Fig. 6

Scatterplot of the first (CA1) and second (CA2) axes of canonical correspondence analysis of fish assemblage composition and environmental variables in agriculture and forest streams of the Mississippi Alluvial Plain. Triangles represent forest streams; squares represent agriculture streams. Sixteen fish species that comprised > 1% of the total catch each were included in the analysis. Vectors represent environmental variables with variable–axis correlations of either ≤ − 0.3 or ≥ 0.3. Species codes: LEGL = warmouth; LEHU = orangespotted sunfish; LEMA = bluegill; POAN = white crappie; OPEM = pugnose minnow; HYAM = pallid shiner; NOTE = weed shiner; CYLU = red shiner; PIVI = bullhead minnow; NOAT = emerald shiner; NOBL = river shiner; NOGY = tadpole madtom; GAAF = western mosquitofish; APSA = pirate perch; LASI = brook silverside; FUOL = blackspotted topminnow. Environmental variable codes: DO = dissolved oxygen; CON = specific conductance; ALK = alkalinity; TN = total nitrogen; TP = total phosphorus; BC = benthic chlorophyll-a; HAB = total habitat score; SAL = salinity; pH = pH; NO3 = nitrate; PO4 = phosphate