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Paper Received: Especially Crucial for Semi Natural Or Degraded Forest Ecosystems

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Paper Received: Especially Crucial for Semi Natural Or Degraded Forest Ecosystems 623 Journal Home page : www.jeb.co.in , E-mail : [email protected] JEB ISSN: 0254-8704 Journal of Environmental Biology CODEN: JEBIDP Hierarchical land classification and mapping of Aglasun Forest Ecosystems in the Mediterranean Region, Turkey Kursad Ozkan 1*, Ahmet Mert 2, Wim Aertsen 3 and Bart Muys 3 1Suleyman Demirel University, Faulty of Forestry, Department of Forest Engineering, 32260, Isparta, Turkey. 2Suleyman Demirel University, Faulty of Forestry, Department of Forest Management, 32260, Isparta, Turkey. 3Division Forest, Nature and Landscape, Katholieke Universiteit Leuven, Celestijnenlaan 200E Box 2411, BE-3001 Leuven, Belgium. *Corresponding Author email : [email protected] Abstract Publication Info Hierarchical Land Classification of forest ecosystems is an attempt to classify the territory considering hierarchical distinctions of plant communities. Ecological land classification is Paper received: especially crucial for semi natural or degraded forest ecosystems. In this study, a hierarchical land 19 August 2011 classification was generated for Aglasun forest ecosystems where urban and agricultural developments and non­stop human activity for fuel wood and timber have caused extensive Revised received: degradation to native plant communities. Data obtained from 153 sample plots consisting of environmental characteristics and vascular plant species were evaluated by using cluster analysis, 21 April 2012 stepwise discriminate analysis, and chi­square test. Interspesific correlation analysis was applied to define the indicator species at each distinction level. Two sections, two subsections and four Re-revised received: units were finally determined for the Aglasun forest district. The results of the stepwise discriminate 23 July 2012 analyses showed that the fundamental variables for classifying the district are altitude, exposition, latitude and longitude. Accepted: 07 August 2012 Key words Forest ecosystem, Hierarchical, Site classification, Mediterranean region Introduction A few significant studies have attempted concerning ecological land classification and mapping in different The main purpose of ecological land classification regions of Turkey. Ozkan and Gulsoy (2010) made an is to subdivide land into sub-units that are relatively ecological land classification based on a hierarchical homogeneous with respect to environmental factors. Plants sequence of vegetation in the Buldan district, Aegean are generally chosen as a responsible variable versus region. Whereas Altun et al. (2002) classified and mapped environmental factors for classifying terrestrial ecosystems the Research Forest of Forestry Faculty of Karadeniz because it can explain the ecological processes operating Technical University in the Black Sea region. Another study on a given site more measurably than the other factors. conducted the classification and mapping of the forests of Also vegetation measurements are easier and more reliable Genya Mountain in the same region (Altun et al., 2007). compared to fauna and it is essential component of energy flow in ecosystems. Early ecological land classifications With respect to the Mediterranean region, the first were often based on topographical contrasts. Recent studies study entitled “Regional Site Classification of Mediterranean on the ecological land classification have been often based region” was made by Kantarci (1991) and has attracted much on vegetation-environmental relationships (Velazquez, 1992; attention of foresters. The reason is that Mediterranean Cheng, 2001; Altun et al., 2002; Ozkan and Kantarci, 2008; forest ecosystems has a very important position due to Ozkan and Gulsoy, 2010). their species diversity, composition and complex structure. © Triveni Enterprises, Lucknow (India ) Journal of Environmental Biology, Vol. 34 , 623-633, May 2013 Journal of Environmental Biology , May 2013 624 K. Ozkan et al. One of the components of this complexity is the Ecological based classification and mapping of the heterogeneity of habitats, which influences the spatial Aglasun district will provide more detailed information and distribution of plant species. will increase our understanding about Aglasun forest ecosystems. The study will give fundamental information Kantarci (1991) classified regional subgroups, for sustainable forest management and applications subregions and districts for the Mediterranean region. But including restoration, afforestration, conservation, and the study didn’t involve subclasses for each subregion or utilization of the district ecosystems. district of the region. Moreover, after the study of Kantarci (1991), only one study entitled “Forest