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首页> 外文期刊>Marine biology >Conservation genetics of Lumnitzera littorea (Combretaceae), an endangered mangrove, from the Indo-West Pacific
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Conservation genetics of Lumnitzera littorea (Combretaceae), an endangered mangrove, from the Indo-West Pacific

机译：来自印度西部西太平洋的濒危红树林Lumnitzera littorea（Combretaceae）的保护遗传学

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摘要

Mangrove forests, with their ecological significance and economic benefits, are vital inter-tidal wetland ecosystems. Lumnitzera littorea (Combreata-ceae) is a non-viviparous mangrove distributed in tropical Asia and North Australia. Due to natural and human impacts, populations of this species have been isolated, fragmented, and highly disturbed. In China, L. littorea is an endangered species, restricted to small regions of Hainan Island. The genetic composition of five populations of this species from the Indo-West Pacific (South China, Malay Peninsula, Sri Lanka, North Australia) was assessed using inter simple sequence repeat (ISSR) makers. At the species level, expected mean heterozygosity (He) was 0.240 with 75.6% of loci polymorphic (P). However, genetic variation was much lower at the population level (P = 37.1%, He = 0.118). A high coefficient of gene differentiation (Gst = 0.515) and low level of gene flow (Nm = 0.470) indicated significant genetic differentiation among populations. AMOVA also indicated that more than half the total variation (58.4%) was partitioned among populations. The high degree of differentiation observed among populations emphasizes the need for appropriate conservation measures that incorporate additional populations into protected areas, and achieve the restoration of separate, degraded populations.
机译：红树林具有其生态意义和经济利益，是重要的潮间带湿地生态系统。 Lumnitzera littorea（Combreata-ceae）是分布于热带亚洲和北澳大利亚的无生命红树林。由于自然和人类的影响，该物种的种群已被隔离，破碎和受到高度干扰。在中国，L。littorea是一种濒危物种，仅限于海南岛的小区域。使用简单序列重复（ISSR）标记仪评估了印度西部西太平洋（华南，马来半岛，斯里兰卡，北澳大利亚）该物种五个种群的遗传组成。在物种水平上，预期平均杂合度（He）为0.240，具有75.6％的基因座多态性（P）。然而，在人群水平上的遗传变异要低得多（P = 37.1％，He = 0.118）。高的基因分化系数（Gst = 0.515）和低水平的基因流（Nm = 0.470）表明人群之间存在显着的遗传分化。 AMOVA还表明，总变异的一半以上（58.4％）被分配在各个种群之间。人口之间的高度分化强调了采取适当的养护措施的必要性，这些措施应将更多的人口纳入保护区，并实现单独的退化人口的恢复。

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