Record Display for the EPA National Library Catalog


Main Title Systematic, Quantitative, and Ecological Comparison of 'Melosira islandica' O. Muell with M. granulata' (EHR.) Ralfs from the Laurentian Great Lakes.
Author Stormer, E. F. ; Kreis, Jr., R. G. ; Sicko-Goad, L. ;
CORP Author Michigan Univ., Ann Arbor. Great Lakes Research Div.;Environmental Research Lab.-Duluth, MN.
Year Published 1981
Report Number EPA-R-805796; EPA-600/J-81-642;
Stock Number PB83-243592
Additional Subjects Ecology ; Diatoms ; Phytoplankton ; Great Lakes ; Abundance ; Populations ; Cell morphology ; Cytoplasm ; Comparison ; Distribution(Property) ; Cell wall ; Photomicrographs ; Reprints ; Melosira granulata ; Melosira islandica
Library Call Number Additional Info Location Last
NTIS  PB83-243592 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 14p
Melosira granulata and M. islandica occur sympatrically in the Laurentian Great Lakes, but maximum population abundance of the two species occurs at opposite ends of the range of seasonal and trophic conditions found in the system. Both species are polymorphic, but are distinguishable on the basis of a number of morphological characteristics. Their distribution and the range of morphologic variation encountered in populations from the Great Lakes is summarized and discussed. Although ranges in size and computed cell volumes of populations of the two species overlap, there are significant differences in cellular composition. Cells of M. islandica contain a much larger fraction of living cytoplasm and cell wall material than cells of M. granulata. (Copyright (c) Internat. Assoc. Great Lakes Res., 1981.)