Zooplankton anomalies in the California Current system before and during the warm ocean conditions of 2005
Abstract
Zooplankton in the California Current had large anomalies in biomass and composition in 2005. The zone most strongly affected extended from northern California to southern British Columbia, where zooplankton biomass was low from spring through autumn, community composition showed reduced dominance by northern origin taxa, and life cycles of some species shifted to earlier in the year. Although similar anomalies have previously been observed over the entire California Current system during strong El Niño events, the 2005 zooplankton anomalies were more localized, initiated by a combination of very warm temperatures (since early 2003), plus weak and late upwelling, and low phytoplankton productivity in spring and early summer of 2005. However, the zooplankton anomalies persisted longer: through the remainder of 2005 and into 2006.
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In 2005 in the California Current, a significant delay in the spring transition appears to have led to ecosystem changes affecting primary production, zooplankton, fish, birds, and mammals.
“This was particularly evident in 2005 in the California Current, when a significant delay in the spring transition [77,78] appears to have led to ecosystem changes affecting primary production [79], to zooplankton [80], to fish, birds, and mammals [81][82][83].”
From Anticipated Effects of Climate Change on Coastal Upwelling Ecosystems (2015) · cites this paper as [80]
Cites
Sydeman, W. J., Bradley, R. W., Warzybok, P., Abraham, C. L., Jahncke, J., Hyrenbach, K. D., Kousky, V., Hipfner, J. M., & Ohman, M. D. (2006) · Geophysical Research Letters · doi:10.1029/2006gl026736 · Cited by 191 · see citing works
Self-citationLong-term changes in pelagic tunicates of the California Current
Lavaniegos, B. E., & Ohman, M. D. (2003) · Deep Sea Research Part II: Topical Studies in Oceanography · doi:10.1016/s0967-0645(03)00132-2 · Cited by 158 · see citing works
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Research works printed but not linked: 17
- 10.1029/2006GL026614 · DOI
- 10.1126/science.199.4335.1302 · DOI
- 10.1029/2006GL026782 · DOI
- 10.3354/meps277147 · DOI · Paper page
- 10.1029/2006GL027072 · DOI
- 10.1139/f01-009 · DOI
- 10.1016/j.dsr2.2004.05.011 · DOI
- 10.1126/science.281.5374.210 · DOI
- Ohman M. D. andP. E.Smith(1995) A comparison of zooplankton sampling methods in the CalCOFI time series CalCOFI Rep. 36 pp.153–158 Calif. Coop. Oceanic Fish. Invest. La Jolla Calif.
- 10.1016/S0967-0645(03)00130-9 · DOI
- Peterson W. T., 1975, Year‐to‐year variations in the planktology of the Oregon upwelling zone, Fish. Bull., 73, 642
- 10.1029/2003GL017528 · DOI
- 10.3354/meps215213 · DOI
- 10.1046/j.1365-2486.2002.00456.x · DOI
- 10.1029/2006GL026911 · DOI · Paper page
- 10.1029/2006GL026588 · DOI · Paper page
- 10.1086/320865 · DOI
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Anticipated Effects of Climate Change on Coastal Upwelling Ecosystems
Bakun, A., Black, B. A., Bograd, S. J., García-Reyes, M., Miller, A. J., Rykaczewski, R. R., & Sydeman, W. J. (2015) · Current Climate Change Reports · doi:10.1007/s40641-015-0008-4 · Cited by 470 · see citing works
- Authors
- Mackas, D. L., Peterson, W. T., Ohman, M. D., & Lavaniegos, B. E.
- Affiliations
- Fisheries and Oceans Canada (CA)
- NOAA National Marine Fisheries Service (US)
- Scripps Institution of Oceanography (US)
- Centro de Investigación Científica y de Educación Superior de Ensenada (MX)
- Corresponding author
- Mackas, D. L.
- Venue
- Geophysical Research Letters
- Publisher
- American Geophysical Union (AGU)
- Published
- 2006-11
- Volume
- 33
- Issue
- 22
- ISSN
- 0094-8276 (ISSN-L)
- 1944-8007
- OpenAlex
- W2041798110
- Cited by
- 124
- References
- 2
- Citations by year
- 2026: 3 · 2025: 3 · 2024: 2 · 2023: 2 · 2022: 3 · 2021: 5 · 2020: 5 · 2019: 7 · 2018: 3 · 2017: 2 · 2016: 6 · 2015: 3 · 2014: 6 · 2013: 15 · 2012: 6
- FWCI
- 8.97
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geophysical Research Letters (publishedVersion)
- eScholarship (California Digital Library) (submittedVersion)
- Funders
- Consejo Nacional de Ciencia y Tecnología
- Topics
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine Plankton and Biogeochemistry
- Life Sciences › Agricultural and Biological Sciences › Aquatic Science › Marine and fisheries research
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Keywords
- California Current, zooplankton biomass, zooplankton community composition, life cycle timing, El Niño, upwelling, phytoplankton productivity, ocean warming
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