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(Click for frequent words.) 56 infertile soils 56 reef habitats 55 Miocene epoch 55 filamentous algae 55 tadpole shrimp 55 Seagrasses 54 subalpine 54 tropical coral reefs 54 Water hyacinth 54 brackish marshes 54 bryozoan 54 coniferous forest 54 thermal vents 54 aquatic fauna 54 rocky intertidal 54 upland forests 54 Zooplankton 53 bryophytes 53 limestone outcrops 53 tussock grass 53 rhizosphere 53 coldwater streams 53 Eelgrass 53 saltmarshes 53 ostracods 53 glaciers receded 53 Azolla 53 montane 53 freshwater ponds 53 montane forests 53 riparian habitats 53 diatom species 53 Sphagnum 53 microbialites 53 freshwater snails 53 glacial moraine 52 endemic species 52 coldest driest 52 floras 52 alluvial plains 52 corals sponges 52 freshwater mussel 52 temperate rainforest 52 single celled algae 52 Lahontan cutthroat 52 subalpine meadows 52 liverworts 52 freshwater ecosystems 52 crinoids 52 abyssal plain 52 Ontario Lacus 52 Microcystis aeruginosa 52 southern latitudes 52 bunchgrass 52 freshwater habitats 52 alluvial soils 52 elodea 51 Lophelia 51 Lake Alaotra 51 smooth cordgrass 51 sea hydrothermal vents 51 wetland ecosystem 51 floristic 51 brackish marsh 51 luxuriant vegetation 51 moist soils 51 lemur species 51 seagrass meadows 51 lush subtropical 51 Alligator gar 51 mosses lichens 51 Sabal palms 51 beech forest 51 wetland vegetation 51 montane forest 51 hypersaline 51 bays estuaries 51 microhabitats 51 biotope 51 limestone grassland 51 Cenozoic era 51 lady slipper orchids 51 species 51 tidal salt marsh 51 freshwater invertebrates 51 spruce fir forest 51 temperate forests 51 marram grass 51 coccolithophores 51 watermilfoil 51 Pelorus Sound 51 Kihansi spray toad 51 Purple loosestrife 51 McMurdo Dry Valleys 51 Typha 50 semitropical 50 coastal bays 50 cladophora 50 coniferous forests 50 southerly latitudes 50 wetter climates 50 windswept dunes 50 spruce fir forests 50 salt marsh habitat 50 biodiverse ecosystems 50 prairie grassland 50 Palaeozoic era 50 unfished 50 dwelling invertebrates 50 biotopes 50 bryozoans 50 glaciers retreated 50 subtropical rainforest 50 Lake Champlain basin 50 pearl mussel 50 freshwater fishes 50 Mosquito larvae 50 sedge grass 50 saltbush 50 bracken fern 50 Lake Umbagog 50 broadleaf forests 50 plantlife 50 Permian Period 50 chalky soil 50 equatorial rainforests 50 Succulent Karoo 50 tiny single celled 50 Corkscrew Swamp Sanctuary 50 wintering waterfowl 50 Alexandrium 50 streamside forests 50 Carden Alvar 50 faunal 50 limestone outcroppings 50 banksias 50 stonecrop 50 sage scrub 50 sandy shorelines 50 evergreen forests 50 umbel 50 reef fishes 50 refugia 50 Salvinia molesta 50 drumlin 50 Gondwanan 50 freshwater lakes rivers 50 stony corals 50 tropical savannah 50 Bahia Grande 50 Caulerpa 50 polychaete worms 50 lowland forest 50 freshwater swamps 50 equatorial forests 50 echinoderm 50 waterfowl nesting 50 fertile lowlands 50 lush flora 50 desertified 50 cypress tupelo 49 sandy plains 49 dwarf crocodiles 49 subarctic 49 Delaware Inland Bays 49 prairie pothole 49 semidesert 49 beech forests 49 Wollemi pine 49 black swallow wort 49 vernal ponds 49 freshwater aquifer 49 lungless salamander 49 Lake Lacawac 49 tropical flora 49 Appy Sluijs 49 Tropical rainforests 49 aspen parkland 49 Phragmites australis 49 microbial mats 49 acidic soils 49 Giant hogweed 49 Salvinia 49 creatures inhabiting 49 drumlins 49 hydrothermal vent 49 Neogene 49 freshwater lagoons 49 freshwater jellyfish 49 scrub shrub 49 Mata Atlantica 49 Inuit Eskimos 49 cypress tupelo swamp 49 woodland habitats 49 seagrasses 