![Sample our Environment & Agriculture journals, sign in here to start your access, latest two full volumes FREE to you for 14 days]({"type":"image" , "src" : "/sda/5934/TOC-Subject-Sample-2021-Environment-Agriculture.jpg"})
Abstract
Populations of Nitzschia frustulum-like diatoms occurred in high relative frequencies in periphyton samples from the shore of the Schlei estuary (Schleswig-Holstein, FRG). The populations were examined by light and electron microscopy and analyzed with respect to variation in valve characters, such as length, breadth, fibula density, valve outline, velum structure, the presence of central raphe endings and doubling of the striae near the raphe. Correlations were sought between morphological variation and variation in certain chemical parameters of the environment. A taxonomic determination of the populations is given. The presence of central raphe endings is not always accompanied by a wider separation of the two central fibulae.
