بررسی جوامع گیاهی در رخساره های ژیومورفولوژیکی حوزه آبخیز نوژیان

‭The study area is located in south eastern of khorram abad in loerstan province. The total area covered by This study is approximtely ‬‮‭34000‬ ‭ha. rnuch of the area contain a mountain system between ‬‮‭3012-770‬ ‭m altitudes. The aim of this research was to identify the plant species. introducing thc flora, detremination of lite forms, and geographical distributicn in central part of the sorkhab region. for this purpose plant samples were collected from different parts of the area during three growing seasons between ‬‮‭2003-2001‬‭. The biological spectrum of the area was plotted by means of life forms results. the position of the region within iran's phyto geography classification was studied based on geographical distribution data and refereces. from total of ‬‮‭230‬ ‭species and subspecific taxa, ‬2 ‭fern, ‬‮‭51‬ ‭monocoty ledones and ‬‮‭177‬ ‭dicoty ledones were identified. Among ‬‮‭49‬ ‭fomilies represented in the area, the following had the highest number of species: Asteraceae, Liliaceae,Poaceae, Cruciferae and Legllminosae. ‬‮‭109‬ ‭species (‬‮‭4/47‬‭%) were endemics of irana-touranian region, ‬‮‭33‬ ‭species of tHe. were endemic of iran. Distribution of the following species is mainly limited to zagros area: onosma kotschyi, cOllsina khorramabadensis, Echinops endotrichus, vicia kotschyana, morrina pet'sica Dionysia hauss knechtii and Bunium lurestanicutn. therophytes, Geophytes and He.icryptophytes with ‬‮‭79‬ ‭species (‬‮‭35‬%), ‮‭56‬ ‭speeies (‬‮‭24‬‭%) and ‬‮‭40‬ ‭species (‬‮‭18‬‭%) were respectively the most frequent forms of the area. Key words: flora, life forms, chorotype, plant geoography, sorkhab, zagros mountains, Lorestan, Iran.‬

Keywords:

آب پخشان ها , زمین ریخت شناسی , پوشش گیاهی , گیاگان , نوژان , لرستان