Temporal shift in biomass and production of macrozoobenthos in the macroalgal belt at Hansneset, Kongsfjorden, after 15 years

Paar, Martin; Voronkov, Andrey; Hop, Haakon; Brey, Thomas; Bartsch, Inka; Schwanitz, Max; Wiencke, Christian; Lebreton, Benoît; Asmus, Ragnhild; Asmus, Harald

doi:10.1007/s00300-015-1760-6

Cited by 37 publications

(51 citation statements)

References 56 publications

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“…All tests and transformations were performed in R (R Core Team 2015). When significant differences were detected by the Kruskal-Wallis test, we used the Nemenyi tests for multiple comparisons of rank sums for post hoc analysis (Nemenyi 1963). We chose this test as it compensates for family-wise error with Chi squared approximation.…”

Section: Methodsmentioning

confidence: 99%

Species composition and abundance of the shallow water fish community of Kongsfjorden, Svalbard

Brand

Fischer

2016

Polar Biol

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Projections show that climate change will lead to structural change in Arctic ecosystems. Studies project the extinction of local species and intense species invasion to the Arctic Ocean. A lack of basic biological data about the Arctic shallow water fish community will make it hard to assess whether these communities will change or not. Baseline studies in combination with future reassessments are needed to establish a basic knowledge about the change of these communities. This study provides a quantitative first time description of the shallow water fish community of Kongsfjorden, Svalbard. The fish assemblage in the depth range from 3 to 12 m was determined with respect to abundance and species composition. Among a total sample size of 2804 specimens, the presence of 12 fish species and one family (Liparidae) was detected. Myoxocephalus scorpius (shorthorn sculpin) (74.9 %), Gadus morhua (Atlantic cod) (17.2 %), and Gymnocanthus tricuspis (Arctic staghorn sculpin) (3.8 %) were identified as the most abundant species across all sampling sites. A significant relationship between algal coverage and fish abundance was detected. Furthermore, we demonstrated a fjord inward increase in biodiversity along the south shore that might be correlated with a change in hydrographic regime.

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Section: Methodsmentioning

confidence: 99%

Species composition and abundance of the shallow water fish community of Kongsfjorden, Svalbard

Brand

Fischer

2016

Polar Biol

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“…The high abundance of meroplankton in Kongsfjorden might reflect a large adult biomass that inhabits the benthos in this region (Paar et al 2015). Another important factor influencing the distribution of benthic invertebrate larvae may be their advective transport (Mileikovsky 1968).…”

Section: Discussionmentioning

confidence: 99%

Zooplankton in Svalbard fjords on the Atlantic–Arctic boundary

et al. 2016

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Zooplankton abundance and community structures were studied in three west Spitsbergen fjords at the beginning of the warm phase, which seem to have entered in 2006. Sampling was conducted in summer 2007 at stations distributed along transects in Hornsund, Isfjorden and Kongsfjorden. Variations in zooplankton standing stocks and community structures (assessing taxonomic diversity and zoogeographical affiliations) were analysed in relation to the environmental variables using multivariate techniques. The hydrographic conditions in Hornsund were influenced by the cold Arctic Water, whereas those in Isfjorden and especially in Kongsfjorden were, to a greater extent, under the influence of the warm Atlantic Water. High abundances of both meroplankton and holoplankton organisms were observed in Kongsfjorden, with high contributions of boreal and ubiquitous species (Calanus finmarchicus and Oithona similis, respectively). In Hornsund at the same time, the zooplankton consisted mainly of boreo-Arctic and Arctic species, the abundances of which were comparable along the West Spitsbergen Shelf. Our results indicate that the difference in hydrography had measurable effects on the zooplankton community in the study area. Furthermore, by comparing regions of contrasting oceanographic conditions, we present evidence as to how the zooplankton structure will change in the Arctic ecosystems if the warming trends continue to operate with the same dynamics. The advection of Atlantic waters to the Arctic seas may lead to changes in zooplankton structure, with increased abundance and contributions of boreal and small ubiquitous species. The 'warmer Arctic fjords' scenarios may also induce more rapid development of both holoplankton and meroplankton populations and, consequently, modify the trophic interactions in plankton communities.

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“…The study in 1996/98 covered three seasons (spring, summer, autumn) while in 2012-2014 sampling took place in summer (June-August). Details upon site, sampling and overall biodiversity are given in Hop et al (2012), Fredriksen et al (2014), Paar et al (2015) and Bartsch et al (2016).…”

Section: Kongsfjorden (Svalbard)mentioning

confidence: 99%

Status, trends and drivers of kelp forests in Europe: an expert assessment

Araújo

Assis

Aguillar³

et al. 2016

Biodivers Conserv

116

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A comprehensive expert consultation was conducted in order to assess the status, trends and the most important drivers of change in the abundance and geographical distribution of kelp forests in European waters. This consultation included an on-line questionnaire, results from a workshop and data provided by a selected group of experts working on kelp forest mapping and eco-evolutionary research. Differences in status and trends according to geographical areas, species identity and small-scale variations within the same habitat where shown by assembling and mapping kelp distribution and trend data. Significant data gaps for some geographical regions, like the Mediterranean and the southern Iberian Peninsula, were also identified. The data used for this study confirmed a general trend with decreasing abundance of some native kelp species at their southern distributional range limits and increasing abundance in other parts of their distribution (Saccharina latissima and Saccorhiza polyschides). The expansion of the introduced species Undaria pinnatifida was also registered. Drivers of observed changes in kelp forests distribution and abundance were assessed using experts' opinions. Multiple possible drivers were identified, including global warming, sea urchin grazing, harvesting, pollution and fishing pressure, and their impact varied between geographical areas. Overall, the results highlight major threats for these ecosystems but also opportunities for conservation. Major requirements to ensure adequate protection of coastal kelp ecosystems along European coastlines are discussed, based on the local to regional gaps detected in the study.

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Temporal shift in biomass and production of macrozoobenthos in the macroalgal belt at Hansneset, Kongsfjorden, after 15 years

Cited by 37 publications

References 56 publications

Species composition and abundance of the shallow water fish community of Kongsfjorden, Svalbard

Species composition and abundance of the shallow water fish community of Kongsfjorden, Svalbard

Zooplankton in Svalbard fjords on the Atlantic–Arctic boundary

Status, trends and drivers of kelp forests in Europe: an expert assessment

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