Species diversity of macroalgae in Grønfjorden, Spitsbergen, Svalbard

Malavenda, S. V.

doi:10.33265/polar.v40.3682

Cited by 2 publications

(2 citation statements)

References 21 publications

(18 reference statements)

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“…Mild temperature and ice conditions for this latitude allow relatively rich communities to exist on the littoral, which include several tens of macrofaunal species (Weslawski et al ., 1993; Zimina & Meshcheryakov, 2017). In general, the shallow-water communities of the area also abound with a large number of boreal species (Włodarska et al ., 1996; Laudien et al ., 2007; Malavenda, 2021).…”

Section: Discussionmentioning

confidence: 99%

Escape from troubled shores: finding of a shallow-water boreal gastropod Onoba aculeus on the high Arctic shelf

Nekhaev

Rumyantseva

2023

J. Mar. Biol. Ass.

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The species composition and distribution of marine invertebrates varies greatly in different bathymetric regions. Nevertheless, the process of exchange between faunas of different depths has occurred repeatedly throughout the evolution of marine biodiversity. In high latitudes, this process should occur most actively due to absence of strong temperature stratification. The presence of physiological adaptations that allow northern shallow-water organisms to live at greater depth has been demonstrated in a series of experiments. However, known cases of recent colonization by species confined to a highly productive shallow-water zone in unusually deeper Arctic habitats are almost absent. The present study describes finding of population of the gastropod Onoba aculeus (Gould, 1841) in two samples from the lower continental shelf of the Arctic Ocean. Onoba aculeus is a shallow-water amphiatlantic species widely distributed in the temperate regions. The finding reported here is at the same time, the northernmost, easternmost, and most remote from the coast location. We assume that the detection of molluscs indicates the presence of an abundant isolated population in the region.

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Section: Discussionmentioning

confidence: 99%

Escape from troubled shores: finding of a shallow-water boreal gastropod Onoba aculeus on the high Arctic shelf

Nekhaev

Rumyantseva

2023

J. Mar. Biol. Ass.

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“…Global warming generates a series of changes in Arctic marine biota, also strongly affecting the Svalbard Archipelago [ 1 ]. Marine benthic communities are constantly interacting with changes in environmental factors, especially in the intertidal zone.…”

Section: Introductionmentioning

confidence: 99%

High Ecophysiological Plasticity of Desmarestia aculeata (Phaeophyceae) Present in an Arctic Fjord under Varying Salinity and Irradiance Conditions

Marambio

Diehl

Bischof

2022

Biology

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The seaweed Desmarestia aculeata (Phaeophyceae) is distributed in the temperate zone of the North Atlantic up to the Arctic, where it is exposed to a high Arctic light regime and fluctuating salinity conditions resulting from glacial and terrestrial run-off. Information on how this species is able to thrive under current and future Arctic conditions is scarce. During the Arctic summer of 2019, D. aculeata was collected in Kongsfjorden, Svalbard (78.9° N, 11.9° E) to investigate its physiological and biochemical responses to variations in salinity (salinities: 34, 28 and 18) and daily cycles of irradiance (50–500 μmol photons m−2s−1) at 0 °C over 21 days. The species revealed effective short-term acclimation to both abiotic drivers. Maximal quantum yield of PSII (Fv/Fm) fluctuated with the light cycle at a salinity of 34, while the maximum relative electron transport rate (rETRmax) significantly differed between salinities of 28 and 18. Chlorophyll a and β-Carotene remained at high concentrations in all treatments showing pronounced acclimation during the experiment. High mannitol concentrations were measured throughout the experiment, while phlorotannins were high at low salinity. Hyposalinity and light are interacting drivers of the physiological and biochemical acclimation process for D. aculeata. Our experiment highlights the high ecophysiological plasticity of D. aculeata, suggesting that the species will likely be capable of withstanding future habitat changes in the Arctic.

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Species diversity of macroalgae in Grønfjorden, Spitsbergen, Svalbard

Cited by 2 publications

References 21 publications

Escape from troubled shores: finding of a shallow-water boreal gastropod Onoba aculeus on the high Arctic shelf

Escape from troubled shores: finding of a shallow-water boreal gastropod Onoba aculeus on the high Arctic shelf

High Ecophysiological Plasticity of Desmarestia aculeata (Phaeophyceae) Present in an Arctic Fjord under Varying Salinity and Irradiance Conditions

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