Related by context. Frequent words. (Click for all words.) 56 marshes 54 marshlands 53 freshwater 51 wetlands 51 river deltas 50 coastal wetlands 50 terrestrial ecosystems 49 freshwater ecosystems 49 marsh 49 seagrasses 48 marshland 48 wetland habitat 48 aquatic ecosystem 47 aquatic ecosystems 47 wetland 47 estuaries 47 freshwater mussels 47 aquatic habitats 47 coral reefs 46 oyster reefs 46 estuarine 46 tidal marsh 46 wetland habitats 46 lakes 46 coastal ecosystems 46 reed beds 46 peat bogs 45 canals 45 Euphrates rivers 45 aquatic habitat 45 ecosystems 45 waterway 45 headwater 45 seagrass beds 45 watersheds 45 estuary 45 tidal wetlands 45 coastal marshes 45 intertidal 44 spawning habitat 44 waterways 44 river basin 44 freshwater wetlands 44 salt marshes 44 reefs 44 freshwater lakes 44 silted 44 waterbirds 44 Lake Kinneret 44 eelgrass 44 underwater grasses 44 rivers 44 lake sediments 43 waterfowl habitat 43 wetland restoration 43 habitats 43 coral reef ecosystems 43 forest ecosystems 43 waterbodies 43 aquatic vegetation 43 Apalachicola River 43 marine ecosystem 43 basin 43 waterbody 43 ecologies 43 peatland 42 habitat 42 watershed 42 irrigated agriculture 42 shorelines 42 biota 42 mud flats 42 eel grass 42 Sediments 42 Estuaries 42 tidal creeks 42 drainage basins 42 sediment 42 saltwater intrusion 42 river basins 42 irrigation canals 42 hydrological cycle 42 wildlife habitats 42 peatlands 42 marsh grasses 42 aquatic weeds 42 ecosystem 42 mangrove forests 41 Fertile Crescent 41 sediments 41 mangrove 41 riparian habitat 41 bulrushes 41 Mangroves 41 Aral Sea 41 sedimentation 41 tributaries 41 navigable waterways 41 Marshes 41 headwaters 41 lake