Pelagic larvae of benthic gastropods from shallow Antarctic waters of Admiralty Bay, King George Island

Absher, Theresinha Monteiro; Boehs, Guisla; Feijó, Angela R.; Cruz, Andrea C. da

doi:10.1007/s00300-003-0479-y

Cited by 19 publications

(10 citation statements)

References 13 publications

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“…Such extreme abundances were also described for gastropod veligers in some of the samples from the Bellingshausen Sea (6495 larvae per 100 m 3 in Ameneiro et al (2012)). High veliger abundances described in previous Antarctic coastal sampling (Absher et al 2003, Freire et al 2006 were suggested to belong to benthic taxa as Nacella concinna (Strebel) or Neobuccinum eatoni (Smith), highly abundant in the area. The presence of Limacina helicina amongst these veligers cannot be dismissed, as Admiralty Bay has a great influx from oceanic waters (Pruszak 1980) and other holoplanktonic species (Pelagobia longicirrata) were very abundant in the bay (Freire et al 2006).…”

Section: Discussionmentioning

confidence: 73%

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The meroplankton community of the oceanic Ross Sea during late summer

2013

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Meroplankton community studies in the Antarctic have primarily focused on the coastal waters of both the Antarctic Peninsula and the Ross Sea. The New Zealand International Polar Year -Census of Antarctic Marine Life (IPY-CAML) voyage to the Ross Sea during the late summer (February-March) 2008 provided the first meroplankton samples from three regions in the deep, oceanic waters of the Ross Sea (shelf, slope and adjacent offshore Antarctic waters of Admiralty Seamount and Scott Island). We used a combined morphological and molecular approach to identify 36 larval operational taxonomic units based on sequences from three loci (16S, 18S, COI), and exclude early developmental stages of holoplankton. Overall, larval abundance was lower than previous Antarctic studies (5.19 specimens per 100 m 3 ), with larvae most abundant in the first 200 m of the water column and most diverse in the shelf region. Multivariate analysis revealed significant differences in the meroplankton community between regions and depth ranges, but with low similarity within these groupings; differences between water masses were undetectable due to the confounding effect with both region and depth. The influence of nearby benthic populations (e.g. the acorn barnacle Bathylasma corolliforme) and/or locally abundant taxa (e.g. the nudibranch Tergipes antarcticus) was evident in the meroplankton community.

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Section: Discussionmentioning

confidence: 73%

“…Further, there is now considerable evidence that larvae are abundant in Antarctic coastal environments, both on the Antarctic Peninsula and in the Ross Sea (Stanwell-Smith et al 1999, Absher et al 2003, Freire et al 2006, Sewell 2006, Thornhill et al 2008, Bowden et al 2009, Sewell & Jury 2009, 2011.…”

Section: Introductionmentioning

confidence: 99%

The meroplankton community of the oceanic Ross Sea during late summer

2013

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“…The GI cluster included stations predominated by echinospira veligers and polychaete larvae. The abundance and distribution of gastropod veligers may be related to a peak in primary production at the end of the January and February (Absher et al 2003;Freire et al 2006). In other Antarctic areas, polychaete larvae also coincide with the summer bloom [in Ross Sea, Pane et al (2004), in Admiralty Bay, Freire et al (2006); in Rothera Bay, Bowden et al (2009)].…”

Section: Discussionmentioning

confidence: 99%

“…Although most benthic invertebrates display indirect development, with pelagic larval stages at temperate latitudes, the lack of larvae in polar waters led to believe that Antarctic benthic invertebrates reproduce without a planktonic stage (Murray 1895;Thorson 1950). However, recent studies in the Southern Ocean have revealed a relatively high diversity and abundance of larval forms (Shreeve and Peck 1995;Stanwell-Smith et al 1999;Arntz and Gili 2001;Absher et al 2003;Sewell 2005;Freire et al 2006;Vázquez et al 2007;Bowden et al 2009), some of which are planktotrophic. Moreover, some of the most abundant species in these cold-water habitats reproduce seasonally, usually in late winter and early spring, so that the planktotrophic larvae coincide with the summer phytoplankton bloom (Pearse et al 1991;Stanwell-Smith et al1999;Pearse and Bosch 2002;Pearse and Lockhart 2004;Bowden et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Abundance and distribution of invertebrate larvae in the Bellingshausen Sea (West Antarctica)

et al. 2012

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The central part of the Bellingshausen Sea has been poorly studied, partly because of the presence of ice during most of the year. The main aim of this study was to analyse the abundance and distribution of meroplankton, and the influence of oceanographic properties were investigated in the Bellingshausen Sea (West Antarctica) during the BENTART-06 cruise carried out in January-February 2006. Zooplankton samples were collected with a 80-μm mesh plankton net hauled vertically from a depth of 200 m to the surface at fifteen stations across the Bellingshausen Sea. Fifteen types of larval benthic invertebrates were found, with echinospira and nudibranch veligers being the most abundant. Hierarchical analysis and non-metric multidimensional scaling revealed a high degree of spatial variability in both larval abundance and larval types across the Bellingshausen Sea. The variability was significantly correlated with total chlorophyll-a and the contribution of large (>5 μm) phytoplankton to total chlorophyll, indicating the availability of food as an important factor determining the larval distribution observed. Nudibranch veligers, nemertean pilidia, echinoderm and planula larvae were more abundant at stations in the central Bellingshausen Sea, which was characterized by low phytoplankton biomass and production. Higher abundances of echinospira veligers and polychaete larvae were found at the more productive stations close to Peter I Island and the Antarctic Peninsula. The abundance and diversity of larval types found in the Bellingshausen Sea during the BENTART-06 cruise support the hypothesis that indirect development through larval swimming stages plays a key role in benthic recruitment in polar areas.

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“…A circulação é caracterizada pela entrada de um grande volume de água do Estreito de Bransfield na região central através da grande abertura localizada ao sul da Baía. A entrada de águas menos salinas se dá através do escoamento de águas originadas do degelo continental, gerando uma contracorrente de grande velocidade que separa os corpos de água da zona costeira e da zona central (ABSHER et al, 2003).…”

Section: Baía Do Almirantadounclassified

Estudo da diversidade molecular de bactérias e arquéias e enriquecimento de comunidades metanogênicas em sedimentos marinhos antárticos.

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Pelagic larvae of benthic gastropods from shallow Antarctic waters of Admiralty Bay, King George Island

Cited by 19 publications

References 13 publications

The meroplankton community of the oceanic Ross Sea during late summer

The meroplankton community of the oceanic Ross Sea during late summer

Abundance and distribution of invertebrate larvae in the Bellingshausen Sea (West Antarctica)

Estudo da diversidade molecular de bactérias e arquéias e enriquecimento de comunidades metanogênicas em sedimentos marinhos antárticos.

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