Our objective was to determine whether differences in hydraulic and substrate conditions cause phenotypic plasticity in nymphs of the stoneflyNemoura cinereaRetzius. We experimentally manipulated near-bed current velocities (3 and 9 cm/s) and substrate types (medium sand and coarse gravel) in indoor ...
bufo, Rana perezi) and birds (Ardea cinerea, Phalacrocorax carbo, Larus cachinnans). The Montesquiu reserve area is in the middle-upper basin and comprises an important calcareous area with remarkable slab-bottom streams. In the lower Ter, there is a small protected area that includes ...
Nemoura cinerea and Nemurella pictetii populations were studied in two lowland streams in southern Poland. The sizefrequency and the Zelinka methods were employed to estimate their production. The production, as measured by the two methods, proved strongly dependent upon the character of the ...