Climatic Warming and the Decline of Zooplankton in the California Current
- 3 March 1995
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 267 (5202) , 1324-1326
- https://doi.org/10.1126/science.267.5202.1324
Abstract
Since 1951, the biomass of macrozooplankton in waters off southern California has decreased by 80 percent. During the same period, the surface layer warmed—by more than 1.5°C in some places—and the temperature difference across the thermocline increased. Increased stratification resulted in less lifting of the thermocline by wind-driven upwelling. A shallower source of upwelled waters provided less inorganic nutrient for new biological production and hence supported a smaller zooplankton population. Continued warming could lead to further decline of zooplankton.Keywords
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