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Article
Climate change impacts on Antarctic krill behaviour and population dynamics
Krill habitats in the Southern Ocean are impacted by changing climate conditions, reduced sea ice and rising temperatures. These changes, in turn, affect krill occurrence, physiology and behaviour, which could...
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Article
Open AccessThe impact of salps (Salpa thompsoni) on the Antarctic krill population (Euphausia superba): an individual-based modelling study
Krill (Euphausia superba) and salps (Salpa thompsoni) are key macrozooplankton grazers in the Southern Ocean ecosystem. However, due to differing habitat requirements, both species previously exhibited little spa...
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Article
Open AccessReturn of large fin whale feeding aggregations to historical whaling grounds in the Southern Ocean
Fin whales (Balaenoptera physalus quoyi) of the Southern Hemisphere were brought to near extinction by twentieth century industrial whaling. For decades, they had all but disappeared from previously highly freque...
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Article
Open AccessA thorough annotation of the krill transcriptome offers new insights for the study of physiological processes
The krill species Euphausia superba plays a critical role in the food chain of the Antarctic ecosystem. Significant changes in climate conditions observed in the Antarctic Peninsula region in the last decades hav...
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Article
Open AccessKrill and salp faecal pellets contribute equally to the carbon flux at the Antarctic Peninsula
Krill and salps are important for carbon flux in the Southern Ocean, but the extent of their contribution and the consequences of shifts in dominance from krill to salps remain unclear. We present a direct com...
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Article
Open AccessSelective feeding in Southern Ocean key grazers—diet composition of krill and salps
Over the past decades, two key grazers in the Southern Ocean (SO), krill and salps, have experienced drastic changes in their distribution and abundance, leading to increasing overlap of their habitats. Both s...
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Article
Open AccessSpatial distribution of microzooplankton in different areas of the northern Antarctic Peninsula region, with an emphasis on tintinnids
The Western Antarctic Peninsula (WAP) is experiencing rapid climate warming, resulting in affecting the marine food web. To investigate the microzooplankton spatial distribution and to assess how climate chang...
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Article
Timing requires the right amount and type of light
The quantity of UVA/deep violet light varies seasonally and affects locomotor activity in a marine annelid, providing cues for phenology in addition to those provided by change in photoperiod.
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Article
Open AccessDaily transcriptomes of the copepod Calanus finmarchicus during the summer solstice at high Arctic latitudes
The zooplankter Calanus finmarchicus is a member of the so-called “Calanus Complex”, a group of copepods that constitutes a key element of the Arctic polar marine ecosystem, providing a crucial link between prima...
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Article
Open AccessSuccessful ecosystem-based management of Antarctic krill should address uncertainties in krill recruitment, behaviour and ecological adaptation
Antarctic krill, Euphausia superba, supports a valuable commercial fishery in the Southwest Atlantic, which holds the highest krill densities and is warming rapidly. The krill catch is increasing, is concentrated...
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Article
Open AccessCircadian regulation of diel vertical migration (DVM) and metabolism in Antarctic krill Euphausia superba
Antarctic krill (Euphausia superba) are high latitude pelagic organisms which play a key ecological role in the ecosystem of the Southern Ocean. To synchronize their daily and seasonal life-traits with their high...
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Article
Open AccessDiurnal self-aggregation
Convective self-aggregation is a modelling paradigm for convective rain cell organisation over a constant-temperature tropical sea surface. This set-up can give rise to cloud clusters develo** over timescale...
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Chapter
Biological Clocks and Rhythms in Polar Organisms
Biological clocks are universal to all living organisms on Earth. Their ubiquity is testament to their importance to life: from cells to organs and from the simplest cyanobacteria to plants and primates, they ...
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Article
Open AccessAnalysis of the circadian transcriptome of the Antarctic krill Euphausia superba
Antarctic krill (Euphausia superba) is a high latitude pelagic organism which plays a central role in the Southern Ocean ecosystem. E. superba shows daily and seasonal rhythms in physiology and behaviour, which a...
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Chapter
Climate Change: Warming Impacts on Marine Biodiversity
In this chapter, the effects of temperature change—as a main aspect of climate change—on marine biodiversity are assessed. Starting from a general discussion of species responses to temperature, the chapter pr...
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Article
Open AccessFunctional characterization of the circadian clock in the Antarctic krill, Euphausia superba
Antarctic krill (Euphausia superba) is a key species in Southern Ocean ecosystem where it plays a central role in the Antarctic food web. Available information supports the existence of an endogenous timing syste...
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Article
The winter pack-ice zone provides a sheltered but food-poor habitat for larval Antarctic krill
A dominant Antarctic ecological paradigm suggests that winter sea ice is generally the main feeding ground for krill larvae. Observations from our winter cruise to the southwest Atlantic sector of the Southern...
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Article
Competition-induced starvation drives large-scale population cycles in Antarctic krill
Antarctic krill (Euphausia superba)—one of the most abundant animal species on Earth—exhibits a five to six year population cycle, with oscillations in biomass exceeding one order of magnitude. Previous studies h...
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Article
Open AccessGlacial melting: an overlooked threat to Antarctic krill
Strandings of marine animals are relatively common in marine systems. However, the underlying mechanisms are poorly understood. We observed mass strandings of krill in Antarctica that appeared to be linked to ...
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Chapter
Physiology of Euphausia superba
Since the 1920s, E. superba is one of the best studied species in the Southern Ocean in terms of their general biology. The main driver for this research focus has been the fisheries’ requirements for stock forec...
