| AND | H.J. ANDREWS EXPERIMENTAL
FOREST | BLUE RIVER OREGON |
| ARC | ARCTIC TUNDRA | TOOLIK LAKE BROOKS RANGE |
| BNZ | BONANZA CREEK EXPERIMENTAL
FOREST | FAIRBANKS ALASKA |
| CWT | COWEETA HYDROLOGIC
LABORATORY | OTTO NORTH CAROLINA |
| JRN | JORNADA BASIN | LAS CRUCES NEW MEXICO |
| KNZ | KONZA PRAIRIE RESEARCH
NATURAL AREA | MANHATTAN KANSAS |
| MCM | MCMURDO DRY VALLEYS | MCMURDO STATION ANTARCTICA |
| NTL | NORTH TEMPERATE
LAKES | NEAR BOULDER JUNCTION WISCONSIN |
| NWT | NIWOT RIDGE/GREEN LAKES
VALLEY | NEAR BOULDER COLORADO |
| PAL | PALMER STATION | ANTARCTICA |
| SEV | SEVILLETA NATIONAL WILDLIFE
REFUGE | NEAR ALBUQUERQUE NEW MEXICO |
| SGS | SHORTGRASS STEPPE | NUNN COLORADO |
| VCR | VIRGINIA COAST
RESERVE | NEAR OYSTER VIRGINIA |