Related by context. Frequent words. (Click for all words.) 54 lakes 52 rivers 51 aquatic habitats 51 Rotenone 51 Lake Champlain 51 freshwater lakes 51 Didymo 50 headwater 50 waterways 50 watersheds 50 tidal marshes 50 hemlock trees 50 purple loosestrife 50 beaver pond 50 aquatic ecosystem 50 Gypsy moths 49 mainstem 49 headwaters 49 Inland Bays 49 freshwater mussels 49 Batten Kill 49 Great Lakes basin 48 streams creeks 48 migrating waterfowl 48 wetland restoration 48 wetland habitat 48 saltmarsh 48 Quabbin Reservoir 48 invasive species 48 Eurasian watermilfoil 48 hemlock woolly adelgid 48 aquatic weeds 48 ponds 48 marsh 48 Suisun Marsh 48 Winooski River 48 headwater streams 48 tidal wetlands 47 Hydrilla 47 zebra mussel 47 wetlands 47 tributaries 47 phragmites 47 toxic algae blooms 47 adelgid 47 tamarisk 47 lakes ponds 47 didymo 47 rivers creeks 47 Eurasian milfoil 47 ice jams 47 Scotch broom 47 loosestrife 47 brookies 47 Altamaha 47 snow melt 46 Lake Scugog 46 Neponset River 46 wetland 46 vernal pools 46 lake 46 hardwood forests 46 salt marsh 46 mudflat 46 spotted knapweed 46 aquatic species 46 Pamlico Sound 46 milfoil 46 sediment 46 freshwater 46 rock snot 46 tributary streams 46 anadromous fish 46 outfalls 46 bottomland 46 Penobscot River 46 creeks rivers 46 alpine lakes 46 salt marshes 46 DNR biologist 46 grassland birds 46 estuaries 46 habitat restoration 46 melting glacier 46 streambed 46 saltcedar 46 algal bloom 46 reed beds 46 cattail 46 glacial lakes 46 streambeds 46 retreating glaciers 45 river 45 Willapa Bay 45 melting snowpack 45 invasive weed 45 freshwater wetlands 45 freshwater ecosystems 45 oxbow 45 arid regions 45 tailwaters