Gülen Özalp

DIVERSITY AND ECOLOGICAL DIFFERENTIATION OF OAK FORESTS IN NW THRACE (TURKEY)

Quercus robur, Q. frainetto, Q. cerris and Q. petraea that predominate in forests in the Thrace region, a bridge between the Balkans and Anatolia, were sampled, elaborated and classified. The ecological conditions were estimated by bio-indicator values. Oak forests can be divided into four groups: Q. robur-Fraxinus angustifolia forests thriving in floodplains, Q. petraea forests found at higher altitudes, Q. frainetto-Carpinus orientalis forests appearing in the warmest and driest sites and Q. frainetto forests on more humid sites. It was established that the most important topographic factor is altitude, while slope and aspect are of minor importance.

Diversity of Floodplain Forests in the Igneada Region (NW Thrace - Turkey)

Diversity of Floodplain Forests in the Igneada Region (NW Thrace - Turkey) The work deals with the floodplain forests of the Igneada region (NW Trace, Turkey). 69 relevés were sampled from wet to mesic sites according to the Braun-Blanquet approach and analyzed using different multivariate methods. The dataset was divided into five groups (associations), which demonstrate the diversity of forests in the region. In the wettest sites, forests dominated by Alnus glutinosa and Fraxinus angustifolia appear; on wet and nutrient rich sites along rivers there are forests dominated by Ulmus laevis and Fraxinus angustifolia; on wet and less nutrient rich sites Ulmus minor and Fraxinus angustifolia appear; on humid sites Fraxinus angustifolia and Carpinus betulus forests thrive and on mesic sites Carpinus betulus forests appear. The ecological conditions are estimated by bioindicator values and the gradient from wet and nutrient rich forests to mesic and nutrient poor forests is presented by numerical analysis. The species richness and geo-elemental structure for each community is evaluated. Finally, a syntaxonomical scheme is proposed and the following associations were determined Leucojo aestivi-Fraxinetum angustifoliae, Fraxino angustifoliae-Ulmetum laevis, Smilaco excelsae-Fraxinetum angustifoliae (Alno-Quercion roboris, Populetalia albae) and Geranio robertiani-Carpinetum betuli, Trachystemo orientalis-Carpinetum betuli (Castaneo-Carpinion betuli, Rhododendro pontici-Fagetalia orientalis) all within Querco-Fagetea. V delu obravnavamo vegetacijo poplavnih gozdov v Igneadi (SZ Trakija - Turčija). Opravili smo 69 popisov gozdov, ki se pojavljajo na mokrih, vlažnih in mezofilnih rastiščih. Gozdna vegetacija je razdeljena na pet skupin (asociacij), ki predstavljajo raznolikost teh gozdov v regiji. Na dobro namočenih rastiščih se pojavljajo gozdovi, kjer dominirata vrsti Alnus glutinosa in Fraxinus angustifolia; na mokrih in bogatih rastiščih najdemo gozdove vrst Ulmus laevis in Fraxinus angustifolia, na namočenih, vendar manj bogatih se pojavljajo gozdovi vrst Ulmus minor in Fraxinus angustifolia; na vlažnih rastiščih uspevajo gozdovi vrst Fraxinus angustifolia in Carpinus betulus, gozdovi vrste Carpinus betulus pa uspevajo na mezofilnih rastiščih. Ekološke razmere so bile opredeljene z bioindikatorskimi vrednostmi, gradient vlažnosti pa je predstavljen na podlagi numeričnih analiz. Primerjava obsega tudi bogastvo vrst različnih združb in njihovo geoelementno sestavo. Predlagana je tudi sintaskonomsko uvrstitev obravnavanih združb: Leucojo aestivi-Fraxinetum angustifoliae, Fraxino angustifoliae-Ulmetum laevis, Smilaco excelsae-Fraxinetum angustifoliae (Alno-Quercion roboris, Populetalia albae) in Geranio robertiani-Carpinetum betuli, Trachystemo orientalis-Carpinetum betuli (Castaneo-Carpinion betuli, Rhododendro pontici-Fagetalia orientalis) vse v okviru razreda Querco-Fagetea.