Planktonic ostracods along the Antarctic Peninsula during the 1989/90 summer season

Kock, R.P.

doi:10.1007/bf00233141

Cited by 5 publications

(6 citation statements)

References 18 publications

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“…At the shallowest station H (depth~20 m), only A. belgicae (38%) and A. hettacra (8%) occurred. Kock (1993) suggested that A. belgicae has a preference for the neritic zone, which is consistent with this species' high frequency of occurrences in Admiralty Bay. It is worth noting that this species was first described from samples collected through holes in pack ice during both the Belgica expedition (Mü ller, 1906) and the first Discovery expedition (Brady, 1907-identified as C. inominata).…”

Section: Discussionsupporting

confidence: 69%

“…Previous studies on distribution of A. hettacra (Siegel et al, 1992;Blachowiak-Samolyk & Zmijewska, 1995) have shown that it has a distinct preference for open oceanic waters, so its occurrence in rather low abundances in the shelf area of Admiralty Bay may be the result of advection of oceanic waters into the Bay. The higher frequency of M. isocheira, relative to A. hettacra, may result from its lack of any clear preference for a particular water mass (Deevey, 1982;Kock, 1993;Blachowiak-Samolyk, 1999). There are only about half the number of published records of M. isocheira compared to A. hettacra (see charts of Blachowiak-Samolyk & Angel, 2004) probably because of its much smaller size.…”

Section: Discussionmentioning

confidence: 97%

“…The importance of the role played by the pelagic Ostracoda in oceanic ecosystems, both in the Southern Ocean and other oceans has been not fully recognised. The geographical ranges of Southern Ocean Ostracoda and their vertical distributions are well described (Hillman, 1967;Deevey, 1978;Kock, 1992Kock, , 1993Blachowiak-Samolyk & Zmijewska, 1995, 1997Blachowiak-Samolyk, 1999;Blachowiak-Samolyk & Osowiecki, 2002;Chavtur & Kruk, 2003;Drapun, 2004; see also Blachowiak-Samolyk & Angel, 2004), but few studies have focused on their life cycles. Kock (1992Kock ( , 1993 examined the population structure of halocyprids in the epipelagic zone near Antarctic Peninsula.…”

Section: Introductionmentioning

confidence: 96%

“…The geographical ranges of Southern Ocean Ostracoda and their vertical distributions are well described (Hillman, 1967;Deevey, 1978;Kock, 1992Kock, , 1993Blachowiak-Samolyk & Zmijewska, 1995, 1997Blachowiak-Samolyk, 1999;Blachowiak-Samolyk & Osowiecki, 2002;Chavtur & Kruk, 2003;Drapun, 2004; see also Blachowiak-Samolyk & Angel, 2004), but few studies have focused on their life cycles. Kock (1992Kock ( , 1993 examined the population structure of halocyprids in the epipelagic zone near Antarctic Peninsula. Blachowiak-Samolyk (2001) reported on populations in deep water in the Croker Passage and Blachowiak-Samolyk & Osowiecki (2002) studied the influence of pack-ice on the age structure of the ostracods in the Scotia Sea.…”

Section: Introductionmentioning

confidence: 96%

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A year round comparative study on the population structures of pelagic Ostracoda in Admiralty Bay (Southern Ocean)

Błachowiak‐Samołyk

Angel

2007

Hydrobiologia

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The population structures of the three dominant planktonic halocyprid Ostracoda species in Admiralty Bay (King George Island, Antarctic Peninsula) were followed throughout the course of a year in zooplankton samples collected once every three weeks from February 1993 to January 1994. The sampling was conducted at two stations: A in the central part of Admiralty Bay (400-0 m) and B in the entrance to the Bay from the Bransfield Strait (400-0 m). The samples were taken using a WP-2 net (square mouth opening of 0.196 m 2 and 200 lm mesh) hauled vertically from the bottom to the surface. Changes in the age structures of the populations of three species Alacia belgicae, Alacia hettacra and Metaconchoecia isocheira were tracked. Their population structures differed. The changes in A. belgicae suggested that it reproduces year-round, whereas both A. hettacra and M. isocheira probably complete their life cycles within a year. The cycle in A. hettacra probably starts earlier in the year than that of M. isocheira. Populations of A. belgicae and M. isocheira were more advanced in their development at station A, than at station B, but A. hettacra was more advanced at the latter. Advection appears to play a role in maintaining the populations in the shelf waters. Comparisons between populations in the shelf area (Admiralty Bay) and in open ocean waters (Croker Passage) show that the M. isocheira population is older in shelf water whereas the age structure of A. belgicae population is not influenced by the locality.

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Section: Discussionsupporting

confidence: 69%

Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 96%

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A year round comparative study on the population structures of pelagic Ostracoda in Admiralty Bay (Southern Ocean)

Błachowiak‐Samołyk

Angel

2007

Hydrobiologia

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“…This difference may result from the disparity in the number of stations sampled in each season (for details see ''Materials and methods'' section), but more likely, explanation may lie in the diets of the Ostracoda. They are detritivores (Angel, 1983a, b;Kock, 1993), so they are much less dependent of the timing of Arctic phytoplankton bloom than herbivorous taxa.…”

Section: Environmental Influence On Pelagic Ostracoda Distributionmentioning

confidence: 99%

Distribution of pelagic Ostracoda (Crustacea) inhabiting the waters around Svalbard (Arctic Ocean: 76°36–81°50N)

2011

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Although, pelagic Ostracoda are locally abundant component of the mesozooplankton in the waters around Svalbard, the group remains poorly characterised both taxonomically and ecologically. Herein, the spatial and vertical variations in abundances and species composition of the pelagic Ostracoda assemblages are examined and related to the water masses. The study is based on a series of zooplankton samples collected with a multinet plankton sampler (MPS; HydroBios, Kiel), consisting of five nets fitted with a 180-lm mesh net. Samples were collected from deep stations (i.e., with bottom depths [300 m) around Svalbard and included localities influenced by the West Spitsbergen Current and the East Spitsbergen Current and to the north of Svalbard, between years 2001 and 2006. Throughout all the samples studied Discoconchoecia elegans was the numerically dominant species. The other species found were Boroecia maxima, Boroecia borealis, Obtusoecia obtusata, and a rare novel Boroecia species. Analyses of the pelagic Ostracoda assemblages showed that their variability was predominantly influenced by four factors: water temperature, geographical position, bottom depth and season. The highest densities of D. elegans were correlated with salinities [35 PSU whereas B. maxima distribution was dependent on latitude. Highest concentrations of B. borealis were determined by longitude. Abundances of O. obtusata were positively correlated with warmer water temperatures. Thus this work suggests that halocyprids have the potential to be good indicators of environmental changes associated with shifts in climate at high latitudes in the North Atlantic.

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A year round comparative study on the population structures of pelagic Ostracoda in Admiralty Bay (Southern Ocean)

Błachowiak‐Samołyk¹,

Angel²

2007

Ostracodology — Linking Bio- And Geosciences

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Planktonic ostracods along the Antarctic Peninsula during the 1989/90 summer season

Cited by 5 publications

References 18 publications

A year round comparative study on the population structures of pelagic Ostracoda in Admiralty Bay (Southern Ocean)

A year round comparative study on the population structures of pelagic Ostracoda in Admiralty Bay (Southern Ocean)

Distribution of pelagic Ostracoda (Crustacea) inhabiting the waters around Svalbard (Arctic Ocean: 76°36–81°50N)

A year round comparative study on the population structures of pelagic Ostracoda in Admiralty Bay (Southern Ocean)

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