7.4K(top 0.1%)
papers
441.1K(top 0.1%)
citations
273(top 0.1%)
h-index
465(top 0.1%)
g-index
9.4K
all documents
515.0K
doc citations
11.2K
citing journals
Top Disciplines (by citations)
| # | Discipline | Articles | Citations | R ARank | R CRank |
|---|---|---|---|---|---|
| 1 | Ecology | 1,004 | 81,125 | 107 | 73 |
| 2 | Biology | 394 | 68,788 | 867 | 413 |
| 3 | Pollution | 701 | 55,630 | 86 | 42 |
| 4 | Science | 301 | 51,605 | 1.1K | 569 |
| 5 | Physics | 140 | 39,228 | 1.9K | 752 |
| 6 | Environment | 343 | 35,564 | 173 | 98 |
| 7 | Biodiversity conservation | 276 | 31,214 | 28 | 8 |
| 8 | Natural history | 84 | 28,351 | 726 | 523 |
| 9 | Climate change | 189 | 26,148 | 14 | 10 |
| 9 | Eutrophication | 189 | 26,148 | 14 | 10 |
| 11 | environmental pollution | 367 | 19,357 | 89 | 56 |
| 12 | Environmental Health | 275 | 18,748 | 281 | 191 |
| 13 | Agricultural Ecology | 172 | 17,699 | 31 | 7 |
| 14 | Agriculture | 171 | 16,435 | 100 | 15 |
| 15 | Environmental Engineering | 176 | 15,155 | 223 | 129 |
| 16 | Meteorology | 188 | 14,804 | 194 | 115 |
| 17 | Hydrology | 237 | 13,885 | 81 | 49 |
| 18 | Geophysics | 177 | 13,625 | 489 | 259 |
| 19 | Chemistry | 78 | 12,331 | 2.9K | 1.2K |
| 20 | Biodiversity | 221 | 11,360 | 45 | 40 |
| 21 | Earth Sciences | 91 | 10,834 | 357 | 79 |
| 22 | Atmospheric Physics | 143 | 10,717 | 173 | 112 |
| 23 | Atmospheric Chemistry | 123 | 10,312 | 121 | 90 |
| 24 | Microbiology | 94 | 10,012 | 1.6K | 834 |
| 25 | Microbial Ecology | 94 | 9,516 | 286 | 186 |
| 26 | sanitation | 116 | 9,271 | 156 | 146 |
| 27 | Climatology | 75 | 9,095 | 287 | 129 |
| 28 | Botany | 114 | 8,732 | 654 | 418 |
| 29 | environmental protection | 78 | 8,490 | 338 | 97 |
| 30 | Biogeochemistry | 155 | 8,466 | 19 | 36 |
| 31 | Evolution | 82 | 8,156 | 252 | 159 |
| 32 | Plant Ecology | 136 | 7,753 | 69 | 60 |
| 33 | Environmental Policy | 108 | 7,123 | 161 | 118 |
| 34 | freshwater biology | 87 | 6,882 | 26 | 11 |
| 35 | ecosystem | 108 | 6,765 | 39 | 38 |
| 36 | Environmental pollutants | 158 | 6,756 | 46 | 38 |
| 37 | pollutants | 155 | 6,742 | 34 | 32 |
| 38 | Environmental monitoring | 113 | 6,519 | 258 | 164 |
| 39 | Water | 83 | 6,314 | 206 | 150 |
| 40 | Toxicology | 119 | 6,155 | 615 | 392 |
| 41 | Research | 125 | 6,077 | 1.8K | 1.3K |
| 42 | Medicine | 122 | 6,058 | 2.4K | 2.0K |
| 43 | Animal ecology | 86 | 5,968 | 114 | 51 |
| 44 | Zoology | 86 | 5,875 | 327 | 81 |
| 45 | Marine Biology | 114 | 5,811 | 283 | 151 |
| 46 | Environmental Chemistry | 102 | 5,287 | 131 | 201 |
| 47 | Birds | 138 | 4,670 | 65 | 41 |
| 48 | biological evolution | 34 | 4,597 | 603 | 310 |
| 49 | Biogeography | 58 | 4,574 | 101 | 69 |
| 50 | Biotechnology | 37 | 4,374 | 2.3K | 1.1K |
| 51 | Water pollution | 59 | 4,296 | 364 | 200 |
| 52 | Molecular Biology | 67 | 4,214 | 2.5K | 2.0K |
