G. semen dynamics over large scales

Data were collected in76 lakes sampled annually between 1997 and 2010 as part of the Swedish National Monitoring program. Abbreviated headlines are as follows: "Limes_Norr" = Location south (1) or north (2) of Limes Norrlandicus; "number_cells" = number of cells L-1; "Temp_Aug"= mean temperature in August; "pH_Aug"= pH in August; "NH4-N_Aug" = Ammonia mg L-1 in August; "Tot_N_Aug" = total nitrogen mg L-1 in August; "PO4-P__Aug"= orthophosphate mg L-1 in August; "Tot-P_Aug"= total phosphorous mg L-1 in August; "Abs._F_Aug" = absorbance nm in August; "Temp_April"= mean temperature in April; "pH_April"= pH in April; "NH4-N_April" = Ammonia mg L-1 in April; "Tot_N_April" = total nitrogen mg L-1 in April; "PO4-P__April"= orthophosphate mg L-1 in April; "Tot-P_April"= total phosphorous mg L-1 in April; "Abs._F_April" = absorbance nm in April; "TGSL"= length of growing season as number of days; "area_geom"= total lake surface in ha; "perim_geom"= lake perimeter in Km; "avg_shore_slope"= mean shore slope; "LakeMeanDepth"= lake mean depth in m.