Floristic composition and environmental factors that characterize some grasslands in the Danube Delta area
Ključne besede:
Delta Donave, floristična sestava, travišča, okoljske spremenljivkePovzetek
Namen študije je bil raziskati floristično sestavo 12 pašnikov v delti Donave in sosednjih območjih ter analizirati razmerja med floristično sestavo in okoljskimi spremenljivkami. Vegetacijska analiza je bila izvedena na podlagi srednjih odstotnih vrednosti, ki ustrezajo lestvici, razviti po Braun-Blanquetovi lestvici - pokritost-številčnost. Za sintaksonomsko razporeditev je bilo uporabljenih 50 fitocenoloških relevej. Klasifikacija vegetacije je bila izvedena s hierarhičnim aglomerativnim združevanjem v skupine z uporabo prilagodljivega algoritma β in različnosti Bray-Curtis. Razmerje med floristično sestavo in okoljskimi spremenljivkami je bilo ocenjeno z uporabo Korespondenčna analiza detrenda (DCA) in kanonične korelacijske analize (CCA) v CANOCO. Kolinearnost med spremenljivkami je bila določena s faktorjem inflacije variance (VIF). Rezultati študije so pokazali identifikacijo petih tipov rastlinskih združb z analizo grozdov. Koncentracije humusa in skupnega fosforja so pomembno vplivale na model porazdelitve floristične sestave.
Prenosi
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