| 53 | Environmental Microbiology | 35 | 4,131 | 260 | 118 |
| 54 | Technology | 54 | 4,062 | 801 | 308 |
| 55 | Ornithology | 121 | 4,014 | 51 | 26 |
| 56 | Environmental Law | 32 | 3,817 | 153 | 67 |
| 57 | atmospheric models | 50 | 3,709 | 131 | 83 |
| 58 | water supply | 53 | 3,692 | 172 | 110 |
| 59 | Entomology | 84 | 3,539 | 349 | 160 |
| 60 | Environmental Management | 101 | 3,479 | 108 | 180 |
| 61 | Planets | 41 | 3,364 | 588 | 374 |
| 62 | Molecular Genetics | 44 | 3,098 | 422 | 290 |
| 63 | Aquatic ecology | 49 | 3,006 | 87 | 15 |
| 64 | soil microbiology | 51 | 2,866 | 163 | 166 |
| 65 | plant communities | 63 | 2,850 | 123 | 161 |
| 66 | Hydrometeorology | 15 | 2,796 | 64 | 21 |
| 67 | bioclimatology | 25 | 2,751 | 133 | 17 |
| 68 | Virology | 40 | 2,749 | 1.1K | 1.2K |
| 69 | Biochemical Engineering | 9 | 2,631 | 1.6K | 686 |
| 70 | Ecosystem management | 36 | 2,436 | 64 | 47 |
| 71 | Bioengineering | 11 | 2,358 | 2.8K | 1.2K |
| 72 | Wildlife conservation | 48 | 2,312 | 61 | 35 |
| 73 | Molecular ecology | 34 | 2,192 | 292 | 276 |
| 74 | Population Genetics | 35 | 2,078 | 316 | 276 |
| 75 | Soil Science | 50 | 2,034 | 241 | 197 |
| 76 | Biogeochemical cycles | 22 | 2,012 | 141 | 119 |
| 77 | Radiation | 15 | 1,935 | 788 | 118 |
| 78 | Parasitology | 36 | 1,911 | 682 | 321 |
| 79 | Biochemistry | 33 | 1,822 | 4.0K | 2.9K |
| 80 | Plant diseases | 40 | 1,767 | 527 | 317 |
| 81 | Parasitic Diseases | 31 | 1,758 | 578 | 349 |
| 82 | Environmental Toxicology | 30 | 1,756 | 618 | 479 |
| 83 | Geography | 41 | 1,708 | 531 | 356 |
| 84 | Genomics | 31 | 1,681 | 1.1K | 780 |
| 85 | global environmental change | 45 | 1,672 | 54 | 93 |
| 86 | Insects | 33 | 1,570 | 309 | 153 |
| 87 | Data Mining | 18 | 1,343 | 459 | 243 |
| 88 | data collection | 17 | 1,339 | 259 | 149 |
| 89 | biological invasions | 28 | 1,335 | 74 | 52 |
| 90 | rivers | 16 | 1,285 | 61 | 16 |
| 91 | Sustainable Development | 30 | 1,245 | 296 | 290 |
| 92 | Fisheries | 22 | 1,211 | 465 | 233 |
| 93 | gene mapping | 18 | 1,199 | 885 | 664 |
| 94 | Marine Pollution | 5 | 1,157 | 810 | 157 |
| 95 | Soil biology | 18 | 1,139 | 135 | 116 |
| 96 | soil management | 25 | 1,095 | 29 | 23 |
| 97 | Virulence | 4 | 1,057 | 1.3K | 593 |
| 98 | Plant physiology | 18 | 1,018 | 921 | 817 |
| 99 | biological monitoring | 37 | 997 | 29 | 48 |
| 100 | Oceanography | 24 | 996 | 640 | 506 |
| 101 | Infections | 3 | 972 | 1.5K | 447 |
| 101 | infection | 3 | 972 | 2.1K | 564 |
| 103 | Nanotechnology | 25 | 969 | 2.3K | 2.2K |
| 104 | sustainability | 19 | 952 | 157 | 164 |
| 105 | Landscape Ecology | 31 | 945 | 53 | 97 |
| 106 | Engineering | 20 | 913 | 1.7K | 772 |
| 107 | Mathematics | 20 | 897 | 3.1K | 1.2K |
| 108 | weather | 12 | 885 | 139 | 42 |
| 109 | Climate | 11 | 884 | 177 | 52 |
| 110 | Conservation Biology | 22 | 877 | 299 | 359 |
