This data paper introduces a data set of quantitative records, including biomass (wet and dry weight), cover, shoot density and shoot length, of habitat‐forming seaweeds (temperate kelps and fucoids) collected at 400 sites (2,115 sampling points) of a warm‐to‐cold temperate zone of the Japanese coast from 1957 to 2013. The data set includes 8,885 occurrence records of 58 species, extracted from 64 literature sources, most of which were written in local language. The data set compiled the quantitative records of seaweeds at each study site, each year and each month; the geographical location; the vertical distribution and the scientific names. Furthermore, one supporting data set was added that included the name of the corresponding literature list. The data set was formatted as Darwin Core and its extension, “Sample‐based Data.” Scientific names were updated to ones that are currently accepted based on Algaebase (http://www.algaebase.org). A comprehensive distribution (presence and absence) data set of Japanese habitat‐forming seaweeds has been published (Kumagai et al., 2016, Ecological Research 31:759), which covers geographic distribution and the associated long‐term changes in seaweeds found in Japanese temperate and subtropical zones. Here, this data set focuses more on changes in seaweed quantity according to season and depth. This rich data set can be used to analyze the seasonal, long‐term changes and spatial differences in the biomass and community structure of habitat‐forming seaweeds along the Japanese coast. These datasets are published under a Creative Commons attribution license CC‐BY NC 4.0 (https://creativecommons.org/licenses/by-nc/4.0/).

中文翻译：

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在日本温带和亚热带地区（岩藻类和海带）中发现的形成栖息地的海藻的定量记录

本数据文件介绍了一组定量记录的数据集，包括生物量（湿重和干重），覆盖率，枝条密度和枝条长度，这些数据是在一个定居点的400个地点（2,115个采样点）收集的形成栖息地的海藻（温带海藻和岩藻类）的数量。 1957年至2013年日本沿海的温热至冷温带。该数据集包括从64种文献资料中提取的58种8885种发生记录，其中大多数是用当地语言编写的。该数据集汇编了每个研究地点，每年和每月的海藻定量记录；地理位置；垂直分布和科学名称。此外，增加了一个支持数据集，其中包括相应文献清单的名称。数据集被格式化为Darwin Core及其扩展名“基于样本的数据”。”科学名称已更新为基于Algaebase（http://www.algaebase.org）的当前可接受的名称。已经发布了日本生境形成海藻的全面分布（存在与否）数据集（Kumagai等人，2016，Economic Research 31：759），涵盖了日本人发现的海藻的地理分布和相关的长期变化温带和亚热带地区。在此，此数据集更多地关注根据季节和深度的海藻数量变化。该丰富的数据集可用于分析日本沿海形成海藻的生物量和群落结构的季节性，长期变化和空间差异。这些数据集是根据知识共享署名许可CC‐BY NC 4.0（https://creativecommons.org/licenses/by-nc/4.0/）发布的。