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Effects of an invasion of an alien shrub species, Leucaena leucocephala, were investigated on subsequent establishment of a native mid-successional wooden species, Schima mertensiana at early-successional stages after disturbance in a subtropical oceanic island, Chichijima in Japan. Changes in basal areas, densities and size distribution of forests at a site dominated by L leucocephala were compared...
Changes in vegetation of the Nakoudojima island between 1978, 1991 and 2003 were quantified with aerial photographs. The island was divided into 9200 plots (10 m × 10 m) on the aerial photographs and the plots were categorized into forest, grassland, bare ground or others. Percentages of the grassland increased 66.3% to 69.0% and those of the bare ground increased from 7.0% to 15.5% for 23 years....
We investigated the effects of the accumulation of litter of an alien tree, Casuarina equisetifolia, on the initial establishment of Schima mertensiana, a tree native to the Ogasawara (Bonin) Islands, in the northwestern Pacific Ocean, in field and greenhouse experiments. The field experiment compared emergence of seedlings in forests dominated by C. equisetifolia with those in native forests, with...
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