Related by context. Frequent words. (Click for all words.) 74 Algae blooms 65 toxic algae blooms 64 phytoplankton blooms 63 algal blooms 62 harmful algae blooms 61 algae blooms 60 Soil erosion 60 toxic algae 58 algal bloom 57 upwellings 57 oxygen depletion 57 Domoic acid 57 Melting glaciers 56 Volcanic eruptions 56 Peanut allergies 56 swimmer itch 56 species extinctions 56 harmful algal blooms 55 algae bloom 55 toxic algae bloom 55 Ocean acidification 55 Didymo 55 Ice jams 55 Seasonal rains 54 ocean acidity 54 microscopic algae 54 El Nino warming 54 eutrophication 54 salination 54 Infestations 54 inland bays 54 plankton blooms 53 Zebra mussels 53 salvinia 53 Rip currents 53 Invasive plants 53 deplete oxygen 53 Peanut allergy 53 amphipods 53 Tidal waves 53 gyres 53 Hip fractures 53 cankers 52 Northerly winds 52 whale strandings 52 freshwater lakes 52 temperature inversions 52 La Nina cooling 52 Hydrilla 52 ciguatera 52 algae 52 Southerly winds 52 intersex fish 52 Warming temperatures 52 Droughts 52 Severe drought 52 severe droughts 52 nutrient loading 52 Cyanobacteria 52 Vibrio 52 harbor porpoises 52 Equatorial Pacific 52 acidification 52 sea lampreys 51 Sea otters 51 chytrid fungus 51 dissolved oxygen levels 51 bioaccumulation 51 Drownings 51 Gypsy moths 51 soil salinity 51 El Niños 51 Warmer temperatures 51 sewage discharges 51 sooty mold 50 Warm temperatures 50 Esophageal cancer 50 Melanomas 50 rotting vegetation 50 overharvest 50 sonar exercises 50 aquatic weeds 50 potent neurotoxin 50 warmer wetter 50 Nitrogen oxides 50 winterkill 50 Ultraviolet radiation 50 Farmed fish 50 drier summers 50 Pfiesteria 49 powerful neurotoxin 49 nutrient runoff 49 round gobies 49 Quagga mussels 49 Migrating birds 49 Phragmites 49 Poison ivy 49 copepods 49 Genital warts 49 mussel species 49 terrestrial ecosystems