| 111 | Endocrinology | 20 | 871 | 1.7K | 1.7K |
| 112 | Immunology | 11 | 844 | 2.8K | 2.1K |
| 113 | irrigation | 32 | 838 | 38 | 33 |
| 114 | environmental indicators | 18 | 832 | 45 | 51 |
| 115 | geological modeling | 8 | 817 | 259 | 107 |
| 116 | Geochemical Modeling | 7 | 810 | 200 | 105 |
| 117 | Plant cells | 10 | 782 | 785 | 854 |
| 118 | Flood control | 34 | 775 | 12 | 9 |
| 119 | Animal Behavior | 16 | 759 | 772 | 712 |
| 120 | Physical Geography | 12 | 724 | 201 | 65 |
| 121 | drainage | 29 | 715 | 32 | 20 |
| 122 | Sustainable agriculture | 29 | 714 | 86 | 115 |
| 123 | Plants | 30 | 690 | 707 | 1.0K |
| 124 | Computational Biology | 11 | 669 | 2.0K | 1.3K |
| 124 | herbicides | 3 | 669 | 433 | 98 |
| 126 | Scandinavia | 33 | 668 | 94 | 126 |
| 127 | Genetic engineering | 7 | 645 | 1.7K | 1.0K |
| 127 | environmental exposure | 13 | 645 | 879 | 570 |
| 129 | Industrial Microbiology | 7 | 629 | 1.5K | 883 |
| 130 | Water quality management | 15 | 603 | 851 | 479 |
| 131 | Epidemiology | 12 | 596 | 2.6K | 1.9K |
| 132 | Radiation Protection | 47 | 576 | 44 | 39 |
| 133 | Chemical Ecology | 11 | 564 | 270 | 200 |
| 133 | Economic Development | 7 | 564 | 994 | 482 |
| 133 | Parasites | 16 | 564 | 612 | 442 |
| 136 | transgenic organisms | 9 | 559 | 90 | 56 |
| 137 | Hydraulic Engineering | 24 | 550 | 188 | 148 |
| 138 | pheromones | 10 | 534 | 267 | 197 |
| 139 | Geology | 22 | 513 | 1.3K | 1.2K |
| 140 | Ecohydrology | 18 | 477 | 38 | 48 |
| 141 | Waste management | 18 | 456 | 491 | 397 |
| 142 | Plant genetic engineering | 7 | 452 | 687 | 519 |
| 143 | transgenic animals | 6 | 451 | 148 | 68 |
| 143 | Transgenic plants | 6 | 451 | 353 | 191 |
| 145 | environmental issues | 17 | 447 | 75 | 100 |
| 146 | Medical Microbiology | 4 | 445 | 2.7K | 1.7K |
| 147 | natural disasters | 12 | 444 | 534 | 468 |
| 148 | Genetics | 16 | 436 | 2.3K | 3.1K |
| 149 | Psychophysiology | 4 | 434 | 2.9K | 1.8K |
| 150 | Diagnostic microbiology | 3 | 432 | 1.8K | 1.2K |
| 151 | Wetland ecology | 8 | 422 | 210 | 120 |
| 152 | Soil ecology | 9 | 413 | 243 | 220 |
| 153 | nucleic acids | 4 | 406 | 2.1K | 1.6K |
| 154 | Systems Biology | 9 | 404 | 1.1K | 646 |
| 155 | emergency management | 9 | 385 | 428 | 192 |
| 156 | Bioinformatics | 4 | 381 | 2.6K | 1.4K |
| 157 | United States | 11 | 373 | 3.7K | 2.7K |
| 158 | Human genetics | 1 | 372 | 4.2K | 3.2K |
| 159 | mammals | 9 | 365 | 654 | 437 |
| 160 | Immunity | 3 | 361 | 2.6K | 2.1K |
| 161 | human behavior | 3 | 357 | 2.6K | 1.5K |
| 161 | Behavior | 3 | 357 | 3.7K | 2.0K |
| 161 | sexual behavior | 3 | 357 | 694 | 237 |
| 164 | viruses | 3 | 352 | 2.0K | 1.3K |
| 165 | polar regions | 16 | 349 | 247 | 277 |
| 166 | Ethology | 9 | 343 | 778 | 953 |
| 167 | Geomorphology | 9 | 339 | 505 | 458 |
| 167 | disease vectors | 10 | 339 | 559 | 458 |
