"0","```r
# simple relationships with latitude and longitude
par(mfrow=c(2,2), mar=c(4,4,1,1)+0.1)
plot(H~site.longlats$Latitude, pch=16, xlab=\"Latitude\")
plot(S.obs~site.longlats$Latitude, pch=16, xlab=\"Latitude\")
plot(Simp~site.longlats$Latitude, pch=16, xlab=\"Latitude\")
plot(H_even~site.longlats$Latitude, pch=16, xlab=\"Latitude\")
par(mfrow=c(2,2), mar=c(4,4,1,1)+0.1)
plot(H~site.longlats$Longitude, pch=16, xlab=\"Longitude\")

plot(S.obs~site.longlats$Longitude, pch=16, xlab=\"Longitude\")
plot(Simp~site.longlats$Longitude, pch=16, xlab=\"Longitude\")
```"
"0","```r
plot(H_even~site.longlats$Longitude, pch=16, xlab=\"Longitude\")
```"
