Seasonal fluctuations of vagile benthos in the uppermost sublittoral of a maritime Antarctic fjord

Jażdżewski, Krzysztof; Broyer, Claude De; Pudlarz, Magdalena; Zielinski, Dariusz

doi:10.1007/978-3-642-59419-9_13

Cited by 12 publications

(5 citation statements)

References 12 publications

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“…In the present study, the gastropod Nacella concinna Strebel among other, smaller gastropods like Laevilacunaria antarctica Martens and L. umbilicata Pfeffer was found very frequently and was according to its biomass the most important grazer on macrolagae in the intertidal. Dominant amphipod species in the area are Gondogeneia antarctica Chevreux and Djerboa furcipes Chevreux (Jazdzewski et al , 2001; B. Obermüller, personal communication). During the sampling period, the maximal tidal range was about 2 m at a sea surface temperature between − 1.8 °C (spring) and 2 °C (summer).…”

Section: Methodsmentioning

confidence: 99%

Ultraviolet radiation and consumer effects on a field‐grown intertidal macroalgal assemblage in Antarctica

Zacher

Wulff

Molis

et al. 2007

Global Change Biology

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Ultraviolet radiation (UVR) research on marine macroalgae has hithero focussed on physiological effects at the organism level, while little is known on the impact of UV radiation on macroalgal assemblages and even less on interactive effects with other community drivers, e.g. consumers. Field experiments on macrobenthos are scarce, particularly in the Antarctic region. Therefore, the effects of UVR and consumers (mainly limpets were excluded) on early successional stages of a hard bottom macroalgal community on King George Island, Antarctica, were studied. In a two-factorial design experimental units [(1) ambient radiation, 280-700 nm; (2) ambient minus UVB, 320-700 nm and (3) ambient minus UVR, 400-700 nm vs. consumer-no consumer] were installed between November 2004 and March 2005 (n 5 4 plus controls). Dry mass, species richness, diversity and composition of macroalgal assemblages developing on ceramic tiles were followed. Consumers significantly suppressed green algal recruits and total algal biomass but increased macroalgal richness and diversity. Both UVA and UVB radiation negatively affected macroalgal succession. UVR decreased the density of Monostroma hariotii germlings in the first 10 weeks of the experiment, whereas the density of red algal recruits was significantly depressed by UVR at the end of the study. After 106 days macroalgal diversity was significantly higher in UV depleted than in UVexposed assemblages. Furthermore, species richness was significantly lower in the UV treatments and species composition differed significantly between the UV-depleted and the UV-exposed treatment. Marine macroalgae are very important primary producers in coastal ecosystems, serving as food for herbivores and as habitat for many organisms. Both, UVR and consumers significantly shape macroalgal succession in the Antarctic intertidal. Consumers, particularly limpets can mediate negative effects of ambient UVR on richness and diversity till a certain level. UVB radiation in general and an increase of this short wavelength due to stratospheric ozone depletion in particular may have the potential to affect the zonation, composition and diversity of Antarctic intertidal seaweeds altering trophic interactions in this system.

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Section: Methodsmentioning

confidence: 99%

Ultraviolet radiation and consumer effects on a field‐grown intertidal macroalgal assemblage in Antarctica

Zacher

Wulff

Molis

et al. 2007

Global Change Biology

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“…Due to the fact that it was attracted to bait bearing mouthparts typical for feeding on animal carcasses it is assumed that O. infinita is, at least, a facultative carrion-feeder. Jażdżewski et al (2001) reported this species as an epibenthic dweller being also able to burrow in sediments.…”

Section: Size 40-55 MM (Based On Type Series)mentioning

confidence: 96%

Fishing for scavengers: an integrated study to amphipod (Crustacea: Lysianassoidea) diversity of Potter Cove (South Shetland Islands, Antarctica)

et al. 2017

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Amphipoda from the superfamily Lysianassoidea Dana, 1849 play an important role in Southern Ocean benthic food webs due to their high biomass, abundance and predominantly scavenging mode of feeding. Our knowledge on the lysianassoid fauna, even in well-studied areas of the Western Antarctic Peninsula, is incomplete. Here we report the findings of an integrated study of lysianassoid amphipods of Potter Cove, King George Island/ Isla 25 de Mayo (KGI), combining morphological and molecular species identification (COI barcoding) methods, investigating more than 41,000 specimens from baited traps. For comparison, 2039 specimens from the adjacent Marian Cove were analysed. Ten lysianassoid species were recorded in the deeper outer Potter Cove, whereas the inner cove (<50 m) was dominated by a single species, Cheirimedon femoratus Pfeffer, 1888 (99.44% relative abundance). It is hypothesized that the impoverished lysianassoid fauna inside the meltwater-influenced inner cove represents a 1model for future conditions along the Western Antarctic Peninsula under conditions of increased glacial melting. 2Abyssorchomene charcoti (Chevreux, 1912)

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“…The ice foot develops in winter, covering some areas of the intertidal zone and affecting benthic organisms, while the growlers trample benthic species. As a result, macroalgae can only grow in places where the in uence of the ice foot is low, and colonization by macroalgal associated zoobenthos becomes possible in these areas 24,25 . Previous research on the macroalgae of the Antarctic intertidal zone includes taxonomical descriptions and vertical zonation studies, as well as studies on the structure of the assemblage and interactions with the environment or organisms [25][26][27][28][29] .…”

Section: Introductionmentioning

confidence: 99%

Contoured Vertical Distribution and Spatio-temporal Variation of an Intertidal Macroalgal Assemblage in King George Island, Antarctica

Ko¹,

Lee²,

Kim³

et al. 2021

Preprint

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Short-term variability, spatial variability, and the vertical distribution of an intertidal macroalgal assemblage were examined on the coast of Barton Peninsula, Maxwell Bay, King George Island, Antarctica. Sampling was performed during the three austral summer seasons from November 2016 to January 2019. The sampling interval for short-term variability was 1–2 months. Sampling for spatial variability was performed at two sites 400 m apart. Eighteen algal species were identified, with 75% relative coverage of the predominant red Iridaea cordata and endemic brown Phaeurus antarcticus. Summer abundance can be described as a shift from I. cordata to P. antarcticus, and the change in color is intuitively presented using a contour plot for the first time. Short-term variation in the macroalgal assemblage showed 78.35% similarity between one month and 64.61% similarity between two months. The spatial variation analysis indicated 77.13% similarity between the assemblage at the two sites. If global warming continues, the algal population of this region is expected to expand. P. antarcticus, which is primarily found in the subtidal zone, is predicted to relocate southward or higher in the near future. Long-term monitoring of this research region, which is dominated by the two species, is warranted to determine the impact of global warming on the macroalgal assemblage.

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Seasonal fluctuations of vagile benthos in the uppermost sublittoral of a maritime Antarctic fjord

Cited by 12 publications

References 12 publications

Ultraviolet radiation and consumer effects on a field‐grown intertidal macroalgal assemblage in Antarctica

Ultraviolet radiation and consumer effects on a field‐grown intertidal macroalgal assemblage in Antarctica

Fishing for scavengers: an integrated study to amphipod (Crustacea: Lysianassoidea) diversity of Potter Cove (South Shetland Islands, Antarctica)

Contoured Vertical Distribution and Spatio-temporal Variation of an Intertidal Macroalgal Assemblage in King George Island, Antarctica

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