Related by context. Frequent words. (Click for all words.) 54 ocean ecosystems 53 marine ecosystems 53 marine biodiversity 52 Klaus Toepfer 51 seagrasses 51 oceans 51 freshwater ecosystems 51 Michel Jarraud 50 coral reef ecosystems 50 biodiversity 50 overfishing pollution 50 overexploitation 50 coastal ecosystems 50 conserve biodiversity 49 coral reefs 49 Achim Steiner 48 biosphere 48 terrestrial ecosystems 48 IUCN 48 marine ecosystem 48 species extinctions 48 planktonic 48 polar regions 48 James Leape 48 Ocean acidification 47 aquatic ecosystem 47 habitat fragmentation 47 mammals 47 humankind 46 Polar Regions 46 atmospheric methane 46 stratospheric ozone 46 drylands 46 aquatic ecosystems 46 ecosystems 46 apex predators 45 dugongs 45 greenhouse gases GHGs 45 marine habitats 45 Mark Serreze 45 Unep 45 whales dolphins 45 amphibian populations 45 organisms 45 mangrove forests 45 species 45 Environment Programme 45 Nature IUCN 45 Overfishing 44 bio diversity 44 mankind 44 biodiversity hotspots 44 rampant poaching 44 fisheries 44 habitat degradation 44 overfishing 44 Millennium Ecosystem Assessment 44 biota 44 Coral reefs 44 Atlantic Tunas ICCAT 44 Ozone Layer 44 longline fishing 44 ecological degradation 44 Program UNEP 43 ozone depleting substances 43 Biodiversity 43 admiral asks 43 habitats 43 filter feeders 43 acidifying 43 amphibian species 43 polar caps 43 Hideki Moronuki 43 marine turtles 43 river deltas 43 biodiverse 43 overhunting 43 dolphins whales 43 Northwestern Hawaiian Islands 43 extinctions 43 extinction 43 NOAA fisheries 43 temperate forests 43 marine mammals 43 protective ozone layer 42 anthropogenic 42 mass extinctions 42 ocean 42 mammal 42 seabeds 42 frequent droughts 42 critically endangered species 42 Coral Triangle 42 World Meteorological Organisation 42 humanity 42 Atlantic Tunas 42 marine invertebrates 42 benthic 42 corals 42 marine 42 vertebrate species