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Assessing the biomass and distribution of submerged aquatic vegetation using multibeam echo sounding in Lake Towada, Japan

机译：利用多束回波测深法评估日本十和田湖的水下生物植被的生物量和分布

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Here we report on an advanced survey system that combines multibeam echo sounding with underwater photography, which was used to collect accurate data on the distribution and abundance of submerged aquatic vegetation (SAV) in Lake Towada. The use of this system enabled us to visualize the cover, height, and biomass of the SAV over the lake bottom, as well as to distinguish between different components of the SAV such as vascular and algal plants. The spatial distributions of these major components of the SAV varied as a function of the depth gradient. The vascular component was mostly represented by Potamogeton species, which accounted for around one-third of the standing mass of SAV, whilst more than half of the SAV was algal (charophytes). This abundance of charophytes may well be responsible for the high water quality and transparency of Lake Towada.
机译：在这里，我们报告了一种先进的测量系统，该系统将多束回声测深与水下摄影相结合，用于收集十和田湖中水下水生植物（SAV）的分布和丰度的准确数据。使用该系统使我们能够可视化SAV在湖底的覆盖度，高度和生物量，并可以区分SAV的不同组成部分，例如维管植物和藻类植物。 SAV的这些主要成分的空间分布随深度梯度而变化。血管成分主要由Potamogeton种类代表，约占SAV站立质量的三分之一，而SAV的一半以上是藻类（生叶藻）。丰富的藻土可能是十和田湖高水质和透明性的原因。

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