Biomass or abundance of several taxa during baseline (1999–2000), treatment (2001–2003; shaded area) and post-treatment (2004–2005) periods in Lake 260, and comparisons with data from one or several reference lakes (see below) over the same time period. (a) Annual average biomass of epilimnetic bacteria (mg m−3) in Lake 260 and reference lakes (Lakes 224, 239, 373 and 442) standardized to the long-term average biomass in the suite of reference lakes. (b) Annual mean biomass of epilimnetic phytoplankton (mg m−3) in Lake 260 and reference lakes (Lakes 224, 239, 373 and 442). (c) Annual mean biomass of crustacean zooplankton (μg l−1) in Lake 260 and reference lakes (Lakes 224, 239, 373 and 442). (d) Annual mean biomass of rotifers (μg l−1) in Lake 260 and reference lakes (Lakes 224 and 239). (e) Annual aerial abundances of Chaoborus spp. (number m−2) in Lake 260 and reference Lake 240. (f) Annual average aerial abundances of emerging littoral invertebrates (number m−2) in Lake 260 and reference Lake 442. (g) Annual mean biomass of adult fathead minnow (kg ha−1) in Lake 260 and reference Lake 442 (autumn minnow traps). (h) Annual mean CPUE of YOY fathead minnow in Lake 260 and reference Lake 442 (autumn trap netting). (i) Annual mean biomass of adult pearl dace (kg ha−1) in Lake 260 and reference Lake 442 (autumn minnow traps). (j) Annual autumn CPUE of slimy sculpin in Lake 260 and reference Lake 442 (autumn trap netting). (k) Annual mean biomass of white sucker (kg ha−1) in Lake 260 and reference Lake 442 (spring trap netting). (l) Annual mean biomass of adult lake trout (kg ha−1) in Lake 260 and reference Lake 442 (autumn trap and gill netting).