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(Click for frequent words.) 64 freshwater aquifer 63 upland forests 62 freshwater lakes rivers 61 sulfur springs 61 tidal salt marsh 61 alluvial plains 61 artesian springs 61 Brackish water 60 brackish marshes 60 upland habitats 60 wetland vegetation 60 marshes swamps 60 juniper forests 60 Lahontan cutthroat 60 cypress tupelo 60 coastal dune 60 limestone outcrops 60 freshwater mussel 59 longleaf pine ecosystem 59 freshwater habitats 59 volcanic lava 59 aquatic flora 59 hardwood swamps 59 alluvial plain 58 cypress swamp 58 limestone caves 58 sawgrass prairies 58 streambanks 58 mineral springs 58 decaying vegetation 58 algal mats 58 cedar glades 58 bottomland hardwoods 58 Vernal pools 58 pristine coral reefs 58 cypress forest 58 forested uplands 58 Ichetucknee River 58 upland meadows 58 oak groves 58 eroding shorelines 58 umbel 58 sandy ridges 58 freshwater wetland 58 cypress swamps 58 freshwater marshes 58 garigue 58 karst formations 57 karst limestone 57 karsts 57 Sand dunes 57 alluvial soils 57 bogs swamps 57 temperate rainforest 57 freshwater lakes 57 tarns 57 mangrove islands 57 bottomland hardwood forests 57 wetland ecosystem 57 karst topography 57 toxins leaching 57 lush flora 57 Corkscrew Swamp 57 freshwater marsh 57 saltwater marsh 57 dune lakes 57 mosses lichens 57 streamside forests 57 tannin stained 57 marsh marigolds 57 headwater stream 57 delicate ecosystems 56 tidal estuaries 56 aquatic grasses 56 riparian forests 56 fine grained sediment 56 Coconut palms 56 Sandbars 56 seacoasts 56 sandstone bluffs 56 Moapa dace 56 meadows woodlands 56 longleaf pine forests 56 Azolla 56 fringing reef 56 shell middens 56 freshwater ponds 56 apple snail 56 limestone formations 56 tidal marshes 56 riparian habitats 56 groundwaters 56 granite outcroppings 56 fertile lowlands 56 infertile soils 56 salt marsh habitat 56 pristine rainforests 56 coral formations 56 freshwater aquifers 56 forested watersheds 56 limestone grassland 56 cypress wetlands 56 montane forests 56 lakes 56 Navajo Sandstone 55 bottomland forests 55 Wekiwa Springs State 55 lakebeds 55 emergent vegetation 55 Lophelia 55 salt marsh grasses 55 freshwater aquariums 55 sandy plains 55 Freshwater mussels 55 Macquarie Marshes 55 trembling aspen 55 billabongs 55 chemosynthetic 55 cinder cones 55 breezes wafting 55 floras 55 Giant salvinia 55 Biscayne Aquifer 55 oak savannahs 55 saltpans 55 headwater streams 55 riparian woodlands 55 freshwater wetlands 55 thermal vents 55 limestone bedrock 55 tropical flora 55 mangrove vegetation 55 bottomland forest 55 basalt cliffs 55 planktons 55 saltmarshes 55 volcanic basalt 55 Ichetucknee Springs 55 sandy bottomed 55 bottomland hardwood forest 55 mudpots 55 grassy meadows 55 waterfowl habitats 55 oak hammock 55 Seagrasses 55 rills 55 riparian forest 55 Nyungwe Forest 55 cabbage palms 55 dense rainforests 55 Floridian aquifer 55 blackwater streams 55 Citrus groves 54 swampy lowlands 54 marine mollusks 54 Eelgrass 54 porous limestone 54 pine groves 54 subaqueous 54 bryophytes 54 hotsprings 54 lush subtropical 54 wetland soils 54 towering icebergs 54 freshwater mussels 54 sandy coves 54 elkhorn corals 54 Fakahatchee Strand 54 embayments 54 acquifers 54 subalpine meadows 54 acidic soils 54 limestone bluffs 54 bacterial mats 54 sandy shorelines 54 peat swamps 54 waterweed 54 seabeds 54 Baringo giraffes 54 mesic 54 headwaters 54 sandstone formations 54 reef habitats 54 Longleaf pine 54 chalky soil 54 tidal inlets 54 manmade ponds 54 tupelo 54 dune vegetation 54 mangrove estuaries 54 Nahanni River 54 mossy