| 169 | Geochemistry | 7 | 336 | 1.1K | 736 |
| 170 | Agricultural Chemistry | 2 | 329 | 3.5K | 1.6K |
| 170 | plant molecular biology | 6 | 329 | 1.3K | 1.3K |
| 172 | Wetland conservation | 5 | 327 | 227 | 120 |
| 172 | Wetlands | 5 | 327 | 232 | 120 |
| 174 | Environmental risk assessment | 12 | 326 | 111 | 108 |
| 175 | Geobiology | 15 | 325 | 174 | 215 |
| 176 | radiation monitoring | 13 | 304 | 220 | 99 |
| 177 | environmental control | 9 | 297 | 98 | 89 |
| 178 | Molecular evolution | 6 | 292 | 1.2K | 1.1K |
| 179 | Public Health | 10 | 289 | 4.4K | 4.1K |
| 180 | Coastal zone management | 8 | 284 | 172 | 102 |
| 181 | reforestation | 4 | 283 | 119 | 47 |
| 181 | afforestation | 4 | 283 | 119 | 47 |
| 183 | Invertebrates | 9 | 281 | 191 | 157 |
| 184 | Chemical Engineering | 6 | 280 | 3.4K | 2.7K |
| 185 | Water Purification | 6 | 276 | 968 | 518 |
| 186 | atmosphere | 10 | 275 | 191 | 172 |
| 187 | Health Physics | 11 | 274 | 35 | 24 |
| 188 | Microorganisms | 3 | 270 | 1.6K | 1.1K |
| 189 | Aquaculture | 9 | 266 | 649 | 457 |
| 190 | Social behavior | 6 | 263 | 896 | 765 |
| 191 | Sedimentology | 2 | 253 | 1.0K | 436 |
| 192 | soil conservation | 7 | 252 | 506 | 408 |
| 193 | Energy Policy | 4 | 251 | 1.6K | 1.1K |
| 194 | Water chemistry | 4 | 248 | 269 | 78 |
| 195 | Fishery management | 8 | 247 | 419 | 255 |
| 196 | energy resources | 2 | 246 | 964 | 626 |
| 197 | Agricultural Economics | 4 | 239 | 94 | 38 |
| 197 | Host-parasite interactions | 2 | 239 | 1.8K | 1.5K |
| 199 | Algae | 10 | 237 | 485 | 567 |
| 200 | Climate Change Mitigation | 2 | 233 | 67 | 67 |
| 200 | Global warming | 2 | 233 | 70 | 67 |
| 200 | sea level | 2 | 233 | 67 | 67 |
| 203 | Forest genetics | 15 | 223 | 84 | 110 |
| 204 | Marine Ecology | 10 | 218 | 353 | 346 |
| 205 | Land use | 8 | 214 | 515 | 529 |
| 206 | Pharmacology | 6 | 204 | 4.9K | 4.4K |
| 207 | Fluid Mechanics | 12 | 196 | 1.2K | 1.2K |
| 208 | River Engineering | 11 | 194 | 18 | 14 |
| 209 | Phylogeny | 3 | 186 | 1.0K | 670 |
| 210 | Mass Spectrometry | 7 | 184 | 1.1K | 1.0K |
| 211 | Seaweed | 5 | 182 | 569 | 553 |
| 212 | Hydrogeology | 4 | 179 | 691 | 374 |
| 213 | Chromosome mapping | 3 | 178 | 2.4K | 1.9K |
| 214 | Biophysics | 7 | 176 | 5.1K | 4.8K |
| 215 | Ecological Genetics | 8 | 174 | 374 | 318 |
| 216 | Bioremediation | 5 | 165 | 378 | 362 |
| 216 | Protozoa | 7 | 165 | 238 | 310 |
| 218 | Soil fertility | 5 | 161 | 281 | 374 |
| 219 | DNA | 5 | 160 | 501 | 369 |
| 220 | Emerging infectious diseases | 1 | 158 | 826 | 253 |
| 220 | California | 2 | 158 | 662 | 307 |
| 222 | Spectrum analysis | 1 | 155 | 6.2K | 3.2K |
| 223 | Restoration Ecology | 11 | 154 | 174 | 350 |
| 224 | international cooperation | 1 | 149 | 1.4K | 483 |
| 225 | land degradation | 4 | 148 | 454 | 390 |
| 225 | degradation | 4 | 148 | 454 | 390 |
