Table 2.
Means and standard deviation of nectar sugar concentration and sugar ratio, nectar volume covered and nectar standing crop of flowers in different pollination syndromes
| Syndrome | n | Conc. (%w /w)  ± s.d. |
Sugar ratio S/(F + G)  ± s.d. |
Nectar volume 24 h covered (μL)  ± s.d. |
Standing crop 0600–1800 h (μL)  ± s.d. |
Mann–Whitney U Nectar volume covered vs. standing crop |
|---|---|---|---|---|---|---|
| Myiophilous | 61 | 31·1 ± 15·2 | 1·2 ± 1·8 a | 0·7 ± 0·3 a,b,c | 0·2 ± 0·2 a,b,c | z = 2·2, P = 0·025 |
| Melittophilous | 172 | 25·9 ± 12·8 | 2·9 ± 3·2 | 2·0 ± 1·8 e,g,h | 0·5 ± 0·3 d,e | z = 2·3, P = 0·021 |
| Ornithophilous | 13 | 17·0 ± 5·1 | 2·6 ± 0·9 | 20·6 ± 17·2 a,d,e | 2·6 ± 1·9 a,d | z = 3·4, P = 0·000 |
| Sphingophilous (including one psychophilous species) | 7 | 16·8 ± 3·9 | 6·4 ± 5·6 a,b | 26·5 ± 18·5 b,f,g | 8·8 ± 12·5 b | z = 3·8, P = 0·000 |
| Chiropterophilous | 4 | 14·1 ± 5·9 | 0·6 ± 0·2 b | 85·7 ± 17·7 c,d,f,h | 4·5 ± 3·5 c,e | z = –2·2, P = 0·025 |
| ANOVA/K–W ANOVA | F4,42 = 3·7 P = 0·011 | F4,41 = 4·3 P = 0·005 | F4,40 = 29·3 P = 0·000 | H(4, 7) = 27·4 P = 0·000 |
Mann–Whitney U-test of significant differences between covered nectar volumes and standing crop.
n = number of species, 1number of species nectar production: n = 4 myiophilous syndrome; 2number of species sugar ratio: n = 16 melittophilous syndrome.
A same letter following the values indicates significantly different pairs after ANOVA with following Tukey–Kramer HDS post-hoc test (α = 0.05) or Kruskall–Wallis ANOVA with Tukey–Kramer post-hoc test (α = 0.05).