Canonical correspondence analysis of species scores and environment gradients on Hog Island (left panel) and Metompkin Island (right panel).

<p>Axes scores were derived from site attributes. “Bch_wdth” is the distance from the mean water line to the edge of the foredune, “Dist” is the distance from the sample plot to the high tide line, “Elev” is elevation above mean sea level, “Mean_Grn” is the mean sand particle size, and “Std_Dev” is a metric representing the heterogeneity of sand grain sizes at each point. Species codes: AMBR = <i>Ammophila breviligulata</i>, ANSC = <i>Andropogon scoparius</i>, CAED = <i>Cakile edentula</i>, CHMA = <i>Chamesyche maculata</i>, CIHO = <i>Cirsium horridulum</i>, COCA = <i>Conyza canadensis</i>, CYES = <i>Cyperus esculentes</i>, LESP = <i>Lepidium</i> sp., MOCE = Morella cerifera, PAAM = <i>Panicum amarum</i>, PADI = <i>Panicum dichotiflorum</i>, RUAC = <i>Rumex acetosella</i>, SPPA = <i>Spartina patens</i>, SOSE = <i>Solidago sempervirens</i>, SCLA = <i>Scutellaria lateriflora</i>, TRDU = <i>Tragopogon dubius</i>.