Model projection of the effect of climate change and fishing pressure on key species of the South East Asia Seas

The dataset contain Projection from the Size-Spectra Bioclimatic Envelop Model (SS-DBEM), this work was part of the GCRF Blue communities Programme (www.blue-communities.org). The model provides distribution and abundance and/or biomass of fish and other species of commercial interest under climate change and fishing pressure. The model outputs are yearly abundance/biomass on a 0.5-by-0.5 degree grid, covering the period from 2000 to 2098. Further description of the model and relevant references are listed in the following file: Guide-fish-model-output-use.docx The model was run under two climate scenario: RCP4.5 and RCP8.5, with different combinations of fishing pressure expressed as the Maximum Sustainable Yield (MSY) for the following values: 0 (no fishing, climate change alone will cause variation in fish biomass), 1 (sustainable fishing), 2, 3 (overfishing), and, 4 (overfishing with destructive practice). The intent is not to reproduce current fishing level but to provide a range of scenarios with which the future of fisheries can be explored. We projected fish species that were identified as key in the South East Asia seas region by our regional partners.The full list is provided in document: Fish-list-modelguide.xlsx There are 4 zip files that contain the model outputs of in either abundance (number of fish) or biomass grams of fish) for the two climate scenario. For example Biomass-RCP45.zip will contain model outputs in biomass for projections under RCP4.5 and all MSY. within the zip files are .csv files of the outputs for each species under the 5 MSY (0 to 4), the individual file names identify the species (identified by a 6digit code), the output provided (abundance or biomass), the RCP (8.5 or 4.5), and the MSY (0, 1, 2, 3, or 4). For example the file labelled 600107-Abundance-rcp85-msy4.csv contains the outputs for species 600107 (Skipjack tuna, Katsuwonnus pelamis), as abundance, under RCP8.5 with MSY4. Headers indicate what is in each column (latitude, longitude and year). Note: some knowledge of Python, R, or a similar software is recommended to ensure easy of use.

本数据集包含尺寸谱生物气候包络模型（Size-Spectra Bioclimatic Envelop Model, SS-DBEM）的投影结果，本研究隶属于GCRF蓝色社区计划（网址：www.blue-communities.org）。该模型可模拟气候变化与捕捞压力作用下，鱼类及其他具有商业开发价值物种的空间分布、种群丰度及/或生物量。模型输出为2000年至2098年期间、分辨率0.5×0.5度的网格单元上的年际丰度与生物量数据。模型及相关参考文献的详细说明详见文件Guide-fish-model-output-use.docx。模型基于两种典型浓度路径（Representative Concentration Pathway，简称RCP）情景——RCP4.5与RCP8.5开展运行，捕捞压力以最大可持续产量（Maximum Sustainable Yield, MSY）作为表征指标，共设置5组取值：0（无捕捞，仅气候变化会引发鱼类生物量变化）、1（可持续捕捞）、2、3（过度捕捞）以及4（破坏性过度捕捞）。本研究的初衷并非复刻当前实际捕捞水平，而是通过构建一系列情景以探索渔业的未来发展路径。我们针对区域合作伙伴认定的东南亚海域关键鱼类物种开展了投影分析，完整物种列表详见文档Fish-list-modelguide.xlsx。本次共提供4个压缩包，分别包含两种RCP情景下的模型输出数据，数据类型为鱼类丰度（种群数量）或生物量（单位：克）。例如，压缩包Biomass-RCP45.zip包含RCP4.5情景下所有MSY组合的生物量投影模型输出结果。每个压缩包内包含各物种在5组MSY（0至4）下的输出CSV文件，单个文件名包含四类标识信息：物种6位代码、数据类型（丰度或生物量）、RCP情景（8.5或4.5）以及MSY取值（0、1、2、3或4）。例如，文件600107-Abundance-rcp85-msy4.csv对应物种600107（正鲣，*Katsuwonus pelamis*），其数据为丰度，基于RCP8.5情景与MSY=4的参数设置。文件头信息说明了各列内容：纬度、经度与年份。注：建议具备Python、R或同类数据分析软件的使用基础，以确保数据便捷调用与处理。