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- W2109099312 abstract "Fruits/seeds weights, flight patterns and dispersal distances of 17 plant families consisting of 30 tree species and 180 individuals were studied at the rainforests at Umudike and Oban Forest Reserve, Nigeria. The weight was measured using the Ohus Scout sensitive weighing balance; while the length and width of 30 fruits and 30 seeds of each tree species were measured using Digital Mitutoyo Japan Caliper. Cup anemometer was used in measuring wind speed. The flight pattern was observed using Audubon Swift binocular. A total of 33.33 percent of the tree fruits/seeds had dispersal appendages. Dust fruits/seeds were not observed. Ceiba pentandra had the furthest dispersal distance of 95.63 m because of it’s possession of the silk cotton. Pterocarpus soyauxii, Terminalia superba and Hildegardia barteri had 89.70, 56.99 and 56.88 m, respectively. Weight of fruit/seed had a lot of adverse effects on the dispersal of plant fruits/seeds. A negative co-relationship existed between the dispersal distance and the weight of fruits observed. The plant species producing drupe fruits had a weight range of between 2.02 and 106.88 g. The drupe fruits dropped vertically down. Plant species having samara/capsule fruit types had a weight range of between 0.23 and 83.77 g. The weight and the position of the seed such as those of the genera Entandrophragma favoured helical trajectory at the general wind speed of between 0.1 and 3.0 ms1. It was observed that many fruits such as those of Milicia excelsa have no dispersal appendage and dropped vertically down. It was observed that such a drupe, berry and achene fruits clustered under the crown of the dispersing tree. Such fruits depended on gravitational force, bats and animals for dispersal. These vertebrate animals were not frequently seen feeding on the fruits and most of the fruits fell vertically down due to gravitational force. Their entry to adequate microsites for seed germination and seedling establishment depended on chance. Most seedlings of the dispersing tree species under the crown of dispersing tree rarely establish and grow to pole size. There is the need for man to assist in the selection of adequate microsite best for each plant species’ seed germination and seedlings’ establishment or these plants species could become listed as endangered or rare. If the tropical rainforest is to survive, potential sources of desirable seeds are required for plant colonization of abandoned areas." @default.
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- W2109099312 date "2010-01-01" @default.
- W2109099312 modified "2023-09-27" @default.
- W2109099312 title "Fruits/seeds weights, flight patterns and dispersal distances of some Nigerian rainforest tree species." @default.
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