| 227 | Population | 2 | 146 | 1.4K | 627 |
| 228 | Cell Biology | 2 | 133 | 5.9K | 5.0K |
| 229 | Genetic markers | 3 | 132 | 323 | 173 |
| 229 | biochemical markers | 3 | 132 | 1.1K | 636 |
| 231 | Ichthyology | 1 | 131 | 1.1K | 237 |
| 231 | Fish | 1 | 131 | 841 | 192 |
| 233 | radiocarbon dating | 4 | 126 | 355 | 257 |
| 234 | Food additives | 3 | 125 | 1.2K | 927 |
| 235 | Immunotherapy | 1 | 122 | 3.6K | 2.3K |
| 235 | Immune system | 1 | 122 | 2.3K | 1.7K |
| 237 | Architecture | 1 | 121 | 1.4K | 267 |
| 237 | construction | 1 | 121 | 216 | 112 |
| 239 | Microelectronics | 1 | 119 | 3.0K | 1.9K |
| 239 | miniaturization | 1 | 119 | 3.6K | 2.3K |
| 241 | soil pollution | 4 | 115 | 509 | 427 |
| 241 | Groundwater | 3 | 115 | 897 | 607 |
| 243 | Cytology | 3 | 113 | 5.2K | 5.2K |
| 244 | Analytical Chemistry | 4 | 110 | 4.8K | 4.5K |
| 245 | Metallurgy | 4 | 108 | 2.3K | 1.7K |
| 245 | air quality management | 3 | 108 | 428 | 425 |
| 245 | Electrochemistry | 4 | 108 | 3.4K | 2.8K |
| 245 | Aerosols | 1 | 108 | 789 | 347 |
| 245 | Genetically modified organisms | 3 | 108 | 16 | 19 |
| 245 | safety | 3 | 108 | 81 | 45 |
| 251 | Agricultural Science | 4 | 103 | 66 | 119 |
| 251 | Agronomy | 4 | 103 | 573 | 679 |
| 253 | Molecular structure | 1 | 100 | 3.9K | 2.2K |
| 254 | proteins | 4 | 99 | 2.5K | 2.5K |
| 255 | Plant breeding | 6 | 98 | 736 | 987 |
| 255 | Chemical industry | 2 | 98 | 2.0K | 1.0K |
| 255 | Australia | 3 | 98 | 2.4K | 1.6K |
| 258 | Natural resources | 3 | 96 | 732 | 676 |
| 258 | Hydrodynamics | 3 | 96 | 423 | 333 |
| 258 | animals | 4 | 96 | 1.6K | 1.2K |
| 261 | wetland management | 3 | 95 | 171 | 177 |
| 261 | Thorax | 1 | 95 | 1.1K | 702 |
| 263 | bees | 1 | 94 | 799 | 353 |
| 264 | Wildlife management | 6 | 93 | 380 | 430 |
| 265 | Engineering Geology | 3 | 92 | 1.4K | 1.2K |
| 265 | Zoonoses | 2 | 92 | 509 | 388 |
| 267 | food contamination | 2 | 88 | 1.6K | 906 |
| 268 | Agroforestry | 3 | 87 | 48 | 26 |
| 269 | Luminescence | 1 | 85 | 1.5K | 526 |
| 269 | bioluminescence | 1 | 85 | 849 | 196 |
| 269 | Scotland | 16 | 85 | 33 | 63 |
| 272 | Green Chemistry | 1 | 84 | 3.0K | 2.4K |
| 273 | Ecological Engineering | 5 | 83 | 165 | 370 |
| 274 | Nanostructured Materials | 2 | 80 | 4.3K | 3.6K |
| 274 | Nanoparticles | 2 | 80 | 2.7K | 2.3K |
| 274 | Radioisotopes | 3 | 80 | 1.2K | 794 |
| 277 | Nanostructures | 2 | 79 | 3.0K | 2.5K |
| 278 | Remote Sensing | 2 | 78 | 1.4K | 884 |
| 279 | Neurology | 1 | 77 | 8.9K | 6.8K |
| 279 | Neuroendocrinology | 1 | 77 | 247 | 284 |
| 281 | Biomass Energy | 4 | 76 | 2.1K | 2.8K |
| 281 | indoor air pollution | 1 | 76 | 943 | 550 |
| 281 | Ventilation | 1 | 76 | 1.2K | 628 |
| 281 | Sick building syndrome | 1 | 76 | 943 | 550 |
| 285 | Microbiota | 1 | 75 | 147 | 18 |
| 285 | nanoscience | 2 | 75 | 4.0K | 3.8K |
