Environmental, oceanographic and fisheries strategy time series (2000-2019) for demersal species in the Brazilian Meridional Margin@en

The 'Mean Temperature of Catch (MTC)' was estimated for each year of the time series, as proposed by Cheung et al. (2013). This variable is expressed in degrees Celsius. 'Sea Bottom Temperature (SBT)' was derived from estimates provided by the high-resolution ocean general circulation INALT20 model (Schwarzkopf et al., 2019) for the study period (2000-2019) and was calculated by averaging the temperatures over 0.25° x 0.25° grid cells of the BMM and a water column up to 50 m above the seafloor. This variable is expressed is degrees Celsius. 'Annual volume transports of the Brazil-Malvinas confluence (BCt)' was extracted and compiled from Artana et al. (2019). This index was estimated for the period between 2000 and 2017. More detailed information about this index can be accessed in Artana et al. (2019). This variable expressed in Sverdrups (Sv). 'Simpson diversity index (Dm)' express the diversity of demersal fishing métiers (i.e. combination of target species, gear, and time of the year) operating each year of the time series, as determined by a process of classification of individual fishing trips. Catches of each métier operating during each year of time series summed and used to calculate Dm using the Simpson species diversity index formulation.渔获平均温度（Mean Temperature of Catch, MTC）：按照Cheung等人（2013）提出的方法，对时间序列中的每一年进行估算，单位为摄氏度。海底温度（Sea Bottom Temperature, SBT）：源自高分辨率海洋环流模式INALT20（Schwarzkopf等，2019）在2000-2019年研究时段内的估算结果，通过对BMM区域0.25°×0.25°网格单元以及海底上方50米水柱的水温取平均计算得到，单位为摄氏度。巴西-马尔维纳斯汇流区年体积输送量（Annual volume transports of the Brazil-Malvinas confluence, BCt）：从Artana等（2019）提取并汇编得到，估算时段为2000-2017年，该指数的详细信息可参考Artana等（2019），单位为斯维尔德鲁普（Sverdrups, Sv）。辛普森多样性指数（Simpson diversity index, Dm）：用于表征时间序列各年份开展的底栖渔业作业类型（即目标物种、作业渔具与作业季节的组合）的多样性，该指数通过对单次渔业航次的分类流程确定。将时间序列各年份各作业类型的渔获量求和后，采用辛普森物种多样性指数公式计算得到Dm。