Rad prikazuje prirodno širenje, formiranje pionirskih sastojina i brojnost prirodnog pomlatka u šumama munike. Istraživanje je provedeno u najzapadnijem dijelu prirodnog areala munike u Hercegovini na planini Čvrsnici, u neposrednoj blizini prirodnih negospodarenih sastojina. Prirodno širenje munike istraživano je kroz formiranje pionirskih sastojina na susjednim neobraslim površinama u razvojnim stadijima mlađeg pomlatka, mlađeg mladika, starijeg mladika i mlade sastojine. Proces prirodnog širenja munike napreduje progresivnom sukcesijom u pojasu naseljavanja i u svim razvojnim fazama. Istraživanje brojnosti i strukture mladog naraštaja definirano je evidentiranjem i razvrstavanjem po visinskim razinama za utvrđivanje mogućnosti prirodnog pomlađivanja sastojina munike u dobi i stadiju razvoja srednjodobne, starije i stare sastojine. Brojnost prirodnog pomlatka povećava se s dobi sastojine, tako da prosječna ukupna brojnost za sve sastojine iznosi 5. 812 kom/ha, dok prosječna ukupna brojnost prirodnog ponika za sve sastojine iznosi 757 kom/ha. Prosječna ukupna brojnost prirodnog ponika i pomlatka za sve sastojine iznosi 6.569 kom/ha. Brojnost prirodnog pomlatka važan je indikator mogućnosti prirodnog obnavljanja sastojina munike, ovisno o staništu, dobi i stadiju razvoja, te stupnju sklopa sastojine. Stare se sastojine munike i s prosječnim brojem prirodnog pomlatka mogu dobro prirodno pomlađivati, a rezultati ovog istraživanja daju pozitivnu spoznaju i polaznu osnovu za pravilan odnos prema ovim šumama.The paper presents natural spreading and forming pioneer stands and numerousness of natural new growth in whitebark pine forests. The research is carried out in westernmost part of natural area of the whitebark pine in Hercegovina on the mountain of Čvrsnica, nearby natural unmanagement stands. Natural spreading of the whitebark pine was researched through forming pioneer stands on nerby unforested area in development stage of the seedling plant, new growth, young corp and young stand. Process of natural spreading advance by progressive sucession in the colonisation rate zone and in all development phase. Researching of nuerousnes and structure of young generation, was defined with registration and distribution by height classes for finding possibility of natural regeneration of whitebark pine stands at the age and development stage of middleaged, mature and oldgrowth stand. Numerousness of natural new growth increse with the age of stand, so a total average numerousness for all stands is 5. 812 piece/ha, while a total average numerousness of natural seedling plants for all stands is 757 piece/ha.
A total average numerousness of natural seedling plants and new growth is 6. 569 piece/ha. Numerousness of natural new growth is important indicator of possibility of natural regeneration whitebark pine stands that depend on the site, the age and development stage and on a deegre of canopy cover, also. Oldgrowth stands of whitebark pine and with average number of natural new growth can have good natural regeneration. Results of this rerearch give us better knowledge and understandings about regular and quality relationship towards this tipes of the forest
