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Alphabetical index of categories: E

a b c d E f g h i j k l m n o p q r s t u v w x y z

Number of information resources is shown in parentheses after each term.

early warning systems -> hazard preparedness (67) earth characteristics (415) rare earth elements (5) earth flows -> landslides (28) earth history (5) earth material properties (8) earthquake activity maps (14) -> maps and atlases -> earthquake occurrences earthquake epicenter maps (14) -> maps and atlases -> earthquake occurrences earthquake features (2) earthquake forecasting -> earthquake probabilities (18) earthquake hazards (50) -> earthquakes -> hazards earthquake monitoring -> seismic networking (16) earthquake occurrence maps (14) -> earthquake occurrences -> maps and atlases earthquake occurrences (42) earthquake prediction -> earthquake probabilities (18) earthquake preparedness (23) earthquake probabilities (18) earthquakes (93) earthquake seismology (31) -> seismology -> earthquake occurrences Earth Science Information Centers (ESICs) -> reference services (3) earth sciences (1283) earth structure (13) earth tides (1) echinoderms (2) ecoclines -> ecosystems (264) ecological competition (2) ecological models -> ecological processes (100) long-term ecological monitoring (14) ecological processes (100) ecological research sites (2) ecologic succession -> succession (biological) (1) community ecology (13) ecology (133) insular ecology -> island ecosystems (1) population and community ecology (381) radar ecology (2) -> doppler radar imaging -> population and community ecology economic geology (160) business and economics (11) economics -> business and economics (11) ecoregions -> biogeographic regions (68) ecosystem diversity (3) ecosystem functions (16) estuarine ecosystem functions -> ecosystem functions (16) ecosystem management (26) ecosystem monitoring (62) ecosystem preservation -> ecosystem management (26) aquatic ecosystems (132) arboreal ecosystems -> forest ecosystems (23) benthic ecosystems (3) coastal ecosystems (38) coniferous forests ecosystems -> forest ecosystems (23) coral reef ecosystems -> reef ecosystems (23) deciduous forest ecosystems -> forest ecosystems (23) desert ecosystems (12) ecosystems (264) estuarine ecosystems (27) forest ecosystems (23) freshwater ecosystems (29) grassland ecosystems (16) island ecosystems (1) lake ecosystems -> freshwater ecosystems (29) littoral ecosystems -> coastal ecosystems (38) marine ecosystems (37) marsh ecosystems -> wetland ecosystems (34) marshland ecosystems -> wetland ecosystems (34) mixed forest ecosystems -> forest ecosystems (23) mixed grass ecosystems -> grassland ecosystems (16) plains ecosystems -> grassland ecosystems (16) planktonic ecosystems (4) -> aquatic ecosystems -> plankton pond ecosystems -> freshwater ecosystems (29) prairie ecosystems -> grassland ecosystems (16) rangeland ecosystems -> terrestrial ecosystems (100) reef ecosystems (23) riparian ecosystems -> wetland ecosystems (34) river ecosystems (4) -> river systems -> freshwater ecosystems scrubland ecosystems -> shrubland ecosystems (6) short grass ecosystems -> grassland ecosystems (16) shrubland ecosystems (6) spring ecosystems -> freshwater ecosystems (29) stream ecosystems -> freshwater ecosystems (29) taiga ecosystems -> forest ecosystems (23) tall grass ecosystems -> grassland ecosystems (16) terrestrial ecosystems (100) tundra ecosystems (4) wetland ecosystems (34) ecosystem services (1) ecotones -> ecosystems (264) ecotoxicology (63) ectoprocta -> bryozoans and brachiopods (1) eddies -> hydrographic features (298) shelf edges (ocean) -> continental margins (11) educational services (15) greenhouse effect (2) climate change effects -> effects of climate change (34) climate effects -> effects of climate change (34) effects of climate change (34) effluent -> contamination and pollution (182) electrical resistivity logging (2) electric plants -> power generation sites (1) electromagnetic surveying (11) electron microscopy (3) scanning electron microscopy (2) electron probe microanalysis -> particle-beam spectroscopy (1) electrophoresis (3) toxic trace element contamination (40) chemical element groups (6) chemical elements (56) elements (56) lanthanide series elements (1) rare earth elements (5) elevation and relief -> topography (59) elevation maps -> topographic maps (5) El Nino -> ocean-atmosphere interaction (7) embassy buildings -> buildings (13) embayments -> bays (14) embryology -> developmental biology (2) emergency management resources -> hazards (169) emergency response planning -> hazard preparedness (67) advanced spaceborne thermal emission and reflection radiometer -> multispectral imaging (26) inductively coupled plasma-atomic emission spectrometry -> atomic emission spectroscopy (4) atomic emission spectroscopy (4) employment and volunteer opportunities (13) endangered species (22) endemic species (2) endocrinology (3) population energetics -> population and community ecology (381) wind energy (5) energy resources (144) energy sources -> energy resources (144) genetically engineered organisms (1) hydraulic engineering (9) engineering geology (12) engineering geology maps (2) -> maps and atlases -> engineering geology engineering sciences (24) engineering seismology (4) -> seismology -> engineering sciences search engines -> search services (11) enhanced oil recovery (4) dependent political entities -> political areas (1) independent political entities -> political areas (1) political entities -> political areas (1) semi-independent political entities -> political areas (1) entomology (7) cave entrances -> caves (6) mine entrances -> mine sites (15) environmental analysis -> environmental assessment (46) environmental areas -> reserves (6) environmental assessment (46) environmental chemistry -> biochemistry (11) environmental hazards -> hazards (169) environmental health (human) (29) environmental impact assessment -> environmental assessment (46) environmental management -> natural resource management (273) environmental planning -> natural resource management (273) environmental processes -> ecological processes (100) human environmental safety (12) environmental toxicology -> ecotoxicology (63) eolian sediments -> unconsolidated deposits (20) EOR -> enhanced oil recovery (4) earthquake epicenter maps -> maps and atlases (217) Er -> erbium (5) erbium (5) beach erosion (28) -> erosion -> coastal processes coastal erosion (28) -> coastal processes -> erosion erosion (44) shoreline erosion (28) -> erosion -> coastal processes eruption -> volcanic activity (68) volcanic eruption forecasting -> volcanic eruption prediction (6) volcanic eruption prediction (6) United States Government establishments -> buildings (13) age estimation methods (6) estuaries (18) estuarine ecosystem functions (1) -> ecosystem functions -> estuarine ecosystems estuarine ecosystems (27) estuarine processes (2) estuarine sediment transport (1) -> sediment transport -> estuarine processes Eu -> europium (5) europium (5) eutrophication (6) evaporation (4) salt evaporation ponds -> lakes (36) evapotranspiration (3) -> evaporation -> transpiration evolution (1) exhibition buildings -> buildings (13) exotic species -> nonindigenous species (52) experimental areas -> research areas (3) experimental fields -> research areas (3) field experiments (9) experiment stations -> research facilities (4) exploration -> natural resource exploration (12) natural resource exploration (12) seismic exploration (1) -> seismic methods -> natural resource exploration external research support (4) extinction and extirpation (3) extinction and extirpation (3) extirpation -> extinction and extirpation (3) natural resource extraction (33) resource extraction -> natural resource extraction (33)

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