pleurotaenium nodosum, a microscopic algae collected from pond

400x algae aquarium aquatic belonging benthic benthos biology cell chain charophyte chlorophyll collected contrast desmid desmidiacea flora focus freshwater green group hobby interference laboratory life light limnology live macro magnification micro microalgae microbe microbiology micrograph microorganism microscope microscopic microscopy nature nodosum objective observation phytoplankton plankton pleurotaenium pond protozoa reproduction research selective species stacked unicellular water wildlife