Modern Stromatolites in Antarctic Dry Valley Lakes

Parker, Barry; Simmons, George M.; Love, F. Gordon; Wharton, Robert A.; Seaburg, Kenneth G.

doi:10.2307/1308639

Cited by 109 publications

(34 citation statements)

References 14 publications

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“…Biomass analyses carried out on 5 subsamples (as shown in Table 2) revealed a high water content (87 .9%) and an ash/organic substance percentage ratio of 1 :2, showing that the mat is of a predominantly organic composition. The weight values for the organic substance (average 160 g m -2 ) appear to be very similar to those reported by Parker et al (1981) for algal mats found in the shallow waters of Lake Hoare (McMurdo Dry-Valleys, Southern Victoria Land) .…”

Section: Resultssupporting

confidence: 83%

Floristic studies on freshwater algae of Lake Gondwana, Northern Victoria Land (Antarctica)

1995

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Benthic algal mats and phytoplankton of Lake Gondwana (Northern Victoria Land, Antarctica) were investigated. Biomass, chlorophyll content and floristic analyses were carried out on algal mats. The mars are composed of two layers different in colour, floristic composition and chlorophyll content. The algal flora of the mats amount to 34 taxa (19 Cyanophyta, 7 Bacillariophyta, 8 Chlorophyta). The phytoplankton community is species-poor (only 5 taxa). Cryptophyta account for about 98% of total algal density

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Section: Resultssupporting

confidence: 83%

Floristic studies on freshwater algae of Lake Gondwana, Northern Victoria Land (Antarctica)

1995

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“…Both paleolatitude and obliquity information should be present in a given sample provided of course the stromatolite microorganisms were responding to direct (specular) solar radiation. * If responding entirely to diffuse radiation, neither type of information would be preserved; as an extreme example, stromatolite formation in Antarctic lakes (Parker et al, 1981).…”

Section: The Stromatolite Anabaria Juvensismentioning

confidence: 99%

Stromatolites and earth—sun—moon dynamics

Vanyo

Awramik

1985

Precambrian Research

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Vanyo, J.P. and Awramik, S.M., 1985. Stromatolites and Earth--Sun--Moon dynamics.Precambrian Res., 29 : 121--142.Inclination of stromatolite columns, caused by nonvertical direction of averaged incident solar radiation, provides a signal for deducing astronomical and geophysical data at time of stromatolite formation. A sample of Anabaria juvensis (Bitter Springs Formation, central Australia) shows a sinusoidal growth pattern which, interpreted as an annual signal (obliquity of the ecliptic) with daily production of laminae, indicates 435 days per year, a result consistent with other available estimates. A sample of Inzeria from the same formation also shows a sinusoidal pattern and a similar estimate for days per year. Both samples indicate growth rates of centimeters per year. Several laboratory measurement techniques offer systematic procedures for extracting data.

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“…In addition to this ice-bound ecosystem, the sub-ice environments include benthic mats thought to be analogues of Precambrian stromatolites (Parker et al, 1981;Wharton et al, 1982) and plankton adapted to extremes in temperature and sunlight (Lizotte and Priscu, 1992;Morgan-Kiss et al, 2006). Lake properties affected by sediment transport include water column turbidity and primary productivity (Foreman et al, 2004), water column nutrient enrichment (Dore and Priscu, 2001), availability of organic compounds for benthic heterotrophs (Simmons et al, 1986), and the flux of microorganisms through lake ice to the water column .…”

Section: Introductionmentioning

confidence: 99%