The role of slope as an environmental variable in plant biodiversity change in Aegean rangelands by SHE analysis: The case of Çakmar rangeland

Öz

Rangelands, which have rich plant and animal biodiversity, are also very important as a source of roughage for livestock. Rangeland vegetation patterns vary considerably under the influence of environmental factors. Indicator factors need to be identified and analyzed in order to manage conservation and utilization objectives. In rangelands of the Aegean region, the slope factor can greatly affect the rangeland plant biodiversity in areas close to the base rangeland. In order to investigate the spatial distribution and species variation in plant biodiversity caused by slope, 6 rangeland sections with different slopes were sampled in Koçarlı region (Aydın / Türkiye). Sampling was carried out using the transect method in the spring 2017 based on field observations. Following sampling, indicator species and species distribution and abundance were determined. Alpha biodiversity indices were used to determine the change in species biodiversity by SHE analysis. SHE analysis tests the relationship between S (species richness), H (Shannon-Wiener diversity index) and E (equality). This method aims to examine the contribution of the number of species and the concept of equity in the context of diversity. According to the information obtained as a result of the analysis, it was seen that the increase in slope may cause a decrease in species biodiversity. More species diversity was found in rangelands with low base and slope. Factors such as erosion and water transport affect the canopy and species abundance in high slope rangelands. However, other factors such as grazing intensity can reverse this situation. For this purpose, it has been determined that slope is an important environmental variable when preparing management plans based on grazing capacity and grazing animal species in vegetation studies.

Anahtar Kelimeler

• alpha biodiversity
• rangeland vegetation
• Shannon-Wiener index
• rangeland ecology

Kaynakça

1. Alkemade, R., Reid, R., Berg, M., Leeuw, J., Jeuken, M. (2012). Assessing the impacts of livestock production on biodiversity in rangeland ecosystems. Proceedings of the National Academy of Sciences, 110(52), 20900-20905. https://doi.org/10.1073/pnas.1011013108
2. Dhyani, S., Sivadas, D., Basu, O., Karki, M. (2022). Ecosystem health and risk assessments for high conservation value mountain ecosystems of south asia: a necessity to guide conservation policies. Anthropocene Science, 1(1), 211-225. https://doi.org/10.1007/s44177-022-00010-8
3. Gebremedhn, H., Sintayehu, D., Tuffa, S., Tesfay, Y., Adam, D. (2023). Traditional grazing management practices affect vegetation dynamics in the somali pastoral ecosystem of ethiopia.. https://doi.org/10.22541/au.167955328.89297988/v1
4. Gemechu, T., Dalle, G. (2023). Rangeland Biodiversity: Status, Challenges and Opportunities Review. Journal of Rangeland Science, 13(3), 1-9.
5. Gülsoy, S., Özkan, K. (2008). Tür Çeşitliliğinin Ekolojik Açıdan Önemi ve Kullanılan Bazı İndisler. Süleyman Demirel Üniversitesi Orman Fakültesi Dergisi Seri: A, Sayı: 1, Yıl: 2008, ISSN: 1302-7085, 168-178
6. Han, J. G., Zhang, Y. J., Wang, C. J., Bai, W. M., Wang, Y. R., Han, G. D., Li, L. H. (2008). Rangeland degradation and restoration management in China. The Rangeland Journal, 30(2), 233-239.
7. İspirli, K., Alay, F., Uzun, F., Çankaya, N. (2016). Doğal meralardaki vejetasyon örtüsü ve yapısı üzerine otlatma ve topografyanın etkisi. Türkiye Tarımsal Araştırmalar Dergisi, 3(1), 14-22.
8. Kara, A. (2020). Determination of the factors affecting utilization rate of eastern anatolian semiarid public rangelands in Türkiye. International Journal of Agriculture Environment and Food Sciences, 4(1), 119-129. https://doi.org/10.31015/jaefs.2020.1.14

