The Holocene Diatom Flora of Marine Bays in the Windmill Islands, East Antarctica

Cremer, Holger; Roberts, D; McMinn, Andrew; Gore, Damian B.; Melles, Martin

doi:10.1515/bot.2003.010

Cited by 67 publications

(49 citation statements)

References 50 publications

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“…Medlin and Sims (1993) refer to Hasle's (1965) observations and add that although solitary, the two species have the same valve structure as other Fragilariopsis. Later on, Cremer in Cremer et al (2003) transferred N. peragallii to the genus Fragilariopsis, not having argued that transfer in any way. The present study represents the first EM description of F. peragallii.…”

Section: Description Of Fragilariopsis Speciesmentioning

confidence: 99%

“…It was restricted to slope waters of the WS (Table 4) at temperatures between -1.33 and -1.15°C and salinities from 33.17 to 33.33 psu. F. peragallii is described as a marine species, in both plankton and sea ice, present in the southern cold water region (Cremer et al 2003). F. peragallii is apparently rare, and it has been reported only a few times since the original description (Scott and Marchant 2005).…”

Section: Description Of Fragilariopsis Speciesmentioning

confidence: 99%

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Diversity of the diatom genus Fragilariopsis in the Argentine Sea and Antarctic waters: morphology, distribution and abundance

et al. 2010

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Section: Description Of Fragilariopsis Speciesmentioning

confidence: 99%

Section: Description Of Fragilariopsis Speciesmentioning

confidence: 99%

Diversity of the diatom genus Fragilariopsis in the Argentine Sea and Antarctic waters: morphology, distribution and abundance

et al. 2010

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“…122 in Taylor and McMinn, 2002). It has been described as a major component of phytoplankton 123 blooms in non-stratified or weakly stratified Antarctic surface waters (Cremer et al, 2003) (strong 124 water column stratification is usually associated with spring sea ice melt). T. antarctica has also 125 been associated with autumn bloom conditions in the Ross Sea with production of resting spores 126 related to the seasonally-late development of solid ice cover (Cunningham and Leventer, 1998).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Observations on the relationship between the Antarctic coastal diatoms Thalassiosira antarctica Comber and Porosira glacialis (Grunow) Jørgensen and sea ice concentrations during the late Quaternary

Pike

Crosta

Maddison

et al. 2009

Marine Micropaleontology

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Observations on the relationship between the Antarctic coastal diatoms Thalassiosira antarctica Comber and Porosira glacialis (Grunow) Jørgensen and sea ice concentrations during the Late Quaternary, Marine Micropaleontology (2009Micropaleontology ( ), doi: 10.1016Micropaleontology ( /j.marmicro.2009 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPTThe available ecological and palaeoecological information for two sea ice-related marine diatoms 35 (Bacillariophyceae), Thalassiosira antarctica Comber and Porosira glacialis (Grunow) Jørgensen, 36 suggests that these two species have similar sea surface temperature (SST), sea surface salinity 37 (SSS) and sea ice proximity preferences. From phytoplankton observations, both are described as 38 summer or autumn bloom species, commonly found in low SST waters associated with sea ice, 39 although rarely within the ice. Both species form resting spores (RS) as irradiance decreases, SST 40 falls and SSS increases in response to freezing ice in autumn. Recent work analysing late 41Quaternary seasonally-laminated diatom ooze from coastal Antarctic sites has revealed that sub- that used a coupled atmosphere-sea ice-vegation model forced with orbital parameters and 57 greenhouse gas concentrations. We find that abundance of P. glacialis RS is favoured by higher 58 A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT4 winter and spring sea ice concentrations and that a climatically-sensitive threshold exists between 59 the abundance of P. glacialis RS and T. antarctica RS in the sediments. An increase to >0.1 for the 60 ratio of P. glacialis RS:T. antarctica RS indicates a change to increased winter sea ice 61 concentration (to >80% concentration), cooler spring seasons with increased sea ice, slightly 62 warmer autumn seasons with less sea ice and a change from ~7.5 months annual sea ice cover at a 63 site to much greater than 7.5 months. In the East Antarctic sediment record, an increase in the ratio 64 from <0.1 to above 0.1 occurs at the transition from the warmer Hypsithermal climate into the 65 cooler Neoglacial climate (~4 cal kyr) indicating that the ratio between these two diatoms has the 66 potential to be used as a semi-quantitative climate proxy. antarctica RS-dominated sub-laminae that were deposited during autumn (Stickley et al., 2005). antarctica RS and P. glacialis RS sub-laminae from both sites, and from both time intervals, occur 88 at the top of late summer/autumn terrigenous-rich diatom laminae, which supports the contention 89 that these two diatoms have broadly similar ecological pre...

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“…This is important for interpreting sediment stratigraphies for applications such as the investigation of past biological communities (Cremer et al 2003) or environmental conditions (Taylor & McMinn 2001). It will also contribute to a better understanding of fundamental sediment processes such as nutrient mixing, oxygen penetration and the establishment of layers of different redox potential.…”

Section: Discussionmentioning

confidence: 99%

Bioturbation behaviour of the spatangoid urchin Abatus ingens in Antarctic marine sediments

Thompson¹,

Riddle²

2005

Mar. Ecol. Prog. Ser.

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A series of in situ and aquarium experiments were conducted in the vicinity of the Bailey Peninsula area (Casey Station, East Antarctica) to investigate the bioturbation behaviour of the Antarctic spatangoid urchin Abatus ingens (Koehler 1928). Rates of sediment transport by A. ingens were estimated from measurements of locomotion rates, sediment reworking depth and feeding rates. A. ingens bioturbates and feeds on the surface sediment (top 1 to 2 cm) by pushing diatom communities and sediment ahead and to the side of its track, thus increasing vertical and horizontal sediment transport. Over a 24 h period in situ, A. ingens spends prolonged periods of time stationary (16.7 h) and only short periods of time in locomotion (7.3 h). In the aquarium, however, A. ingens was observed to spend half of the time moving and the other half stationary. Locomotion rate measured in the aquarium was faster (

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The Holocene Diatom Flora of Marine Bays in the Windmill Islands, East Antarctica

Cited by 67 publications

References 50 publications

Diversity of the diatom genus Fragilariopsis in the Argentine Sea and Antarctic waters: morphology, distribution and abundance

Diversity of the diatom genus Fragilariopsis in the Argentine Sea and Antarctic waters: morphology, distribution and abundance

Observations on the relationship between the Antarctic coastal diatoms Thalassiosira antarctica Comber and Porosira glacialis (Grunow) Jørgensen and sea ice concentrations during the late Quaternary

Bioturbation behaviour of the spatangoid urchin Abatus ingens in Antarctic marine sediments

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