Natural Changes in Stand Structure in the Permanent plot of Hyrcanian forests (North of Iran)
Journal Title: Journal of Biodiversity and Environmental Sciences (JBES) - Year 2016, Vol 8, Issue 4
Abstract
This research was aimed to investigate natural changes in stand structure of Hyrcanian forests. Forest structure, proportion of dead wood, and proportion of tree species were studied in 2006 and 2012. Results of the inventory of total 2375 trees in 2012, showed 3 layers and uneven-aged structure in a forest type of Fagus orientalis-Carpinus betulus. Other results are as following: mean tree number 389 ha-1, mean basal area 43 m2ha-1, mean stand volume 538 m3ha-1, and De’ Liocourt factor is 1.38. Dead trees were counted about 3.1% of the tree number and 5.7% of the stand volume. Comparison of the two inventories showed that beech trees are gaining more proportion among the tree species in almost all diameter classes, while hornbeam is losing more presence in the diameter classes. In DBH classes lower than 30 cm the proportion difference between beech and hornbeam is more obvious. Volume of damaged trees (broken, hollow, snag and log) was counted about 97 m3ha-1; while for dead woods was 30.6 m3ha-1. Within the six years of study, the hollow large trees have been fallen down. Dying of trees in DBH classes of lower than 50 cm provides a lot of scattered small gaps within the stand and caused establishment of younger individuals and cohorts. Almost 9.6 m3ha-1, comprising 1.6% of total volume, 28% of dead tree and 8.9% of damaged trees, was decomposed. In general view this forest is tending from the senility to juvenility in forest succession.
Authors and Affiliations
M. Amini, K. H. Saghebtalebi, R. Amini, S. H. Amini
Keywords
Related Articles
- EP ID EP38805
- DOI -
- Views 159
- Downloads 0
Antagonist effect of volatile organic compounds produced by Debaryomyces hansenii on Colletotrichum gloeosporoides as anthracnose reason of tropical apples.
The usage antagonist yeast for biological control had emerged as one of the most promising alternatives in pre and postharvest protection of apples in Indonesia. The aim of the research was to identify volatile organic c...
Culturable gut microbiota of marine wood boring invertebrates Dicyathifer manni (wright, 1866), Sphaeroma terebrans (Bate, 1866) and Cirolana sp
The cultured aerobic copiotrophic bacteria and fungi from the digestive tracts of Dicyathifer manni (Wright, 1866), Sphaeroma terebrans (Bate, 1866) and a Cirolana sp. were investigated. The objective of the present st...
Comparison of maize hybrids effect on seed traits
In order to determine the growing characteristics and detecting the morphological bases of yield difference, study of relations between different traits with each other and with grain yield, determining the most importa...
Diversity and distribution of tree species in the hills of Chittagong Metropolitan Area, Bangladesh
Chittagong City is surrounded by several hills which were abundant with biodiversity but continuously destroying now due to high population pressure and development. To explore current status of species diversity and d...
Jasmonic acid influence on the activity of hyp-1 gene in St. John’s wort (Hypericum perforatum)
Considering the importance of hyp-1 gene function in hypericin biosynthesis in Hypericum perforatum, we studied the effect of various concentrations of jasmonic acid on the expression of this gene through qRT-PCR method....