Pederasyon sa Nagkahiusang mga Mag-uuma nga Nanalipud ug Nagpasig-uli sa Kinaiyahan (PENAGMANNAK) is a federation of seventeen peoples' organizations – self-help groups or cooperatives – working to conserve biodiversity in the Mt. Talinis area of Negro Oriental province. With their roots in the Mt. Talinis and Twin Lakes Biodiversity Conservation project (1996-1999), these groups' early activities included communal tree-farming and environmental awareness-raising.
Since the Mt. Talinis-Twin Lakes area gained protected status in 2000, the groups' work has focused on the development of an area management plan, which has outlined policies for the management of the 15,287-hectare area and delineated land use zones. The role of the federation has been to improve the management capacity of these groups, and to facilitate the development of sustainable livelihoods through including micro-lending, livestock dispersal, and organic fertilizer production, among other activities.