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首页> 外文期刊>Biotropia: the Southeast Asian journal of tropical biology >Soil Seed Bank of An Exotic Acacia sp. Plantation and An Adjacent Tropical Heath Forest in Brunei Darussalam
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Soil Seed Bank of An Exotic Acacia sp. Plantation and An Adjacent Tropical Heath Forest in Brunei Darussalam

机译：异国相思树种的土壤种子库。文莱达鲁萨兰国的人工林和毗邻的热带荒地森林

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We compared seedling emergence and soil seed bank composition under an Acacia mangium plantation and an adjacent tropical heath forest in the Andulau Forest Reserve, Brunei Darussalam. Soil samples were collected from ten 20 x 20 m plots set up in three contrasting habitats: the Acacia plantation, the adjacent heath forest, and the transition zone in-between. Soil samples were subjected to smoke and heat treatments, following which seedling emergence was observed daily over a 12-week period. In a parallel investigation, variations in species richness, seed density and seed viability of the soil seed banks of the ten plots were investigated. Seedling emergence was significantly highest in the plantation and lowest in the heath forest plots respectively. However, no significant differences among treatments, and no significant treatment-habitat interactions were detected. Species richness, seed density and seed viability in the plantation plots were significantly lower than the transition zone and intact heath forest plots. A. mangium seeds were not recorded in the heath forest soil seed banks but were detected in the plantation and transition zone plots. Lower native plant species richness, seed density and viability in the A. mangium plantation could imply higher regeneration potential for the heath forest habitat if severe habitat destruction was to occur in this forest reserve. We suggest that proper plantation management practices and close monitoring of soil seed banks are the best mechanisms that could be adopted to minimize the gradual spread of invasive Acacias into natural tropical heath forests of Borneo.
机译：我们在文莱达鲁萨兰国安杜劳森林保护区的马占相思种植园和邻近的热带荒地森林下比较了幼苗的出苗和土壤种子库的组成。从十个20 x 20 m的样地中收集土壤样品，该样地建立在三个相反的生境中：相思树人工林，相邻的荒地森林以及它们之间的过渡带。对土壤样品进行烟熏和热处理，然后在12周内每天观察到幼苗的出现。在平行调查中，研究了十个样地土壤种子库的物种丰富度，种子密度和种子生存力的变化。在人工林中，出苗率最高，而在荒地森林中，出苗率最低。然而，治疗之间没有显着差异，也没有检测到显着的治疗-栖息地相互作用。人工林地的物种丰富度，种子密度和种子生存力显着低于过渡区和完整的健康森林地。在健康的森林土壤种子库中未记录到A. mangium种子，但在人工林和过渡带中均发现了。如果在该森林保护区发生严重的栖息地破坏，那么芒。人工林较低的原生植物物种丰富度，种子密度和生存能力可能意味着健康森林栖息地的再生潜力更高。我们建议适当的人工林管理做法和对土壤种子库的密切监控是可以采用的最佳机制，以最大程度地减少相思树入侵婆罗洲天然热带荒地森林的蔓延。

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