<i>Diacyclops</i> (Copepoda: Cyclopoida) in Continental Antarctica, including three new species

Karanovic, Tomislav; Gibson, John A.E.; Hawes, Ian; Andersen, Dale T.; Stevens, Mark I.

doi:10.1017/s0954102013000643

Cited by 12 publications

(15 citation statements)

References 35 publications

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“…VH: Borutzky (1962), Dartnall (2000), Karanovic et al (2013). BH: Borutzky & Vinogradov (1957), Bayly (1994), Bayly et al (2003), Karanovic et al (2013). McM: Murray (1910a), Hansson et al (2012), Karanovic et al (2013).…”

Section: Points Of Interest (Hexapoda)mentioning

confidence: 99%

“…LH: Dartnall (1995b). VH: Borutzky (1962), Dartnall (2000), Karanovic et al (2013). BH: Borutzky & Vinogradov (1957), Bayly (1994), Bayly et al (2003), Karanovic et al (2013).…”

Section: Points Of Interest (Hexapoda)mentioning

confidence: 99%

“…Dartnall & Hollwedel (2007) ascribed this species to the smaller Diacyclops they found in the Falkland Islands, but acknowledged the species is inadequately described and in need of revision. More recently Karanovic et al (2013) examined cyclopoid copepods from three ice covered lakes on Continental Antarctica and erected three new species -Diacyclops kaupi from the epishelf Transkriptsii Gulf, Bunger Hills, D. walkeri from epishelf Pineapple Lake, Vestfold Hills, and D. joycei from proglacial Lake Joyce, McMurdo Sound Dry Valleys. With the loss of the D. mirnyi type specimens new material is required to elucidate the status of all these records.…”

Section: Points Of Interest (Hexapoda)mentioning

confidence: 99%

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The freshwater fauna of the South Polar Region: A 140-year review

Dartnall¹

2017

PPRST

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The metazoan fauna of Antarctic and sub-Antarctic freshwaters is reviewed. Almost 400 species, notably rotifers, tardigrades and crustaceans have been identified. Sponges, molluscs, amphibians, reptiles and fishes are absent though salmonid fishes have been successfully introduced on some of the sub-Antarctic islands. Other alien introductions include insects (Chironomidae) and annelid worms (Oligochaeta). The fauna is predominately benthic in habitat and becomes increasingly depauperate at higher latitudes. Endemic species are known but only a few are widely distributed. Planktonic species are rare and only one parasitic species has been noted.

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Section: Points Of Interest (Hexapoda)mentioning

confidence: 99%

“…LH: Dartnall (1995b). VH: Borutzky (1962), Dartnall (2000), Karanovic et al (2013). BH: Borutzky & Vinogradov (1957), Bayly (1994), Bayly et al (2003), Karanovic et al (2013).…”

Section: Points Of Interest (Hexapoda)mentioning

confidence: 99%

Section: Points Of Interest (Hexapoda)mentioning

confidence: 99%

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The freshwater fauna of the South Polar Region: A 140-year review

Dartnall¹

2017

PPRST

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“…Diatoms likewise have been found to contain high levels of endemism, consistent with persistence through glaciations rather than recent colonization, though due to taxonomic confusion, their regional biogeography is still uncertain [455]. At the highest level of organization, there is mounting evidence of long-term persistence, through multiple glacial cycles, of freshwater crustacea in on-continent refugia [448,456].…”

Section: Antarctic Freshwater Habitatsmentioning

confidence: 99%

Characteristics, Main Impacts, and Stewardship of Natural and Artificial Freshwater Environments: Consequences for Biodiversity Conservation

