Related by context. Frequent words. (Click for all words.) 58 ecoregions 55 endemism 54 terrestrial ecosystems 54 wetland ecosystems 53 inland fisheries 52 coral ecosystems 51 freshwaters 51 freshwater 51 biodiversity hotspots 51 coral reef ecosystem 51 freshwater habitats 51 inter tidal 50 aquatic habitats 50 microbial ecology 50 biodiversity 50 Coral bleaching 49 hydrologic cycle 49 biodiversity hotspot 49 refugia 49 nesting habitats 49 species extinctions 49 freshwater ecosystems 49 bioregion 49 migratory bird populations 49 delicate ecosystems 48 conservation 48 ecosystems 48 nutrient loading 48 seagrasses 48 conserve biodiversity 48 coastal ecosystems 48 nitrogen deposition 48 predator prey relationships 48 marine ecosystems 48 temperate rainforest 48 northern fur seals 48 seagrass meadows 47 driest continent 47 nonpoint sources 47 conserving biodiversity 47 temperate forests 47 huntable 47 biogeochemical 47 biodiversity conservation 47 aquatic invertebrates 47 overharvested 47 habitat fragmentation 47 intertidal zone 47 Delaware Estuary 47 Schladow 47 forested lands 47 soil salinity 47 upland habitat 47 recharge groundwater 47 wild sockeye salmon 47 seawater intrusion 47 vaquita 47 phosphorus runoff 46 aquacultural 46 deplete oxygen 46 pristine coral reefs 46 Coral reef 46 semi arid regions 46 Greater Yellowstone Ecosystem 46 marine biodiversity 46 Phytoplankton 46 river catchments 46 Sea otters 46 ocean ecosystems 46 Polar Regions 46 Wadden Sea 46 overexploitation 46 ecological 46 migrating shorebirds 46 forest ecosystems 46 Project WET 46 reef ecosystems 46 intertidal 46 coral reef ecosystems 46 mussel species 46 marine invertebrates 46 Coral reefs 45 aquatic ecosystem 45 waterbird 45 wetland ecosystem 45 population densities 45 nitrification 45 Olive Ridleys 45 watersheds 45 estuarine 45 groundwater depletion 45 biodiverse 45 combating desertification 45 absorbs carbon dioxide 45 temperature gradients 45 RFMOs 45 marine habitats 45 elkhorn 45 overharvest 45 conserving 45 Benjamin H. Grumbles