Related by context. Frequent words. (Click for all words.) 61 biodiversity hotspot 59 biodiversity hotspots 59 marine biodiversity 54 freshwater ecosystems 54 ecologies 53 biodiversity 53 coral reef ecosystems 53 ecosystems 52 terrestrial ecosystems 52 temperate forests 52 marine ecosystems 52 bio diversity 51 coastal ecosystems 51 ocean ecosystems 51 lowland forests 51 marine habitats 51 coral reefs 50 geomorphology 50 coral reef 50 biologically diverse 50 subtropical regions 50 biota 50 aquatic habitats 49 vertebrate species 49 landform 49 forest ecosystems 49 paleoclimate 49 biosphere 49 amphibian populations 49 drylands 49 microfossils 48 marine ecosystem 48 marine sediments 48 Amazon Rainforest 48 Polar Regions 48 hydrological cycle 48 seabeds 48 species extinctions 48 planet 47 biodiverse 47 microbiota 47 Antarctic ozone 47 aquatic ecosystem 47 Cerrado 47 faunal 47 amphibian species 47 stratospheric ozone layer 47 barrier reef 47 biomes 47 reefs 47 tropical rainforest 47 driest continent 47 systematics 47 Everglades ecosystem 47 freshwater wetlands 46 ecology 46 wetland habitats 46 freshwater lakes 46 ecological 46 landforms 46 Yellowstone ecosystem 46 invertebrate species 46 species 46 coral species 46 Coral reefs 46 Amazonian rainforest 46 lake sediments 46 Remote sensing 46 geologic 46 archipelagos 46 Coral Triangle 46 CO2 sequestration 46 Carbon sequestration 46 Arctic permafrost 45 seagrasses 45 Soil erosion 45 oceans 45 fragile ecology 45 intertidal 45 irrigated agriculture 45 aquatic ecosystems 45 stromatolites 45 kelp forests 45 southernmost continent 45 marine invertebrates 45 Ningaloo 45 headwater streams 45 tropical rainforests 44 boreal 44 foraminifera 44 Titan Saturn 44 cryosphere 44 Galapagos islands 44 megafauna 44 endangered primates 44 river deltas 44 Ocean acidification 44 geological formations 44 mangrove forests 44 BY VINCENT MAO 44 grassland habitat