Ormandan Step Kuşağına Geçiş Bölgesinin Bitki Çeşitliliğine Etki Eden Faktörler

Yıl 2020, Cilt: 6 Sayı: 2, 47 - 54, 30.12.2020

Figen Çakır

Öz

Kurak ve yarıkurak alanlarda nem yetersizliğinden kaynaklanan orman-step sınırı oluşmaktadır. Orman ile step arasında geçiş zonu olarak adlandırılan alanlar, hem orman hem de step özellikleri gösteren ekosistemlerdir. Çalışma kapsamında Çankırı iline bağlı Yapraklı ve Sarıkaya ilçelerinde, 3 adet transekt üzerinde 27 örnek alan alınmıştır. Araştırma alanı, kümeleme ve eğrisel uyum analizi sonucunda bitki türü içeriği bakımından orman, geçiş kuşağı ve step olarak üçe ayrılmıştır. Çeşitlilik indis değerleri en düşük orman alanlarında, en yüksek step formasyonuna dâhil alanlarda bulunmuştur. Ayrıca yapılan korelasyon analizine göre; bitki tür çeşitliliği ile yükselti ve meşcere kapalılığı arasında negatif, eğim ile pozitif korelasyon olduğu bulunmuştur. Sonuç olarak ormandan stebe geçiş zonunun bitki tür çeşitliliği; orman alanlarına göre yüksek, step alanlarına göre düşüktür. Bu durum araştırma alanındaki geçiş zonunun antropojen etkiler ile oluştuğunu ortaya koymaktadır.

Anahtar Kelimeler

Step, tür çeşitlliği, kümeleme, DCA, Shannon

Destekleyen Kurum

İstanbul Üniversitesi BAP

Proje Numarası

17745

Teşekkür

Bu makale Figen Çakır tarafından, Prof.Dr.Ferhat Bozkuş danışmanlığında, 2014 yılında tamamlanan doktora tezi çalışmasının bazı sonuçlarını içermektedir. Çalışma İstanbul Üniversitesi Bilimsel Araştırma ve Projeler Koordinasyon Birimi (BAP) 17745 numaralı proje ile desteklenmiştir.

Factors Affecting Plant Diversity in the Forest-Steppe Transitional Zone

Öz

A forest-steppe boundary is formed in arid and semi-arid areas due to lack of moisture. The areas between the forest and the steppe ecosystem are called transition zones and they are ecosystems with both forest and steppe characteristics. The study was conducted in Yapraklı and Sarıkaya districts of Çankırı province by monthly vegetation samples. As a result of the cluster and Detrended Corresponding Analyses, the study area was divided into three as forest, transition zone, and steppe in terms of plant species composition. Diversity index values were the lowest in forest areas and the highest in steppe formation. Besides, according to the correlation analysis, a negative correlation was found between plant species diversity with elevation and canopy closure, while a positive correlation with slope was found.

