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Alphabetical index of categories: R

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.

Ra -> radium (1) Interferometric Synthetic Aperture Radar (IFSAR) -> IFSAR (4) radar ecology (2) -> doppler radar imaging -> population and community ecology doppler radar imaging (2) radar imaging (4) radar tomography -> tomography (1) radioactive waste repositories -> waste treatment and disposal (23) radiocarbon dating -> carbon-14 analysis (2) radioisotope tagging -> plant and animal tagging (7) radioisotope tracer study -> tracer study (3) radiolaria -> protists (5) advanced spaceborne thermal emission and reflection radiometer -> multispectral imaging (26) Advanced Very High Resolution Radiometer (AVHRR) -> AVHRR (10) radiometric age determination -> radiometric dating (12) radiometric dating (12) toxic radionuclide contamination (12) radio observatories -> research facilities (4) radio telemetry -> telemetry (13) radium (1) radon (2) acid rain -> acid deposition (6) rain -> precipitation (atmospheric) (33) rainfall -> precipitation (atmospheric) (33) rainfall measurement (10) -> precipitation (atmospheric) -> field inventory and monitoring boat ramps -> hydrographic structures (35) ramps (seafloor) -> seafloor features (15) ranches -> agricultural sites (6) species geographic range -> biogeography (73) rangeland ecosystems -> terrestrial ecosystems (100) ranger stations -> buildings (13) mountain ranges (2) ranges (physiographic) -> mountain ranges (2) LIght Detection and Ranging (LIDAR) -> LIDAR (17) rare earth elements (5) normalized burn ratio (1) -> fire damage -> remote sensing Rb-Sr age analysis -> rubidium-strontium analysis (2) river reaches (9) reaches (hydraulic) -> river reaches (9) reaches (hydrographic) -> channels (4) reaches (streams) -> river reaches (9) polymerase chain reaction (4) reaction transport (1) nuclear reactors -> laboratories (28) real-time data -> real-time monitoring and reporting (174) real-time monitoring and reporting (174) artificial recharge -> water resource management (22) recharge -> water cycle (5) reclaimed water -> water resource management (22) reclamation -> remediation (23) reconnaissance -> field inventory and monitoring (382) audio recordings -> sound recordings (4) sound recordings (4) enhanced oil recovery (4) tertiary oil recovery -> enhanced oil recovery (4) recreation (6) recreational fishery resources (1) recreational fishing -> recreational fishery resources (1) recreation areas -> parks (15) recycling (2) redatafication -> improvement of scientific data usability (1) red tides -> algal blooms (3) coral reef ecosystems -> reef ecosystems (23) reef ecosystems (23) reef fisheries -> marine fishery resources (3) reef fishing -> marine fishery resources (3) barrier reefs -> reefs (15) coral reefs (12) fringing reefs -> reefs (15) reefs (15) laboratory reference materials -> materials standards (3) standard reference samples -> materials standards (3) reference services (3) oil refineries -> industrial sites (3) refineries -> industrial sites (3) sugar refineries -> industrial sites (3) optical reflectance measurement -> optical methods (3) seismic reflection methods (7) advanced spaceborne thermal emission and reflection radiometer -> multispectral imaging (26) seismic reflection survey maps (2) -> seismic reflection methods -> maps and atlases reflectors -> research facilities (4) seismic refraction methods (6) wildlife refuges -> reserves (6) refuse disposal sites -> disposal sites (2) regional offices (1) agricultural regions (2) arid regions -> deserts (10) biogeographic regions (68) boundary regions -> administrative areas (8) lake regions -> land regions (13) land regions (13) map quadrangle regions (2) map regions (2) marine regions -> ocean regions (6) ocean regions (6) quadrangle regions -> map quadrangle regions (2) regions (147) rice growing regions -> agricultural regions (2) topographic quadrangle regions -> map quadrangle regions (2) regression analysis (1) laws and regulations (2) policies and regulations (7) regulations -> policies and regulations (7) rehabilitation centers -> medical facilities (2) reintroduction (organisms) -> ecosystem management (26) community relations (1) media relations (3) trophic relationships -> food web (3) news releases (11) press releases -> news releases (11) elevation and relief -> topography (59) natural remanent magnetism -> remanent magnetism (1) remanent magnetism (1) natural remanent magnetization analysis (1) biological remediation -> bioremediation (4) remediation (23) natural remnant magnetization analysis -> natural remanent magnetization analysis (1) remote-sensing data (28) -> remote sensing -> image collections remote-sensing images (28) -> remote sensing -> image collections remote sensing (117) remote video monitoring -> video monitoring (6) real-time monitoring and reporting (174) planning reports -> reports (106) reports (106) scientific reports -> reports (106) technical reports -> reports (106) workshop reports -> reports (106) core repositories -> sample repositories (1) nuclear waste repositories -> waste treatment and disposal (23) radioactive waste repositories -> waste treatment and disposal (23) sample repositories (1) waste repositories -> waste treatment and disposal (23) reptiles (16) data rescue (2) public participation in scientific research -> citizen science programs (2) research areas (3) scientific research bases -> research facilities (4) research facilities (4) research grants -> external research support (4) research institutes -> research facilities (4) contract research programs -> external research support (4) ecological research sites (2) external research support (4) reservations (nature sites) -> reserves (6) agricultural reserves -> agricultural sites (6) forest reserves -> reserves (6) hunting reserves -> reserves (6) nature reserves -> reserves (6) palm tree reserves -> reserves (6) reserves (6) wildlife reserves -> reserves (6) covered reservoirs -> reservoirs (14) intermittent reservoirs -> reservoirs (14) reservoirs (14) residential water use -> domestic water use (9) resistivity (3) electrical resistivity logging (2) resistivity sounding -> electrical resistivity logging (2) conflict resolution methods -> decision support methods (12) Advanced Very High Resolution Radiometer (AVHRR) -> AVHRR (10) nuclear magnetic resonance spectroscopy -> chemical analysis (60) natural resource assessment (114) resource assessment -> natural resource assessment (114) resource conservation -> natural resource management (273) natural resource exploration (12) natural resource extraction (33) resource extraction -> natural resource extraction (33) natural resource management (273) water resource management (22) resource restoration -> natural resource management (273) anthracite resources -> coal resources (15) bituminous coal resources -> coal resources (15) building stone resources (4) coalbed methane resources (11) coal bed methane resources -> coalbed methane resources (11) coal resources (15) college resources (1) emergency management resources -> hazards (169) energy resources (144) fishery resources (22) forest resources (2) gas hydrate resources (8) gem resources (5) geothermal resources (10) industrial mineral resources -> nonmetallic mineral resources (16) inland fishery resources (5) K-12 resources (10) lifelong learning resources (5) lignite resources -> coal resources (15) marine fishery resources (3) metallic mineral resources (25) methane hydrate resources -> gas hydrate resources (8) mineral resources (66) natural gas resources (96) natural resources (624) nonmetallic mineral resources (16) oil resources (90) oil shale resources (7) recreational fishery resources (1) soil resources (7) subbituminous coal resources -> coal resources (15) water resources (383) methane resources (coalbed) -> coalbed methane resources (11) petroleum resources (gas) -> natural gas resources (96) petroleum resources (oil) -> oil resources (90) emergency response planning -> hazard preparedness (67) rest areas -> parks (15) restaurants -> buildings (13) resthouses -> transportation features (4) resource restoration -> natural resource management (273) restoration -> remediation (23) shoreline retreat (28) -> erosion -> coastal processes revegetation -> bioremediation (4) reverse faults -> faults (17) rheology -> deformation (geologic) (10) rice fields -> agricultural sites (6) rice growing regions -> agricultural regions (2) age dating (tree ring) -> tree ring analysis (1) tree ring analysis (1) rios -> rivers (47) riparian areas -> wetlands (39) riparian ecosystems -> wetland ecosystems (34) sea-level rise -> sea-level change (11) continental rises -> continental margins (11) risk assessment (51) river bends -> bends (river) (1) river discharge -> stream discharge (17) river discharge monitoring -> field inventory and monitoring (382) river ecosystems (4) -> river systems -> freshwater ecosystems river reaches (9) lost rivers -> streams (96) rivers (47) river systems (34) Rn -> radon (2) road bends -> roadways (2) road cuts -> roadways (2) road junctions -> roadways (2) roadless areas -> reserves (6) roads -> roadways (2) roadsteads (anchorages) -> harbors (4) roadways (2) rock composition -> rocks and deposits (157) rock deserts -> deserts (10) rockfalls -> physiographic features (237) rockfalls -> landslides (28) rock mechanics maps (2) -> maps and atlases -> engineering geology igneous rocks (10) intrusive rocks -> Plutonic rocks (1) metamorphic rocks (2) Plutonic rocks (1) sedimentary rocks (14) volcanic rocks (6) rocks and deposits (157) rookeries -> habitats (2) air routes -> transportation features (4) caravan routes -> transportation features (4) routes -> transportation features (4) stock routes -> transportation features (4) rubber plantations -> agricultural sites (6) rubidium-strontium analysis (2) runoff (16) stormwater runoff -> runoff (16) urban runoff -> runoff (16) rural water use -> agricultural water use (10)

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