Do P Cycling Patterns Differ Between Ice-Free Areas and Glacial Boundaries in the Maritime Antarctic Region?

Chacón, Noemí; Ascanio, Mildred N.; Herrera, R.; Benzo, Diana; Flores, Saúl; Silva, Soraya J.; García, Bellas

doi:10.1657/1938-4246-45.2.190

Cited by 3 publications

(2 citation statements)

References 77 publications

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“…Releasing biogenic components from such soils is hindered (Simas et al 2006). However, Chacon et al (2013) showed that the less extreme microclimatic conditions and the presence of liquid water in the ice-free area promote the biogeochemical cycling of soil P. Soils of the area contain secondary minerals, such as haematite and the intergrade chlorite-vermiculite-montmorillonite. Similarly, N in these soils usually has the form of a salt (Bolter 2011).…”

Section: Discussionmentioning

confidence: 99%

Ionic composition of terrestrial surface waters in Maritime Antarctic and the processes involved in formation

2014

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The qualitative and quantitative composition of major ions and nutrient compounds in surface waters and soils of the west coast of Admiralty Bay (King George Island, West Antarctica) was investigated together with the effect of soil-forming processes and atmospheric precipitation on the ionic composition of surface waters. In the water bodies studied, Cl- and Na+ were dominant major ions (average concentrations: 1102.2 and 930.9 μM, respectively). Average concentrations of the other major anions ranged from 2.80 μM (F-) to 81.64 μM (SO42-) and major cations ranged from 12.46 μM (K+) to 130.76 μM (Mg2+). Average concentrations of total reactive phosphorus, N-NO2-, N-NO3- and N-NH4+ amounted to 1.374, 0.410, 6.299 and 1.490 μM, respectively. Average concentrations of Ca, Mg, Na, K, N and P in the surface layer of the soil equalled 16.8, 15.9, 6.4, 3.6, 0.646 and 0.744 g kg-1, respectively. The calculated Na+/Cl-, Ca2+/Mg2+, Ca2+/Na+ and HCO3-/Cl- ratios revealed that atmospheric precipitation was the main source of major ions. We conclude that the ionic composition of the waters of the western coast of Admiralty Bay differ from surface waters of Continental Antarctica.

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Section: Discussionmentioning

confidence: 99%

Ionic composition of terrestrial surface waters in Maritime Antarctic and the processes involved in formation

2014

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“…Таким чином, оліготрофних водойм у досліджуваному районі нами поки не виявлено. Водночас, за межами дослідженого району для антарктичного острова Кінг-Джордж біля поль-ської станції «Арцтовський» разом із місцями впливу великих колоній птахів, відомі олігомезотрофні прісні водойми, які відносно віддалені від узбережжя (Chacón et al, 2013).…”

Section: матеріали і методиunclassified

Biogenic elements in terrestrial substrates, freshwater pools and subice seamples of the Argentine islands – Kyiv peninsula region, the Maritime Antarctic

Yarovyi¹,

Yevchun²,

Pishniak³

et al. 2021

Visn. ukr. tov. genet. sel.

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Aim. The aim was to estimate inflow of nitrogen and phosphorus to the terrestrial substrate, freshwater pools, as well as in the ice core and subglacial waters, from the sea-bird colonies, and locations of non-colonial flying birds, or individual colonial birds activity. Methods. The samples of substrates, fresh waters, ice cores and samples from the subglacial waters collected during the 25th (2019/20) and 26th (2020/21) Ukrainian Antarctic expeditions in the area of the Argentine Islands – Kyiv Peninsula were analyzed by selected indicators of ornithogenic impact – concentration of bioaviable forms of nitrogen and phosphorus. Results. The concentration for nitrogen and phosphorus are shown to be ornitogenic in samples from all explored locations. High concentrations of ornithogenic compounds were detected not only inflowing from birds colonies, in particular penguins, but also in samples without their influence. Conclusions. The obtained data confirm the high level of influence of both colonial and non-colonial birds on terrestrial and freshwater ecosystems of the Argentine Islands-Kyiv Peninsula. It is shown that the edifying effect and inflow of significant amounts of nitrogen and phosphorus occurs not only in large penguin colonies, but also in single nesting or feeding and resting areas of non-colonial flying birds, or in the presence of individual colonial birds in the study area. However, in the locations of large penguin colonies, easily disolved bioavailable forms of nitrogen and phosphorus are found in much higher, hypertrophic concentrations. Relatively low concentrations of nutrients are currently found only in areas that have recently been released from the glacier and remain uninhabited, unattractive or inaccessible to birds. Such locations are currently marked only on the coast of the Kyiv Peninsula and are associated with the recent retreat of local glaciers. In case of the presence of penguins or the activity of non-colonial or individual colonial birds, all studied freshwater pools were eutrophied to varying extend. The dynamics of organic matter inflow to some of the studied freshwater pools of the region probably indicates the permanent eutrophication. Studies of the ice core of the Galindez Island Glacier and subglacial freshwaters have shown that ornithogenic effects have been observed here for a long time.Key words: eutrophication, seabirds, the Antarctic, substrates, freshwater pools.

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Phosphatization under birds' activity: Ornithogenesis at different scales on Antarctic Soilscapes

et al. 2021

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Do P Cycling Patterns Differ Between Ice-Free Areas and Glacial Boundaries in the Maritime Antarctic Region?

Abstract: BioOne Complete (complete.BioOne.org) is a full-text database of 200 subscribed and open-access titles in the biological, ecological, and environmental sciences published by nonprofit societies, associations, museums, institutions, and presses.

Cited by 3 publications

References 77 publications

Ionic composition of terrestrial surface waters in Maritime Antarctic and the processes involved in formation

Ionic composition of terrestrial surface waters in Maritime Antarctic and the processes involved in formation

Biogenic elements in terrestrial substrates, freshwater pools and subice seamples of the Argentine islands – Kyiv peninsula region, the Maritime Antarctic

Phosphatization under birds' activity: Ornithogenesis at different scales on Antarctic Soilscapes

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