Table 1
Codes, names, sample sizes and composite richness for coarse-grain NRSA study units.
| Code | Unit Name | Fish # Sites | Fish species richness | Macroinvertebrate # Sites |
Macroinvertebrate genus richness |
|---|---|---|---|---|---|
| ALL NRSA | 2554 | 582 | 3358 | 813 | |
| Ecoregion CPL | Coastal Plains | 388 | 320 | 471 | 459 |
| NAP | Northern Appalachians | 357 | 144 | 392 | 451 |
| NPL | Northern Plains | 234 | 84 | 288 | 392 |
| SAP | Southern Appalachians | 428 | 350 | 493 | 456 |
| SPL | Southern Plains | 204 | 127 | 266 | 357 |
| TPL | Temperate Plains | 329 | 177 | 392 | 374 |
| UMW | Upper Midwest | 231 | 134 | 284 | 406 |
| WMT | Western Mountains | 214 | 88 | 434 | 484 |
| XER | Xeric West | 169 | 101 | 338 | 435 |
| HUCs | |||||
| 01 | New England | 192 | 77 | 208 | 377 |
| 02 | Mid-Atlantic | 214 | 128 | 254 | 406 |
| 03 | South Atlantic-Gulf | 239 | 294 | 299 | 433 |
| 04 | Great Lakes | 164 | 131 | 197 | 415 |
| 05 | Ohio | 213 | 196 | 238 | 384 |
| 06 | Tennessee | 50 | 152 | 53 | 280 |
| 07 | Upper Mississippi | 233 | 162 | 283 | 377 |
| 08 | Lower Mississippi | 152 | 159 | 168 | 313 |
| 09 | Souris-Red-Rainy | 38 | 72 | 51 | 256 |
| 10 | Missouri | 471 | 150 | 589 | 476 |
| 11 | Arkansas-White-Red | 185 | 169 | 231 | 391 |
| 12 | Texas Gulf | 72 | 97 | 89 | 254 |
| 13 | Rio Grande | 20 | 47 | 47 | 256 |
| 14 | Upper Colorado | 66 | 39 | 117 | 294 |
| 15 | Lower Colorado | 37 | 30 | 72 | 250 |
| 16 | Great Basin | 22 | 29 | 72 | 263 |
| 17 | Pacific Northwest | 137 | 61 | 304 | 406 |
| 18 | California | 49 | 49 | 86 | 302 |
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