Plankton
Plankton is a crochet wrap illustrating the issue of nutrient pollution in Lake Champlain and its impacts on plankton communities. Multicolored yarn motifs are meant to represent a variety of zooplankton, and the blue-green are meant to represent blue-green algae (cyanobacteria). Moving from one end to the other, the blue green motifs are increasingly represented while the multicolored (zooplankton) are reduced, indicating an observed plankton community shift. The basis for this piece is a study by Bockwoldt et al. (2017) which found reduced phytoplankton and zooplankton diversity associated with increased cyanobacteria in Lake Champlain. The cyanobacteria increase is attributed to increased nutrient input including phosphorus which can contribute to harmful algal blooms.
More details available here on Ravelry.