DOI: 10.5061/dryad.nvx0k6dqd
title: Data from: Spatial scaling of beta diversity in the shallow marine fossil record

description: Beta diversity quantifies the spatial structuring of ecological
 communities and is a fundamental partition of biodiversity, central to
 understanding many macroecological phenomena in modern biology and
 paleobiology. Despite its common application in ecology, studies of beta
 diversity in the fossil record are limited, particularly at regional
 spatial scales that are important for understanding macroevolutionary
 processes. The spatial scaling of beta diversity in the fossil record is
 poorly understood, but has significant implications due to temporal
 variation in the spatial distribution of fossil collections and the large
 spatio-temporal scales typically employed. Here we test the spatial
 scaling of several common measures of beta diversity using the Cenozoic
 shallow marine molluscan fossil record of New Zealand, and derive a
 spatially standardized time series of beta diversity. To measure spatial
 scaling we use and compare grid cell occupancy based on an equal-area grid
 and summed minimum spanning tree length, both based on reconstructed
 paleocoordinates of fossil collections. We find that beta diversity is
 spatially dependent at local to regional scales, regardless of the metric
 or spatial scaling utilised, and that spatial standardization
 significantly changes apparent temporal trends of beta diversity and,
 therefore, inferences about processes driving diversity change.
description: Supplementary Figure 1 - Cenozoic fossil collection locality
 paleocoordinates for each time bin Supplementary Figure
 2 - Cenozoic additive (β<sub>Add</sub>) beta diversity plotted
 against summed MST length for each time bin
 Supplementary Figure 3 - Cenozoic multiplicative
 (β<sub>Whit</sub>) beta diversity plotted against summed MST
 length for each time bin Supplementary Figure
 4 - Cenozoic pairwise (β<sub>Sor</sub>,<sub>
 </sub>β<sub>Sim</sub> and β<sub>Nest</sub>)
 beta diversity plotted against summed MST length for each time
 bin Supplementary Figure 5 - Cenozoic multi-site
 (β<sub>MSor</sub>,<sub>
 </sub>β<sub>MSim</sub> and
 β<sub>MNest</sub>) beta diversity plotted against summed MST
 length with fitted logarithmic trendlines Supplementary
 Figure 6 - Cenozoic multi-site (β<sub>MSor</sub>,<sub>
 </sub>β<sub>MSim</sub> and
 β<sub>MNest</sub>) beta diversity plotted against grid cell
 occupancy with fitted logarithmic trendlines
 Supplementary Figure 7 - Cenozoic time series of spatially
 standardized (summed MST length and grid cell occupancy) multi-site beta
 diversity (β<sub>MSor</sub>, β<sub>MSim and
 </sub>β<sub>MNest</sub>)
 Supplementary Figure 8 - Plio-Pleistocene time series of
 spatially standardized (summed MST length and grid cell occupancy)
 multi-site beta diversity (β<sub>MSor</sub>, β<sub>MSim
 and </sub>β<sub>MNest</sub>)
 Supplementary Figure 9 - Cenozoic time series of multiplicative
 and additive beta diversity (β<sub>Whit</sub> and
 β<sub>Add</sub>) Supplementary Table 1 -
 Time bins used for measuring the spatial scaling of beta
 diversity Supplementary Table 2 - Equations and
 notations for measures of beta diversity adopted