Fig. 1.

Map of study sites, abbreviations as follows: Suisun Marsh (SM), Gates Canyon (GC), West Sacramento (WS), North Sacramento (NS), Rancho Cordova (RC), Washington (WA), Lang Crossing (LC), Donner Pass (DP), Castle Peak (CP), and Sierra Valley (SV). Years near site labels indicate the year in which continuous sampling began at each site. The Inset in the Upper Left shows the location of the study area in Northern California. The Inset in the Lower Right is a cross-sectional schematic of Northern California, showing the elevational profile of the study sites.