Table 1 Six study sites where eastern hemlocks were sampled for evaluating the influence of hemlock woolly adelgid (HWA) on radial growth
From: Radial growth changes following hemlock woolly adelgid infestation of eastern hemlock
Site | Latitude | Longitude | Elevation (m) | Winter temp (C) | Annual Precipation (mm) | First HWA sighting | Crown dieback (%) |
|---|---|---|---|---|---|---|---|
Georgia | 34°53′N | 84°39′W | 600 | 5.2 | 1,332 | 2008 | 10 |
North Carolina | 35°17′N | 82°43′W | 670 | 3.7 | 1,393 | 2005 | 22 |
Virginia | 37°11′N | 80°29′W | 570 | 0.8 | 1,095 | 1998 | 15 |
West Virginia | 38°37′N | 79°47′W | 900 | −1.8 | 1,265 | 1993 | 13 |
Pennsylvania | 40°00′N | 77°48′W | 500 | −1.4 | 1,010 | 1993 | 15 |
Massachusetts | 42°21′N | 72°22′W | 180 | −4.0 | 1,100 | 1996 | 10 |