Related by context. Frequent words. (Click for all words.) 51 ocean ecosystems 50 mass extinctions 49 marine ecosystems 48 journal Nature Geoscience 48 overfishing 47 Overfishing 47 overexploitation 46 Dalhousie University 46 polar bear populations 46 aquatic ecosystems 46 marine ecosystem 46 marine ecology 45 Nature Geoscience 45 mountain glaciers 45 phytoplankton 45 extinctions 45 ocean acidification 44 acidification 44 greenhouse warming 44 plankton 44 reefs 44 coral reefs 44 oxygen depletion 43 cod fishery 43 diatoms 43 algal blooms 43 sea lice 43 marine organisms 43 eutrophication 43 zooplankton 43 copepods 43 coral bleaching 42 baiji 42 journal Geophysical Research 42 fisheries 42 narwhal 42 Coral reefs 42 seagrass beds 42 British Antarctic Survey 42 marine biologists 41 amphibian species 41 leatherbacks 41 ecosystems 41 Serreze 41 megafauna 41 corals 41 marine biodiversity 41 atmospheric carbon dioxide 41 oceanographers 41 algal bloom 41 algae blooms 41 Antarctic Peninsula 41 oyster reefs 40 marine biologist 40 sediment cores 40 Antarctic Ice 40 Pielke 40 coastal ecosystems 40 alewives 40 NSIDC 40 oceanographer 40 habitat degradation 40 Geophysical Research 40 Greenland ice 40 krill 40 estuarine 40 bee populations 39 Landsea 39 eelgrass 39 saltwater intrusion 39 dissolved oxygen levels 39 freshwater 39 overharvesting 39 estuaries 39 oceans 39 journal Science 39 geoscientist 39 alewife 39 glaciers 39 PNAS paper 39 polar caps 38 glaciologist 38 UN Intergovernmental Panel 38 Killer whales 38 coral species 38 seamounts 38 sockeye salmon 38 ecologists 38 Lamont Doherty Earth 38 ozone depletion 38 filter feeders 38 bottom trawling 38 atmospheric CO2 38 Oceanography 38 overfished 38 ocean currents 38 domoic acid 38 whales dolphins 38 pelagic 38 Himalayan glaciers 38 killer whales