Species and habitats - Sprattus sprattus - All ages - IBTS annual abundance in summer (1991-2010)

Biologic data have been expressed in abundance (numbers or density values (nbr/km²)) and always required to be log-transformed using a log10(x+1) transformation.生物数据多以丰度形式表征，具体为数量或密度值（单位：个/平方千米，nbr/km²），且始终需采用log10(x+1)变换进行对数转换。