9. Kenneth, E. S., Pierson, F. B., Robichaud, P. R. (2009). Effect of plant species composition on rangeland hydrology and erosion. In 62nd Society for Range Management Annual Meeting, Paper (No. 07-9).
10. Kılınç, M., Kutbay, H. G., Yalçın, E., Bilgin, A. (2006). Bitki ekolojisi ve bitki sosyolojisi uygulamaları. Palme Yayıncılık, Ankara.
11. Koç, A. (2001). Autumn and spring drought periods affect vegetation on high elevation rangelands of Türkiye. Journal of Range Management, 54(5), 622. https://doi.org/10.2307/4003594
12. Koç, A., Çakal, Ş. (2004). Comparison of some rangeland canopy coverage methods. In International Soil Congress Natural Resource Management for Sustainable Development (Vol. 7, No. 10, pp. 41-45).
13. Koç, A., Gullap, M., Sürmen, M., Erkovan, H. (2020). Changes in some vegetation properties of the rangelands of the palandöken mountains, erzurum, over two decades. Turkish Journal of Agriculture and Forestry, 44(6), 589-598. https://doi.org/10.3906/tar-1909-37
14. Koç, A., Gökkuş, A., Gullap, M., Erkovan, H., Sürmen, M. (2021). Changes in rangeland condition and health of Palandöken mountain rangelands over two decades. Turkish Journal of Range and Forage Science, 2(2), 37-43. https://doi.org/10.51801/turkjrfs.987396
15. Mohammadi, S., Keshavarzi, M., Kazemi, A., Berizi, E., Mohsenpour, M., Ghaffarian-Bahraman, A. (2021). Occurrence of aflatoxin m 1 in yogurt of five countries in west asia region: a systematic review and meta‐analysis. Journal of Food Safety, 41(4). https://doi.org/10.1111/jfs.12897
16. Molinar, F., D. Galt, J. Holechek. (2001). Grazing management practices can be key to accumulating mulch– vegetation residue–which is beneficial for decreasing soil erosion, improving water infiltration and increasing forage production on rangelands. Rangelands 23 (4) 3-7.
17. Negiz, M. G., Kurt, E. Ö., Şentürk, Ö. (2017). Isparta-Yenişarbademli yöresi ormanlık alanlarında tür merkezli tıbbi ve aromatik bitki tür zenginliğinin hesabı üzerine örnek bir çalışma. Türkiye Ormancılık Dergisi, 18(4), 282-288.
18. Özkan, K. (2012). Taksonomik çeşitlilik indislerinin geleneksel çeşitlilik indisleri ile karşılaştırılması. SDÜ Orman Fakültesi Dergisi, 13, 107-112.
19. Özkan, K. (2016). Biyolojik Çeşitlilik Bileşenleri Biyolojik Çeşitlilik Bileşenleri (α, β ve γ) Nasıl Ölçülür? Süleyman Demirel Üniversitesi: Orman Fakültesi. Yayın No:98-Isparta, 2016.
20. Severoğlu, S., Gullap, M. (2020). Effects of animal grazing on favorable forage yield and quality of rangelands with different slope. Turkish Journal of Field Crops, 25(2), 168-173.
21. Su, Q. (2018). A relationship between species richness and evenness that depends on specific relative abundance distribution. PeerJ, 6, e4951.
22. Sürmen, M., Kara, E. (2022). Effects of suppression applications on summer asphodel (asphodelus aestivus brot.) density, botanical composition, forage yield and quality of aegean rangelands. Turkish Journal of Field Crops, 27(1), 61-70. https://doi.org/10.17557/tjfc.1051111
23. Sürmen, M., Yavuz, T., Sürmen, B., İmamoğlu, A. (2020). Samsun ili çayır ve meralarında bitki çeşitliliğinin orta dereceli tahribat hipotezine göre otlatma ve erozyon faktörleri ile test edilmesi. Uluslararası Tarım ve Yaban Hayatı Bilimleri Dergisi, 6(3), 570-581.
24. Şentürk, Ö., Negiz, M. G., Gülsoy, S. (2019). Kızılçam meşcerelerinde alfa tür çeşitliliği–yetişme ortamı ilişkileri: Gölhisar yöresi örneği. Bilge International Journal of Science and Technology Research, 3(2), 178-188.
25. Topçu, G. D., Özkan, Ş. S. (2017). Türkiye ve Ege bölgesi çayır-mera alanları ile yem bitkileri tarımına genel bir bakış. ÇOMÜ Ziraat Fakültesi Dergisi, 5(1), 21-28.
26. Torralba, M., Fagerholm, N., Burgess, P., Moreno, G., Plieninger, T. (2016). Do european agroforestry systems enhance biodiversity and ecosystem services? A meta-analysis. Agriculture Ecosystems & Environment, 230, 150-161. https://doi.org/10.1016/j.agee.2016.06.002
27. Tuomisto, H. (2012). An updated consumer’s guide to evenness and related indices. Oikos, 121(8), 1203-1218.
28. Waterhouse, H. (2023). Diversified vegetation types on rangelands promote multiple soil‐based ecosystem services. Land Degradation and Development. https://doi.org/10.1002/ldr.4967
29. Yazgı, D., Yılmaz, K. T. (2017). Employing SHE analysis method for evaluating landscape diversity. Biological Diversity and Conservation, 10 (3), 65-72
30. Yetişgin, S., Aydemir, Ş. (2019). A preliminary study on grazing pattern of sheep transhumance in Türkiye. Turkish Journal of Agriculture - Food Science and Technology, 7(10), 1629-1634. https://doi.org/10.24925/turjaf.v7i10.1629-1634.2699
31. Zeng, X. H., Zhang, W. J., Song, Y. G., Shen, H. T. (2014). Slope aspect and slope position have effects on plant diversity and spatial distribution in the hilly region of Mount Taihang, North China. J Food Agric Environ, 12, 391-397.