Anahtar Kelimeler

Steppe, species diversity, cluster, DCA, Shannon

Proje Numarası

17745

Kaynakça

• Allen, C.D., Breshears, D.D., 1998. Drought-induced shift of a forest–woodland ecotone: rapid landscape response to climate variation. Proceedings of the National Academy of Sciences, 95, 14839-14842.
• Anonim, 2011-2030. Ankara Orman Bölge Müdürlüğü, Çankırı Orman İşletme Müdürlüğü, Çankırı Orman İşletme Şefliği Fonksiyonel Amenajman Planı. In, Bolu.
• Braun-Blanquet, J., 1964. Pflanzensoziologie: grundzüge der vegetationskunde, Berlin: Akademie-Verlag. Churkina, G., Svirezhev, Y., 1995. Dynamics and forms of ecotone of under the impact of climatic change: mathematical approach. Journal of Biogeography, 565-569.
• Clements, F.E., 1905. Research methods in ecology. University Publishing Company.
• Çakır, F., 2014. Çankırı yöresi ormandan stebe geçiş zonundaki orman kuruluşları ve silvikültürel özellikleri. In, Fenbilimleri Enstitüsü. İstanbul Üniversitesi, İstanbul, p. 172.
• Çakır, F., Bozkuş, F., 2017. Çankırı Yöresi Ormandan Stebe Geçiş Kuşağındaki Meşcere Kuruluş Özellikleri. Anadolu Orman Araştırmaları Dergisi, 3, 111-121.
• Davis, P., 1965-1985. Flora of Turkey and the East Aegean Islands. Vol. 1-9.
• Davis, P.H., Cullen, J., Coode, M.J., 1988. Flora of Turkey: and the East Aegean Islands.(Supplement). Edinburgh University Press.
• Dezzeo, N., Chacón, N., Sanoja, E., Picón, G., 2004. Changes in soil properties and vegetation characteristics along a forest-savanna gradient in southern Venezuela. Forest ecology and management, 200, 183-193. Ellenberg, H., 1956. Grundlagen der Vegetationsgliederung: T. Aufgaben und Metoden der Vegtationskunde. Eugen Ulmer, Stuttgart.
• Enserink, M., 1997. Life on the edge: rainforest margins may spawn species. Science, 276, 1791-1792. Fahrig, L., 2003. Effects of habitat fragmentation on biodiversity. Annual Review of Ecology, Evolution, and Systematics, 487-515.
• Farina, A., 2006. Principles and methods in landscape ecology: towards a science of the landscape. Springer. Fontaine, M., Aerts, R., Özkan, K., Mert, A., Gülsoy, S., Süel, H., Waelkens, M., Muys, B., 2007. Elevation and exposition rather than soil types determine communities and site suitability in Mediterranean mountain forests of southern Anatolia, Turkey. Forest ecology and management, 247, 18-25.
• Fu, B., Liu, S., Ma, K., Zhu, Y., 2004. Relationships between soil characteristics, topography and plant diversity in a heterogeneous deciduous broad-leaved forest near Beijing, China. Plant and soil, 261, 47-54.
• Goldblum, D., Rigg, L., 2005. Tree growth response to climate change at the deciduous boreal forest ecotone, Ontario, Canada. Canadian Journal of Forest Research, 35, 2709-2718.
• Işık, D., Uğurlu, E., 2011. Bitki komünitelerinde beta çeşitlilik. Celal Bayar Üniversitesi Eğitim Fakültesi Dergisi, 1(1), 154-171. Manisa.
• Kimmins, J.P., 1997. Forest ecology: a foundation for sustainable management. Prentice-Hall Inc.
• Lavers, C., Field, R., 2006. A resource‐based conceptual model of plant diversity that reassesses causality in the productivity–diversity relationship. Global Ecology and Biogeography, 15, 213-224.
• Liu, H., Cui, H., Pott, R., Speier, M., 2000. Vegetation of the woodland‐steppe transition at the southeastern edge of the Inner Mongolian Plateau. Journal of Vegetation Science, 11, 525-532.
• Loehle, C., 2000. Forest ecotone response to climate change: sensitivity to temperature response functional forms. Canadian Journal of Forest Research, 30, 1632-1645.
• Maestre, F.T., 2004. On the importance of patch attributes, environmental factors and past human impacts as determinants of perennial plant species richness and diversity in Mediterranean semiarid steppes. Diversity and Distributions, 10, 21-29.
• Medinski, T., Mills, A., Esler, K., Schmiedel, U., Jürgens, N., 2010. Do soil properties constrain species richness? Insights from boundary line analysis across several biomes in south western Africa. Journal of Arid Environments, 74, 1052-1060.
• Myster, R.W., 2012. Ecotones between forest and grassland. Springer.
