Table 5: Mean values of elemental composition (ppm) of eleven species of seaweeds collected in Fernando de Noronha Archipelago, off northeastern Brazil and their respective CV, coefficient of variation (%).

SpeciesAsBaBrCaCoCrCsCuDyFeKMnMoNiPbRbSrTiVZn

Chlorophyta
C. verticillata 10.82 (11.26) 8.60 (13.63) 20639.78 (0.93) 11.91 (12.51) 2559.68 (0.47) 504.13 (5.08) 21.43 (6.40) 511.19 (1.80) 108.86 (3.66) 14.06 (8.37) 11.44 (3.83)
Rhodophyta
A. taxiformis 257.10 (2.64) 88908.21 (1.95) 25.87 (10.30) 108.47 (10.46) 4108.09 (1.77) 1988.31 (3.22) 77.14 (9.75) 12.18 (9.48) 2121.10 (1.79) 224.55 (4.35) 39.63 (5.53) 17.35 (1.61)
D. occidentalis12.03 (8.43)15366.59 (0.30)6.26 (7.96)62.98 (17.10)1.55 (11.38)6.12 (15.43)915.92 (1.15)49523.34 (1.29)10.33 (4.35)465.94 (14.12)13.78 (10.85)718.43 (2.12)3.21 (18.63)
G. rugosa1.65 (17.96)22949.59 (1.63)5.28 (2.41)192.80 (5.05)21.66 (15.51)513.81 (2.55)1092.76 (3.99)15.64 (1.90)832.84 (12.86)2.00 (9.25)1735.42 (3.63)2.36 (12.17)
G. obtusata41500.55 (6.75)358.28 (7.76)39.57 (14.48)245.12 (5.92)2611.29 (6.96)23.58 (23.38)671.37 (9.99)3002.25 (9.42)3.80 (16.81)
G. marginata82606.32 (0.88)736.05 (3.21)54.34 (9.56)75.27 (7.73)15655.44 (0.62)39.79 (5.66)836.71 (7.84)5957.57 (1.53)5.70 (18.02)
Phaeophyta
D. cervicornis 20.21 (8.44) 44313.30 (1.04) 19.53 (5.43) 3621.88 (0.88) 40527.54 (1.21) 60.85 (4.33) 27.22 (1.73) 2272.40 (0.61) 181.51 (5.68) 44.39 (10.78) 25.54 (2.92)
D. justii17.35 (2.37)21.39 (14.88)3.56 (12.04)18394.89 (4.26)3.53 (4.81)1410.02 (4.05)7370.06 (4.41)30.33 (3.94)5.35 (16.12)3046.38 (4.15)33.87 (3.00)22.50 (1,67)
D. plagiogramma56397.66 (2.17)53.64 (7.44)289.32 (15.38)46.31 (19.97)11936.65 (2.62)10593.50 (2.35)78.34 (6.44)15.15 (5.23)17.56 (16.64)47.58 (12.20)1521.78 (0.91)537.01 (7.26)24.58 (3.78)
P. gymnospora15.20 (2.28)8.03 (10.63)3028.40 (0.55)1.93 (17.99)148.77 (2.46)1.10 (11.52)251.77 (0.73)9910.06 (0.51)7.04 (6.41)1.91 (13.19)12.75 (17.70)881.64 (1.21)274.44 (0.33)
Sargassum sp.117.92 (0.10)16.63 (5.92)14035.01 (0.70)5.35 (7.23)1.61 (9.72)172.12 (1.91)27196.26 (0.84)21.53 (5.85)2.68 (8.54)36.43 (9.32)1453.50 (0.77)14.13 (6.20)6.15 (5.63)

Average34.6721.3945.1137103.663.6020.41298.031.4246.082346.4015179.3335.09701.716.2714.7427.632111.06262.9829.2236.10

—: not detected.