  An effective low energy Lagrangian density is applied to nuclear
$K^-$-dynamics. The free parameters, local s-wave couplings and SU(3)-symmetry
constrained range terms are adjusted to describe elastic and inelastic
$K^-$-nucleon scattering data. The propagation and decay of the
$\Lambda(1405)$-resonance and the $\Lambda(1405)$-nucleon hole state is studied
self consistently with respect to the $K^-$-propagation in isospin symmetric
nuclear matter.
