2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/217615Let S be a non-exceptional oriented surface of finite type. We discuss the action of subgroups of the mapping class group of S on the CAT(0)-boundary of the completion of Teichmueller space with respect to the Weil-Petersson metric. We show that the set of invariant Borel probability measures for the Weil-Petersson flow on moduli space which are supported on closed orbits is dense in the space of invariant Borel probability measures.8 pages, 1 figureDynamical SystemsGeometric Topology37D40, 30F60, 20F67text