Related by context. Frequent words. (Click for all words.) 59 Coral reef 56 Ocean acidification 56 delicate ecosystems 56 coastal ecosystems 55 climate change 55 species extinctions 55 harmful algal blooms 54 reef ecosystems 54 ecological degradation 54 harmful algae blooms 54 worsening droughts 53 global warming 53 phytoplankton blooms 53 ocean acidification 52 overfishing pollution 52 groundwater depletion 52 coral reefs 52 ocean acidity 52 coral reef ecosystems 52 freshwater ecosystems 52 Ocean Acidification 52 marine ecosystems 52 ozone layer depletion 52 Coral bleaching 52 seagrass meadows 51 ocean ecosystems 51 melting icecaps 51 plankton blooms 51 biodiversity 51 tropical deforestation 51 conserve biodiversity 51 deforestation 51 migratory bird populations 51 Soil erosion 51 marine ecosystem 51 marine biodiversity 50 freshwater habitats 50 seagrasses 50 shoreline erosion 50 nesting seabirds 50 Extinctions 50 habitat fragmentation 49 seagrass beds 49 Melting glaciers 49 Polar Regions 49 oceans 49 ecosystems 49 environmental degradation 49 iron fertilization 49 biodiversity hotspots 49 coral ecosystems 49 coastal erosion 49 Sea otters 49 subtropical regions 49 deplete oxygen 49 seabird populations 49 coral bleaching 49 insect borne diseases 49 endemism 49 rampant deforestation 49 conserving biodiversity 49 seawater intrusion 49 atmospheric ozone 49 overexploitation 49 terrestrial ecosystems 48 Antarctic ozone 48 rainforest destruction 48 frequent droughts 48 marine habitats 48 Hawaiian monk seals 48 whale strandings 48 greenhouse gases GHGs 48 obj obj = 48 greenhouse warming 48 AP Interview CG 48 upper troposphere 48 nutrient runoff 48 floods cyclones 48 Therein lurks 48 Palk Bay 47 Methylmercury 47 Christopher Flavin 47 ecological 47 admiral asks 47 Antarctic seas 47 overfishing 47 driest inhabited continent 47 longline fishing 47 chytridiomycosis 47 oceanic 47 Steve Curwood hosts 47 ecological disasters 47 coral reef 47 aquatic habitats 47 Equatorial Pacific 47 marine turtles 47 Everglades ecosystem 47 Ocean Observing 47 toxic algae blooms 47 El Nino Southern Oscillation 47 seas droughts