Distribution and reproduction of the Arctic ctenophore Mertensia ovum in the Baltic Sea

Lehtiniemi, Maiju; Gorokhova, Elena; Bolte, Sören; Haslob, Holger; Huwer, Bastian; Katajisto, Tarja; Lennuk, Lennart; Majaneva, Sanna; Põllumäe, Arno; Schaber, Matthias; Setälä, Outi; Reusch, Thorsten B. H.; Viitasalo-Frösen, Satu; Vuorinen, Ilppo; Välipakka, Pentti

doi:10.3354/meps10464

Cited by 7 publications

(15 citation statements)

References 41 publications

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“…Of fish the herring is likely still to be present, although smaller in size; sprat or cod, instead, will not be part of the projected alternative food web. Together with a decline of marine copepods in the northern Baltic proper, a decrease is expected of the comb jelly Mertensia ovum (limited by salinity of 5.5, Lehtiniemi et al, 2013 ), and the moon jellyfish Aurelia aurita (limiting salinity is around 5, Furman et al, 2001 ).…”

Section: Discussion – Possible Consequences Of the Projected Salinitymentioning

confidence: 99%

“…Such changes include a decrease in the numbers of large marine Copepoda, especially Pseudocalanus sp. ( Ojaveer et al, 1998 Vuorinen et al, 1998 ) and a marine Ctenophore species Mertensia ovum ( Lehtiniemi et al, 2013 ) as well as in the distribution area of several benthic species ( BACC, 2008 ). Since these are marine species, low salinity imposes increasing osmoregulation costs.…”

Section: Review Of Changes In Hydrography and Their Ecological Conseqmentioning

confidence: 99%

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Scenario simulations of future salinity and ecological consequences in the Baltic Sea and adjacent North Sea areas–implications for environmental monitoring

Vuorinen

Hänninen

Rajasilta

et al. 2015

Ecological Indicators

129

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HighlightsWe modelled the surface water salinity in the Baltic from the 1960s to 2100.We studied possible changes in distribution areas of predominant plant, invertebrate and fish species.The results suggest a critical shift in the salinity range 5–7, which is a bottleneck for both marine and freshwater species distribution and diversity.This foreseen salinity change is likely to have large impacts on marine ecology, it́s monitoring, modelling as well as fisheries.

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Section: Discussion – Possible Consequences Of the Projected Salinitymentioning

confidence: 99%

Section: Review Of Changes In Hydrography and Their Ecological Conseqmentioning

confidence: 99%

Scenario simulations of future salinity and ecological consequences in the Baltic Sea and adjacent North Sea areas–implications for environmental monitoring

Vuorinen

Hänninen

Rajasilta

et al. 2015

Ecological Indicators

129

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“…Descent to deeper waters in autumn, and ascent to shallower waters between spring and summer has been reported for A. digitale, M. ovum, and B. cucumis from ~59°N in the Northeast Atlantic (Williams & Conway 1981), ~62.5°N in Frobisher Bay (Percy 1989), ~67°N in White Sea (Pertsova et al 2006), and ~74°N in Resolute Passage (Siferd & Conover 1992). In addition, shallow spring−summer vertical distributions of M. ovum and B. cucumis have been reported from ~55.5°N in the Bornholm basin of the Baltic Sea (Lehtiniemi et al 2013), between 68 and 80°N in the Barents Sea and Fram Strait, (Swanberg & Båmstedt 1991a), and between 72 and 75°N in the western Arctic Ocean (Purcell et al 2010).…”

Section: Carnivoresmentioning

confidence: 99%

Seasonal vertical strategies in a high-Arctic coastal zooplankton community

Bandara¹,

Varpe²,

Søreide³

et al. 2016

Mar. Ecol. Prog. Ser.

