Related by context. Frequent words. (Click for all words.) 77 marine ecosystems 75 marine ecosystem 70 ecosystems 65 coral reefs 65 reefs 62 plankton 61 oceans 61 overfishing 60 marine organisms 59 biodiversity 58 biosphere 58 estuaries 57 corals 57 habitats 56 ecosystem 55 aquatic species 55 phytoplankton 54 wildlife habitats 54 zooplankton 54 fragile ecosystem 54 acidification 54 coral reef 53 ocean acidification 53 bluefin tuna 53 fisheries 53 species 53 marine mammals 53 overfished 53 reef 53 habitat 52 freshwater 52 coastal wetlands 52 ecological 51 mangrove forests 51 atmospheric carbon dioxide 51 organisms 50 seagrass 50 fishery 50 sea creatures 50 coral 50 bottom trawling 50 krill 50 mangroves 50 wild salmon 49 wildlife habitat 49 ecology 49 bluefin 49 sea turtles 49 estuary 49 spawning grounds 49 ocean 48 invertebrates 48 algae blooms 48 tropical forests 48 mollusks 48 sea urchins 48 shorelines 48 Atlantic bluefin tuna 47 commercial whaling 47 carbon sinks 47 ocean currents 47 cetaceans 47 mammals 47 wetlands 47 extinctions 46 boreal forest 46 ecologically 46 algal blooms 46 rainforests 46 climate change 46 coastal waters 46 peatlands 46 invasive species 45 watersheds 45 anthropogenic 45 Barnegat Bay 45 seabirds 45 microbes 45 whales 45 atmospheric CO2 45 sea otters 45 aquaculture 45 groundfish 45 crustaceans 45 fish 45 oyster beds 45 salmon 45 dissolved oxygen 44 bycatch 44 menhaden 44 oceanic 44 fauna 44 algae 44 ICCAT 44 Arctic Ocean 44 toxic algae 44 blue crabs 44 Lubchenco 44 coastlines 44 planet 44 porpoises