Interaction of currents and vertical migration in maintaining Calanus marshallae in the Oregon upwelling zone—a simulation

Wroblewski, J. S.

doi:10.1016/0198-0149(82)90001-2

Cited by 96 publications

(53 citation statements)

References 13 publications

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“…In the MLC model (Botsford et al 2003(Botsford et al , 2006 zooplankton are assumed to have no migratory behavior, in which case optimal conditions for secondary production are achieved for variability in wind forcing on time scales comparable to those of the organisms, but much longer than observed wind variability. This model result argues that, in reality, longer-lived zooplankton populations counter the potential advective loss of shelf productivity through ontogenetic behavior (e.g., Peterson et al 1979) or diel vertical migration behavior (Wroblewski 1982;Peterson 1998).…”

Section: Zooplankton Populationsmentioning

confidence: 98%

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

Largier

Lawrence

Roughan

et al. 2006

Deep Sea Research Part II: Topical Studies in Oceanography

107

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The "Wind Events and Shelf Transport" (WEST) program was an interdisciplinary study of coastal upwelling off northern California in 2000 was comprised of modeling and field observations. The primary goal of WEST was to better describe and understand the competing influences of wind forcing on planktonic productivity in coastal waters. While increased upwelling favorable winds lead to increased nutrient supply, they also result in reduced light exposure due to deeper surface mixed layers and increased advective loss of plankton from coastal waters. The key to understanding high levels of productivity, amidst these competing responses to wind forcing, is the temporal and spatial structure of upwelling. Temporal fluctuations and spatial patterns allow strong upwelling that favors nutrient delivery to be juxtaposed with less energetic conditions that favor stratification and plankton blooms.

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Section: Zooplankton Populationsmentioning

confidence: 98%

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

Largier

Lawrence

Roughan

et al. 2006

Deep Sea Research Part II: Topical Studies in Oceanography

107

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show abstract

“…However, the necessary observations and understanding of depth selection and foraging behavior in marine zooplankton are extremely limited. Thus, for example, modeling studies of mesozooplankton population dynamics embedded in multidimensional ocean circulation schemes repeatedly identify controls of vertical distribution and migration behavior (that is, depth selection) by individual zooplankters as essential information that is usually unknown (Batchelder et al 2002;Hannah et al 1997;Miller et al 1998;Reiss et al 2003;Werner et al 1993;Wroblewski 1982;Zakardjian et al 2003). Recent modeling work suggests that small-scale behaviors such as foraging may indeed have a large impact on the transport of zooplankters (Woodson and McManus 2007).…”

Section: Introductionmentioning

confidence: 99%

Trapping migrating zooplankton

Pierson

Frost

Thoreson

et al. 2009

Limnology & Ocean Methods

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We have developed a method to determine if individual zooplankton make short-duration migrations, on the order of meters to tens of meters in vertical extent, between food-rich surface water and deeper, food-poor water. To do this, we developed a zooplankton trapping system, consisting of paired traps to catch zooplankton migrating downward and an inverted ring net to catch zooplankton migrating upward. These two trap systems were deployed simultaneously with the openings at the same depth, to catch zooplankton crossing a particular depth horizon, and samples were immediately sorted to make morphological and physiological measurements of individuals. Initial tests showed that there were differences in the ability to capture upward-and downwardmigrating marine zooplankton. In addition, physiological (gut contents) and morphological (prosome length) characteristics of individual copepods differed between those moving in opposite directions. These data support the hypothesis that copepods make repeated nighttime forays between deeper, food-poor water and the nearsurface, food-rich waters. This is part of an ongoing study on the variability of this behavior in different conditions and over seasonal cycles, but the method may be applicable to other pelagic environments, to explore various ecological questions.

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“…Some authors have also addressed the effect of advection combined with DVM on the distribution (dispersal or retention) of zooplankton whereby the organisms take advantage of horizontal currents with vertically varying speeds and directions during their upward and downward movements (Hardy and Gunther, 1935;Wroblewski, 1982;Manuel and O'Dor, 1997;Eiane et al, 1998;Krägefsky, 2008;Krägefsky et al, 2009). …”

Section: Introductionmentioning

confidence: 99%

Acoustic insights into the zooplankton dynamics of the eastern Weddell Sea

Cisewski

Strass

2016

Progress in Oceanography

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The success of any efforts to determine the effects of climate change on marine ecosystems depends on understanding in the first instance the natural variations, which contemporarily occur on the interannual and shorter time scales. Here we present results on the environmental controls of zooplankton distribution patterns and behaviour in the eastern Weddell Sea, Southern Ocean. Zooplankton abundance and vertical migration are derived from the mean volume backscattering strength (MVBS) and the vertical velocity measured by moored acoustic Doppler current profilers (ADCPs), which were deployed simultaneously at 64°S, 66.5°S and 69°S along the Greenwich Meridian from February, 2005, until March, 2008 While these time series span a period of full three years they resolve hourly changes.A highly persistent behavioural pattern found at all three mooring locations is the synchronous diel vertical migration (DVM) of two distinct groups of zooplankton that migrate between a deep residence depth during daytime and a shallow depth during nighttime. The DVM was closely coupled to the astronomical daylight cycles. However, while the DVM was symmetric around local noon, the annual modulation of the DVM was clearly asymmetric around winter solstice or summer solstice, respectively, at all three mooring sites. DVM at our observation sites persisted throughout winter, even at the highest latitude exposed to the polar night. Since the magnitude as well as the relative rate of change of illumination is minimal at this time, we propose that the ultimate causes of DVM separated from the light-mediated proximal cue that coordinates it. In all three years, a marked change in the migration behaviour occurred in late spring (late October/early November), when DVM ceased. The complete suspension of DVM after early November is possibly caused by the combination of two factors: (1) increased availability of food in the surface mixed layer provided by the phytoplankton spring bloom, and (2) vanishing diurnal enhancement of the threat from visually oriented predators when the illumination is quasi-continuous during the polar and subpolar summer. 3Zooplankton abundance in the water column, estimated as the mean MVBS in the depth range 50 -300 m, was highest end of summer and lowest mid to end winter on the average annual cycle. However, zooplankton abundance varied several-fold between years and between locations. Based on satellite and in situ data of chlorophyll and sea ice as well as on hydrographic measurements, the interannual and spatial variations of zooplankton mean abundance can be explained by differences in the magnitude of the phytoplankton spring bloom, which develops during the seasonal sea ice retreat. Whereas the vernal ice melt appears necessary to stimulate the blooming of phytoplankton, it is not the determinator of the blooms magnitude, its areal extent and duration. A possible explanation for the limitation of the phytoplankton bloom in some years is top-down control. We hypothesize that the phytoplankton spring ...

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Interaction of currents and vertical migration in maintaining Calanus marshallae in the Oregon upwelling zone—a simulation

Cited by 96 publications

References 13 publications

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

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

Trapping migrating zooplankton

Acoustic insights into the zooplankton dynamics of the eastern Weddell Sea

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