Relative abundance of diatoms in surface sediments of Lake Lama, supplement to: Kienel, Ulrike; Kumke, Thomas (2002): Combining ordination techniques and geostatistics to determine the patterns of diatom distributions at Lake Lama, Central Siberia. Journal of Paleolimnology, 28(2), 181-194

• Main Authors: Kienel, Ulrike, Kumke, Thomas, Melles, Martin
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2002
• Subjects: Event label; Latitude of event; Longitude of event; Elevation of event; DEPTH, sediment/rock; Achnanthes amoena; Achnanthes bioretii; Achnanthes calcar; Achnanthes chlidanos; Achnanthes clevei; Achnanthes daonensis; Achnanthes flexella; Achnanthes gracillima; Achnanthes kuelbsii; Achnanthes laevis; Achnanthes lanceolata var. frequentissim; Achnanthes laterostrata; Achnanthes marginulata; Achnanthes minutissima; Achnanthes oestrupii; Achnanthes petersenii; Achnanthes spp.; Achnanthes subatomoides; Achnanthes suchlandii; Amphipleura pelucida; Amphora aequalis; Amphora dusenii; Amphora fogediana; Amphora inariensis; Amphora libyca; Amphora oligotraphenta; Amphora ovalis; Amphora pediculus; Amphora staurosiroides; Asterionella formosa; Aulacoseira islandica; Aulacoseira subarctica; Brachysira spp.; Caloneis bacillum; Caloneis silicula; Campylodiscus hibernicus; Cyclotella aff. krammeri; Cyclotella comensis; Cyclotella gordonensis; Cyclotella kuetzingiana var. radiosa; Cyclotella radiosa; Cyclotella rossii; Cyclotella spp.; Cymatopleura solea; Cymbella spp.; Denticula kuetzingii; Denticula tenuis; Diatoma hyemalis; Diatoma mesodon; Diatoma tenuis; Didymosphenia geminata; Diploneis elliptica; Diploneis marginestriata; Diploneis spp.; Encyonema minutum; Encyonema silesiacum; Encyonema spp.; Epithemia adnata; Eunotia praerupta; Fragilaria brevistriata; Fragilaria capucina spp.; Fragilaria construens; Fragilaria nanana; Fragilaria pinnata; Fragilaria spp.; Fragilaria tenera; Gomphonema angustatum; Gomphonema angustum-clevei-rhombicum; Gomphonema spp.; Gyrosigma attenuatum; Hannea arcus; Hantzschia amphioxys; Meridion circulare; Navicula aboensis; Navicula bacilloides; Navicula constans; Navicula costulata; Navicula cryptocephala; Navicula cryptotenella; Navicula declivis; Navicula helensis; Navicula libonensis; Navicula margalithii; Navicula menisculus; Navicula minuscula; Navicula phylleptosoma; Navicula pseudolanceolata; Navicula pupula; Navicula radiosa; Navicula reichardtiana; Navicula rhynchocephala; Navicula spp.; Navicula submuralis; Navicula trivialis; Navicula viridula; Neidium spp.; Nitzschia acicularis; Nitzschia alpina; Nitzschia angustata; Nitzschia bacillum; Nitzschia dissipata; Nitzschia flexoides; Nitzschia fonticola; Nitzschia hantzschiana; Nitzschia intermedia ex. acula; Nitzschia linearis; Nitzschia palea; Nitzschia perminuta; Nitzschia spp.; Nitzschia sublinearis; Nitzschia tubicola; Oestrupia zachariasii; Pinnularia spp.; Reimeria sinuata; Rhoicosphenia cf. abbreviata; Rhopalodia gibba; Scoliopleura peisonis; Stauroneis spp.; Stephanocostis chantaicus; Stephanodiscus alpinus; Stephanodiscus hantzschii; Stephanodiscus medius; Stephanodiscus cf. minutulus; Surirella spp.; Synedra ulna; Tabellaria flocculosa; Diatoms indeterminata; Gravity corer Potsdam; Counting, diatoms; RU-Land_1997_Norilsk; AWI Arctic Land Expedition; Permafrost Research Periglacial Dynamics @ AWI AWI_PerDyn; Quaternary Environment of the Eurasian North QUEEN; Arctic; Complex Lake; Gibba; Western Basin; permafrost; Siberia
• Online Access: https://dx.doi.org/10.1594/pangaea.56972; https://doi.pangaea.de/10.1594/PANGAEA.56972

The patterns of spatial variation of diatom assemblages from surface sediments in Lake Lama were quantified using a combined approach of ordination and geostatistics. The aims were (i) to estimate the amount of variation between diatom assemblages within the lake, (ii) to model the spatial variability of the diatom assemblages and their diversity, and (iii) to map the diatom distributions in the lake. A correspondence analysis (CA) separated the diatom assemblages into a planktonic and a periphytic group. Rheophilic taxa were found within the periphytic group. Variogram analysis showed that only the sample scores of the first CA axis and the Shannon diversity index were spatially structured. The range of spatial correlation was estimated to be 55 km for both variables. The diversity and, to a lesser extent, the sample scores had considerable small-scale variability of about 20 and 3%, respectively. Estimates of the first component of the CA and the Shannon index were derived using block-kriging. The maps of the estimates provided a basis for partitioning Lake Lama according to the spatial structures into an eastern and a western basin, a north–south connection between the basins, and a north–south directed tip at the far eastern end. It was shown that variation in diatom assemblages is mainly spatially structured at the catchment scale and that there is a considerable amount of variation at smaller scales. According to the modeled spatial distribution, the assemblages are most likely affected by the lake size, morphology, and the water and nutrient input introduced by rivers. This has to be taken into account when paleolimnological interpretations are drawn from records of complex lake systems like Lake Lama.