site properties and Materials and Methods classification in Beysehir watershed” was published at a Site description : Aglasun forest district (37° 33' N; 30° 32' district level for the Mediterranean region (Ozkan and E, 350-2200 m above sea level) is bounded on the West by Kantarci, 2009). There is clearly a need for much more Burdur and Burdur lake, in the East by Kovada channel, in detailed investigations about other subregions and districts the North by Isparta, in the South by Bucak and Kestel lake. of this region. The study area is about 55.000 ha in size. The area is characterised by different parent materials, among which, Aglasun district is located in Mediterranean region. limestone is most widespread, followed by conglomerate Vegetation-environment relationships were reported by and sandy clayey dusty deposits. Fontaine et al. (2007). In that study, as expected, altitude and aspect are the most controlled factors on vegetation Soil depth, moisture content and stoniness vary distribution. However, the study didn’t include ecological depending on altitude, slope degree and parent material. land classification and map-units of the district. Parent material is the most important factor affecting soil properties. Soils on limestone parent material are slightly Ecological land classification reflects potential undulated with levelled or bedded surfaces and weak zones distribution of vegetation communities due to the in the rugged and inclined surfaces. Generally, soils derived integration of abiotic and biotic ecosystem components on from limestone material are shallow. Whereas those derived a map (Banner and Meidinger, 1996). Portraying the potential from sandy, clayey or dusty deposits are generally deep to vegetation distribution on a map is one of the challenges of very deep and moreover less stony, less alkaline and moister. ecosystem planning. This information is especially crucial for degraded or semi natural ecosystems like the Aglasun Aglasun district is located in the transition zone, forest district. Mediterranean interior subregional group (Kantarci, 1991). The average annual temperature ranges from 11.7 to 12.1 ºC The hierarchical structure of vegetation communities with an irregular rainfall regime. The average annual should be considered in hierarchical ecological land precipitation ranges from 678 to 947 mm. The climate is semi classification (HELC) (Wright et al., 1998). One of the humid type. In other words, the climate prevailing in the approaches in HELC is based on binary distinctions of Aglasun district is transitional, with a long summer drought, vegetation communities. In this approach, vegetation data being mainly Mediterranean with an impact from the is firstly classified into two main subgroups. Then the continental (Fontaine et al., 2007). environmental factors affecting the different subgroups are determined and a potential distribution map of the About an area of 32250 ha equal to 52 % of Aglasun subgroups is generated considering these environmental district is covered by forest. The leading forest vegetation factors. The main subgroups are entitled habitat types. This of Aglasun district is pure and mixed forests composed of approach can be repeated for secondary and further Black pine ( Pinus nigra ssp . pallasiana ), Red pine ( Pinus distinctions of the generated habitat types (Ozkan and brutia Ten.), Taurus cedar ( Cedrus libani ), Oaks ( Quercus Gulsoy, 2010). sp.) and Juniper ( Juniperus sp.). The district has a long history of human settlement This study was addressed to generate a hierarchical and forest utilization, including individual selection and ecological land classification of the Aglasun district overgrazing (Vermoere et al., 2003), which declares the high considering binary distinctions of vegetation communities. soil loss amounts in most areas of the district (Hacisalihoglu Aglasun district is located in the South of Turkey and et al., 2010). covered by the characteristic tree species of the mountain Mediterranean forests (like Pinus brutia (Brutian pine), Field sampling and laboratory methods : The longitude Pinus nigra (Crimean pine), Juniperus exelsa (Crimean (LONGIT) and latitude (LATITU) of the sample plots was juniper), Cedrus libani (Lebanon cedar) and Quercus (Oak determined considering altitude (ALTUD), aspect (EXPOS), species). At the same time, it hosts many endemic species. slope degree (SLOPE), slope position (LANDPOS), parent Journal of Environmental Biology , May 2013 Hierarchical land classification of forest ecosystems 625 material ((limestone (LIMESTONE), conglomerate were examined and the border of subregions were formed (CONGLO), sandy clayey dusty deposits (SANDCLAY)) (Fig. 2). CS test was applied between the sample plots of the and surface stoniness (SURFSTON)). In total 153 sites were recognized groups according to sample plots in subdistricts
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