rocks 54 karstic 54 intertidal 54 Polluted runoff 54 mussel populations 54 Okareka 54 karst geology 54 woodland grassland 54 wetland ecosystems 54 cypress domes 54 Carden Alvar 54 spatterdock 54 freshwater lagoons 54 Kuiseb River 54 Gizzard shad 54 undeveloped shoreline 54 waterlilies 54 pigeon guillemots 54 bioluminescent bay 54 swamps marshes 54 fairy chimneys 54 spruce fir forest 54 bird rookeries 54 luxuriant vegetation 54 rivers estuaries 54 snail kite 54 volcanic caldera 54 beech forests 54 waterfalls caves 54 wooded ridges 54 saltwater marshes 54 eelgrass beds 54 sphagnum 53 sagebrush steppe 53 kaimoana 53 biodiverse ecosystems 53 Wacissa 53 Lake Mainit 53 deepwater corals 53 flatwoods 53 glacially carved 53 volcanic cones 53 eucalyptus groves 53 rocky headlands 53 groundwater aquifer 53 reedbeds 53 Erhai Lake 53 coralline 53 brackish lagoon 53 oak hickory forest 53 waterholes 53 kauri trees 53 fringed beaches 53 salicornia 53 estuaries bays 53 Sabal palms 53 shorebird habitat 53 sage scrub 53 estuarine waters 53 mangrove habitats 53 limestone cavern 53 sargassum 53 pristine rainforest 53 tidal mudflats 53 filter impurities 53 bougainvillaea 53 oak hammocks 53 mussel beds 53 banksias 53 Sugar maples 53 forests meadows 53 montane forest 53 limestone caverns 53 verdant forests 53 understorey 53 Tropical rainforests 53 lush forested 53 ornamental gardens 53 Wanaque Reservoir 53 undammed river 53 Domoic acid neurotoxin 53 tidepools 53 endangered wood stork 53 Microcystis aeruginosa 53 springwater 53 sedge grass 53 coastal lowlands 53 tropical savannah 53 tussock grass 53 equatorial rainforests 53 scenic waterfalls 53 hotspring 53 stonecrop 53 shallow aquifers 53 forested highlands 53 Sphagnum 53 coastal bluffs 53 spartina grass 53 banksia 53 forested wetlands 53 pearl oysters 53 elkhorn coral 53 glacial moraines 53 naturally occurring minerals 53 Algal bloom 53 swans glide 53 Water hyacinth 53 saltmarsh 53 prehistoric archaeological 53 streamside habitat 53 cottonwood groves 53 Salt marshes 53 bentonite clay 53 Pescadero Marsh 53 loess soil 53 brackish marsh 53 wetlands floodplains 53 intertidal marsh 53 rockweed 53 limestone sinkholes 53 rocky ridges 53 lily ponds 53 sulfate minerals 53 pickerel weed 53 coastal estuaries 53 bays estuaries 53 cottonwood willow 53 pristine coastline 53 riversides 53 seabird nesting 53 Ewaso Nyiro 53 watertable 53 glacial meltwater 53 barrens 52 riparian woodland 52 acid sulphate soils 52 fringing reefs 52 eucalyptus forests 52 green alga 52 Okataina 52 tableland 52 bubbling brooks 52 hypersaline 52 cork oaks 52 microhabitats 52 variable milfoil 52 Ozark Plateau 52 turtle nesting beaches 52 abyssal plain 52 flora 52 mangrove wetlands 52 pine flatwoods 52 Basking shark 52 spinifex 52 mangrove estuary 52 pristine beachfront 52 corals sponges 52 bull kelp 52 birdlife 52 sparse vegetation 52 sand verbena 52 mangrove ecosystems 52 rockpools 52 bottomlands 52 saltwater estuary 52 lacustrine 52 Overflowing rivers 52 oligotrophic 52 Bolinas Lagoon 52 endemic species 52 wetlands 52 Alviso Slough 52 Omo River 52 microscopic phytoplankton 52 biotopes 52 Hine emerald dragonfly 52 estuarine habitat 52 Morro Bay estuary 52 porous sandstone 52 Golfo Dulce 52 windblown sand 52 mixed conifer forests 52 coastal bays 52 longleaf pine trees 52 Lake Alaotra 52 Great Barrier reef 52 basalt rock 52 Little Assawoman Bay 52 endangered manatees 52 damming rivers 52 Dianchi Lake 52 smooth cordgrass 52 streambeds 52 shallow depressions 52 pebble beaches 52 semitropical 52 freshwater lake 52 intertidal zones 52 Microcystis 52 riparian