This document discusses different methods for sampling algae in environmental studies. It describes various field sampling techniques like water sampling, kick sampling, and plankton net tows to collect different types of algae. Samples then need to be preserved, usually with Lugol's solution, to maintain integrity for later analysis. Specific techniques are outlined for sampling phytoplankton, periphyton, attached algae, and benthic algae. Finally, the document reviews microscopic examination, cell counting, DNA analysis, and PCR as methods to identify and quantify the algae samples collected.