49 Late Devonian 49 virginica 49 eucalypt forests 49 aquaculture ponds 49 saltwater estuary 49 Erhai Lake 49 Longleaf pine 49 colonial waterbirds 49 heathlands 49 Sand dunes 49 outwash 49 tickseed 49 lichens 49 Okarito 49 polar oceans 49 freshwater 49 droughty 49 Spartina alterniflora 49 upland meadows 49 stromatolites 49 Puijila 49 grassy meadows 49 bellbirds 49 seabed sediments 49 estuarine waters 49 loamy soil 49 reedbed 49 billabongs 49 understorey 49 grassland habitats 49 ecoregion 49 biosphere 49 deciduous forests 49 macrofauna 49 riparian woodlands 49 semiarid regions 49 boreal regions 49 calcareous soils 49 biogeographical 49 Zebra mussel 49 karst caves 49 banded morwong 49 molluscan 49 hawksbill turtles 49 Plesiosaurs 49 Laramidia 49 conodonts 49 sulfate minerals 49 faunas 49 lowland rainforests 48 proboscis monkeys 48 Tiritiri Matangi 48 desertlike 48 unicellular algae 48 oligotrophic 48 bacterial mats 48 freshwater springs 48 microscopic single celled 48 hyper saline 48 Subarctic 48 sedge meadow 48 wetland grasses 48 alluvial plain 48 chemosynthetic 48 upland habitats 48 Norris Geyser Basin 48 endangered Irrawaddy dolphins 48 freshwater wetland 48 saxifrage 48 coral ecosystems 48 terrestrial mammals 48 alga 48 Spotted knapweed 48 green alga 48 Somes Sound 48 Festuca 48 prairie warbler 48 orangutan populations 48 endemic flora 48 variable milfoil 48 riparian forests 48 waterweed 48 Antarctic krill 48 sagebrush steppe 48 mantle plumes 48 Hellas Planitia 48 Skunk cabbage 48 mangrove habitats 48 conifer forests 48 Usambara Mountains 48 seacoasts 48 Galapagos Archipelago 48 Gangetic dolphins 48 wetland soils 48 boab 48 kelps 48 Morro Bay estuary 48 mangroves coral reefs 48 sandy loam soils 48 deciduous woodlands 48 warmer wetter 48 ecoregions 48 hardwood swamps 48 fertile soils 48 Arctic charr 48 bull kelp 48 Vernal pools 48 flora 48 freshwater lakes 48 temperate rainforests 48 snail kites 48 upland prairie 48 Paspalum 48 single celled bacteria 48 saltmarsh 48 Snow buntings 48 wildflower blooms 48 Jurassic Period 48 dwelling organisms 48 marsh marigolds 48 migratory songbird 48 invertebrate animals 48 tropics 48 coral habitats 48 PROSSER LAKE 48 reedbeds 48 freshwater aquariums 48 lowland rainforest 48 alkaline soil 48 Pleistocene Age 48 Diporeia 48 Galapagos penguins 48 larval habitats 48 longleaf pine trees 47 Wollemi Pine 47 Lake Yoa 47 manzanitas 47 Namib desert 47 branching corals 47 humid subtropical 47 reproduce prolifically 47 Snake River Plain 47 algal mats 47 nearshore marine 47 green anole 47 shrublands 47 liverwort 47 algal species 47 frogs salamanders 47 Ediacara 47 bristlecones 47 intertidal 47 tropical savanna 47 karst formations 47 riparian corridors 47 subseafloor 47 basaltic rocks 47 cedar swamp 47 fir forests 47 tadpoles frogs 47 tableland 47 Cootes Paradise 47 red berried 47 Macquarie Marshes 47 mosquito Aedes 47 fungus thrives 47 arid regions 47 Quaternary Period 47 tidal estuary 47 peat swamps 47 alkaline soils 47 Microcystis 47 emergent vegetation 47 pine groves 47 bony fishes 47 evaporite deposits 47 auks 47 headwater stream 47 spinifex 47 salt marsh grasses 47 chalk grassland 47 cichlid fishes 47 salamanders frogs 47 rivers estuaries 47 killifish 47 Wollemi pines 47 lush oasis 47 crustaceans molluscs 47 copepod 47 Ninigret Pond 47 Kraken Mare 47 salamander species 47 karst limestone 47 Horseshoe crabs 47 algaes 47 Brackish water 47 staghorn coral 47 nutria ate 47 Cenozoic Era 47 bushy shrub 47 Cheatgrass 47 woodland wildflowers 47 harlequin frog 47 biota 47 puddle ducks 47 ecotypes 47 benthos 47 oak savannah 47 