corridors 52 tidal marsh 52 tributary rivers 52 microbialites 52 conodonts 52 pines oaks 52 freshwater ecosystems 52 Shivaliks 52 casuarinas 52 plantlife 52 Upper Floridan Aquifer 52 Saltcedar 52 Hueco Bolson 52 blackland prairie 52 Firehole River 52 colonial waterbirds 52 pearl mussel 52 salmon spawning grounds 52 rocky crags 52 biodiversity hotspot 52 cordgrass 52 rocky outcrops 52 McClusky Canal 52 lush paddy fields 52 oak savannah 52 massifs 52 fauna flora 52 tupelo trees 52 machair 52 coontail 52 swamp maples 52 freshwater snail 52 bald cypress trees 52 tributary creeks 52 calving caribou 52 mountain meadows 52 Salvinia molesta 52 limestone ledges 52 softshells 52 waterfowl nesting 52 sandpipers plovers 52 ARROWHEAD Water 52 Wekiwa Springs 52 Algae bloom 52 Alliston Aquifer 52 scrub shrub 52 navigable canals 52 aquatic fauna 52 seafloor sediments 52 coquina 52 alluvial flats 52 alongshore 52 prairie potholes 52 frangipani trees 52 La Parguera 52 Wollemi pines 52 Okarito 52 caves waterfalls 52 dwelling organisms 52 saltpan 52 Untreated sewage 52 coniferous forest 52 cajeput 52 sandy loams 52 phosphogypsum stacks 52 mussel species 52 unspoiled wilderness 52 Gopher tortoises 52 buckbrush 52 stony coral 52 tadpole shrimp 52 Usambara Mountains 52 Lake Bogoria 52 hot springs geysers 52 coquina rock 52 stately oak trees 52 shallow aquifer 52 virgin rainforests 52 eelgrass habitat 52 WEATHERFORD Water 52 underwater cavern 52 seashores 52 beaver ponds 52 Econfina 52 lyme grass 52 heathlands 52 estuarine ecosystem 52 herbaceous vegetation 52 gopher tortoise burrows 52 damsel flies 52 Least terns 52 riverbottom 52 biotope 52 fumaroles 52 saxifrage 52 shallow weedy 52 replenish aquifers 52 taiga forest 51 marram grass 51 reedbed 51 waterfalls ponds 51 native cutthroat trout 51 Olive Ridley Turtles 51 Ayung River 51 sticky sap 51 bottomland hardwood 51 Thurmond Dam 51 terminal moraine 51 peat soils 51 desiccating 51 Wular Lake 51 Devils Hole pupfish 51 riparian ecosystems 51 Delaware Inland Bays 51 staghorn coral 51 arundo 51 Kaituna River 51 Feitsui 51 pandanus 51 tidal estuary 51 Oyster reefs 51 upwellings 51 OAK CREEK Water 51 kahikatea 51 seagrass meadows 51 wet meadows 51 hydrated silica 51 creek bottoms 51 migratory songbird 51 tidal pools 51 estuarine habitats 51 river catchments 51 woodlands wetlands 51 tidal wetland 51 eucalyptuses 51 Ediacara 51 esker 51 #,# acre Soysambu 51 saltwater aquariums 51 beaver lodges 51 Tongkou flowed placidly 51 windswept dunes 51 piñon pine 51 ponds waterfalls 51 nonnative invasive 51 reservior 51 hardwood hammock 51 migrant songbirds 51 Heretaunga Plains 51 Tonle Sap lake 51 Caloosahatchee estuary 51 Peninsular bighorn sheep 51 fertile soils 51 Norway Svalbard 51 muddy bottoms 51 Daintree rainforest 51 aquatic ecosystems 51 cattail marshes 51 migratory corridors 51 cichlid fishes 51 Clarkia 51 oxbows 51 clayey 51 carob trees 51 blufflands 51 PALO DURO Water 51 Vilcanota river 51 cenotes 51 red sandstone cliffs 51 single celled algae 51 limber pine 51 alluvial soil 51 aspen grove 51 basalt rocks 51 Aquifers 51 seals sea otters 51 sedge meadow 51 shell midden 51 biologically diverse ecosystems 51 Remarkable Rocks 51 scablands 51 salty seawater 51 Alligator gar 51 drumlin 51 beech forest 51 misty mountains 51 sand dunes 51 SAM RAYBURN Water 51 wildflowers bloom 51 salt cedars 51 Prosopis juliflora 51 sponges corals 51 trout stream 51 studded hills 51 Grass carp 51 kelps 51 receding glacier 51 Desalinated 51 marine biota 51 endangered mussels 51 pickleweed 51 wetlands marshes 51 Econfina Creek 51 inland bays 