• Naeem, S., Bunker, D.E., Hector, A., Loreau, M., Perrings, C., 2009. Biodiversity, ecosystem functioning and human wellbeing. An ecological and economic perspective.
• Özkan, K., 2006. Beyşehir gölü havzası Çarıksaraylar yetişme ortamı yöreler grubunda fizyografik yetişme ortamı faktörleri ile ağaç ve çalı tür çesitliliği arasndaki ilişkiler Journal of Science and Technology, 7, 157-166.
• Özkan, K., 2009. Environmental factors as influencing vegetation communities in Acipayam district of Turkey. Journal of Environmental Biology, 30.
• Özkan, K., 2010. Küresel iklim değişim senaryoları (Global climate change scenerios). Orman Mühendisleri Odası Yayın Organı, ISSN 1301-3572. Ankara.
• Özkan, K., Gülsoy, S., 2010. Ecological land classification and mapping based on vegetation-environment hierarchical analysis- a case study of Buldan forest district(Turkey). Polish Journal of Ecology, 58, 55-67.
• Özkan, K., Suel, H., 2008. Endemic plant species in a karstic canyon (Mediterranean region, Turkey): Relation to relief and vegetation diversity. Polish Journal of Ecology, 56, 709-715.
• Risser, P.G., 1993. Ecotones at local to regional scales from around the world. Ecological Applications, 3, 367-368. Schilthuizen, M., 2000. Ecotone: speciation-prone. Trends in Ecology & Evolution, 15, 130-131.
• Seçmen, Ö., Gemici, Y., Görk, G., Bekat, L., Leblebici, E., 1998. Tohumlu bitkiler sistematiği.
• Shannon, C., Weaver, W., 1949. Mathematical theory of communication. University of Illinois Pres, Urbana. Simpson, E.H., 1949. Measurement of diversity. Nature.
• Smith, T.B., Wayne, R.K., Girman, D.J., Bruford, M.W., 1997. A role for ecotones in generating rainforest biodiversity. Science, 276, 1855-1857.
• Speziale, K.L., Ruggiero, A., Ezcurra, C., 2010. Plant species richness–environment relationships across the Subantarctic–Patagonian transition zone. Journal of biogeography, 37, 449-464.
• Wesser, S.D., Armbruster, W.S., 1991. Species distribution controls across a forest-steppe transition: a causal model and experimental test. Ecological Monographs, 323-342.
• Whittaker, R.H., 1972. Evolution and measurement of species diversity. Taxon, 213-251.
• Yaltırık, F., Efe, A., 1989. Otsu bitkiler sistematiği. İ.Ü. Orman Fakültesi Yayınları, İstanbul.
• Nielsen, D.R., Wendroth, O., 2003. Spatial and temporal statistics: sampling field soils and their vegetation. Catena Verlag, Germany.
• Rossi, R.E., Mulla, D.J., Journel, A.G., Franz, E.H., 1992. Geostatistical tools for modeling and interpreting ecological spatial dependence. Ecol. Monogr. 62, 277-314.
• Schaetzl, R., Anderson, S., 2005. Soils: Genesis and Geomorphology. Cambridge University Press, Cambridge. Stein, A., Brouwer, J., Bouma, J., 1997. Methods for Comparing spatial variability patterns of millet yield and soil data. Soil Sci. Soc. Am. J., 61, 861-870.
• Van der Putten, W.H., Bardgett, R.D., Bever, J.D., Bezemer, T.M., Casper, B.B., Fukami, T., Kardol, P., Klironomos, J.N., Kulmatiski, A., Schweitzer, J.A., Suding, K.N., Van de Voorde, T.F.J., Wardle, D.A., 2013. Plant-soil feedbacks: The past, the present and future challenges. J. Ecol. 101, 265–276.
• Webster, R., 2001. Statistics to support soil research and their presentation. Eur. J. Soil Sci. 52, 330–340.
• Wei, J.-B., Xiao, D.-N., Zeng, H., Fu, Y.-K., 2008. Spatial variability of soil properties in relation to land use and topography in a typical small watershed of the black soil region, northeastern China. Environ. Geol. 53, 1663–1672.
• Wellstein, C., Otte, A., Waldhardt, R., 2007. Impact of site and management on the diversity of central European mesic grassland. Agric. Ecosyst. Environ., 122, 203–210. Xue, W., Bezemer, T.M., Berendse, F., 2019. Soil heterogeneity and plant species diversity in experimental grassland communities: contrasting effects of soil nutrients and pH at different spatial scales. Plant Soil., 442, 497-509.
• Zhao, K., Liu, X., Xu, J., Selim, H.M., 2010. Heavy metal contaminations in a soil-rice system: Identification of spatial dependence in relation to soil properties of paddy fields. J. Hazard. Mater., 181, 778-787.