sponges corals 47 freshwater streams 47 molluscs crustaceans 47 abalones 47 gurgling streams 47 Cyanobacteria 47 harlequin frogs 47 ruffe 47 Leatherback Turtle 47 ocean basins 47 lamprey eel 47 Current Warm Period 47 tropic regions 47 towering icebergs 47 salinities 47 grasslands woodlands 47 longleaf pine ecosystem 47 fine grained sediment 47 Devils Hole pupfish 47 salt marsh mosquitoes 47 freshwater estuaries 47 cork oaks 47 cordgrass 47 Mongolian steppes 47 heathland habitat 47 brown trout fishery 47 tunicates 47 fingernail clams 47 intertidal zone 47 forested uplands 47 ghost orchid 47 undeveloped shoreline 47 volcanic ridges 47 thermophiles 47 Didemnum 47 tropical subtropical 47 shortgrass 47 intensively cultivated 47 Cape Floristic Region 47 meadowfoam 47 saline soils 47 Brzuszek 47 forests meadows 47 sediments deposited 47 flowering plants 47 aquatic flora 47 arctic grayling 47 sargassum 47 coralline 47 elkhorn corals 47 bromegrass 47 cyanobacterial blooms 47 shallow weedy 47 woody vines 47 bogs swamps 47 wintering ducks 47 Gambel oak 47 riparian forest 47 karst topography 47 Late Paleozoic 47 Moapa dace 47 Flowering plants 47 arid climates 47 bottomland forest 47 coontie 47 angiosperm 47 Floridian aquifer 47 Nariva Swamp 47 intensively farmed 47 Cambrian Period 47 arid semi arid 47 migrant songbirds 47 lowland heath 47 woodlands wetlands 47 kokanee trout 47 kowhai 47 Giant salvinia 47 mango plantations 47 vertebrate fossils 47 zooplankton species 47 vegetations 47 nitrogen fixers 47 sedimentary layers 47 biodiversity hotspot 47 granite outcroppings 46 Osa Peninsula 46 spider lilies 46 Professor Hoegh Guldberg 46 Miocene Epoch 46 stromatolite 46 symbioses 46 upland habitat 46 Basking shark 46 sparsely vegetated 46 lyme grass 46 Ediacaran 46 dense mats 46 finless porpoises 46 temperate grasslands 46 drier soils 46 Galapagos penguin 46 sandy bays 46 Didymo 46 tropical latitudes 46 gravelly soils 46 Drywood termites 46 deciduous woodland 46 terrestrial ecosystems 46 Poyang Lake 46 LAKE OROVILLE 46 landforms 46 marshes swamps 46 blooming wildflowers 46 Salt marshes 46 broom sedge 46 Aureococcus 46 bottomland forests 46 inlands 46 cabbage palms 46 Seamounts 46 ICE HOUSE RESERVOIR 46 streambanks 46 navigable rivers 46 Semi arid 46 wetlands woodlands 46 comb jelly 46 coralline algae 46 Ice Ages 46 Dr. Pikitch 46 Leatherback turtles 46 Olive Ridley Turtles 46 beaver lodges 46 crabs snails 46 arid Sahel 46 Indo Gangetic plain 46 biodiverse regions 46 evergreen groundcover 46 chalk downland 46 oak groves 46 swampy lowlands 46 fynbos 46 bubbling brooks 46 grassy savannah 46 Peatland 46 lichens mosses 46 mud volcanoes 46 dense rainforests 46 freshwater mollusks 46 Jay Famiglietti 46 waterfalls caves 46 Qinghai Tibetan plateau 46 tidal mudflats 46 Clouded leopards 46 Eocene epoch 46 lush tropical rainforests 46 biodiversity hotspots 46 Scrub jays 46 great crested newt 46 oak hickory forest 46 Biologically speaking 46 subtropical 46 Wilson phalaropes 46 humus rich 46 Sea lampreys 46 forested highlands 46 pickerel weed 46 La Parguera 46 refugium 46 waterbirds 46 lush forested 46 oak savannas 46 midlatitude 46 Chiricahua leopard frogs 46 marine invertebrates 46 sedge meadows 46 Cryogenian 46 barren tundra 46 bumblebee colonies 46 Knotweed 46 nesting herons 46 mixed conifer forests 46 Castlewood Canyon 46 hummocky 46 quadrillion gallons 46 Turkana Basin 46 hydrothermal springs 46 checkerspot butterfly 46 Eld deer 46 cypress swamp 46 driest deserts 46 Antarctic Dry Valleys 46 upwellings 46 Dry Valleys 46 microbial ecosystems 46 Leatherbacks 46 Heavily