...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Molluscan Studies >Genetic erosion in the snail Littoraria subvittata (Reid, 1986) due to mangrove deforestation
【24h】

Genetic erosion in the snail Littoraria subvittata (Reid, 1986) due to mangrove deforestation

机译：由于红树林森林砍伐，蜗牛Littoraria subvittata（Reid，1986）遗传侵蚀

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

In tropical coastal ecosystems mangrove forests are important as feeding, spawning, breeding and nursery grounds for many marine species. High human population pressure in coastal areas has led to the loss and deterioration of mangrove habitats. Solar salt production can affect these habitats along the East African coast. Littorinid snails live on mangrove trees, forming an important component of the mangrove ecosystem and have been used as bioindicators of environmental health and community stress. Littoraria subvittata is the most abundant littorinid species in mangroves along the East African coast. Partial mitochondrial cytochrome oxidase subunit 1 (COI) gene sequences of 298 individuals were used to assess the impact of mangrove deforestation at salt ponds on the genetic diversity and structuring of L. subvittata populations, as well as to infer the demographic history of the species. Nucleotide and haplotype diversities were found to be lower in samples from mangroves at salt ponds than in samples from natural mangroves. The mean nucleotide diversity was 0.049 +/- 0.036% and 0.115 +/- 0.068% in mangroves at salt ponds and natural mangroves, respectively. The mean haplotype diversity was 0.23 +/- 0.14 and 0.50 +/- 0.14 in mangroves at salt ponds and natural mangroves, respectively. Analysis of molecular variance (AMOVA) detected a significant population structure (Phi(st) = 0.049; P 0.0001) for the combined populations. Hierarchical AMOVA detected a significant population genetic structure only between populations from mangroves at salt ponds and natural mangroves (Phi(ct) = 0.022; P 0.05), but not between any other groupings. Populations from natural mangrove sites showed a significant genetic structure (Phi(st) = 0.054, P 0.0001), while populations from sites at salt ponds could not be differentiated (Phi(st) = -0.0026, P = 0.64). Reduced effective population size was observed in most samples from mangrove sites at salt ponds compared with natural mangrove. The direction of migrants was mostly from salt ponds to natural mangroves. These results show that salt ponds have a negative impact on the genetic diversity of L. subvittata populations and modify the population's genetic structure.
机译：在热带沿海生态系统中，红树林森林对许多海洋物种的喂养，产卵，育种和苗圃来说都很重要。沿海地区的高人口压力导致红树林栖息地的损失和恶化。太阳能盐生产可以影响东非海岸的这些栖息地。 Littorinid蜗牛生活在红树林上，形成红树林生态系统的重要组成部分，被用作环境健康和社区压力的生物indicer。 Littoraria subvittata是东非海岸美洲红树林中最丰富的植物园。 298个个体的部分线粒体细胞色素氧化酶亚基1（COI）基因序列用于评估红树林森林砍伐在盐池对L. subvittata群体遗传多样性和结构的影响，以及推断物种的人口统计史。发现核苷酸和单倍型多样性在盐池中的红树林中的样品比来自自然红树林的样品更低。平均核苷酸多样性分别为0.049 +/- 0.036％和0.115 +/- 0.068％，分别在盐池和天然红树林中的红树林中。平均单倍型多样性分别为0.23 +/- 0.14和0.50 +/- 0.14，分别在盐池和天然红树林中的红树林中。分子方差分析（AMOVA）检测到合并群体的显着群体结构（PHI（ST）= 0.049; p＆ 0.0001）。分层Amova仅在盐池和天然红树林（PHI（CT）= 0.022; P <0.05）之间的种群之间仅在种群之间进行了群体遗传结构，但不在任何其他分组之间。来自天然红树林遗址的种群显示出显着的遗传结构（PHI（ST）= 0.054，P <0.0001），而来自盐池的位点的群体不能分化（PHI（ST）= -0.0026，P = 0.64）。与天然红树林相比，在红树林位点的大多数样本中观察到有效种群大小降低。移民的方向主要来自盐池到自然红树林。这些结果表明，盐池对L. subvittata群体的遗传多样性产生负面影响，并改变人口的遗传结构。

著录项

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号