Carbon storage in important unprotected sites
We used the following procedure to estimate the carbon
storage in unprotected sites that are important for biodiversity.
Firstly, carbon storage in unprotected IBAs was
estimated based on the unprotected area of IBAs multiplied
by the mean carbon density for all IBAs. Secondly, we
extrapolated carbon storage to unprotected KBAs by
assuming that KBAs have the same carbon density as
IBAs. Thirdly, we extrapolated to include those countries
not having IBAs (excluding Antarctica) by assuming that
unprotected IBAs/KBAs have the same carbon density as
protected areas in these countries