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Table 4 Fatty acid compositions of M. stellatus and C. crispus: single fatty acids (mass% of total fatty acids) of initial thallus branches collected on four sampling events (October 2011, March 2012, May 2012 and August 2012)

From: Fatty acid compositions associated with high-light tolerance in the intertidal rhodophytes Mastocarpus stellatus and Chondrus crispus

Fatty acid Sampling event
October 2011 March 2012 May 2012 August 2012
14:0
 Mast-ex 2.8 ± 0.1 1.5 ± 0.0 1.8 ± 0.0 3.4 ± 0.1
 Mast-ov 2.9 ± 0.1 1.8 ± 0.0 1.9 ± 0.0 3.2 ± 0.1
 Chon-ov 3.2 ± 0.2 1.8 ± 0.1 2.4 ± 0.1 3.4 ± 0.1
16:0
 Mast-ex 30.5 ± 0.5a 26.8 ± 0.1a 28.2 ± 0.1a 32.0 ± 0.7a
 Mast-ov 29.0 ± 0.3b 26.7 ± 0.1a 28.2 ± 0.1a 31.2 ± 0.6a
 Chon-ov 30.4 ± 0.6a 27.2 ± 0.3a 28.2 ± 0.2a 29.5 ± 0.6b
16:1(n-7)
 Mast-ex 2.4 ± 0.0a 2.3 ± 0.0a 1.8 ± 0.0a 2.0 ± 0.1a
 Mast-ov 2.6 ± 0.1a 2.3 ± 0.0a 1.7 ± 0.0a 1.8 ± 0.1a
 Chon-ov 0.4 ± 0.2b 0.6 ± 0.0b 0.7 ± 0.1b 0.4 ± 0.0b
18:0
 Mast-ex 1.2 ± 0.1 1.0 ± 0.1 0.9 ± 0.0 1.3 ± 0.2
 Mast-ov 1.1 ± 0.0 1.0 ± 0.1 1.1 ± 0.1 1.4 ± 0.2
 Chon-ov 2.2 ± 0.6 1.3 ± 0.2 1.1 ± 0.1 1.3 ± 0.1
18:1(n-7)
 Mast-ex 2.2 ± 0.0 2.4 ± 0.1 2.4 ± 0.1 2.0 ± 0.0
 Mast-ov 1.9 ± 0.1 2.2 ± 0.1 2.1 ± 0.0 1.4 ± 0.1
 Chon-ov 1.2 ± 0.2 1.6 ± 0.1 1.5 ± 0.1 0.9 ± 0.0
18:1(n-9)
 Mast-ex 5.6 ± 1.4b 8.0 ± 0.1ab 6.7 ± 0.0a 5.3 ± 1.3b
 Mast-ov 8.6 ± 0.6a 8.5 ± 0.1a 6.5 ± 0.0a 6.9 ± 0.2ab
 Chon-ov 8.0 ± 0.1a 6.3 ± 0.2b 7.6 ± 0.2a 8.0 ± 0.2a
18:2(n-6)     
 Mast-ex 1.1 ± 0.1 1.0 ± 0.0 1.0 ± 0.0 1.0 ± 0.0
 Mast-ov 1.5 ± 0.2 1.1 ± 0.0 0.9 ± 0.0 1.0 ± 0.0
 Chon-ov 1.4 ± 0.2 2.3 ± 0.3 1.6 ± 0.1 1.6 ± 0.6
20:4(n-6)
 Mast-ex 25.3 ± 0.9b 16.5 ± 0.5b 13.8 ± 0.4c 25.0 ± 0.4ab
 Mast-ov 24.4 ± 0.5b 13.4 ± 0.7c 15.9 ± 0.3b 23.7 ± 0.4b
 Chon-ov 27.4 ± 0.4a 25.8 ± 0.9a 24.8 ± 1.0a 25.9 ± 0.4a
20:5(n-3)
 Mast-ex 25.9 ± 0.5a 37.0 ± 0.6b 40.0 ± 0.4a 25.8 ± 0.4b
 Mast-ov 24.1 ± 0.4a 39.4 ± 0.9a 38.7 ± 0.4a 26.0 ± 0.7b
 Chon-ov 24.5 ± 1.5a 32.8 ± 1.0c 31.1 ± 0.7b 28.1 ± 0.1a
  1. Table shows mean ± SEM (n = 5, with exception of n = 4 for Chon-ov collected in August 2012). The nomenclature of fatty acids (a:b(n-x)) is defined as follows: a = number of C-atoms (chain length), b = number of double bonds and (n-x) = position of the first double bond relative to the methyl-end. Dark circles indicate isolate-specific (Mast-ex, Mast-ov and Chon-ov) differences within all four sampling events that are significant at p < 0.05 (significant isolate effect of 2-way ANOVA followed by a Fisher’s LSD test). Different letters (a, b and c) indicate significant differences among algal isolates within one of the four sampling events (significant interaction isolate × sampling event of 2-way ANOVA followed by a Fisher’s LSD test, p < 0.05)
  2. Mast-ex, Mastocarpus stellatus from higher levels of the lower intertidal; Mast-ov, Mastocarpus stellatus from overlapping zone in deeper levels of lower intertidal; Chon-ov, Chondrus crispus from overlapping zone in deeper levels of lower intertidal; SEM, standard error of the mean