Gulf stream cold core rings: large-scale interaction sites for open ocean plankton communities

Wiebe, Peter H.; Hulburt, Edward M.; Carpenter, Edward; Jahn, Andrew E.; Knapp, George P.; Boyd, Steven H.; Ortner, Peter B.; Cox, James L.

doi:10.1016/s0011-7471(76)80015-0

Cited by 42 publications

(36 citation statements)

References 9 publications

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“…Surface living species in the Antarctic occur commonly in deep waters across the south and north Pacific and are occasionally found in surface waters (David, 1958;Alvarino, 1965). Alternatively, as happens in other frontal systems (Wiebe et al, 1976), the Polar Front, while meandering across the Pacific near South America, may form cold rings which transport endemic Antarctic plankton communities into warmer regions as they fade away in the course of several months. Further-PLANKTON OF CHILEAN FJORDS: TRENDS AND LINKAGES 71 (Baker, 1959).…”

Section: Linkages In a Spatial Gradientmentioning

confidence: 99%

Plankton of Southern Chilean fjords: trends and linkages

Antezana¹

1999

Sci. Mar.

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SUMMARY: The present paper compiles and reviews past and recent results from Magellan and Fuegian fjords for an overview of the planktonic assemblage there. It first examines linkages to local, adjacent and remote environments. The plankton assemblage presents deviations from the biota of the Magellan biogeographic Province, where the occasional presence of Antarctic species is related to oceanographic phenomena at the Polar Front. Complex bathymetric and hydrographic features within the fjords suggest that the plankton is rather isolated. Adaptations and constraints for population survival, and the role of diel migrators and gregarious zooplankters with regard to bentho-pelagic coupling are discussed. Results on seasonal differences in the plankton of the largest and most isolated basin of the Strait of Magellan are compiled. In spring the plankton was dominated by large diatoms suggesting a short food chain where most of the phytoplankton bloom goes to the bottom, to the meroplankton and to a few dominant holoplankters. In summer, the phytoplankton was dominated by picoand nanophytoplankton suggesting a more complex food web mediated by a bacterial loop. High abundance of holo-and meroplanktonic larvae coincided with spring blooming conditions. Key words: Estuarine, Subantarctic, adaptations, patterns, seasonal, migration, food webs. RESUMEN: PLANCTON DE LOS FIORDOS DEL SUR DE CHILE: TENDENCIAS Y CONEXIONES. -Este trabajo compila y revisa los resultados pasados y recientes de los fiordos fueguinos y magallánicos para proporcionar una visión integral de la comunidad planctónica. Primero se examinan las conexiones con los ambientes locales adyacentes y remotos. La comunidad planctónica presenta desviaciones de la biota de la Provincia biogeográfica Magallánica, donde la presencia ocasional de especies antárticas se relaciona con fenómenos oceanográficos en el Frente Polar. Rasgos batimétricos e hidrográficos complejos en los fiordos sugieren que el plancton está más bien aislado. Se discuten las adaptaciones y limitaciones para la supervivencia poblacional y el papel de los migradores diarios y del zooplancton gregario con respecto al acoplamiento bentopelágico. Se resumen los resultados sobre diferencias estacionales en el plancton de la más vasta y aislada cuenca del Estrecho de Magallanes. En primavera, el plancton estuvo dominado por diatomeas grandes, sugiriendo una cadena trófica corta, en la que la mayor parte de la biomasa producida va al fondo, al meroplancton y a unos pocos organismos dominantes del holoplancton. En verano, el fitoplancton estuvo dominado por pico-y nanofitoplancton, sugiriendo una red trófica más compleja mediada por un bucle bacteriano. La gran abundancia de larvas holo-y meroplanctónicas coincidió con las condiciones de proliferación primaveral.

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Section: Linkages In a Spatial Gradientmentioning

confidence: 99%

Plankton of Southern Chilean fjords: trends and linkages

Antezana¹

1999

Sci. Mar.

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“…Because all the biological and physico-chemical attributes of rings do not decay in phase (Wiebe et al 1976a), by observing aDCM in a ring and in the surrounding waters it appeared possible to separate the effects of some of the factors held to be critical to DCM formation and maintenance.…”

Section: General Introductionmentioning

confidence: 99%

“…An overview of the phytoplankton, zooplankton, and midwater fish populations inhabiting cold core rings has been given by Wiebe et al (1976a). The results of that study indicated that mean zooplankton biomass in the upper 750-800 m of rings between 3 and 10 to 12 months of age was consistently higher than that in the surrounding Sargasso Sea.…”

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confidence: 99%

Investigations into the seasonal deep chlorophyll maximum in the western North Atlantic, and its possible significande to regional food chain relationships

Ortner¹

1977

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“…decapods, and fishes and abundance of tunicates (Tranter et al 1980(Tranter et al , 1983Brandt 198 1;Brandt et al 198 1;Griffiths and Brandt 1983). These eddies may thus be responsible for much of the large-scale patchiness in pelagic distributions in the western Tasman Sea and may be functionally analogous to Gulf Stream cold-core rings in the western North Atlantic (Wiebe et al 1976).…”

Section: Discussionmentioning

confidence: 99%

Pelagic squid associationswith a warm-core eddy of the East Australian Current

Brandt¹

1983

Mar. Freshwater Res.

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Cephalopods were sampled at night by midwater trawling in the upper 500 m in and near warmcore eddy F during summer. In all, 29 species (1019 specimens) were caught. Of the five dominant species, the squid Pterygioteuthis giardi and Brachioteuthis riisei were most numerous inside the eddy and Abraliopsis gilchristi and Pterygioteuthis gemmata had length-frequency distributions that were significantly larger outside than inside the eddy. A. gilchristi was also concentrated in warmer water and Pyroteuthis margaritifera was more common at 250 m than at shallower depths. Cluster analysis established a clear association of overall composition and relative abundances of cephalopod species with water temperature and location with respect to the eddy.

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Gulf stream cold core rings: large-scale interaction sites for open ocean plankton communities

Cited by 42 publications

References 9 publications

Plankton of Southern Chilean fjords: trends and linkages

Plankton of Southern Chilean fjords: trends and linkages

Investigations into the seasonal deep chlorophyll maximum in the western North Atlantic, and its possible significande to regional food chain relationships

Pelagic squid associationswith a warm-core eddy of the East Australian Current

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