  We derive an $n$-resolved Master equation for quantum transport that includes
a dependence on the number $n$ of tunneled electrons in system parameters such
as tunnel rates and energy levels. We apply the formalism to describe dynamical
changes due to random backaction effects, for example due to local fluctuations
of the electrostatic landscape during the transport process. We quantify the
amount of additional noise on top of electron shot noise due to these
fluctuations by giving explicit expressions both for sequential and coherent
tunneling examples.
