Zooplankton patch dynamics: daily gap formation over abrupt topography

Amatzia Genin*, Charles Greene, Loren Haury, Peter Wiebe, Gideon Gal, Stein Kaartvedt, Eli Meir, Connie Fey, Jim Dawson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

77 Scopus citations


Net tow and acoustic surveys of zooplankton distributions were made over and around Sixtymile Bank (110 km southwest of San Diego, California). Gaps devoid of vertically migrating zooplankton were formed every evening above the summit of the bank. Interactions between the migrating animals, their predators, physical advection and the local topography appear to determine the gap formation and dynamics. Gaps were transported downstream during the night and appeared to disintegrate slowly through vertical swimming behavior, current shear and mixing processes. Patch dynamics following gap formation, mediated by both ocean currents and animal behavior, should augment the spatial heterogeneity of zooplankton and affect marine food webs in areas where abrupt topography features are common.

Original languageEnglish (US)
Pages (from-to)941-951
Number of pages11
JournalDeep-Sea Research Part I
Issue number5-6
StatePublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Oceanography
  • Aquatic Science


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