Pollination ecology of Melaleuca cajuputi, Nypa fruticans and their flower visitors.
Nguyen Quang Tan
The submerged Melaleuca forests have an important role in the regulation of climate and the protection of wildlife and the environment in southern Vietnam. This paper studies the pollination ecology of the Asian giant honey bee (Apis dorsata), the Asian dwarf honey bee (Apis florea) and other pollinators on the two prominent plants (Melaleuca cajuputi and Nypa fruticans) in the forests. The results show that the nectar of Melaleuca flowers was secreted in the largest volume with the lowest sugar content in the early morning. Then, due to evaporation, the volume dropped to the lowest with the highest sugar content in the early afternoon. The sugar value present in Melaleuca flowers was the highest (466 μg of sugar per flower) at 10.00 h in the morning. Nypa flowers opened early in the morning, their pollen release increased gradually, reached a peak at 09.00 h and finished at sunset. The study of pollinators on the Melaleuca and Nypa flowers showed the three following forms of partitioning in the Melaleuca forests: 1. Different plants have different visitors; 2. Different visitors visit the same plant at different times; and 3. For a visitor species, time is partitioned to visit different plants.