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Table 7. Tin concentrations in field collections of living flora and fauna. <br />Unless indicated otherwise, all values are in mg total Sn/kg fresh weight <br />(FW) or dry weight (DW) tissue. <br />Taxonomic group, organism, <br />and other variables <br />Concentration, Referenceb <br />in ppm <br />ALGAE AND HIGHER PLANTS <br />Algae, marine <br />Whole, 10 species (11-49) DW 1 <br />Whole, 2 species (96-101) DW I <br />Swiss chard, whole, <br />Beta vulgaris cicla <br />Grown in soil at pH <br />5.5 (12-51) DW 2 <br />6.0 8 DW 2 <br />6.5 <0.5 DW 2 <br />Mangrove, Bruguiera <br />caryophylloides, leaf <br />Controls 1.3 DW 2 <br />On Sn drainage 9.4 DW 2 <br />Green alga, Enteromoraha spp. <br />Inorganic tin 0.4 FW; 4.4 DW 3 <br />Monomethyltins 0.5 FW 3 <br />Dimethyltins 0.5 FW 3 <br />Trimethyltins <0.001 FW 3 <br />Tetramethyltins NO 3 <br />Monobutyltins 0.006 FW; 0.4 DW 3 <br />Tributyltins 0.05 FW; 0.6 DW 3 <br />Seaweeds, whole, 5 species <br />May (0.5-1.8) DW 1 <br />June (0.5-2.2) DW 1 <br />June (0.1-0.5) FW 1 <br />Wheat, Triticum vulgare <br />Japan 0.5 FW 2 <br />USA (5.6-7.9) FW 2 <br />Elm, Ulmus americana <br />Wood, Vermont <br />40 years old 1.7 FW; 1.8 DW 2 <br />80 years old 1.4 FW; 1.5 DW 2 <br />Vegetation <br />Near tin smelter (338-2,165) DW 2 <br />Corn, Zea mays 0.1 FW 2 <br />28