DIGITALNA ARHIVA ŠUMARSKOG LISTA
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ŠUMARSKI LIST 9-10/2002 str. 34 <-- 34 --> PDF |
A. Čami, J. Franjić & Ž. Skvorc: VEGETACIJA GRMASTIH ŠUMSKIH RUBOVA U SLAVONIJI ... optimum just there on the very forest edge and can be found only sporadically inside a canopied forest stand. The shrub associations on the forest edge are very important for forest protection against the wind, by reducing its force and by changing its direction, and at the same time they keep moisture and precipitation and reduce pollution of the environment. The shrub species are also very important in fighting erosion, so they are used in the development of various surfaces obtained after the construction of roads, railway lines, transmission lines, etc. In that, special attention must be paid to plant autochthonous shrub species whenever possible, which will fit better in the environment and in some places will present and form a succession stage toward the forest. So far the forest edge shrub associations have not been researched much in Croatia. Thus, Horvat (1962) researches the forest edges and describes the associations Corno-Ligustretum croaticum awt/Berberidi-Rhamnetum fallacis. However, in the work no releves or tables are given (cf Barkman etal. 1986, Art. 7). Later, the table was published (Horvat et al. 1974), but the name with the geographical indication Corno-Ligustretum croaticum was chosen, that is not in compliance with Code (cf. Barkman et al. 1986, Art. 2c). This association with three releves was renamed by Trinajstić & Zi. Pavletić (1991) who designated it by the name of Corno-Ligustretum, however they did not determine the nomenclatural type (cf. Barkman et al. 1986, Def 8), namely they did not refer to the description of the association Corno-Ligustretum croaticum (Horvat et al. 1974; Barkman et al. 1986, Art. 2b). In the further analysis it will be necessary to determine the resemblance of this association to the association Ostryo-Cornetum sanguineae Čami 1997, which was described in the south-eastern Slovenia (Čami 1997). The research of the shrub forest edges was carried out in June and July 2001 in Central Slavonia in the vicinity of the villages Musić, Levanjska Varoš, Slobodna Vlast, Ovčara, Hrkanovci, Majar (near Đakovo) and Djedina Rijeka, Imbrijevci, Paka (near Požega), (Fig. 2). A total of 10 releves was made (Tab. 1). Consequently, the researched forest edge shrub vegetation in Slavonia can be divided into two groups, namely into the group with the mixed species of classes Salicetaea purpuraea and Rhamno-Prunetea (Tab. 1, releves 1-8), which we included in the alliance Šalici cinereae-Viburnenion (Pas. 1964) de Foucault 1991, and into the group where dominant are the species of class Rhamno-Prunetea (Tab. 1, releves 9-10), which we included in the alliance Prunion fruticoae Tiixen 1952. The research was made in compliance with the standard Central European method (Braun-BIanquet 1964). On all releves two numerical analysis methods were carried out - the cluster analysis and the multidimensional scaling. According to the floristical (Tab. 1) and numerical (Fig. 1) analyses, we decided to divide the releves in two associations inside which dominant is the subspecies Prunus spinosa L. ssp. dasyphylla (Schur.) Do min. One association occurs in thermophilous habitats and is known under the name of Crataego-Prunetum dasyphyllae Jurko 1964 (releves 9 and 10). The second association occurs on more humid habitats with another combination of species and presents a new association designated by the name Viburno opuli-Prunetum dasyphyllae Čami, Franjić et Škvorc 2002 (releves 1-8). Šumarski list br. 9 10. CXXVI (2002). 459-468 |