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Interannual and seasonal variability in short-term grazing impact of Euphausia superba in nearshore and offshore waters west of the Antarctic Peninsula Ross, R.M.; Quetin, L.B.; Haberman, K.L. (1998). Interannual and seasonal variability in short-term grazing impact of Euphausia superba in nearshore and offshore waters west of the Antarctic Peninsula. J. Mar. Syst. 17(1-4): 261-273. https://dx.doi.org/10.1016/S0924-7963(98)00042-6 In: Journal of Marine Systems. Elsevier: Tokyo; Oxford; New York; Amsterdam. ISSN 0924-7963; e-ISSN 1879-1573, meer Ook verschenen in: Le Fèvre, J.; Tréguer, P. (Ed.) (1998). Carbon Fluxes and Dynamic Processes in the Southern Ocean: Present and Past. Selected papers from the International JGOFS Symposium, Brest, France, 28-31 August 1995. Journal of Marine Systems, 17(1-4). Elsevier: Amsterdam. 1-619 pp., meer

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Beschikbaar in	Auteurs
VLIZ: Non-open access 288471 [ aanvragen ]

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Trefwoorden

Aquatic communities > Plankton > Phytoplankton Behaviour > Feeding behaviour > Grazing Fauna > Aquatic organisms > Aquatic animals > Shellfish > Marine organisms > Marine crustaceans Ingestion Organic compounds > Carbohydrates > Glycosides > Pigments > Photosynthetic pigments > Chlorophylls Population characteristics > Biomass Trophic relationships Euphausia superba Dana, 1850 [WoRMS] PSW, Antarctica, Antarctic Peninsula [Marine Regions] Marien/Kust

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Auteurs		Top
Ross, R.M. Quetin, L.B. Haberman, K.L.

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Abstract

Our focus in this paper is the interaction between macrozooplanktonic grazers and primary producers, and the interannual and seasonal variability in the Palmer Long-Term Ecological Research (Palmer LTER) study region from Anvers Island to Adelaide Island. Short-term grazing estimates are calculated by integrating (1) theoretical and experimental estimates of ingestion rates in response to the standing stock of phytoplankton, and (2) field measurements of phytoplankton standing stock and grazer biomass. Field data come from three austral summer cruises (January/February of 1993, 1994, and 1995) and one sequence of seasonal cruises (summer, fall and winter 1993). The relative and absolute abundance of the dominant macrozooplankton grazers, Euphausia superba and Salpa thompsoni, varied by at least an order of magnitude on the spatial and temporal scales observed. Mean grazing rates ranged from 0.4 to 9.0 μg chlorophyll m−2 h−1 for the Antarctic krill and salp populations over the three summer cruises. This leads to variability in the flow of carbon from the primary producers through the grazers on the same scales. Temporal and spatial variability in grazing impact and faecal pellet production are high.

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