Zooplancton et micronecton estivaux des deux cents premiers m�tres en M�diterran�e Occidentale

Boucher, Jean; Thiriot, Alain

doi:10.1007/bf00347436

Cited by 24 publications

(11 citation statements)

References 7 publications

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“…of the inacroplankton (Boucher and Thiriot, 1972). were the, same, species, I found in the Sargasso Sea.…”

Section: Discussionsupporting

confidence: 76%

Nutritional ecology of Agalma okeni and other siphonophores from the epipelagic western North Atlantic Ocean

Biggs¹

1976

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“…of the inacroplankton (Boucher and Thiriot, 1972). were the, same, species, I found in the Sargasso Sea.…”

Section: Discussionsupporting

confidence: 76%

Nutritional ecology of Agalma okeni and other siphonophores from the epipelagic western North Atlantic Ocean

Biggs¹

1976

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“…For example, Centropages typicus and Temora stylifera, also very common in neritic and coastal waters, are mentioned among the dominant species only in the WMS (Vives, 1967;Boucher and Thiriot, 1972;Pinca and Dallot, 1995;Saiz et al, 1999;Fernández de Puelles et al, 2003;Gaudy et al, 2003), in the Adriatic Sea (Hure et al, 1980), and in the North Aegean Sea (SiokouFrangou et al, 2004) (Fig. 18).…”

Section: Copepodsmentioning

confidence: 99%

Plankton in the open Mediterranean Sea: a review

et al. 2010

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Abstract. We present an overview of the plankton studies conducted during the last 25 years in the epipelagic offshore waters of the Mediterranean Sea. This quasi-enclosed sea is characterized by a rich and complex physical dynamics with distinctive traits, especially in regard to the thermohaline circulation. Recent investigations have basically confirmed the long-recognised oligotrophic nature of this sea, which increases along both the west-east and the north-south directions. Nutrient availability is low, especially for phosphorous (N:P up to 60), though this limitation may be buffered by inputs from highly populated coasts and from the atmosphere. Phytoplankton biomass, as chl a, generally displays low values (less than 0.2 µg chl a l −1 ) over large areas, with a modest late winter increase. A large bloom (up to 3 µg l −1 ) is observed throughout the late winter and spring exclusively in the NW area. Relatively high biomass values are recorded in fronts and cyclonic gyres. A deep chlorophyll maximum is a permanent feature for the whole basin, except during the late winter mixing. It is found at increasingly greater depths ranging from 30 m in the Alboran Sea to 120 m in the easternmost Levantine basin. Primary production reveals a west-east decreasing trend and ranges between 59 and 150 g C m −2 y −1 (in situ measurements). Overall, the basin is largely dominated by small autotrophs, microheterotrophs and egg-carrying copepod species. The microorganisms (phytoplankton, viruses, bacteria, flagellates and ciliates) and zooplankton components reveal a considerable diversity and

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“…Siphonophores, a group of complex colonial organisms of about 160 described species, are among the most abundant predators of macroplankton and constitute an important link in pelagic food-chains (Boucher and Thiriot 1972;Alvariño 1985;Pugh 1999). These animals are strictly carnivorous, consuming mainly copepods (Purcell 1981;Pagès et al 2001), as well as euphausiids, decapods, pteropods, and fish larvae and eggs (Alvariño 1985).…”

Section: Introductionmentioning

confidence: 99%

Siphonophores off a riverine system in the southern Gulf of Mexico: factors affecting their distribution and spatial niche breadth and overlap

et al. 2008

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Environmental factors determining the spatial pattern of the whole siphonophore community, as well as the hydrological occurrence ranges, small-scale vertical distribution, and spatial niche breadth and overlap of 23 siphonophore species collected off a riverine system in the southern Gulf of Mexico were analysed. A total of 149 zooplankton samples were collected in different strata of the water column (from 0 to 100 m) over a grid of 23 oceanographic stations during low (April) and high (October) rainy periods. Temperature and salinity measurements were taken with a CTD probe. Considering both seasons, salinity fluctuated between 30.7 and 37.0, and temperature between 18.2 and 29.0°C. Under these conditions, the hydrological occurrence ranges of species were analysed. Data on siphonophore biovolumes in the upper 30-m layer were subjected to a regression tree (RT) analysis taking the zooplankton biomass, the distance to the shore, the temperature, and the salinity as predictable variables. Results of the RT analysis showed that the distance from the shore, food availability, and temperature were among the most important factors affecting siphonophore spatial distribution. Food availability had a positive influence on the siphonophores distribution, whereas temperatures higher than 28.1°C seemed to depress most siphonophore populations. Diphyes dispar moderately dominated the community and represented 30% of the total biovolume. The calycophorans Abylopsis tetragona, A. eschscholtzi, Diphyes bojani, and Chelophyes appendiculata were the most generalist species as revealed by their niche breadth values, and Enneagonum hyalinum endured the widest salinity conditions (30.7-37.0) and was mainly distributed in coastal waters. The second most abundant species, the physonect Agalma okeni, exhibited a low mean niche overlap value with the calycophoran species. We hypothesise that differences in diet composition between physonects and calycophorans are the main cause of those low niche overlap values.

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Zooplancton et micronecton estivaux des deux cents premiers m�tres en M�diterran�e Occidentale

Cited by 24 publications

References 7 publications

Nutritional ecology of Agalma okeni and other siphonophores from the epipelagic western North Atlantic Ocean

Nutritional ecology of Agalma okeni and other siphonophores from the epipelagic western North Atlantic Ocean

Plankton in the open Mediterranean Sea: a review

Siphonophores off a riverine system in the southern Gulf of Mexico: factors affecting their distribution and spatial niche breadth and overlap

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