Fig. 1
From: Thresholds of lake and reservoir connectivity in river networks control nitrogen removal
The relative effect of ponded waters versus streams on nitrogen removal in the Northeastern United States. a Cumulative proportion of total nitrogen removed annually by ponded waters relative to streams (expressed as a difference) throughout the river network, where each stream reach and ponded water catchment is colored. A positive (red) value indicates that nitrogen removal is dominated by ponded waters and a negative value (blue) indicates that nitrogen removal is dominated by streams (see Methods). b Pond density (cumulative upstream pond surface area to cumulative upstream drainage area) throughout the river network. Maps created using model results, data from NHD35, and expressions in the Methods
