freshwater microalgae collected from pond, netrium digitus

aquarium aquatic benthic benthos biology cell chain charophyte chlorophyll contrast desmid desmidiacea digitus flora focus freshwater green hd hobby interference laboratory life light limnology macro micro microalgae microbe microbiology micrograph microorganism microscope microscopic microscopy nature netrium observation phytoplankton plankton pond protozoa reproduction research selective species unicellular water wildlife