| water relations of epiphytic and terrestrially-rooted strangler figs in a venezuelan palm savanna. | water use patterns of two species of strangler fig, ficus pertusa and f. trigonata, growing in a venezuelan palm savanna were contrasted in terms of growth phase (epiphyte and tree) and season (dry and wet). the study was motivated by the question of how c3 hemiepiphytes accommodate the marked change in rooting environment associated with a life history of epiphytic establishment followed by substantial root development in the soil. during the dry season, stomatal opening in epiphytic plants occ ... | 1996 | 28307439 |
| seed banks on attalea phalerata (arecaceae) stems in the pantanal wetland, brazil. | seeds can accumulate in the soil or elsewhere, such as on the stems of palms when these are covered by persistent sheaths. these sheaths could act as a safe site for some species. here, we studied whether persistent sheaths of the palm attalea phalerata (arecaceae) are available sites for seed accumulation in the pantanal wetland of brazil. we also investigated whether the composition, richness and diversity of species of seeds in the persistent sheaths are determined by habitat (riparian forest ... | 2012 | 22210851 |
| sex ratio in two species of pegoscapus wasps (hymenoptera: agaonidae) that develop in figs: can wasps do mathematics, or play sex ratio games? | the fig pollinating wasps (hymenoptera: agaonidae) have obligate arrhenotoky and a breeding structure that fits local mate competition (lmc). it has been traditionally assumed that lmc organisms adjust the sex ratio by laying a greater proportion of male eggs when there is superparasitism (several foundresses in a host). we tested the assumption with two wasp species, pegoscapus silvestrii, pollinator of ficus pertusa and pegoscapus tonduzi, pollinator of ficus eximia (= f citrifolia), in the ce ... | 2009 | 19928457 |