Related by context. Frequent words. (Click for all words.) 60 overharvest 60 toxic algae blooms 59 overharvested 58 plankton blooms 58 swimmer itch 58 Infestations 57 quaggas 57 nitrogen deposition 57 toxic algae bloom 56 Algae blooms 56 red legged frogs 56 shearwater 56 mud snail 55 chytrid 55 leopard frogs 55 ciguatera 55 beachings 55 algal bloom 55 salmonella infections 55 infestation 54 migratory bird populations 54 rusty crayfish 54 Quagga mussels 54 nitrate contamination 54 beetle infestations 54 phytoplankton blooms 54 winterkill 54 species extinctions 54 Domoic acid 54 Sea otters 54 upwellings 54 amphipods 54 toxic algae 53 myxomatosis 53 northern snakehead 53 overhunting 53 wolf predation 53 Didymo 53 seabird populations 53 migrating ducks 53 amphibian populations 53 Predation 53 severe droughts 52 defoliating 52 salvinia 52 quagga mussel 52 flea beetles 52 tent caterpillars 52 elk bison 52 decaying vegetation 52 baleen whale 52 algal blooms 52 salination 52 chytrid fungus 52 invasive insect 52 fungal pathogen 52 Phytophthora ramorum 52 chytridiomycosis 52 harbor porpoises 52 voracious eaters 52 domoic acid 51 domoic acid poisoning 51 herbivory 51 Scientists theorize 51 infestations 51 overharvesting 51 predation 51 Emerald ash borer 51 threadfin shad 51 zebra mussel 51 harmful algae blooms 51 larval stages 51 Soil erosion 51 species 51 parasitic worm 51 Feral hogs 51 gobies 51 shovelnose 51 voracious predators 51 pocket gophers 51 raccoon rabies 51 killifish 51 terrestrial ecosystems 51 southward migration 51 Gypsy moths 51 protozoan 51 bioaccumulation 51 whale strandings 50 viral hemorrhagic septicemia 50 round gobies 50 rotting vegetation 50 endocrine disruption 50 Methylmercury 50 apple moth 50 aquatic invertebrates 50 spoonbill 50 extinctions 50 pheasant populations 50 White Nose Syndrome 50 stonefly 50 bee populations