Cantonati

Poikāne

Pringle

et al. 2020

Water

181

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In this overview (introductory article to a special issue including 14 papers), we consider all main types of natural and artificial inland freshwater habitas (fwh). For each type, we identify the main biodiversity patterns and ecological features, human impacts on the system and environmental issues, and discuss ways to use this information to improve stewardship. Examples of selected key biodiversity/ecological features (habitat type): narrow endemics, sensitive (groundwater and GDEs); crenobionts, LIHRes (springs); unidirectional flow, nutrient spiraling (streams); naturally turbid, floodplains, large-bodied species (large rivers); depth-variation in benthic communities (lakes); endemism and diversity (ancient lakes); threatened, sensitive species (oxbow lakes, SWE); diverse, reduced littoral (reservoirs); cold-adapted species (Boreal and Arctic fwh); endemism, depauperate (Antarctic fwh); flood pulse, intermittent wetlands, biggest river basins (tropical fwh); variable hydrologic regime—periods of drying, flash floods (arid-climate fwh). Selected impacts: eutrophication and other pollution, hydrologic modifications, overexploitation, habitat destruction, invasive species, salinization. Climate change is a threat multiplier, and it is important to quantify resistance, resilience, and recovery to assess the strategic role of the different types of freshwater ecosystems and their value for biodiversity conservation. Effective conservation solutions are dependent on an understanding of connectivity between different freshwater ecosystems (including related terrestrial, coastal and marine systems).

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“…The McMurdo Dry Valleys contain a number of closedbasin lakes (Chinn, 1993) that contain extensive benthic photosynthetic microbial mats (Parker et al, 1981;Wharton et al, 1983;Hawes et al, 2011). Microbial mat growth and biomass accumulation in the McMurdo Dry Valleys lakes are facilitated by a paucity of grazing and burrowing organisms (Quesada et al, 2008); the largest organism in Lake Joyce is a copepod (Karanovic et al, 2014). The perennial ice cover of McMurdo Dry Valleys lakes also eliminates wind-induced waves and currents, so there is little sediment erosion of the lake floors.…”

Section: Introductionmentioning

confidence: 99%

Growth of modern branched columnar stromatolites in Lake Joyce, Antarctica

et al. 2015

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Modern decimeter-scale columnar stromatolites from Lake Joyce, Antarctica, show a change in branching pattern during a period of lake level rise. Branching patterns correspond to a change in cyanobacterial community composition as preserved in authigenic calcite crystals. The transition in stromatolite morphology is preserved by mineralized layers that contain microfossils and cylindrical molds of cyanobacterial filaments. The molds are composed of two populations with different diameters. Large diameter molds (>2.8 μm) are abundant in calcite forming the oldest stromatolite layers, but are absent from younger layers. In contrast, <2.3 μm diameter molds are common in all stromatolites layers. Loss of large diameter molds corresponds to the transition from smooth-sided stromatolitic columns to branched and irregular columns. Mold diameters are similar to trichome diameters of the four most abundant living cyanobacteria morphotypes in Lake Joyce: Phormidium autumnale morphotypes have trichome diameters >3.5 μm, whereas Leptolyngbya antarctica, L. fragilis, and Pseudanabaena frigida morphotypes have diameters <2.3 μm. P. autumnale morphotypes were only common in mats at <12 m depth. Mats containing abundant P. autumnale morphotypes were smooth, whereas mats with few P. autumnale morphotypes contained small peaks and protruding bundles of filaments, suggesting that the absence of P. autumnale morphotypes allowed small-scale topography to develop on mats. Comparisons of living filaments and mold diameters suggest that P. autumnale morphotypes were present early in stromatolite growth, but disappeared from the community through time. We hypothesize that the mat-smoothing behavior of P. autumnale morphotypes inhibited nucleation of stromatolite branches. When P. autumnale morphotypes were excluded from the community, potentially reflecting a rise in lake level, short-wavelength roughness provided nuclei for stromatolite branches. This growth history provides a conceptual model for initiation of branched stromatolite growth resulting from a change in microbial community composition.

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Diacyclops (Copepoda: Cyclopoida) in Continental Antarctica, including three new species

Abstract: Contrary to earlier beliefs, crustaceans are present in ice-covered lakes of Antarctica.

Cited by 12 publications

References 35 publications

The freshwater fauna of the South Polar Region: A 140-year review

The freshwater fauna of the South Polar Region: A 140-year review

Characteristics, Main Impacts, and Stewardship of Natural and Artificial Freshwater Environments: Consequences for Biodiversity Conservation

Growth of modern branched columnar stromatolites in Lake Joyce, Antarctica

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