N:P Ratio in Development and Senescence Period of Caucasian Wingnut (Pterocarya fraxinifolia (Poiret) Spach) Which is a Relict Species in Swamps Forest of Haci Osman Nature Protection Area (Samsun/Turkey)

Öz

In this study foliar nutrient concentration of relict species “Pterocarya fraxinifolia (Poitret) Spach”

have been investigated throughout senescence and development season. Pterocarya fraxinifolia (Poiret) Spach

are occuring locally only at Hacı Osman swamp forest. Hacı Osman swamp forest are very important in terms of

ecosystem properties. Senescence and development foliar N:P ratio investigation of a relict species, should provide

further information about this species. Foliar N:P ratios on May, June, July and November below 12.5, August

foliar N:P ratio 14.7 and September and October foliar N:P ratios above 16 are founded. Foliar and soil N:P ratios

were compared and foliar nutrient contents were evaluated together with soil nutrient contents.

Anahtar Kelimeler

• Relict,N:P ratio,Swamp forest,devolepment,Senescence

Hacıosman Tabiat Koruma Alanı (Samsun/Türkiye) Subasar Ormanı’nda Relikt Bir Tür Olan Dişbudak Yapraklı Kanatlı Ceviz (Pterocarya fraxinifolia (Poiret) Spach)’in Gelişme ve Senesens Dönemindeki N:P Oranı

Öz

Bu çalışmada, relikt bir tür olan Pterocarya fraxinifolia (Poiret) Spach’nın gelişme ve senesens dönemindeki yaprak besin element içeriği araştırılmıştır. Pterocarya fraxinifolia (Poiret) Spach ülkemiz subasar ormanlarından sadece Hacı Osman Subasar Ormanı’nda yerel olarak bulunmaktadır. Bu nedenle ekosistem özellikleri bakımından ayrı bir öneme sahip olan subasar ormanlarda, relikt bir bitki türünün senesens ve gelişme dönemindeki yaprak N:P oranının incelenmesi, bu tür hakkında daha fazla bilginin elde edilmesini sağlayacaktır. Bu türün Mayıs, Haziran, Temmuz ve Kasım aylarında yaprak N:P oranı 12.5’in altında, Ağustos ayında N:P oranı 14.7, Eylül ve Ekim aylarında ise N:P oranı 16’nın üzerinde bulunmuştur. Ayrıca yaprak ve toprak N:P oranları karşılaştırılmış, yaprak besin elementi içeriği ile toprak besin elementleri birlikte değerlendirilmiştir

Anahtar Kelimeler

• Relikt, N:P oranı, Subasar orman, gelişme, Senesens

Kaynakça

1. Aerts, R., Chapin, F.S., 2000. The mineral nutrition of wild plants revisited: A re-evaluation of processes and patterns. Advances of Ecological Research, 30: 1-67.
2. Allen, S.E., Grimshaw, H.M., Parkinson, J.A., Quarmby, C., Ro- berts, J.D., 1986. Chemical analysis. Methods in Plant Eco- logy (Editor: S.B. Chapman), Blackwell Science, Oxford, pp. 411-466.
3. Bobbink, R., Hornung, M., Roelofs, J.G.M., 1998. The effects of air-borne nitrogen pollutants on species diversity in natural and semi-natural european vegetation. Journal of Ecology, 86: 717-738.
4. Boerner, R.E.J., Koslowsky, S.D., 1989. Microsite variations in soil chemistry and nitrogen mineralization in a beech-maple fo- rest. Soil Biology & Biochemistry, 21: 795-801.
5. Calhoun, A.J.K., 1999. Forest wetlands, in maintain biodiversity in forest ecosystems. Chapter 9, Cambridge University Press.
6. Davis, P.H., 1982. Flora of Turkey and the East Aegean Island. Vo- lume 7, Edinburg.
7. Dumas, J.B.A., 1831. Procedes de l´analyse organic. Annales de Chimie et de Physique, 247: 198-213.
8. Elser, J.J., Fagan, W.F., Denno, R.F., Dobberfuhl, D.R., Folarin, A., Huberty, A., Interland, S., Kilham, S.S., McCauley, E., Schulz, K.L., Siemann, E.H., Sterner, R.W., 2000. Nutritional cons- traints in terrestrial and freshwater food webs. Nature, 408: 578-580.

9. Falkengren-Grerup, U., Diekmann, M., 2003. Use of a gradient of N-deposition to Calculate effect-related soil and vegetation measures in deciduous forests. Forest Ecology and Manag- ment, 180: 113-124.
10. Gusewell, S., 2004. N:P ratios in terrestrial plants: variation and functional signifacance. New Phytologist, 164: 243-266.
11. Güsewell, S., Koerselman, W., 2002. Variation in nitrogen and phosphorus concentrations of wetland plants. Perspectives in Ecology, Evolution and Systematics, 5: 37– 61.
12. Han, W., Fang, J., Gua, D., Zhang Y, 2005. Leaf nitrogen and phosp- horus stoichiometry across 753 terrestrial plant species in Chi- na. New Phytologist, 168: 377-385.
13. Tomassen, H.B.M., Smolders, A.J.P., Lamers, L.P.M., Roelofs, J.G.M., 2004. Expansion of Invasive Species on Ombrotrop- hic Bogs: Desiccation or High N Deposition? Journal of App- lied Ecology, 41:139–150.
14. Knecht, M.F., Göransson, A., 2004. Terrestrial plants require nut- rients in similar proportions. Tree Physiology, 24: 447-460.
15. Kutbay, H.G., Ok, T., 2000. Pterocarya fraxinifolia (Poiret) Spach: Juglandaceae dişbudak yapraklı kanatlı ceviz. Ondokuz Ma- yıs Üniversitesi Fen-Edebiyat Fakültesi Fen Dergisi, 11(1): 91-96.
16. Lee, J.A., Caporn, S.J.M., 1998. Ecological effects of atmospheric reactive nitrogen deposition on semi-natural terrestrial ecosy- stems. New Phytologist, 139: 127-134.
17. Lindsay, W.L., Norvell, W.A., 1978. Development of a DTPA soil test for zinc, iron, manganese and copper. Soil Sicience Soci- ety of American Journal, 42: 421-428.
18. Olde Venterink, H., Wassen, M., Verkroost, A.W.M., de Ruiter, P.C., 2003. Species richness-productivity patterns differ between N-, P-, and K-limited wetlands. Ecology, 84: 2191-2199.
19. Olsen, S.R., Cole, C.V., Watanabe, F.S., Dean, L.A., 1954. Estima- tion of available phosphorus in soils by extraction with sodi- um bicarbonate. In: USDA Circular. USDA, Washington, DC, p. 939.
20. Roem, W.J., Berendse, F., 2000. Soil acidity and nutrient supply ra- tio as possible factors determining changes in plant species diversity in grassland and heathland communities. Biological Conservation, 92: 151–161.
21. van Heerwaarden, L.M., Toet, S., Aerts, R., 2003. Current measures of nutrient resorption efficiency lead to a substantial underes- timation of real resorption efficiency: facts and solutions. Oi- kos, 101: 664-669. Çok Fazla > 0.130 > 38 > 24