/usr/share/man/man1/NAST-iEr.1.gz is in microbiomeutil 20101212+dfsg1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man1/nast-ier.1.gz
/usr/share/man/man1/nast-ier.1.gz