论文部分内容阅读
根据样地调查所获得的基本数据 ,运用 Levin公式和百分率相似公式分别计测了湘西北蜡梅群落中 9个种群的生态位宽度、生态位相似性比例和它们之间的生态位重叠值。结果表明 ,生态位宽度从大到小依次为蜡梅、香叶树、八角枫、黄连木、崖花海桐、鸡仔木、利川润楠、珊瑚朴和樱桃。蜡梅与其他各种群的生态位相似性比例不高 ,生态位重叠值较低 ,说明它与其他种群之间对资源的竞争并不十分激烈 ,因而能够成为湘西北蜡梅群落中利用资源能力和生态适应性最强的优势种群 ,并在维持群落的物种多样性和相对稳定性中发挥重要作用。
Based on the basic data obtained from the sample survey, the niche breadth, the niche similarity and the niche overlap among 9 populations in Chimonanthus Chinensis community were measured by Levin formula and percentage similarity formula respectively. The results showed that the order of the niche breadth was Chimonanthus praecox, Gemma, Atractylodes lanceolata, Pistacia chinensis, Pittosporum konjac, Chickweed, Ichikawa, Coral and cherry. Chimonanthus chinensis and other groups showed low proportion of niche similarity and low niche overlap, which indicated that the competition between Chimonanthus praecox and other populations was not very fierce, which could make use of resources in Chimonanthus chinensis community Ability and ecological adaptability of the strongest dominant population, and maintain community species diversity and relative stability plays an important role.