geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

The phytoplankton of Lake Atnsjoen, Norway - a long-term investigation


, : The phytoplankton of Lake Atnsjoen, Norway - a long-term investigation. Hydrobiologia e; 521(1-3): 141-147

Quantitative samples were collected from Lake Atnsjoen five times per year in the growth seasons 1990-2000. The samples were analysed for variation in the phytoplankton composition, and the total volume and volume of the main groups of algae were calculated. Lake Atnsjoen is a large, deep and unregulated lake with a surface area of 4.8 km2 and a maximum depth of 80.2 m. It is a nutrient-poor, oligotrophic lake with a maximum phytoplankton volume varying between 125-393 mm3/m3 in the years 1990-2000. The phytoplankton community is dominated by species of the groups Chrysophyceae and Cryptophyceae. The chrysophytes dominate the phytoplankton in the early part of the growth season (May-June) while the cryptophytes increase throughout the season and dominate in the autumn. Among the chrysophytes different species of chrysomonads were most frequent together with common species of the genus Dinobryon like D. borgei, D. cylindricum var. alpinum and D. crenulatum. A total of 22 species or taxa of chrysophytes were recorded in the samples. Common among the cryptomonads were several species of the genus Cryptomonas. Most important quantitatively, however, were Rhodomonas lacustris and Katablepharis ovalis. The succesion of the phytoplankton throughout the growth season was similar from year to year in quantitative as well as qualitative terms, but some changes were recorded after the great flood in 1995. Canonical Correspondence Analysis (CCA) shows a slight, but significant, phytoplankton community change over the succeeding years.

US$29.90


Other references

Casey, Albert, 1963: Gregarious behavior in the rat as a function of secondary reinforcement, drive, and novelty. Dissert Absts 24(2): 843-844

Dawson, D.M., 1968: Enzymic conversion of uridine nucleotide to cytidine nucleotide by rat brain. After in vivo administration of [Cl4]uridine monophosphate to rats, radioactivity appears in cytidine nucleotides at comparable rates in the brain and the liver. An in vitro assay, on the soluble fraction of rat brain showed that the enzyme requir...

Nakai, S.; Saito, S.; Takeuchi, M.; Takimoto, Y.; Matsuo, M., 2003: The inorganic and organic characters for predicting bioconcentration on wide variety of chemicals in fish. The applicability of Fujita's inorganic (i) and organic (o) characters as descriptors for predicting bioconcentration factor (BCF) in fish was investigated with a wide variety of organic chemicals. Among 612 BCF data recently released by Nati...

Anonymous, 2011: Treatment outcome after low intensity chemotherapy CVP in children and adolescents with early stage nodular lymphocyte predominant Hodgkin’s lymphoma – An Anglo-French collaborative report. To examine whether three cycles of a low-intensity chemotherapy consisting of cyclophosphamide [5 mg/m day 1], vinblastine [6 mg/m days 1 and 8] and prednisolone [4 mg/m days 1 7] (CVP) is safe and therapeutically effective in children and adolesc...

Scott C.C.; Antoniades H.N.; Geyer R.P., 1981: Stimulation of lipid synthesis in human skin fibroblasts by platelet derived growth factor. Federation Proceedings 40(3 PART 1): 351

Hillman, L.; Peters, S.; Fisher, A.; Pomare, E.W., 1983: Differing effects of pectin, cellulose and lignin on stool pH, transit time and weight. Randomized cross-over studies were undertaken to determine the effects of daily dietary supplements of 12 g pectin, 15 g cellulose, and 12 g lignin per day on stool characteristics of healthy volunteers, keeping detailed dietary records throughou...

Morritt, A.; Knepil, G.; Henley, M., 2011: Slip and lock: a useful addition to the plastic surgeon's armamentarium. Journal of Plastic, Reconstructive & Aesthetic Surgery 64(4): E106-E106

Krausse, A.H., 1908: Eine neue Hummelform von Sardinien: Bombus hortorum wolffi m. Entomologisches Wochenblatt Leipzig, 25 94

Kehr, W.R., 1984: Registration of N.S. 62, N.S. 66, N.S. 67, and N.S. 80 yellow-flowered alfalfa germplasms. These 4 winter-hardy, synthetic Medicago sativa germplasms were developed from yellow-flowered plants selected from Vernal to provide yellow-flowered genetic marker germplasms.

Achmatowicz-Szmajke, T.; Bryl-Sandelewska, T.; Blum, A.; Witkowska, K., 1975: Studies on radiolysis of colistin sulfate. Acta Poloniae Pharmaceutica 32(1): 107-112