This package contains the data, statistical analysis, and figures used in the production of a manuscript about the spatial patterns of biodiversity change in 9 marine regions. Here I consider "biodiversity" to be species richness; specifically, regional species richness. Each of the nine regions contains many sites (between 20 and 200, e.g.). Previously, I've found that over the long-term (20-40 yrs), species richness is increasing or ~net stable in these regions. Changes in species richness are due to colonizations and extinctions. To better understand these documented changes in richness, this package/ paper looks at where these colonization/ extinction events occur. Species tend to be geographically rare (occupying few sites within a region) just after they colonize, or just before they go extinct. Therefore, for any one (col/ext) event, few sites are involved. However, if we look at the locations of these events over time and across species, are the events randomly distributed through space, or do they cluster? Does the location where a species went extinct tend to be near or far from the site where it first colonized? These analyses answer those questions.
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