forested 46 australis 46 hydrothermal venting 46 windblown sand 46 native freshwater mussels 46 lakes 46 garigue 46 buckbrush 46 planktonic 46 bioregions 46 Great blue herons 46 mesic 46 tussock grasslands 46 freshwater crocodiles 46 balds 46 kauri trees 46 clivia 46 Geologically speaking 46 brachiopods 46 inter tidal 46 giant weta 46 called Abydosaurus mcintoshi 46 temperate climes 46 wetlands grasslands 46 mudflat 46 vesper bats 46 sub glacial lakes 46 biospheres 46 Caladiums 46 tannin stained 46 waterlily 46 oak savannahs 46 breeding waders 46 cypress wetlands 46 Titan arum 46 shrimplike 46 Loess Plateau 46 Noachian 46 wintering eagles 46 aquatic insect 46 freshwater marsh 46 warmwater fish 46 gopher frogs 46 brook trout fishery 46 highland forests 46 Sugar maples 46 cirl bunting 46 coral reef habitat 46 nonnative invasive 46 mountain meadows 46 subpolar 46 crustaceans mollusks 46 Kihansi Gorge 46 sphagnum 46 Qaidam Basin 46 spring ephemerals 46 Gizzard shad 46 great crested flycatcher 46 salty soils 46 lush rainforest 46 coral formations 46 pliosaur ferocious predator 46 lobe finned fishes 46 Nierzwicki Bauer 46 bottomland hardwoods 46 pearl mussels 46 headpond 46 pearl oysters 46 sulfur springs 46 foraminifera 46 nesting bald eagle 46 Tawharanui 46 Spartina grass 46 mesa tops 46 moisture retentive 46 treeless tundra 46 Dr Trewin 46 Saltcedar 46 riparian woodland 46 intertidal zones 46 northern leopard frogs 46 midge larvae 46 multicellular creatures 46 forested watersheds 46 landmasses 46 spatterdock 45 mosasaurs 45 subtropical climate 45 Gopher tortoises 45 Earth biosphere 45 coontail 45 golden toad 45 atmospheric deposition 45 Neotropical migrants 45 spawning herring 45 dry deciduous forests 45 Lake Okaro 45 Eisenia 45 birdwatcher paradise 45 mussel populations 45 mangrove ecosystems 45 Patagonian glaciers 45 sea lochs 45 humpback chub 45 Garter snakes 45 salt marsh mosquito 45 unspoilt scenery 45 seashore paspalum 45 blanket bog 45 paspalum 45 savannah sparrows 45 mayflies stoneflies 45 roseus 45 river catchments 45 orange hawkweed 45 habitats 45 Pseudo nitzschia 45 bigleaf hydrangeas 45 talus slopes 45 Nicomekl River 45 humid tropics 45 spawning kokanee 45 dawn redwood 45 C4 grasses 45 Domoic acid neurotoxin 45 longleaf pine forests 45 marginata 45 grassy plains 45 Periodical cicadas 45 terrestrial vertebrates 45 Garry oaks 45 ponds waterfalls 45 Chaohu Lake 45 reed bed 45 Mars Meridiani Planum 45 humans Homo sapiens 45 rotifer 45 mitten crabs 45 Artic Ocean 45 gravelly sandy 45 acid soils 45 Noachian era 45 Kemp Ridleys 45 nonnative trout 45 basalt cliffs 45 neotropical 45 limestone caverns 45 epiphytic 45 climatically suitable 45 coastal marine ecosystems 45 continental rifting 45 Arctic grayling 45 undammed 45 marine sediments 45 Gangetic 45 nomadic hunter gatherers 45 Wular Lake 45 carboniferous 45 damselfish 45 fauna flora 45 bdelloid rotifers 45 carbon isotope ratios 45 planktonic foraminifera 45 River Wandle 45 salmon Delta smelt 45 conifer forest 45 swallowtail butterflies 45 sub tropic 45 Wadden Sea 45 Boreal forests 45 plesiosaurs 45 terminal moraine 45 Seeds germinate 45 Amazonian forest 45 Qilian Mountain 45 comb jellies 45 Gualala River 45 Keoladeo 45 Hotter drier 45 Furnace Pond 45 subaqueous 45 tidal pools 45 Louisiana coastal marshes 45 polar latitudes 45 seabird nesting 45 Gakkel Ridge 45 arctic terns 45 dwarf mistletoe 45 spadefoot toad 45 Maui dolphin 45 checkerspot 45 Ediacaran Period 45 gopher frog 45 Ecoregion 45 Douglas fir forests 45 hotsprings 45 Corkscrew Swamp 45 kelp forests 45 clam beds 45 herbaceous peony 