VariableName VariableType Description Example FileName StudyID String Unique identifier of the data source, either from articles or unpublished individual body size datasets SourceID_01 SizeAcross_DataSource.txt, SizeAcross_Sample.txt, SizeAcross_Size.txt Reference String Citation of the study Evans et al. 2022 SizeAcross_DataSource.txt Journal String Names of the journal when data has already been published CORAL REEFS SizeAcross_DataSource.txt PublicationYear Numeric Year of publication 2017 SizeAcross_DataSource.txt DOI String Digital Object Identifier (DOI) when data has already been published. Otherwise, add NA 10.1002/lno.11613 SizeAcross_DataSource.txt SiteID String Unique identifier of the local site SiteID_01 SizeAcross_Sample.txt, SizeAcross_Size.txt GeographicalLatitude Numeric Latitude of the sampling site in decimal degrees 54,617 SizeAcross_Sample.txt GeographicalLongitude Numeric Longitude of the sampling site in decimal degrees -113,618 SizeAcross_Sample.txt Hemisphere String Name of the Hemisphere North SizeAcross_Sample.txt Realms String Classification of the biogeographic realms Palearctic SizeAcross_Sample.txt GeographicalTerritory String Name of the main continents, oceans and seas Europe SizeAcross_Sample.txt GeographicalTerritory2 String Name of the country and sea located within an ocean Spain SizeAcross_Sample.txt Habitat String "Type of habitat: ""Marine"", ""Freshwater"", or ""Brackish""" Freshwater SizeAcross_Sample.txt HabitatSpecification String "Type of habitat: ""Lentic"", ""Lotic"", ""Marine"" or ""Brackish""" Lentic SizeAcross_Sample.txt Ecosystem String Type of ecosystem Stream SizeAcross_Sample.txt StudyContext String Main contexts in which the study was conducted (Table 1) Natural habitat heterogeneity SizeAcross_Sample.txt BiologicalOrganisation String Community (e.g. only fish) or Food web (e.g. invertebrate and fish) Community SizeAcross_Sample.txt SpeciesType String Name of the taxonomic group studied (i.e., primary producer, bacteria, protozoan, macroinvertebrate, zooplankton, fish) Macroinvertebrate SizeAcross_Sample.txt SamplingMethodology String General method used to collect data (e.g. electrofishing, accoustic, plankton net, Seine net, Ekman dredge, etc...). Ekman dredge SizeAcross_Sample.txt SampleID String Unique identifier of the size spectrum (or single entry) SampleID_1 SizeAcross_Size.txt NumSampled Numeric The number of times that sites were sampled 1 SizeAcross_Size.txt SamplingYear Numeric Year when data was collected 1986 SizeAcross_Size.txt SamplingMonth String Month when data was collected. Sometimes multiple months were considered to build the size spectra May-Jun-Jul-Aug-Sep SizeAcross_Size.txt NumberSizeSpectrumMethods Numeric Number of size spectrum methods used to fit the data 1 SizeAcross_Size.txt SizeSpectrumMethod String Type of size spectrum methodology used to fit the data Biomass spectrum (linear) SizeAcross_Size.txt YaxisParameterType String Type of variable in the Y-axis (abundance or biomass or biomass concentration or density) density SizeAcross_Size.txt YaxisParameterTypeSpecification String Additional information of the Y-axis regarding if the information explicitly mention that contains carbon or not density SizeAcross_Size.txt XaxisParameterType String Type of body size used (body mass or physical size) body mass SizeAcross_Size.txt XaxisParameterTypeSpecification String Additional information of the X-axis (body length or body mass or body mass carbon or body volume) body mass SizeAcross_Size.txt YaxisParameterUnit String Unit used in the Y-axis g/m2 SizeAcross_Size.txt XaxisParameterUnit String Unit used in the X-axis g SizeAcross_Size.txt XaxisParameterUnitSpecification String Additional information of the unit of the X-axis (e.g., dry or wet mass) g SizeAcross_Size.txt XaxisDimension String Dimensionality of the body size 1D or 3D SizeAcross_Size.txt NumberSizeClasses Numeric Number of size classes used to fit the size spectrum model 52 SizeAcross_Size.txt SizeRangeMinimum Numeric/String Minimum size used in the first size class 0,031 SizeAcross_Size.txt SizeRangeMaximum Numeric/String Maximum size used in the last size class 31,62 SizeAcross_Size.txt Slope Numeric Value of the size spectrum slope parameter -0,42 SizeAcross_Size.txt SlopeConfIntLow Numeric Value of the lower limit of the confident interval of the slope -0,57 SizeAcross_Size.txt SlopeConfIntUp Numeric Value of the lower upper of the confident interval of the slope -0,27 SizeAcross_Size.txt SlopeSD Numeric Value of the standard deviation of the slope 0,15 SizeAcross_Size.txt SlopeSE Numeric Value of the standard error of the slope 0,11 SizeAcross_Size.txt Intercept Numeric Value of the size spectrum intercept parameter -1,99 SizeAcross_Size.txt InterceptConfIntLow Numeric Value of the lower limit of the confident interval of the intercept -2,11 SizeAcross_Size.txt InterceptConfIntUp Numeric Value of the lower upper of the confident interval of the intercept -1,87 SizeAcross_Size.txt InterceptSD Numeric Value of the standard deviation of the intercept 0,12 SizeAcross_Size.txt InterceptSE Numeric Value of the standard error of the intercept 0,25 SizeAcross_Size.txt Linearity Numeric Value of the size spectrum linearity parameter 0,139 SizeAcross_Size.txt