New determination of Pediastrum orientale in polar lake sediments and its palaeoecological implications – Reindeer Lake, Bellsund, Spitsbergen

Author:

Pidek Irena AgnieszkaORCID,Dobrowolski RadosławORCID,Zagórski PiotrORCID,Rodzik JanORCID,Łokas EdytaORCID,Hajdas IrkaORCID

Abstract

The main component of microfossils in the bottom sediments of Reindeer Lake from Spitsbergen, documenting the almost 8,000-year history of this water body, are algae representing colonies of a very rare species Pediastrum orientale (Skuja) Jankovská et Komárek 1995 with only a very small (lower than 1%) admixture of other green algae species. It has also been recorded in other lake sediments in Spitsbergen. The specimens belong to the morphotype “b” of the species, known previously from the Scandinavian lakes. Due to its unique nature and scarce information on ecological conditions, this study analysed the palaeoenvironmental factors favouring the occurrence of Pediastrum orientale together with an assessment of its bioindication value. The affinity of the species to oligotrophic lakes, where blooms of this alga are observed, was confirmed. The presence of numerous colonies of Pediastrum orientale in fossil lake sediments can provide a rationale for inferring palaeoecological conditions, including the trophic state of water bodies, thus expanding knowledge of their evolutionary directions and documenting key events in the geological history of the catchment. Further studies of lake gyttjas in Spitsbergen should pay more attention to the taxonomic composition of Pediastrum and other green algae, as well as to the determinants of sediment deposition in different lake catchment environments.

Publisher

W. Szafer Institute of Botany Polish Academy of Sciences

Reference70 articles.

1. Bennett, K., Willis, K.J., 2001. Pollen. In: Birks, H.J.B., Last, W.M., (eds), Tracking Environmental Change Using Lake Sediments. Volume 3: Terrestrial, algal, and siliceous indicators. Springer, pp. 5-32.

2. Berglund, B.E., Ralska-Jasiewiczowa, M., 1986. Pollen analysis and pollen diagrams. In: Berglund, B.E. (ed.), Handbook of Holocene palaeoecology and palaeohydrology. Wiley & Sons, Chichester, pp. 455-484.

3. Bergström, A.-K., Jansson, M., 2006. Atmospheric nitrogen deposition has caused nitrogen enrichment and eutrophication of lakes in the northern hemisphere. Global Change Biology 12, 635-643. https://doi.org/10.1111/j.1365-2486.2006.01129.x

4. Birkenmajer, K., 2004. Caledonian basement in NW Wedel Jarlsberg Land south Bellsund, Spitsbergen. Polish Polar Research 27(2), 107-118.

5. Birks, H., Jones, V.J., Rose, N., 2004. Recent Environmental Change and Atmospheric Contamination on Svalbard as Recorded in Lake Sediments - Synthesis and General Conclusions. Journal of Paleolimnology 31, 531-546. https://doi.org/10.1023/B:JOPL.0000022550.81129.1a

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