51 karri 51 sandstone arches 51 bonneted bat 51 mangrove fringed 51 lava tubes 51 Chinch bugs 51 Garter snakes 51 eucalypt forests 51 gopher frog 51 flowering herb 51 meadowfoam 51 madrone trees 51 arid climates 51 freshwater tidal marsh 51 Ichetucknee 51 Lake Rotoiti 51 Typha 51 freshwater streams 51 subalpine 51 turquoise lagoons 51 nitrates phosphates 51 sewage outfalls 51 manmade pond 51 spruce fir forests 51 tortoise habitat 51 Undisturbed 51 limestone karsts 51 refugia 51 microscopic algae 51 Bogoria 51 reed beds 51 escarpments 51 oak savannas 51 pristine sandy beaches 51 mudflat 51 Rivanna River 51 bryozoan 51 bayberry 51 unspoilt scenery 51 orchids bloom 51 earthy scent 51 subterranean caves 51 garrigue 51 yucca plants 51 fritillaries 51 blackwater stream 51 upland habitat 51 coral habitats 51 granite domes 51 alpine lakes 51 Kariba Dam 51 wildflower displays 51 freshwater swamps 51 Steep slopes 51 undammed rivers 51 Savannas 51 OH IVIE Water 51 underwater volcanoes 51 Pepacton Reservoir 51 coldwater fish 51 glacier lilies 51 vegetations 51 fertilized lawns 51 semiarid regions 51 ecologically sensitive areas 51 Cycads 51 artesian spring 51 marshes 51 re vegetating 51 branching corals 51 apple snails 51 Artificial reefs 51 aquaculture ponds 51 Aquatic Preserve 51 shipworm 51 rhinoceros auklets 51 brackish groundwater 51 Pelorus Sound 51 elodea 51 Peat bogs 51 glaciers receded 51 saltwater lagoons 51 Rapidan River 51 coastland 51 Everglades ecosystem 51 terraced slopes 51 densely branched 51 heathland habitat 51 coulees 51 sassafras tree 51 whorled 51 ancient lakebed 51 algal species 51 cypress tupelo swamp 51 mossy forests 51 flora fauna 51 woody vines 50 northern leopard frogs 50 Giant Salvinia 50 luscious greenery 50 midge larvae 50 tidal creek 50 frogs salamanders 50 freshwater 50 holm oak 50 Zooplankton 50 Namib desert 50 coastal seabeds 50 scenic bluffs 50 turbid water 50 Eightmile 50 revegetating 50 Sinnemahoning Creek 50 Cape Poge 50 bunchgrass 50 wetlands flood plains 50 Aquia Creek 50 baldcypress 50 gently sloping hills 50 blue heron rookery 50 Peconic Estuary 50 tussock grasslands 50 Lake Lacawac 50 Chowilla 50 Yixian Formation 50 lush tropical rainforests 50 Iao Valley 50 Maui dolphin 50 Algae blooms 50 cherts 50 rock outcrops 50 pine savannas 50 hidden coves 50 spring ephemerals 50 Furnace Pond 50 Chihuahuan desert 50 nesting habitats 50 Cheoah River 50 Fynbos 50 heron rookery 50 ancestral Puebloan 50 glacial valleys 50 phosphates nitrates 50 Stagnant pools 50 Tsengwen 50 HUBBARD CREEK Water 50 towering Douglas firs 50 spawning kokanee 50 Arapaima gigas 50 broom sedge 50 Contaminated groundwater 50 surficial aquifer 50 freshwater invertebrates 50 wintering ducks 50 Nigeen lake 50 freshwater snails 50 Gangetic 50 rotting vegetation 50 resevoir 50 saltbush 50 cultch 50 salamander populations 50 Arctic grayling 50 aquatic insect 50 semidesert 50 mangrove roots 50 ancestral Puebloans 50 tarn 50 sassafras trees 50 silt laden 50 Sepik River 50 Kelani River 50 bellbirds 50 Lake Burragorang 50 drystone walls 50 lake 50 Burrendong Dam 50 scrubby vegetation 50 temperate rainforests 50 Teztan Biny 50 rainwater catchments 50 saltwater lagoon 50 waxy coating 50 New Zealand mudsnail 50 lowland rainforest 50 Sperm whale 50 flowway 50 stone cairns 50 acacias 50 melaleuca trees 50 majestic waterfalls 50 bladderwort 50 stately pines 50 toxic hydrogen sulfide 50 embayment 50 Belize Barrier Reef 50 rivers 50 bacterial decomposition 50 tropical coral reefs 50 Poyang Lake 50 artesian aquifer 50 mangrove shoreline 50 kelp beds 50 ecologically