Stand density had a weak impact on height, crown height, crown width, diameter and length of upper branches;

密度对上层木的树高、冠长、冠幅、树冠上层枝直径和枝长等的影响比较小；

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For each mangrove, identify and measure its position along the transect line, height, crown length, crown width.

辨认每一棵红树，并且量度它们的在样线上的位置，高度，树冠长度，树冠阔度。

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Objective: Statistical analysis of mandibular molar mesiodistal crown width and tooth length and development of root.

目的：统计分析下颌第一、第二、第三磨牙牙冠近远中宽度、牙体长度、分根情况以及相关因素。

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