Plant diversity indices for trojan fir stands in Aladağregion of Bolu

640 samples in quadrates of 0.5 x 0.5 m obtained by systematic sampling method were evaluated. Samplings were made in two repetitions in GA (old), GB (young), GC (medium-aged), and GD (irregular) stand types, on north and south aspects. Field studies were carried out in 4 different periods (June, July, August, September) within the vegetation period. 122 plant taxa were determined at the level of species and intraspecific taxa. While 48 of the 122 plant taxa in fir stands were seen only in one of the stands, 41 plant taxa were detected in all stands. 5 taxa were seen only in GA stands, 7 in GB, 15 in GC and 13 only in GD stands, while 8 taxa could not be identified due to the insufficient vegetative and generative organs of the collected samples. The richest stand type in terms of taxa number was determined as the GC stand type with 84 plant taxa, but more individuals per ha were counted in the GA and GD stand types.
Procijenjeno je 640 uzoraka 0,5x0,5 m dobivenih metodom sustavnog uzorkovanja. Uzorkovanje je obavljeno u dva ponavljanja u GA (staroj), GB (mladoj), GC (srednjedobnoj), GD (nepravilnoj) sastojini, na sjevernim i južnim izloženostima. Terenska istraživanja provedena su tijekom 4 različita razdoblja (lipanj, srpanj, kolovoz, rujan) unutar vegetacijskog razdoblja. Određene su 122 biljne svojte na razini vrsta i infraspecifičnih svojti. U samo jednoj sastojini jele zabilježeno je 48 biljnih svojti, 41 svojta zabilježena je u svim sastojinama. 5 svojti biljaka viđeno je samo u GA sastojinama, 7 u GB, 15 u GC i 13 samo u GD sastojinama. Najbogatiji tip sastojine po broju svojti utvrđen je kao GC tip sastojine sa 84 biljne svojte, ali je više jedinki po ha izbrojano u GA i GD sastojinama.