45 peat soils 45 unlogged forests 45 Diatoms 45 pickleweed 45 bioregion 45 micro climates 45 shipworm 45 spotted owls salmon 45 orchids bloom 45 temperate zones 45 subarctic regions 45 Lake Balkhash 45 forams 45 Caretta caretta 45 Great Crested Newts 45 shrubland 45 meandering creek 45 multi celled 45 roseate tern 45 wildflower meadows 45 embayments 45 Tent caterpillars 45 Syrtis Major 45 terra preta 45 freshwater crayfish 45 reed grass 45 coral species 45 Peat bogs 45 deciduous forest 45 Hesperian epoch 45 endangered wood stork 45 limestone karsts 45 broad leaved trees 45 prairie wildflowers 45 nonnative invasive species 45 waterfowls 45 nesting seabirds 45 tidal marshes 45 freshwater impoundments 45 Rhododendrons 45 Burrowing owls 45 Adélie penguins 45 STAMPEDE RESERVOIR 45 Mild winters 45 tidal marsh 45 Chihuahuan desert 45 auklets 45 Neoproterozoic 45 Soay sheep 45 freshwater mussels 45 bottomland hardwood forests 45 giant squid Architeuthis 45 natterjack toads 45 playa lakes 45 ailanthus 45 neotropical songbirds 45 aquatic grasses 45 Gambusia affinis 45 Llyn Padarn 45 NWHI 45 volcanic lava 45 eutrophic 45 pipevine 45 tardigrades 45 Medomak River 45 Shivaliks 45 mussel beds 45 Morne Trois Pitons 45 subtropical regions 45 fringing reef 45 single celled creatures 45 gulf fritillary 45 cedar glades 45 Paleogene 45 aquatic invertebrates 45 Kinabatangan River 45 estuaries 45 coral Acropora 45 pinewoods 45 Pocket gophers 45 spartina grass 45 grassbeds 45 moorlands 45 soils 45 Crassostrea ariakensis 45 biodiverse 45 Earthlike 45 Kilimanjaro glaciers 45 biogeochemical processes 45 clayey 45 Surtsey 45 grasses 45 diatoms 45 phyllosilicates 45 pupfish 45 snail kite 45 fauna 45 steppe mammoth 45 San Bernardino kangaroo rat 45 outcompetes 45 arid deserts 45 Tatshenshini 45 terrestrial vertebrate 45 Sinus Meridiani 45 Tiwanaku civilization 45 lichen moss 45 Iguazu falls 45 penguin rookeries 45 understory vegetation 45 Muskeget 45 FRENCHMAN LAKE 45 glacial geology 44 lowland forests 44 shorebird habitat 44 subglacial lakes 44 arum lily 44 migrated northward 44 photosynthetic microbes 44 wintering birds 44 Norway Svalbard 44 herbaceous perennial 44 yucca plants 44 turtle nesting beaches 44 physiographic 44 coral reefs mangroves 44 marsh fritillary 44 Cottontails seek 44 apple snail 44 cypress forest 44 goldenrods 44 Desert tortoises 44 climatic variability 44 driftless 44 esker 44 creeping urbanization 44 BOCA LAKE 44 freshwater eels 44 Pleistocene Ice Age 44 globe mallow 44 Archaean 44 submerged aquatic vegetation 44 caddisflies 44 backwater lakes 44 Lake Vostok 44 bald cypress trees 44 karsts 44 mammal fossils 44 oceanic islands 44 mosses 44 biologically diverse ecosystems 44 chemosynthesis 44 woodland grassland 44 reed canary grass 44 woody vegetation 44 Kelp forests 44 Kokanee salmon 44 prairie potholes 44 seabird species 44 bushlands 44 Elephant seals 44 foliaged 44 UNION VALLEY RESERVOIR 44 starthistle 44 bloomed profusely 44 Johannes Lehmann 44 Brigham Grette 44 funnel webs 44 silicate rocks 44 cratons 44 blister rust 44 Loch Torridon 44 eskers 44 grevilleas 44 avian species 44 temperate latitudes 44 glacial meltwater 44 Invasive plants 44 drylands 44 Garlic mustard 44 alpine glaciers 44 deepwater corals 44 Tillandsia 44 Burgess Shale 44 marine invertebrate 44 sandy loam soil 44 Namib Desert 44 dogwood blooms 44 lacustrine 44 Toba eruption 44 eelgrass 44 microscopic algae 44 estuarine ecosystems 44 salt tolerant 44 Namakan 44 hellbender 44 fruiting bodies 44 sandy ridges 44 savanna grasslands 44 basalt lava 44 lush tropical rainforest 44 amphipods