| 287 | sustainable growth | 2 | 74 | 51 | 64 |
| 288 | Geographic information systems | 2 | 73 | 1.6K | 941 |
| 288 | United Kingdom | 1 | 73 | 3.3K | 2.3K |
| 290 | Regional Planning | 2 | 70 | 2.1K | 1.5K |
| 291 | Risk Management | 6 | 67 | 526 | 930 |
| 291 | Flood forecasting | 6 | 67 | 31 | 135 |
| 293 | Pesticide residues | 1 | 66 | 196 | 164 |
| 294 | Forest Ecology | 4 | 60 | 606 | 820 |
| 295 | Cosmochemistry | 2 | 54 | 669 | 568 |
| 295 | Reproduction | 1 | 54 | 4.3K | 3.3K |
| 297 | Biodegradation | 1 | 52 | 1.1K | 859 |
| 298 | Social Sciences | 2 | 50 | 5.5K | 3.5K |
| 298 | Humanities | 2 | 50 | 2.8K | 1.3K |
| 298 | Forest Management | 4 | 50 | 484 | 689 |
| 301 | Proteome | 1 | 49 | 2.4K | 2.4K |
| 302 | Bryology | 6 | 48 | 116 | 153 |
| 302 | Public Administration | 1 | 48 | 2.7K | 1.4K |
| 302 | Chemical analysis | 1 | 48 | 2.4K | 1.9K |
| 302 | bryophytes | 6 | 48 | 41 | 48 |
| 306 | cell physiology | 1 | 47 | 3.0K | 3.0K |
| 307 | Civil Engineering | 1 | 46 | 3.2K | 1.5K |
| 307 | Land Use Planning | 1 | 46 | 715 | 635 |
| 309 | hazard mitigation | 2 | 44 | 1.3K | 1.4K |
| 310 | Cartography | 1 | 43 | 1.0K | 458 |
| 310 | Geodesy | 1 | 43 | 1.2K | 750 |
| 312 | Environmental hydraulics | 2 | 41 | 25 | 12 |
| 312 | Biomass | 1 | 41 | 444 | 495 |
| 314 | Physiology | 1 | 39 | 7.1K | 6.5K |
| 314 | Comparative Physiology | 1 | 39 | 1.3K | 1.2K |
| 314 | investigative techniques | 1 | 39 | 322 | 307 |
| 314 | Meteorites | 2 | 39 | 734 | 932 |
| 318 | Metabolism | 1 | 37 | 5.1K | 5.1K |
| 319 | China | 5 | 36 | 2.6K | 3.8K |
| 320 | Biometrics | 2 | 35 | 1.7K | 1.7K |
| 320 | Developing countries | 1 | 35 | 3.8K | 3.0K |
| 322 | Environmental Economics | 1 | 33 | 886 | 677 |
| 323 | Paleontology | 3 | 32 | 1.6K | 1.9K |
| 323 | occupational diseases | 2 | 32 | 1.7K | 2.0K |
| 323 | Watershed management | 2 | 32 | 331 | 290 |
| 326 | Horticulture | 1 | 31 | 1.6K | 1.2K |
| 326 | Plant Morphology | 2 | 31 | 695 | 860 |
| 326 | Plant Biotechnology | 1 | 31 | 1.6K | 1.5K |
| 326 | plankton | 1 | 31 | 463 | 473 |
| 330 | Radiation dosimetry | 2 | 30 | 825 | 631 |
| 331 | Psychiatry | 1 | 28 | 8.1K | 7.5K |
| 331 | Health equity | 1 | 28 | 157 | 78 |
| 331 | urban health | 1 | 28 | 656 | 718 |
| 334 | Aquatic ecosystems | 2 | 27 | 261 | 296 |
| 335 | Plant Pathology | 1 | 26 | 382 | 301 |
| 335 | Herpetology | 1 | 26 | 695 | 419 |
| 335 | city planning | 2 | 26 | 2.0K | 2.2K |
| 335 | Amphibians | 1 | 26 | 642 | 288 |
| 335 | Reptiles | 1 | 26 | 697 | 383 |
| 340 | Molecular cloning | 1 | 24 | 2.5K | 2.6K |
| 340 | Genetic recombination | 1 | 24 | 2.5K | 2.5K |
| 340 | Tropical Medicine | 1 | 24 | 3.6K | 3.4K |
| 340 | Recombinant DNA | 1 | 24 | 2.7K | 2.8K |
| 344 | landscapes | 2 | 23 | 262 | 386 |
| 344 | Breeding | 1 | 23 | 2.4K | 2.4K |
| 346 | Psychology | 1 | 22 | 9.2K | 8.4K |
