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首页> 外文期刊>Aquatic Botany >Clonal diversity and structure related to habitat of the marine angiosperm Thalassia testudinum along the Atlantic coast of Mexico
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Clonal diversity and structure related to habitat of the marine angiosperm Thalassia testudinum along the Atlantic coast of Mexico

机译：墨西哥大西洋沿岸海洋被子植物地中海生藻的生境相关的克隆多样性和结构

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摘要

The clonal structure of the tropical seagrass Thalassia testudinum was studied at 16 sites along the Mexican Atlantic coast, situated in back-reef, shallow coastal and lagoon habitats. Thalassia testudinum was highly clonal, with an overall average clonal richness (R) of 0.55. The largest genet found in this study extended throughout the sampling area (similar to 230 m), with an estimated max age almost reaching 600 years. Lagoons with higher nutrient availability reflected by nutrient content of leaves (mean leaf C:N ratio 11.4) and lower hydrodynamic regimes reflected by the percentage of fine sediments (on average 23%), sustained larger genets of T. testudinum (mean of the largest genets over populations was 167.3 m) than the shallow coastal areas (C:N 12.3, 6.2% fine sediment, mean largest genet 10.3 m) and the more oligotrophic back-reefs (C:N 16.3, 2.7% fine sediment, mean largest genet 6.5 m). Population genetic analysis showed different levels of clonality, genotypic diversity and spatial genetic relatedness for this seagrass per habitat, with the lagoons presenting Much lower levels of clonal diversity than the other two habitats.
机译：在墨西哥大西洋沿岸的16个地点研究了热带海草Thalassia testudinum的克隆结构，该地点位于礁石，浅海和泻湖栖息地。塔拉斯夜蛾是高度克隆的，总体平均克隆丰富度（R）为0.55。在这项研究中发现的最大种系延伸到整个采样区域（大约230 m），估计最大年龄接近600岁。具有较高养分利用率的泻湖由叶片养分含量（平均叶片碳氮比为11.4）反映出来，而由较细的沉积物所占比例（平均23％）反映出较低的水动力状况，则可以持续繁殖较大的三角睾丸（最大的平均值）。人口上的种系比浅海沿海地区（C：N 12.3，细沉积物为6.2％，平均最大种质为10.3 m）高167.3 m），而富营养化的后礁（C：N 16.3，细种沉积物为2.7％，平均最大属性高礁） 6.5 m）。种群遗传学分析显示，每个生境的这种海草的克隆性，基因型多样性和空间遗传相关性不同，泻湖的克隆多样性水平比其他两个生境低得多。

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