بررسي ساختار جنگلهاي حرا در حوزه خمير و قشم (استان هرمزگان ) با استفاده از آماربرداري به روش ترانسكت

Avicennia marina forest structure using line plot method

Descriptive mangrove plants structure (zonation) is one of the sustainable utilization of ecological management tools in coastal plants formation for the determination of Avicennia marina (Harra) forest structure in Ilarra biosphere reserve of Persian Gulf, Hormozgan Provice coastal regions, using line transect block-random design and quadrate plot random-systematic design.By the formation of 68 sampling plots parameters of 421 individual Harra trees were considered for statistical use. Mangrove vegetation in this region extending in an area of 9206 hectares with average individulʹs density of 859 trees per hectare (tr./hect.) having an estimated average height of 261.1 corn and average trunk diameter from soil intersection of 17.8 cm. Crown average height and diameter of these trees were 220.9 and 230.1 cm respectively with existing average estimated aerial breathing roots number of 243.8 I m2 of substratum with an average length 13.4 cm. Average number of shed leaves for the same extension of substratum is estimated at 51.6 in Spring and 107.5 leaves in Autumn; seasons with significance difference of foliage between seasons."The average area of each individual leaves shed in both season being at 7.4 to 8.2 cmʹ were not significantly different. Statistical analysis in this plantations showed that mangrove communities of this region cannot be segregated into independent integrates and they can be regarded as homogenous cover stand. Statistical association of considered parameters showed that by using regression line equations of crown area extend that is estimated aerial photography can be used to estimate other alternative parameters of trees within this region.