| 346 | Environmental Psychology | 1 | 22 | 427 | 512 |
| 346 | Bioacoustics | 1 | 22 | 235 | 199 |
| 346 | System analysis | 2 | 22 | 3.3K | 3.8K |
| 346 | Japan | 3 | 22 | 2.6K | 3.2K |
| 346 | Maps | 2 | 22 | 248 | 312 |
| 352 | Physical Chemistry | 1 | 21 | 4.2K | 4.1K |
| 352 | Solutions | 1 | 21 | 817 | 695 |
| 354 | Quality Control | 2 | 20 | 2.4K | 3.1K |
| 354 | Arthropods | 1 | 20 | 610 | 552 |
| 354 | fishing industry | 1 | 20 | 444 | 427 |
| 357 | Radiation effects | 1 | 19 | 564 | 779 |
| 358 | Synthetic biology | 1 | 18 | 736 | 831 |
| 359 | Food Safety | 1 | 17 | 685 | 669 |
| 359 | Water Microbiology | 1 | 17 | 1.2K | 1.4K |
| 359 | Enzyme | 1 | 17 | 577 | 843 |
| 359 | water reuse | 1 | 17 | 697 | 792 |
| 359 | weather forecasting | 1 | 17 | 402 | 550 |
| 359 | enzymes | 1 | 17 | 2.5K | 2.9K |
| 359 | Europe | 1 | 17 | 6.5K | 5.6K |
| 366 | Radiology | 1 | 16 | 2.8K | 2.7K |
| 366 | Global Health | 2 | 16 | 1.8K | 2.4K |
| 366 | health services accessibility | 2 | 16 | 1.4K | 1.9K |
| 366 | Radiobiology | 1 | 16 | 3.2K | 3.1K |
| 366 | Phylogenetics | 1 | 16 | 257 | 286 |
| 366 | Reservoirs | 2 | 16 | 315 | 475 |
| 366 | lakes | 2 | 16 | 122 | 240 |
| 373 | Robotics | 1 | 15 | 2.9K | 2.9K |
| 373 | Epigenetics | 1 | 15 | 521 | 658 |
| 373 | Epigenomics | 1 | 15 | 509 | 642 |
| 373 | plant viruses | 1 | 15 | 497 | 642 |
| 373 | Marine mammals | 1 | 15 | 594 | 721 |
| 378 | Glaciology | 1 | 14 | 614 | 699 |
| 378 | Biological Systems | 1 | 14 | 1.7K | 2.0K |
| 378 | preventive medicine | 2 | 14 | 2.0K | 3.1K |
| 378 | Travel | 2 | 14 | 1.4K | 2.1K |
| 378 | Raman spectroscopy | 1 | 14 | 1.4K | 1.8K |
| 378 | Microbial Metabolism | 1 | 14 | 492 | 837 |
| 378 | Environmental forensics | 1 | 14 | 201 | 254 |
| 378 | aquatic insects | 1 | 14 | 216 | 155 |
| 378 | glaciers | 1 | 14 | 584 | 679 |
| 378 | Structure-activity relationship | 1 | 14 | 1.1K | 1.0K |
| 388 | Surface Chemistry | 1 | 13 | 5.1K | 5.8K |
| 388 | Animal genetics | 1 | 13 | 1.0K | 1.3K |
| 388 | Colloids | 1 | 13 | 5.1K | 6.1K |
| 388 | DNA polymerases | 1 | 13 | 1.0K | 1.7K |
| 392 | cryosphere | 1 | 12 | 683 | 847 |
| 392 | Isotopes | 2 | 12 | 179 | 418 |
| 394 | Environmental Ethics | 1 | 11 | 407 | 359 |
| 394 | protein | 1 | 11 | 2.4K | 2.9K |
| 394 | forest policy | 1 | 11 | 553 | 709 |
| 397 | Urban Policy | 1 | 10 | 1.1K | 1.5K |
| 397 | Marine biodiversity | 1 | 10 | 671 | 699 |
| 397 | Human evolution | 1 | 10 | 751 | 1.0K |
| 397 | bats | 1 | 10 | 245 | 331 |
| 397 | urban forestry | 1 | 10 | 598 | 868 |
| 402 | exobiology | 1 | 9 | 780 | 1.1K |
| 402 | radioactive waste | 1 | 9 | 1.3K | 2.2K |
| 402 | industrial waste | 1 | 9 | 1.4K | 2.3K |
| 402 | Hazardous waste | 1 | 9 | 1.6K | 2.5K |
| 406 | Medical Technology | 1 | 8 | 4.0K | 5.0K |
| 406 | Medical Laboratory Science | 1 | 8 | 4.5K | 5.7K |
