Table 3.
Main characteristics of the eight tank-bromeliad morphospecies sampled
| Metabolism ID | CAM-Bromelioideae |
C3-Tillandsioideae |
|||||||
|---|---|---|---|---|---|---|---|---|---|
| AA | AB | SL_CF | AM_CF | AM_PG | CB | GL | VP | VS | |
| Ants | No | No | Yes | Yes | Yes | No | No | No | No |
| WV*** | 949·2 ± 104·3a | 137·8 ± 21·1b | – | 129·0 ± 16·2b | 41·1 ± 5·8c | 40·6 ± 3·7c | 17·4 ± 2·5d | 73·2 ± 9·1e | 48·5 ± 5·0c |
| FPOM*** | 10·8 ± 1·3a | 1·1 ± 0·2b | – | 10·9 ± 2·2a | 1·5 ± 0·3b | 0·7 ± 0·08b | 1·0 ± 0·1b | 1·7 ± 0·2b | 4·2 ± 0·4c |
| PPR*** | 0·34 ± 0·02a | 0·14 ± 0·04b | – | 0·43 ± 0·04a | 0·37 ± 0·06a | 0·42 ± 0·07a | 0·19 ± 0·10b | 0 | 0·06 ± 0·03b |
| Algae*** | 454·4 ± 226·3a | 0·27 ± 0·10c | – | 123·8 ± 65·0b | 2·1 ± 0·7d | 60·2 ± 33·7b | 0·06 ± 0·01c | 0·3 ± 0·1c | 1·3 ± 0·7cd |
| δ15N*** | –0·2 ± 0·3abc | 0·5 ± 0·3ab | –0·4 ± 0·3abc | 1·7 ± 0·2e | 0·5 ± 0·2ac | –1·1 ± 0·3cd | –0·5 ± 0·3bd | –0·2 ± 0·1abcd | 0·6 ± 0·1cd |
| N*** | 0·46 ± 0·03a | 0·64 ± 0·02bf | 0·8 ± 0·1bcef | 0·89 ± 0·04d | 0·68 ± 0·02be | 0·64 ± 0·03be | 0·83 ± 0·05cde | 0·90 ± 0·03cd | 0·71 ± 0·05bcdef |
Shown are mean (±s.e.) water volume (WV, mL), fine particulate organic matter (FPOM, mL), predator/prey richness ratio (PPR), algal density (algae, 103 mL−1), natural abundance of stable nitrogen isotope (δ15N, ‰) and nitrogen concentration (N, %). AA, Aechmea aquilega; AB, Aechmea bromeliifolia; SL_CF, Streptocalyx longifolius associated with Camponotus femoratus; AM_CF, Aechmea mertensii associated with Camponotus femoratus; AM_PG, Aechmea mertensii associated with Pachycondyla goeldii; CB, Catopsis berteroniana; GL, Guzmania lingulata; VP, Vriesea pleiosticha; VS, Vriesea splendens.
Asterisks indicate significant differences after the Kruskall-Wallis test (***P < 0·001). Values marked with the same letter are not significantly different (Bonferroni corrected Mann–Whitney pairwise comparisons, P < 0·05).