Abstract
The southern California Current Ecosystem (CCE) is a dynamic eastern boundary current ecosystem that is forced by ocean-atmosphere variability on interannual, multidecadal, and long-term secular time scales. Recent evidence suggests that apparent abrupt transitions in ecosystem conditions reflect linear tracking of the physical environment rather than oscillations between alternative preferred states. A space-for-time exchange is one approach that permits use of natural spatial variability in the CCE to develop a mechanistic understanding needed to project future temporal changes. The role of (sub)mesoscale frontal systems in altering rates of nutrient transport, primary and secondary production, export fluxes, and the rates of encounters between predators and prey is an issue central to this pelagic ecosystem and its future trajectory because the occurrence of such frontal features is increasing. © 2013 by The Oceanography Society. All rights reserved.
Highlights
The California Current Ecosystem (CCE) is a coastal upwelling biome that forms the eastern limb of the large-scale gyral circulation of the North Pacific Ocean
The CCE Long Term Ecological Research (CCE LTER) site is located in the southern sector of the CCE where there is an exceptional record of ocean observations, thanks to CalCOFI, in its seventh decade of sampling
Ecosystem dynamics in the CCE region are influenced by oceanic and atmospheric processes acting on spatial scales that vary from Pacific basin-wide, to regional-scale forcing, to energetic mesoscale and submesoscale (1–10 km) processes
Summary
The southern California Current Ecosystem (CCE) is a dynamic eastern boundary current ecosystem that is forced by ocean-atmosphere variability on interannual, multidecadal, and long-term secular time scales. Recent evidence suggests that apparent abrupt transitions in ecosystem conditions reflect linear tracking of the physical environment rather than oscillations between alternative preferred states. A space-for-time exchange is one approach that permits use of natural spatial variability in the CCE to develop a mechanistic understanding needed to project future temporal changes. The role of (sub)mesoscale frontal systems in altering rates of nutrient transport, primary and secondary production, export fluxes, and the rates of encounters between predators and prey is an issue central to this pelagic ecosystem and its future trajectory because the occurrence of such frontal features is increasing
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