Table 2. Grasshopper communities, phenological advancements and GDDs.
| Station Species | Earliest day of year of 2006 | Change in timing to adulthood | GDDs* | ||
| adult appearance (1959–1960) | 2007 | 2008 | (±SE) | ||
| Chautauqua Mesa (1752 m) | |||||
| Aeropedullus clavatus | 152 | — | −11 | 4 | 232+ |
| Melanoplus confusus | 155 | — | 0 | 1 | 274+ |
| Melanoplus sanguinipes | 176 | — | 7 | 2 | 507 (27) |
| Melanoplus bivittatus | 181 | — | 2 | −9 | 548 (14) |
| Melanoplus dawsoni | 186 | — | −5 | −1 | 580 (18) |
| Hesperotettix viridis | 186 | — | −3 | −4 | 580 (18) |
| Station A1 (2195 m) | |||||
| Aeropedullus clavatus | 167 | — | −10 | −3 | 190 |
| Melanoplus confusus | 167 | — | 8 | −3 | 190 |
| Melanoplus dodgei | 174 | — | −17 | −16 | 240 |
| Melanoplus sanguinipes | 183 | — | 7 | 1 | 292 |
| Cratypedes neglectus | 195 | — | −26 | −19 | 386 |
| Camnula pellucida | 195 | — | 10 | 3 | 386 |
| Hesperotettix viridis | 202 | — | −12 | −4 | 433 |
| Melanoplus bivittatus | 202 | — | 3 | −11 | 433 |
| Trimerotropis cincta | 202 | — | 3 | −4 | 433 |
| 3.9 km West of Station B1 (2591 m) | |||||
| Aeropedullus clavatus | 172 | −13 | −17 | −10 | 137 (19) |
| Melanoplus dodgei | 172 | −13 | −17 | −10 | 137 (19) |
| Camnula pellucida | 202 | −14 | − 5 | −11 | 289 (6) |
| Circotettix rabula | 207 | −19 | −10 | −16 | 315 (20) |
| Melanoplus dawsoni | 215 | −27 | −18 | −8 | 367 (6) |
| Melanoplus packardii | 216 | −28 | −26 | −18 | 389 (16) |
| Chloealtis abdominalis | 216 | −21 | −19 | −18 | 389 (16) |
| Station C1 (3048 m) | |||||
| Melanoplus dodgei | 182 | −10 | −5 | −3 | 61(1) |
| Melanoplus fasciatus | 202 | −15 | −3 | −5 | 111 (15) |
| Camnula pellucida | 209 | −22 | −10 | − 3 | 144 (26) |
| Chloealtis abdominalis | 216 | −16 | −17 | −10 | 159 (26) |
*for A1, only GDD values for 1959 are provided.
+
Only GDDs for 1960 available and provided.
Time to first appearance of adults during 2006 to 2008 at the four resurvey sites compared to the first day of adult appearance in 1959–1960. Species are arranged within sites from those that reach adulthood earlier to later in the season. Negative numbers reflect advancements in the days to adulthood, while positive numbers reflect a relative delay in timing to adulthood. Bolded numbers reflect periods that exceed at least a sampling week between the previous and current surveys. The number of growing degree days (GDDs) required by the species during the 1959 to 1960 survey are also shown.