Effect of tannin amount of leayer branches and litters and soil carbon contents of three plant species from East Mediterranean region

Carbon, total soluble tannins, tannin free phenols and extractable condensed tannins contents were determined from leaves, branches, litters and soils of the Pinus brutia Ten., Quercus coccifera L. and Ceratonia siliqua L. sampled during March-June 2008 period from Cukurova University campus which has Mediterranean climate.While the carbon constituents of the C. siliqua and P. brutia soils were closer in each there months, the soil of Q. coccifera was found significantly different from others in June (P<0,05).No difference was found in carbon constituent of the branch, leaves and litters during the three sampling periods.Total soluble tannins and tannin free phenol ingredients were stable during the March, June and September periods, while condensed tannins increased in P. brutia and decreased in Q.coccifera being lower in C. siliqua.No relationship was found between the tannin constituent of the plants and soil organic carbon.