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Ecological land classification and mapping based on vegetation-environment hierarchical analysis - a case study of Buldan forest district (Turkey)

100%

Ozkan K., Gulsoy S.

Polish Journal of Ecology

2010

tom 58

nr 1

Distinction of the geographic areas intended for hierarchical sequence of vegetation classes involves the hierarchical classification of ecosystems. In this context, it is essential to determine the effective environmental characteristics at each hierarchical level of vegetation distinction. The study was carried out in order to classify and hierarchical mapping the Buldan forest district (area 190,000 km², altitude 400–1400 m a.s.l. covered in 40% with Mediterranean pine and oak forest, in 60% – by arable and pasture land). 56 sample plots (20 m × 20 m) were taken. At each sample plot, environmental characteristics (56 variables) and vascular plant species (108 species in total) were recorded. The relationships between environmental variables and the distribution of plants (presence/absence) were investigated by two hierarchical approaches for both of floristic data matrix and environment matrix by using cluster analysis, stepwise discriminate analysis and chi square test. Interspecific correlation analysis was also applied to determine the indicator species at each level of divisions. Two subdistricts were distinguised: Ortakcı-Cagir subdistrict (characteristic species association with Pinus brutia, Pistacia terebinthus, Nerium oleander, Ficus carica, Olea europea) and Suleymanli subdistrict (species association with Pinus nigra, Cistus laurifolius, Prunus divarcata and Rosa canina). Two sections in Suleymanli subdistrict were distinguished: Kocaalan section with characteristic association of Pinus nigra, Cistus laurifolius, Drypteris pallida and Ericek section – characterized with an association of Creategus monogina, Astragalus sp. and Pistacia terebintus. The altitude was the fundamental variable affecting on site classification at the level of subdistrict. Longitude was the most important variable affecting on discrimination of the sections of Suleymanli subdistrict. This local study offers a model including statistical processes which can be applied to the other forest areas for large scale classification of vegetation and environmental relations. Application of this model based on hierarchical classification of ecosystem units is also important for estimation of the changes of natural vegetation in ecosystems in the future due to global climatic change.

Potential distribution modeling and mapping of brutian pine stands in the inner parts of the middle Black Sea Region in Turkey

80%

Senturk O., Gulsoy S., Tumer I.

Polish Journal of Environmental Studies

2019

tom 28

nr 1

Brutian pine (Pinus brutia Ten.) is one of the most common and precious coniferous tree species in Turkey. Except for its main distribution areas such as the Mediterranean and Aegean regions, brutian pine can be found in isolated areas due to its different forest site factors. Therefore, our aim was to obtain a model and map of this species in the Aydınca District, which is one of these isolated areas. For these purposes, the presence or absence of data of target species was collected from 453 sample plots. Environmental variables – including elevation, slope, heat index, topographic position index, slope position, bedrock types, BIO1, and BIO12 – were selected for generating a model and map of brutian pine via the generalized additive model. The model and map show that BIO1, BIO12, elevation, heat index, and bedrock were the most important explanatory variables. As a result of the obtained model, potential distribution of brutian pine was determined to range from 400 to 806 m elevation. In addition to this result, climate conditions for brutian pine were areas where the annual mean temperature was 11-12.5°C and annual mean precipitation was 428-439 mm. Besides, more suitable areas for brutian pine occurred where the heat index values are higher. Finally, brutian pine preferred limestone, schist, and other bedrock types in the district. In this study especially, climatic features that depend on elevation showed significant influence on potential distribution of brutian pine in Aydınca.

Ograniczanie wyników

1 Polish Journal of Ecology

1 Polish Journal of Environmental Studies

2 Gulsoy S.

1 Ozkan K.

1 Senturk O.

1 Tumer I.

1 2019

1 2010

Wyniki wyszukiwania

Ecological land classification and mapping based on vegetation-environment hierarchical analysis - a case study of Buldan forest district (Turkey)

Potential distribution modeling and mapping of brutian pine stands in the inner parts of the middle Black Sea Region in Turkey