ABSTRACT The relationship between stand attributes and biomass accumulation pattern in a mangrove forest has been intensively studied in this study. We assessed above (AGM) and belowground mass (BGM) and examined the relationship between forest attributes and aboveground mass in the Sundarbans, Bangladesh. The study was conducted with 18 plots having total area of 1.08 ha. The mean AGM and BGM of the study sites were 234.08 and 132.85 Mg ha−1 respectively. H. fomes contributed the highest amount (82.9% of total AGM and 80.53% of total BGM) of above (193.56 Mg ha−1) and belowground mass (107.09 Mg ha−1) at the study site. Our study revealed structural attributes (tree diameter, height, and basal area) positively correlated with AGM. In contrast, species richness and species diversity negatively correlated with AGM. Our study indicated that lack of positive relationship between species diversity and AGM which may be attributable to high AGM of the dominant species (H. fomes) and may have a considerable consequence in AGM of the study area. Thus, maintaining large trees (DBH and height) rather than species diversity in the Sundarbans mangrove forest might be an effective approach for increasing aboveground mass.

中文翻译：

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孟加拉国 Sundarbans 中等盐渍区地上和地下生物量的量化和理解：与森林属性的关系

摘要 本研究深入研究了红树林林分属性与生物量积累模式之间的关系。我们评估了上述 (AGM) 和地下质量 (BGM)，并检查了孟加拉国 Sundarbans 的森林属性与地上质量之间的关系。该研究是在 18 个地块中进行的，总面积为 1.08 公顷。研究地点的平均 AGM 和 BGM 分别为 234.08 和 132.85 Mg ha-1。H. fome 在研究地点贡献了最高的数量（总 AGM 的 82.9% 和总 BGM 的 80.53%），高于（193.56 Mg ha-1）和地下质量（107.09 Mg ha-1）。我们的研究揭示了与 AGM 正相关的结构属性（树木直径、高度和基面积）。相反，物种丰富度和物种多样性与 AGM 呈负相关。我们的研究表明，物种多样性与 AGM 之间缺乏正相关关系，这可能归因于优势物种（H. fome）的高 AGM，并可能对研究区的 AGM 产生相当大的影响。因此，在孙德尔本斯红树林中保持大树（胸径和高度）而不是物种多样性可能是增加地上质量的有效方法。