| 406 | Public Policy | 1 | 8 | 3.2K | 4.2K |
| 406 | Systems Analysis | 1 | 8 | 2.1K | 2.8K |
| 406 | Agricultural systems | 1 | 8 | 242 | 496 |
| 406 | Acarology | 1 | 8 | 665 | 956 |
| 406 | Mites | 1 | 8 | 930 | 1.1K |
| 406 | Ticks | 1 | 8 | 726 | 977 |
| 406 | Acari | 1 | 8 | 639 | 947 |
| 415 | Nuclear Chemistry | 1 | 7 | 1.8K | 2.1K |
| 415 | Radiochemistry | 1 | 7 | 2.0K | 2.3K |
| 415 | water resources | 2 | 7 | 319 | 560 |
| 418 | Mitochondrial DNA | 1 | 6 | 617 | 677 |
| 419 | Stochastic Processes | 1 | 5 | 1.7K | 2.2K |
| 419 | Renewable Energy Sources | 2 | 5 | 2.6K | 4.7K |
| 419 | Water quality | 1 | 5 | 671 | 1.2K |
| 419 | space environment | 1 | 5 | 491 | 672 |
| 423 | Marine Meteorology | 2 | 4 | 387 | 791 |
| 423 | Crystallization | 1 | 4 | 1.1K | 1.5K |
| 423 | Crystallography | 1 | 4 | 3.1K | 3.3K |
| 423 | big data | 1 | 4 | 1.1K | 1.7K |
| 423 | visualization | 3 | 4 | 2.3K | 3.5K |
| 423 | X-ray crystallography | 1 | 4 | 1.2K | 1.6K |
| 429 | Archaeology | 2 | 3 | 1.7K | 2.7K |
| 429 | Statistics | 1 | 3 | 4.7K | 5.7K |
| 429 | Experimental Design | 1 | 3 | 594 | 783 |
| 429 | Health Policy | 1 | 3 | 5.0K | 6.8K |
| 429 | Public Health Administration | 1 | 3 | 1.0K | 1.4K |
| 429 | Agricultural Biotechnology | 2 | 3 | 467 | 784 |
| 429 | industrial hygiene | 1 | 3 | 2.7K | 3.5K |
| 429 | Risk assessment | 1 | 3 | 1.4K | 2.3K |
| 429 | ecological risk assessment | 1 | 3 | 692 | 1.3K |
| 429 | Africa | 1 | 3 | 3.3K | 4.1K |
| 429 | Health Risk Assessment | 1 | 3 | 1.2K | 1.9K |
| 440 | Environmental Geography | 1 | 2 | 111 | 222 |
| 440 | Human Geography | 1 | 2 | 1.9K | 2.7K |
| 440 | disaster relief | 1 | 2 | 474 | 946 |
| 440 | planning | 1 | 2 | 1.2K | 2.1K |
| 444 | History | 4 | 1 | 1.2K | 2.0K |
| 444 | Atmospheric Science | 1 | 1 | 242 | 459 |
| 444 | Landscape Architecture | 1 | 1 | 405 | 625 |
| 444 | Bioactive compounds | 1 | 1 | 13 | 29 |
| 444 | environmental auditing | 1 | 1 | 601 | 1.2K |
| 444 | Plant tissue culture | 1 | 1 | 1.4K | 2.2K |
| 444 | Southeast Asia | 1 | 1 | 1.0K | 1.4K |
| 444 | Antarctica | 1 | 1 | 662 | 1.2K |
| 444 | Dementia | 2 | 1 | 2.4K | 3.1K |
| 444 | Alzheimer's disease | 2 | 1 | 2.4K | 3.2K |
| 454 | Geriatrics | 1 | 0 | 6.0K | 8.0K |
| 454 | Computer Science | 1 | 0 | 4.1K | 6.0K |
| 454 | Environmental Geology | 1 | 0 | 2.6K | 3.9K |
| 454 | Alternative Medicine | 1 | 0 | 3.8K | 5.8K |
| 454 | complementary therapies | 1 | 0 | 4.2K | 6.4K |
| 454 | Bipolar Disorder | 1 | 0 | 863 | 1.4K |
| 454 | Randomized Controlled Trials | 1 | 0 | 2.7K | 4.1K |
| 454 | Gerontology | 1 | 0 | 4.1K | 5.7K |
| 454 | Elderly | 1 | 0 | 2.7K | 3.3K |
| 454 | older people | 1 | 0 | 3.4K | 4.6K |
| 454 | Respiration | 1 | 0 | 2.9K | 4.4K |
| 454 | Mountains | 2 | 0 | 617 | 1.5K |
| 454 | Aging | 1 | 0 | 5.5K | 7.3K |
| 454 | Egypt | 1 | 0 | 853 | 1.7K |