WEST: A northern California study of the role of wind-driven transport in the productivity of coastal plankton communities

Largier, John L.; Lawrence, C. Martin; Roughan, Moninya; Kaplan, David M.; Dever, Edward P.; Dorman, Clive E.; Kudela, Raphael M.; Bollens, Stephen M.; Wilkerson, Frances P.; Dugdale, Richard C.; Botsford, Louis W.; Garfield, Newell; Cervantes, B. Kuebel; Koračin, Darko

doi:10.1016/j.dsr2.2006.08.018

Cited by 107 publications

(86 citation statements)

References 81 publications

(113 reference statements)

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“…2F,G). During relaxation, currents typically were poleward, sometimes extending throughout the water column while remaining stronger near the surface, as previously described by Largier et al (1993Largier et al ( , 2006. Strong tidal and diurnal signals were present.…”

Section: Resultsmentioning

confidence: 60%

“…3C); during relaxation, surface waters originated from the southeast (Fig. 3D), as previously described (Largier et al 1993Wing et al 2003).…”

Section: Resultsmentioning

confidence: 84%

“…These interspecific differences in vertical distribution determine the extent to which larvae complete development nearshore or migrate across the continental shelf (Morgan et al 2009b,c;Morgan and Fisher 2010). Larvae of many nearshore species complete development close to shore by remaining in waters where cross-shore and alongshore flow is reduced (Largier et al 1993;Roughan et al 2006). They do this by remaining below the shallow Ekman layer at all times or rising into productive surface waters to forage only at night when offshore flow is weakest (Batchelder et al 2002;Morgan et al 2009c).…”

Section: Discussionmentioning

confidence: 99%

“…Larvae in surface waters may be passively advected southward and offshore except in the lee of headlands, where eddies may entrain them during prevailing upwelling conditions (Wing et al 1998;Lagos et al 2005;Morgan et al 2011). When winds infrequently weaken (relax) or reverse, larvae that have accumulated in the lee of a large headland (Point Reyes) during upwelling conditions are transported poleward by a coastal boundary current, which is both characterized and enhanced by warm, low-salinity surface waters originating in the large estuary of San Francisco Bay, which is located , 50 km to the south (Largier et al 1993Wing et al 2003). Only larvae of the Dungeness crab (Cancer magister) appear to be transported poleward long distances and primarily when relaxation events lasting several days occur during the recruitment season in this region (Wing et al 2003;Morgan et al 2009a).…”

mentioning

confidence: 99%

“…Although larval recruitment has been monitored for 13 yr in a region of strong, persistent upwelling on the west coast of the USA, processes responsible for inter-annual variation in recruitment to coastal populations and communities are still not resolved (Wing et al 2003;Mace and Morgan 2006a;Morgan et al 2009a). Prevailing northwesterly winds force surface waters offshore due to the Coriolis effect (Ekman transport), lowering sea level at the coast and forcing upwelling of bottom waters and southward alongshore transport (Largier et al 1993). Larvae in surface waters may be passively advected southward and offshore except in the lee of headlands, where eddies may entrain them during prevailing upwelling conditions (Wing et al 1998;Lagos et al 2005;Morgan et al 2011).…”

mentioning

confidence: 99%

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Limited recruitment during relaxation events: Larval advection and behavior in an upwelling system

Morgan

Fisher

McAfee

et al. 2012

Limnology & Oceanography

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We capitalized on a long-term record of larval recruitment and a distinctive oceanographic signature to reveal how changes in ocean conditions affect larval advection, behavior, and recruitment in a region of strong, persistent upwelling and recruitment limitation. We repeatedly sampled the vertical and horizontal distribution of a larval assemblage and ocean conditions during infrequent relaxations of prevailing upwelling winds near Bodega Bay, California. During prolonged relaxation events, a poleward, coastal, boundary current imported low-salinity surface waters that were devoid of larvae to the study area. The resident larval assemblage was restricted to cold, saline, bottom waters and pushed offshore while diel vertical migrations were suppressed. Hence, changes in oceanographic conditions strongly affected behaviorally mediated larval distributions, revealing the reason that few species recruit during relaxation events in this region. During relaxation events in upwelling regions, poleward coastal boundary currents will force larvae offshore throughout the water column at small headlands and in seaward-flowing bottom currents at straight coastlines, but recruitment may decrease markedly only near estuaries where few larvae will arrive in low-salinity surface waters. Targeted profiling of larval assemblages complements widespread monitoring of recruitment from shore and is necessary to determine how changing ocean conditions affect larval distributions, recruitment dynamics, and the connectivity of populations.

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Section: Resultsmentioning

confidence: 60%

“…3C); during relaxation, surface waters originated from the southeast (Fig. 3D), as previously described (Largier et al 1993Wing et al 2003).…”

Section: Resultsmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Limited recruitment during relaxation events: Larval advection and behavior in an upwelling system

Morgan

Fisher

McAfee

et al. 2012

Limnology & Oceanography

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Inner shelf intrusions of offshore water in an upwelling system affect coastal connectivity

Nidzieko

Largier

2013

Geophysical Research Letters

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[1] Poleward warm water flows around Point Conception are an important transport mechanism linking biogeographic provinces along central California. These flows are initiated by relaxation of upwelling winds; the intensity and duration of upwelling is an important driver of how far north warm water penetrates against the prevailing surface currents. In this paper we present evidence of offshore surface water intrusions to the inner shelf, 130 km north of Point Conception, near Cambria, California. Satellite observations show that the intrusions originate as eddies generated offshore along the upwelling front. These eddies may form as submesoscale instabilities or by interaction of upwelling centers with offshore waters. The intrusions move southern waters to the central California inner shelf further northward than is typical for a coastal relaxation plume, and therefore, inner shelf connectivity and ecology may be governed over timescales and distances longer than those set by the intermittent relaxation of upwelling winds. Citation: Nidzieko, N. J., and J. L. Largier (2013), Inner shelf intrusions of offshore water in an upwelling system affect coastal connectivity, Geophys. Res. Lett., 40,[5423][5424][5425][5426][5427][5428]

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Application of a data‐assimilative regional ocean modeling system for assessing California Current System ocean conditions, krill, and juvenile rockfish interannual variability

Schroeder

Santora

Moore

et al. 2014

Geophysical Research Letters

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To be robust and informative, marine ecosystem models and assessments require parameterized biophysical relationships that rely on realistic water column characteristics at appropriate spatial and temporal scales. We examine how hydrographic properties off California from 1990 through 2010 during late winter and spring correspond to krill and juvenile rockfish (Sebastes spp.) abundances. We evaluated coherence among temperature, salinity, depth of 26.0 potential density isopycnal, and stratification strength at regionally and monthly time scales derived from shipboard and mooring observations, and a data-assimilative Regional Ocean Model System reanalysis. The reanalysis captures spatiotemporal physical variability of coastal ocean conditions in winter and spring months and elucidates mechanisms connecting the spatial and temporal upwelling and transport dynamics on observed krill and rockfish abundances in spring. This provides evidence for a mechanistic connection between the phenology of upwelling in the California Current System and seasonal development of the shelf ecosystem.

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WEST: A northern California study of the role of wind-driven transport in the productivity of coastal plankton communities

Cited by 107 publications

References 81 publications

Limited recruitment during relaxation events: Larval advection and behavior in an upwelling system

Limited recruitment during relaxation events: Larval advection and behavior in an upwelling system

Inner shelf intrusions of offshore water in an upwelling system affect coastal connectivity

Application of a data‐assimilative regional ocean modeling system for assessing California Current System ocean conditions, krill, and juvenile rockfish interannual variability

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