pacificus. Frontal zones always had more individuals than non-frontal zones, and these were primarily copepod nauplii. Estimated ingestion by copepod nauplii and Calanus pacificus in frontal zones during upwelling was twice the ingestion by these taxa outside the frontal zones, suggesting that the frontal zones associated with upwelling off Pt. Conception are sites of enhanced secondary production.

Original languageEnglish
Pages (from-to)195-213
Number of pages19
JournalElsevier Oceanography Series
Volume42
Issue numberC
DOIs
StatePublished - Dec 1 1986
Externally publishedYes

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zooplankton
upwelling
secondary production
downwelling
life cycle
deep water
replacement
surface water
water

ASJC Scopus subject areas

  • Oceanography

Cite this

Zooplankton in the Upwelling Fronts off Pt. Conception, California. / Smith, Sharon L; Jones, B. H.; Atkinson, L. P.; Brink, K. H.

In: Elsevier Oceanography Series, Vol. 42, No. C, 01.12.1986, p. 195-213.

Research output: Contribution to journalArticle

Smith, Sharon L ; Jones, B. H. ; Atkinson, L. P. ; Brink, K. H. / Zooplankton in the Upwelling Fronts off Pt. Conception, California. In: Elsevier Oceanography Series. 1986 ; Vol. 42, No. C. pp. 195-213.
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