Related by context. Frequent words. (Click for all words.) 70 aquatic ecosystems 70 habitats 67 ecosystems 66 habitat 65 aquatic habitat 64 aquatic species 64 wildlife habitats 63 coastal ecosystems 63 freshwater ecosystems 63 wetland habitats 63 wildlife habitat 61 marine ecosystems 60 wetland habitat 60 watersheds 59 habitat fragmentation 59 marine habitats 58 ecology 58 nesting habitat 58 seagrass beds 58 marine ecosystem 58 forest ecosystems 57 estuaries 57 spawning habitat 57 species 57 biota 57 riparian habitat 57 aquatic insects 57 wetlands 57 habitat restoration 57 aquatic organisms 56 ecosystem 56 freshwater wetlands 56 estuarine 56 biodiversity 56 ecologies 56 intertidal 55 tidal wetlands 55 eelgrass 55 ocean ecosystems 55 waterways 54 underwater grasses 54 fauna 54 waterfowl habitat 54 marine ecology 54 wetland restoration 53 salt marshes 53 ecological 53 wildlife 53 coral reefs 53 freshwater 53 harmful algal blooms 53 reefs 52 marine organisms 52 aquatic vegetation 52 wetland 52 insect populations 52 ecologically 52 benthic 52 bio diversity 52 Invasive species 52 spawning beds 51 keystone species 51 salt marsh 51 Coho salmon 51 waterbodies 51 flora 51 filter feeders 51 waterbirds 51 invasive species 51 streambeds 51 Ecologically 51 amphibians 51 marine biodiversity 50 dissolved oxygen levels 50 National Wildlife Refuges 50 habitat degradation 50 kelp forests 50 invertebrates 50 sedimentation 50 flora fauna 50 soils 50 aquatic creatures 50 sea creatures 50 vegetation 50 corals 50 headwater 50 shoreline erosion 49 trout fishery 49 Watersheds 49 shorelines 49 algal blooms 49 fragile ecosystems 49 salmonids 49 migratory fish 49 nonnative species 49 oyster reefs 49 organisms 49 biodiversity hotspots 48 freshwater lakes 48 nutrient runoff 48 nesting birds