Year-round meroplankton dynamics in high-Arctic Svalbard

Stübner, Eike Ingrid; Søreide, Janne E.; Reigstad, Marit; Marquardt, Miriam; Błachowiak‐Samołyk, Katarzyna

doi:10.1093/plankt/fbv124

Cited by 67 publications

(80 citation statements)

References 41 publications

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“…The strong association of bivalve larval abundance in Adventfjorden with the phytoplankton biomass, estimated through chlorophyll a concentrations, suggests that peaks in larval abundance are linked to shifts in food availability (Spearman's rank correlation, q 19 = 0.76, p \ 0.01). This has also been demonstrated earlier for both bivalve larvae (Günther and Fedyakov 2000) and other groups (Stübner et al 2016), in polar regions. In Adventfjorden, both phytoplankton and bivalve larval peaks were a month later in 2007 (Kuklinski et al 2013) than in 2012 (this study).…”

Section: Seasonality Of Arctic Bivalve Larvaesupporting

confidence: 86%

“…In Adventfjorden, the peak occurrence of bivalve larvae (July 2012) followed shortly after the phytoplankton bloom (May 2012). This suggests that food availability may be the main trigger for spawning (Starr et al 1990) and a planktotrophic mode for bivalve larvae has been suggested in Adventfjorden (Stübner et al 2016). Even though changes in water temperature are also known to coincide with the reproduction of marine bivalves (Chícharo and Chícharo 2000;Goeij and Honkoop 2003;Costa et al 2012), this was not found in our study (Spearman's rank correlation, q 19 = 0.01, p [ 0.1).…”

Section: Seasonality Of Arctic Bivalve Larvaecontrasting

confidence: 60%

“…Samples were obtained at the IsA (Isfjorden, Adventfjorden) time series station, between December 2011 and January 2013 as described by Stübner et al (2016). Zooplankton samples were acquired once a fortnight, using a Working Party II (WPII) net of 63 lm mesh size (Tranter 1968).…”

Section: Sampling Sitementioning

confidence: 99%

“…Salinity and temperature data were collected at the sampling station before the WPII hauls using a conductivity/temperature/ depth (CTD) profiler (SAIVSD204). Chlorophyll a samples were obtained using a 10-L Niskin bottle lowered to depths of 5, 15, 25 and 60 m during each sampling and processed according to methods in Stübner et al (2016).…”

Section: Sampling Sitementioning

confidence: 99%

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Seasonality of bivalve larvae within a high Arctic fjord

et al. 2016

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The temporal and spatial distribution of larval plankton of high latitudes is poorly understood. The objective of this work is to identify the occurrence and abundance of pelagic bivalve larvae within a high Arctic fjord (Adventfjorden, Svalbard) and to reveal their seasonal dynamics in relation to environmental variables-temperature, salinity and chlorophyll a-between December 2011 and January 2013. We applied a combination of DNA barcoding of mitochondrial 16S ribosomal RNA and morphological analysis to identify the bivalve larvae found within the plankton and demonstrate a strong seasonality in the occurrence of bivalve larvae, largely coinciding with periods of primary productivity. Seasonal occurrences of bivalve larval species differ from those known for other populations across species' biogeographic distribution ranges. Serripes groenlandicus, which is of circum-Arctic distribution, demonstrated a later occurrence than Mya truncata or Hiatella arctica, which are of predominantly boreal or cosmopolitan distribution, respectively. S. groenlandicus larvae demonstrate the most pronounced response to seasonality, with the shortest presence in the water column. Establishing latitudinal differences in the occurrence of bivalve larvae enhances our understanding of how reproductive traits of marine invertebrates may respond to climate-driven seasonal shifts in the occurrence of primary productivity.

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Section: Seasonality Of Arctic Bivalve Larvaesupporting

confidence: 86%

Section: Seasonality Of Arctic Bivalve Larvaecontrasting

confidence: 60%

Section: Sampling Sitementioning

confidence: 99%

Section: Sampling Sitementioning

confidence: 99%

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Seasonality of bivalve larvae within a high Arctic fjord

et al. 2016

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“…Their analysis showed a predominance of pelagic development outside this group. Furthermore, recent studies of Arctic meroplankton have shown that planktonic larval stages of benthic organisms comprise a considerable fraction of the total zooplankton community (Clough et al 1997), and may dominate during productive seasons in terms of abundance and biomass (Stübner et al 2016). Furthermore, meroplankton diversity observed in Arctic and sub-Arctic regions points to the importance of a bentho−pelagic life cycle in these regions (Andersen 1984, Schlüter & Rachor 2001 that can provide insight into adult distributions and potential range extensions for benthic species in the context of climate change (e.g.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal structure of the meroplankton community in a sub-Arctic shelf system

Silberberger¹,

Renaud²,

Espinasse³

et al. 2016

Mar. Ecol. Prog. Ser.

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The early development of many benthic invertebrates involves planktonic larval stages enabling larvae to disperse over large distances and to utilize food from the productive upper water layers. Although many past studies have recognized the importance of this period in the benthic life cycle, knowledge of larval distribution in time and space remains limited, especially for high-latitude regions with pronounced seasonal variability in environmental conditions. Here, we present the first inventory of meroplankton over the continental shelf in the Lofoten− Vesterålen region, northern Norway, over a full annual cycle. Six stations were sampled during 8 sampling events between September 2013 and August 2014. We recorded a total of 65 taxa, a considerably higher diversity than reported in studies from more northern regions. We observed a distinct seasonal pattern with characteristic meroplankton communities defining the seasons: spring, summer, and winter. Abundance and diversity during winter was low, with higher values in spring, and maximum abundances for most taxa in summer. Meroplankton community patterns did not reflect weak environmental spatial structure. Particle tracking was used to identify source and settlement locations of spring and summer communities. Spring and summer communities originated from shore and shelf areas, respectively. Larvae were generally transported toward Andfjord and adjacent shelf regions, irrespective of season. This spatially restricted dispersal and larval settlement highlights the importance of the local benthic communities for the resilience of the ecosystem.

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