Pelagic coelenterates in the Atlantic sector of the Arctic Ocean − species diversity and distribution as water mass indicators

Mańko, Maciej K.; Panasiuk, Anna; Żmijewska, Maria Iwona

doi:10.1515/ohs-2015-0044

Cited by 13 publications

(4 citation statements)

References 48 publications

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“…According to Troedsson et al [34], a lower pH would favor appendicularian fitness, and lead to an increase in their ecological importance. However, the increased ecological importance of these animals, along with progressive climate changes, would be in line with the general trend of the increasing importance of jellyfish organisms (e.g., tunicates and cnidarians) in all marine environments [32], including polar regions [65][66][67][68][69].…”

Section: Environmental Factors Influencing the Zonal Distribution Of Appendicullariamentioning

confidence: 60%

Spatial Distribution Patterns of Appendicularians in the Drake Passage: Potential Indicators of Water Masses?

Kalarus

Panasiuk

2021

Diversity

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Appendicularians are one of the most common animals found within zooplankton assemblages. They play a very important role as filter feeders but are, unfortunately, inconsistently reported in the Antarctic literature. The present paper attempts to describe the zonal diversity of appendicularians and the main environmental factors influencing their communities in the Drake Passage. Samples were collected during Antarctic summer in 2009–2010. A total of eight species of larvaceans were identified. Fritillaria borealis was the species found in the highest numbers in almost the entire studied area, and was observed at all sampling stations. The distributions of other taxa were limited to specific hydrological zones and hydrological conditions. F. fraudax and Oikopleura gaussica were typical of the areas between the Polar Front and the Subantarctic Front zones, and their distributions were significantly correlated with temperature and salinity, likely making them good indicator species. The F. fusiformis distribution was strictly related to South American waters. In summary, temperature was the strongest environmental factor influencing the larvacean community structure in the Drake Passage, and we also found that testing environmental factors on larvaceans as a whole group did not give entirely reliable results.

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Section: Environmental Factors Influencing the Zonal Distribution Of Appendicullariamentioning

confidence: 60%

Spatial Distribution Patterns of Appendicularians in the Drake Passage: Potential Indicators of Water Masses?

Kalarus

Panasiuk

2021

Diversity

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“…Relatively little has been published on species distributions or abundances of gelatinous zooplankton in Northern Norway and the wider Arctic (but see Falkenhaug, 1996;Brodeur et al, 1999Brodeur et al, , 2008Raskoff et al, 2005;Purcell et al, 2010;Manko et al, 2015;Ronowicz et al, 2015). Nevertheless, gelatinous predators can at times exert considerable predation pressure on other zooplankton in the Arctic (Swanberg and Båmstedt, 1991;Purcell et al, 2010;Majaneva et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Coincident Mass Occurrence of Gelatinous Zooplankton in Northern Norway

et al. 2018

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In autumn 2015, several sources reported observations of large amounts of gelatinous material in a large north Norwegian fjord system, either caught when trawling for other organisms or fouling fishing gear. The responsible organism was identified as a physonect siphonophore, Nanomia cara, while a ctenophore, Beroe cucumis, and a hydromedusa, Modeeria rotunda, were also registered in high abundances on a couple of occasions. To document the phenomena, we have compiled a variety of data from concurrent fisheries surveys and local fishermen, including physical samples, trawl catch, and acoustic data, photo and video evidence, and environmental data. Because of the gas-filled pneumatophore, characteristic for these types of siphonophores, acoustics provided detailed and unique insight to the horizontal and vertical distribution and potential abundances (∼0.2-20 colonies•m −3) of N. cara with the highest concentrations observed in the near bottom region at ∼320 m depth in the study area. This suggests that these animals were retained and accumulated in the deep basins of the fjord system possibly blooming here because of favorable environmental conditions and potentially higher prey availability compared to the shallower shelf areas to the north. Few cues as to the origin and onset of the bloom were found, but it may have originated from locally resident siphonophores. The characteristics of the deep-water masses in the fjord basins were different compared to the deep water outside the fjord system, suggesting no recent deep-water import to the fjords. However, water-masses containing siphonophores (not necessarily very abundant), may have been additionally introduced to the fjords at intermediate depths, with the animals subsequently trapped in the deeper fjord basins. The simultaneous observations of abundant siphonophores, hydromedusae, and ctenophores in the Lyngen-Kvaenangen fjord system are intriguing, but difficult to provide a unified explanation for, as the organisms differ in their biology and ecology. Nanomia and Beroe spp. are holopelagic, while M. rotunda has a benthic hydroid stage. The species also have different trophic ecologies and dietary preferences. Only by combining information from acoustics, trawling, genetics, and local fishermen, were the identity, abundance, and the vertical and horizontal distribution of the physonect siphonophore, N. cara, established.

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“…Gelatinous zooplankton, which includes appendicularians, may play an important role in the functioning of pelagic food webs and biogeochemical cycles due to their important role in the circulation of organic matter [8,16,[29][30][31][32]. Increased melting of glaciers has been observed in Antarctic shelf regions in recent decades [28,[33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Appendicularia (Tunicata) in an Antarctic Glacial Fjord–Chaotic Fjordic Structure Community or Good Indicators of Oceanic Water Masses?

Panasiuk

Kalarus

2021

Diversity

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Appendicularians are important but remain poorly studied groups of zooplankton in polar regions. The present research is based on samples collected in Admiralty Bay (King George Island) during a year-long period. Six larvacean species were noted, among which Fritillaria borealis and Oikopleura gaussica were found to be the most numerous, while the other species were relatively rare. Fritillaria borealis was a dominant part of the late summer (warm water) community, while O. gaussica had the highest presence in the winter (cold water) community. The abundance of appendicularians recorded in the bay was less numerous than that described by other authors. The most important factors influencing annual changes in the larvaceans in the bay was season, but only in the case of the two species. These facts were probably linked to the very dynamic changes in the abiotic conditions in the fjord, and the influx of specific masses of water.

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Pelagic coelenterates in the Atlantic sector of the Arctic Ocean − species diversity and distribution as water mass indicators

Cited by 13 publications

References 48 publications

Spatial Distribution Patterns of Appendicularians in the Drake Passage: Potential Indicators of Water Masses?

Spatial Distribution Patterns of Appendicularians in the Drake Passage: Potential Indicators of Water Masses?

Coincident Mass Occurrence of Gelatinous Zooplankton in Northern Norway

Appendicularia (Tunicata) in an Antarctic Glacial Fjord–Chaotic Fjordic Structure Community or Good Indicators of Oceanic Water Masses?

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