DIGITALNA ARHIVA ŠUMARSKOG LISTA
prilagođeno pretraživanje po punom tekstu



ŠUMARSKI LIST 3-4/2017 str. 22     <-- 22 -->        PDF

RASPRAVA
In this study, which was carried out in order to determine the aboveground and belowground biomass amounts of maquis lands within the borders of Çamalan Forest Sub-District Directorate in Tarsus Forestry Department of Mersin Regional Forest Directorate in eastern region of Mediterranean basin, the evaluations were performed based on the data obtained from 35 sampling areas in terms of the factors of altitude, exposure, mean vegetation height, and mean age. Moreover, it was also statistically examined if there is a relation between stored biomass and relevant factors. As it can be seen in results and graphs presented in „Findings” section, maquis biomass values have a very wide variation and no high-grade statistically significant relationship can be established between the maquis biomass values.
According to the data obtained in our study, the mean aboveground biomass amount was found to be 24,183 ton/ha. Moreover, it was determined that the belowground biomass contains approximately 41,062 ton/ha of root. Of the total fresh biomass amount, approximately 63.98% consists of dry matter. This value is higher than that of Taurus cedar (0.51) and Calabrian pine (0.61) sharing the same habitat (Durkaya et al, 2013, Durkaya et al., 2015). McPherson et al. (1994), by reviewing the literature, have found it appropriate to converse the fresh biomass into dry biomass by multiplying with 0.56 for broadleaved species and with 0.48 for coniferous species. As it can be seen, the maquis components conversion coefficient is also higher than 7.98%, which has been projected for the broadleaved species.
In accordance with the obtained results, the root/shoot ratio was found to be 1.7. The interesting point here is the redundancy of belowground biomass amount. As well as this situation can be explained with the harmony with habitat having low humidity, it can also be correlated with the use of aboveground portion for purposes of feeding animals and using as energy source by humans.
While the mean aboveground biomass in maquis scrubland dominated by Quercus coccifera was found to be 20.21 ton/ha in our study, Sağlam et al. (2008) have determined the total flammable matter biomass in maquis population in Aegean region, where Quercus coccifera L., the dominant species, have mean vegetation height of 0.53-1.30 m, to vary between 7 and 67.4 ton/ha. Canadel and Roda (1991) have found the aboveground and belowground biomass of Quercus ilex populations to be 160 ton/ha and 63 ton/ha, respectively. It can be seen that there are significant differences between the biomass amounts of not only the different maquis populations but also the similar maquis populations. These differences can be attributed to the genetic factors, crown closure, the species in composition and their portions, habitat conditions, and human interventions.