Bottom-up ecosystem trophic dynamics determine fish production in the Northeast Pacific
Abstract
We addressed the question of bottom-up versus top-down control of marine ecosystem trophic interactions by using annual fish catch data and satellite-derived (SeaWiFS) chlorophyll a measurements for the continental margin of western North America. Findings reveal a marked alongshore variation in retained primary production that is highly correlated with the alongshore variation in resident fish yield. The highest productivity occurs off the coasts of Washington and southern British Columbia. Zooplankton data for coastal British Columbia confirm strong bottom-up trophic linkages between phytoplankton, zooplankton, and resident fish, extending to regional areas as small as 10,000 square kilometers.
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Upwelling of cool, nutrient-rich waters likely provides the main source of primary productivity to sustain the growth of gelatinous zooplankton populations upon which Mola prey.
“Upwelling of cool, nutrient-rich waters likely provides the main source of primary productivity to sustain the growth of gelatinous zooplankton populations upon which Mola prey (Ware and Thomson, 2005).”
From Oceanographic determinants of ocean sunfish (Mola mola) and bluefin tuna (Thunnus orientalis) bycatch patterns in the California large mesh drift gillnet fishery (2017) · cites this paper as Ware and Thomson, 2005
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- Authors
- Ware, D. M., & Thomson, R. E.
- Affiliations
- University of British Columbia (CA)
- Venue
- Science
- Published
- 2005-05-27
- Volume
- 308
- Issue
- 5726
- Pages
- 1280-1284
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2018580425
- Cited by
- 668
- References
- 0
- Citations by year
- 2026: 31 · 2025: 15 · 2024: 16 · 2023: 28 · 2022: 29 · 2021: 36 · 2020: 17 · 2019: 29 · 2018: 32 · 2017: 32 · 2016: 21 · 2015: 48 · 2014: 34 · 2013: 42 · 2012: 50
- FWCI
- 27.85
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Environmental Science › Global and Planetary Change › Marine and fisheries research
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Marine and coastal ecosystems
- Physical Sciences › Earth and Planetary Sciences › Oceanography › Oceanographic and Atmospheric Processes
- Keywords
- bottom-up control, top-down control, trophic interactions, fish production, primary production, chlorophyll a, zooplankton, phytoplankton, marine ecosystem productivity, alongshore variation, continental margin, western North America, SeaWiFS
- MeSH terms
- Chlorophyll A, Animals, Chlorophyll, Climate, Fishes, North America, Pacific Ocean, Phytoplankton, Population Density, Seawater, Zooplankton, Ecosystem, Biomass, Food Chain, Animal Migration, Biodiversity
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