sensitive wetlands 50 microscopic creatures 50 Cottontails seek 50 CEDAR CREEK Water 50 lagoon 50 Great Crested Newts 50 limestone cave 50 longleaf pine forest 50 unicellular algae 50 hummocky 50 dense mats 50 unspoiled beaches 50 grassbeds 50 Saltwater intrusion 50 wetland ecology 50 ancient Hawaiians 50 Mangrove swamps 50 conifer forest 50 Garrapata 50 sediments deposited 50 naturally occurring mineral 50 azure ocean 50 wildlife corridors 50 meadowsweet 50 Paroo River 50 candlefish 50 cenote 50 palmetto scrub 50 Fakahatchee 50 clam beds 50 subtropical wilderness 50 heather moorland 50 pinon pine 50 wintering habitat 50 grasslands wetlands 50 underwater caves 50 polluted stormwater runoff 50 Loch Sunart 50 wetland buffers 50 marsh 50 native brook trout 50 Barataria basin 50 Titicaca 50 Wagonga Inlet 50 Threadfin shad 50 Amazonian forest 50 freshwater crayfish 50 gypsum stacks 50 snail kites 50 sandy bays 50 common murres 50 Mecox Bay 50 waterbodies 50 koa trees 50 brooks streams 50 mucilage 50 freshwater mollusks 50 lushly landscaped grounds 50 hemlock groves 50 dissolved oxygen DO 50 rhododendron thickets 50 Jocassee 50 cinder cone 50 Sluice gates 50 navigable rivers 50 babbling brooks 50 uncrowded beaches 50 cypress knees 50 basalt volcanic 50 vertebrate fossils 50 Morne Trois Pitons 50 prairie grassland 50 reed canary grass 50 redrock 50 bleached coral 50 Whatipu 50 gurgling streams 50 acid sulphate 50 camellias azaleas 50 hemlock forests 50 swaying coconut palms 50 cormorant colony 50 stringybark 50 hackberries 50 volcanic crater 50 phytoplankton zooplankton 50 limestone quarries 50 shifting sandbars 50 plankton bloom 50 phytoplankton bloom 50 inter tidal 50 eelgrass meadows 50 manzanitas 50 wetland grasses 50 piers docks 50 cypress pine 50 Ramsar wetland 50 Mesopotamian Marshlands 50 Great blue herons 50 chalk grassland 50 beautyberry 50 geothermally heated 50 sedimentation basins 50 invasive zebra mussels 50 backwater lakes 50 montane 50 parches 50 dunes 50 diatom species 49 estero 49 tickseed 49 lush meadows 49 phosphate mines 49 acid sulphate soil 49 tiny single celled 49 balds 49 microcystins 49 Caulerpa 49 Dredged 49 rockpool 49 lagoons 49 Ais Indians 49 casuarina trees 49 worms crustaceans 49 marsh marigold 49 Sediment cores 49 Tubli Bay 49 gentian 49 silicate rocks 49 rocky gorges 49 ferny foliage 49 Nottoway River 49 weed infestation 49 Pristine beaches 49 plantlike bacteria 49 Iguazu falls 49 green anole 49 impermeable shale 49 St. Lucie Estuary 49 sedimentary deposits 49 tidal marshlands 49 vernal pool species 49 Sea squirts 49 Bhitarkanika sanctuary 49 extinct volcanoes 49 Lyngbya 49 McMurdo Dry Valleys 49 outfall canal 49 lady slipper orchids 49 karst terrain 49 waterlily 49 flatback turtles 49 Paspalum 49 Driftwood Branch 49 oshanas 49 marsh grasses 49 Superstition Wilderness 49 Hydroelectric dams 49 oxbow lakes 49 karst caves 49 meandering creeks 49 Squamish Estuary 49 alkaline soils 49 paperbark 49 groundwater aquifers 49 grassy woodlands 49 rocky intertidal 49 maidenhair ferns 49 gannet colony 49 chickees 49 Drakes Estero 49 mineral salts 49 moorlands 49 holm oaks 49 calving glacier 49 gastropods 49 mangrove shorelines 49 shorebird nesting 49 hummocks 49 Carrowmore Lake 49 estuaries 49 limestone escarpment 49 Ocklawaha River 49 intertidal zone 49 tallgrass 49 fencerows 49 smog haze 49 globe mallow 49 mud snails 49 bracken ferns 49 ancient lava flows 49 tallgrass prairies 49 coral reef 49 ponderosas 49 Limahuli 49 teepee rings 49 savannah grassland 49 coralline algae 49 sumacs 49 SPENCE Water 49 Warm Springs Dam 49 water