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We studied the larger (>1000 µm) size fraction of zooplankton in an Arctic coastal water community in Billefjorden, Svalbard (78°40' N), Norway, in order to describe seasonal vertical distributions of the dominant taxa in relation to environmental variability. Calanus spp. numerically dominated the herbivores; Aglantha digitale, Mertensia ovum, Beroë cucumis, and Parasagitta elegans were the dominant carnivores. Omnivores and detritivores were numerically less important. Descent to deeper regions of the water column (>100 m) between August and October, and ascent to the shallower region (<100 m) between November and May was the overall seasonal pattern in this zooplankton community. In contrast to other groups, P. elegans did not exhibit pronounced vertical migrations. Seasonal vertical distributions of most species showed statistical associations with the availability of their main food source. The vertical distribution of later developmental stages of Calanus spp. was inversely associated with fluorescence, indicating that they descended from the shallower region while it was still relatively productive, and ascended before the primary production had started to increase. Strong associations between the vertical distributions of secondary consumer M. ovum and Calanus spp., and tertiary consumer B. cucumis and M. ovum indicated that these carnivores seasonally followed their prey through the water column. We conclude that seasonal vertical migrations are a widespread trait in the high Arctic community studied, and predator−prey interactions seem particularly central in shaping the associations between the seasonal vertical strategies of adjacent trophic levels.

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“…Mnemiopsis leidyi is one of the two ctenophore species present in the Baltic Sea [11,13], though its native distribution range belongs to the east coast of the Americas [95]. Its first record in the Baltic Sea dates back to September 2006 along the Mecklenburg coast of Germany, namely Nienhagen, Stolteraa, Hiddensee Island [14].…”

Section: Distribution In the Balticmentioning

confidence: 99%

“…This cyddipid ctenophore has long been misidentified as Pleurobrachia pileus (Müller, 1776), especially in the central and northern Baltic Sea [10]. However, recent molecular identification tools have documented that M. ovum is common and occurs throughout the Baltic Sea [11][12][13]. The second ctenophore species is Mnemiopsis leidyi (A. Agassiz, 1865), which is non-indigenous to the Baltic Sea and was first observed in September 2006 along the eastern German coast [14].…”

Section: Introduction 1the Baltic Sea and Its General Gelatinous Macro-zooplankton Communitymentioning

confidence: 99%

Diversity and Physiological Tolerance of Native and Invasive Jellyfish/Ctenophores along the Extreme Salinity Gradient of the Baltic Sea

Jaspers

Bezio²,

Hinrichsen

2021

Diversity

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Global change has led to manifold changes of marine ecosystems and biodiversity world-wide. While it has been shown that certain jellyfish and comb jelly species have increased regionally, it remains to be investigated if this is a general trend or localized phenomenon. Especially for the economically important Baltic Sea, which is characterized by an extreme physical environmental gradient, this question has not been addressed to date. Here we present a detailed account of the gelatinous macro-zooplankton community including their physiological tolerance towards abiotic conditions and resulting distribution ranges in the Baltic. We show that the arrival and establishment of non-indigenous species has led to a rising importance of jellyfish and comb jellies in the Baltic. This accounts for the comb jelly Mnemiopsis leidyi, which was first observed in Northern Europe in 2005, as well as for the hydromedusae Blackfordia virginica, first sighted in 2014. Both species have been shown to attain high population densities with pronounced grazing impact in other invasive regions. Given the current and anticipated changes of the physical environment of the Baltic Sea, especially ongoing warming, amplification of their impact can be expected.

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Distribution and reproduction of the Arctic ctenophore Mertensia ovum in the Baltic Sea

Cited by 7 publications

References 41 publications

Scenario simulations of future salinity and ecological consequences in the Baltic Sea and adjacent North Sea areas–implications for environmental monitoring

Scenario simulations of future salinity and ecological consequences in the Baltic Sea and adjacent North Sea areas–implications for environmental monitoring

Seasonal vertical strategies in a high-Arctic coastal zooplankton community

Diversity and Physiological Tolerance of Native and Invasive Jellyfish/Ctenophores along the Extreme Salinity Gradient of the Baltic Sea

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