Related by context. Frequent words. (Click for all words.) 61 algal bloom 60 Hydrilla 60 aquatic weeds 59 toxic algae blooms 59 duckweed 59 Eurasian milfoil 59 algae 58 alga 58 microscopic algae 57 toxic algae 56 algae blooms 56 algae bloom 56 harmful algal blooms 55 Didymo 54 loosestrife 53 cattail 53 nutrient loading 53 zebra mussels 53 phragmites 53 algal blooms 52 zebra mussel 52 hydrilla 52 quagga mussel 52 milfoil 52 eelgrass 51 aquatic vegetation 51 Eurasian watermilfoil 51 toxic algae bloom 51 Poison ivy 51 seagrasses 51 cyanobacteria 51 purple loosestrife 51 freshwater mussels 51 algal 50 eel grass 50 invasive weed 50 microorganism 50 invasive species 50 micro organism 50 sea squirts 50 round goby 49 water hyacinth 49 Lake Macatawa 49 naturally occurring bacteria 49 Invasive species 49 insect populations 49 anaerobic bacteria 49 Rotenone 49 shoreline erosion 48 bacteria 48 nonpoint source pollution 48 bacterial 48 protozoan 48 harmful pathogens 48 viral hemorrhagic septicemia 48 Daphnia 48 freshwater ecosystems 48 mayflies 48 aquatic ecosystems 48 dinoflagellates 48 oxygen depletion 48 fungal 47 filter feeders 47 soybean aphid 47 nutrient pollution 47 fungi 47 eutrophication 47 Zebra mussels 47 hemlock woolly adelgid 47 aquatic ecosystem 47 mussels 47 marsh grasses 47 terrestrial ecosystems 47 Algae 47 Gypsy moths 47 aquatic insects 47 shoaling 47 turbidity 47 rock snot 47 Vibrio 47 mussel 47 Infestations 46 aquatic habitats 46 nutrient runoff 46 Japanese knotweed 46 freshwater lakes 46 diatoms 46 underwater grasses 46 whitefly 46 microorganisms 46 aquatic organisms 46 sediment 46 Lionfish 46 mollusks 46 dissolved oxygen levels 46 turbid 46 pollinating insects 46 seaweeds 46 rotenone 46 fireweed 46 didymo