Tearing instability in Alfv\'en and kinetic-Alfv\'en turbulence
  Recently, it has been realized that magnetic plasma turbulence and magnetic
field reconnection are inherently related phenomena. Turbulent fluctuations
generate regions of a sheared magnetic field that become unstable to the
tearing instability and reconnection, thus modifying turbulence at the
corresponding scales. In this contribution, we give a brief discussion of some
recent results on tearing-mediated magnetic turbulence. We illustrate the main
ideas of this rapidly developing field of study by concentrating on two
important examples -- magnetohydrodynamic Alfv\'en turbulence and small-scale
kinetic-Alfv\'en turbulence. Due to various potential applications of these
phenomena in space physics and astrophysics, we specifically try not to
overload the text by heavy analytical derivations, but rather present a
qualitative discussion accessible to a non-expert in the theories of turbulence
and reconnection.
