| Comments |
P.102 right column bottom paragraph: "Indicators of plankton biomass were lower in the winter than during the summer. Across lakes and latitude, average winter chlorophyll a (± SE) (5.87 ± 0.88 μg/L, Fig. 2) in the primary data ranged much more widely than in those from [investigators'] literature survey (Fig. S2), although still significantly lower than that of summer (13.6 ± 2.84 μg/L, P < 0.0001, Table 1). Using the regression tree approach, the shallowest lakes (max depth < 2.93 m, n = 13 lakes) showed greatest disparity in chlorophyll, with summers higher than winters by 52.3 ± 18.2 μg/L (R^2 for chl a tree = 0.330). Under-ice phytoplankton biovolume averaged about 1/6th that of the summer average (n = 17, P < 0.001 by LME, Table 1)." DOC=dissolved organic carbon, TDN=Total dissolved nitrogen, TDP= Total dissolved phosphorus, TN=Total nitrogen, TP=Total phosphorus, chl a=chlorophyll a |