Supporting Information

Parker et al. 10.1073/pnas.0806481105

Table S1. Species abbreviations used in Fig. 4A Major taxon Species Abbreviation Major taxon Species Abbreviation Dinobryon cylindraceum Dino cyli Diatoms Achnanthes flexella Achn flex Dinobryon sociale Dino soci Achnanthes lanceolata Dinobryon sp. (monad) Achnanthes minutissima Kephyrion boreale Keph bore Cocconeis placentula Kephyrion sp. Cyclotella atomus Cycl atom Mallomonas sp. Cyclotella bodanica Cycl boda Ochromonas minima Ochr mini Cyclotella comensis Cycl come Ochromonas sp. Cyclotella glomerata Pseudopedinella sp. Cyclotella ocellata Cycl ocel Salpingoeca sp. Cyclotella sp. Synura sp. Cymbella arctica Cymb arct Cymbella descripta Cymb desc Cryptophytes Cryptomonas erosa Cryp eros Cymbella minuta Cymb minu Cryptomonas marsonii Cryp mars Cymbella sp. Cryptomonas ovata Denticula subtilis Dent subt Cryptomonas platyrius Cryp plat Diatoma vulgare Diat vulg Cryptomonas reflexa Cryp refl Fragilaria capucina Frag capu Cryptomonas rostratiformis Cryp rost Fragilaria construens Cryptomonas sp. Fragilaria cyclopum Frag cycl Katablepharis ovalis Kata oval Fragilaria filiformis Rhodomonas lens Rhod lens Fragilaria tenera Rhodomonas minuta Rhod minu Fragilaria pinnata Frag pinn Gomphonema parvulum Gomp parv Dinoflagellates Amphidinium sp Gomphonema sp. Gymnodinium fungiforme Gymn fung Meridion circulare Meri circ Gymnodinium fuscum Navicula cryocephala Gymnodinium helvetica Gymn helv Navicula pupula Gymnodinium inversum Gymn inve Nitzschia perminuta Gymnodinium lacustre Gymn lacu Nitzschia sp. Gymnodinium ordinatum Synedra filiformis Gymnodinium sp. Tabellaria flocculosa Cyanobacteria Limnothrix redekei Chlorophytes Ankyra sp. Oscillatoria limnetica Osci limn Chlamydomonas frigida Chla frig Planktothrix agardhii Chlamydomonas gloeophila Chla gloe Pseudanabaena galeata Pseu gale Chlamydomonas snowii Chlamydomonas sp. Xanthophytes Ophiocytium capitatum Ophi capi Chlorogonium minimum Chlo mini Crucigenia quadrata Species shown in plot are in italics. Additional species used in CCA are in Elaktothrix gelatinosa regular font. Elakatothrix genevensis Elak genv Eutretramorus planktonicus Gonium sociale Gloeocystis aeruginosa Gloeocystis sp. Monoraphidium brauni Mono brau Monoraphidium komarkovae Mono koma Monoraphidium setiforme Monoraphidium tortile Mono tort Oocystis submarina Tetraedon minima

Chrysophytes Chromulina sp. Chro muli Chrysochromulina parva Chry parv Dinobryon attenatum Dino atte

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