Macrofaunal shallow benthic communities along a discontinuous annual cycle at Admiralty Bay, King George Island, Antarctica

Echeverría, Carlos Alejandro; Paiva, Paulo Cesar

doi:10.1007/s00300-005-0049-6

Cited by 18 publications

(16 citation statements)

References 16 publications

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“…These observations in the deeper (90-300 m) basins of the fjord agree with the previous report of Kędra et al (2012) who compared Kędra et al (2012) found no significant difference in abundance or biomass, and only slightly lower species richness in the winter season that they attributed to increased disturbance in shallow water produced by ice and storms. Similarly, Echeverria and Paiva (2006) found little variability in macrobenthic community attributes, despite the marked seasonal cycles in pelagic productivity in Antarctic coastal water (Admiralty Bay). For meiofauna, little response in the abundance was recorded after the sedimentation of the spring phytoplankton at the Alaskan shelf by Fleeger et al (1989) or in a North Water Polynyas by Ambrose and Renaud (1997).…”

Section: Discussion Seasonal Variability In Benthic Communitiesmentioning

confidence: 93%

“…The few Arctic seasonal studies that included analyses of sediment respiration and macrobenthic biomass reported that a rise in sediment oxygen uptake after the seasonal pulse of organic matter to the sea floor was not accompanied by an increase in macrobenthic biomass (Renaud et al 2008;Link et al 2011). Moreover, the results in the few studies on seasonal variability in polar benthos standing stocks and taxonomic composition are equivocal, often reporting no or little seasonal effects (Echeverria and Paiva 2006;Kędra et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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Do benthic meiofaunal and macrofaunal communities respond to seasonality in pelagial processes in an Arctic fjord (Kongsfjorden, Spitsbergen)?

et al. 2016

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This study explores whether the marked seasonality in pelagic productivity and phytodetritus fluxes to the sea bottom in an Arctic fjord is reflected in variability of benthic communities in terms of taxonomic composition and standing stocks. Three stations located along the Kongsfjorden (west Spitsbergen) axis were visited in four seasons (May, August, October and January), and meiofauna and macrofauna was sampled. The elusive seasonal variability in benthic attributes contrasted with the clear seasonal effects in organic matter productivity and vertical fluxes (with diatom bloom-related peak in spring). No consistent differences in meiofaunal and macrofaunal density, diversity or composition among the four seasons were detected by PERMANOVA tests. Possible responses to spring food supply in meiofaunal reproduction timing were demonstrated in variability in individual size of Nematoda (decline in October after the maximum in August), Harpacticoida (decline in May and increase till October) and macrobenthic Crustacea (minimum in May). The spatial patterns shaped by the environmental gradients related to glacial inputs, the faunal impoverishment in inner basin and a shift in dominants along the fjord axis, were clearly designated and stable throughout the year. The resilience of Arctic fjordic benthic community to marked seasonality in pelagic phytodetritus fluxes may be related to organic matter reserves in sediments (large enough to sustain the detritus feeders on a year-round basis), inclusion of macroalgal carbon into the diet and common employment of lecithotrophic larva or direct development by polar benthos.

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Section: Discussion Seasonal Variability In Benthic Communitiesmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Do benthic meiofaunal and macrofaunal communities respond to seasonality in pelagial processes in an Arctic fjord (Kongsfjorden, Spitsbergen)?

et al. 2016

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“…Studies including year round sampling or even just wintersummer comparisons remain scarce (Echeverria and Paiva 2006;Jażdzewski et al 2001) and in the Arctic mainly deal with the pelagic system (Berge et al 2009) or sympagic fauna (Werner and Auel 2005). Also, shallow coastal areas in the Arctic have gained relatively little scientific attention (Beuchel and Gulliksen 2008;Beuchel et al 2006;Laudien et al 2007;Urban-Malinga et al 2009).…”

Section: Introductionmentioning

confidence: 97%

“…Primary production influences shallow benthos mainly through winter resource limitations; however, shallow benthic responses to seasonal variations in polar regions remain largely unknown (Grebmeier and Barry 1991;Echeverria and Paiva 2006). Most of the prior research conducted in polar areas was carried out during the summer (Echeverria and Paiva 2006;Piepenburg 2005).…”

Section: Introductionmentioning

confidence: 99%

Shallow winter and summer macrofauna in a high Arctic fjord (79° N, Spitsbergen)

2011

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Very little is known about benthic organisms surviving strategies in extreme winter conditions in polar areas. Most of the research conducted in Arctic has been carried out during the summer from depths available to research vessels. Our study is the first one conducted in winter within a high Arctic fjord at shallow depths. The main aim was to examine the patterns of diversity and community structure of shallow macrobenthos along the depth and distance-to-glacier gradients during winter in Kongsfjorden. The results are compared against reference sampling conducted during the summer. Samples were taken at four depth transects located along the shore of the fjord from the Kongsbreen glacier to the Ny-Ålesund settlement, in March 2009, when the fjord was frozen, with ice cover of 47 cm thickness and no signs of a phytoplankton bloom. The overall species abundance and biomass at shallow depths reached up to 11,800 ind. m -2 at 15 m and 180 gm -2 with over 120 taxa found in winter and another 26 taxa found in summer. Shallow benthic fauna stayed relatively stable throughout the year with carnivores and opportunistic species increasing in numbers during winter. The need for further studies on overwintering strategies of bottom fauna is stressed.

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“…Embora sejam conhecidas as dificuldades e limitações dos estudos no ambiente marinho antártico, pode-se dizer que a macrofauna bentônica que habita as águas rasas dessa região é relativamente bem conhecida, principalmente aquela do sistema marinho da Baía do Almirantado, Ilha Rei George (Echeverría & Paiva, 2006;Sicinski, et al, 2011). Esse volume de informações está relacionado ao longo tempo de pesquisas desenvolvidas na região , cujos resultados tem revelado que Polychaeta (Annelida), Mollusca e Crustacea são os grupos mais representativos em diversidade e abundância na macrofauna bentônica (Arnaud, 1974;Knox, 1977;Cantone, 1995;Bromberg et al, 2000).…”

Section: Introductionunclassified

Levantamento de Polychaeta (Annelida) na Baía do Almirantado, Ilha Rei George (Antártica)

Garraffoni

Moura

Vasconcelos

et al. 2012

Pap. Avulsos Zool. (São Paulo)

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Macrofaunal shallow benthic communities along a discontinuous annual cycle at Admiralty Bay, King George Island, Antarctica

Cited by 18 publications

References 16 publications

Do benthic meiofaunal and macrofaunal communities respond to seasonality in pelagial processes in an Arctic fjord (Kongsfjorden, Spitsbergen)?

Do benthic meiofaunal and macrofaunal communities respond to seasonality in pelagial processes in an Arctic fjord (Kongsfjorden, Spitsbergen)?

Shallow winter and summer macrofauna in a high Arctic fjord (79° N, Spitsbergen)

Levantamento de Polychaeta (Annelida) na Baía do Almirantado, Ilha Rei George (Antártica)

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