Figure 3
From: Variable climatic conditions dominate recent phytoplankton dynamics in Chesapeake Bay
(a,b) Time-series (1945–2012) of mean (±SE) annual N loadings (TN and NO2 + NO3) at the Conowingo Dam. Data from Hagy et al.14 (open circles, 1945–1980), and USGS (closed circles, 1981–2012)52. Dashed lines depict GAM fits; solid lines depict flow-adjusted GAM outputs. Annotations on panel (a) refer to: (1) period of increasing TN loading from 1945 to 1980; (2) leveling off ca. 1980; (3) decreasing TN loading from 1981–2012. Adapted from Harding et al.2.
