Journal of Forest Science, 2021 (vol. 67), issue 8
Distribution attributes of natural canopy gaps in the Hyrcanian mixed-oriental beech forestsOriginal Paper
Asadollah Mataji, Ali-Asghar Vahedi
J. For. Sci., 2021, 67(8):367-375 | DOI: 10.17221/150/2020-JFS 
One of the most important issues indicating the quality and quantity of forest ecosystems is the distribution of natural disturbances resulting in canopy gaps (CGs). The present study was conducted in one of the Hyrcanian beech forests in northern Iran in summer 2018. The gap areas were classified into small (< 200 m2), medium (200‒500 m2) and large gaps (500-1 000 m2) on the basis of full inventory. The univariate Ripley's L-function was used for introducing the CG spatial pattern. Furthermore, mark correlation function (MCF) and density function (DC) in turns were used for verifying the correlation and frequency...
Soil aggregate stability index and particulate organic matter in response to differently afforested lands in the temperate regions of IranOriginal Paper
Masoomeh Soleimany, Jamshid Eslamdoust, Moslem Akbarinia, Yahya Kooch
J. For. Sci., 2021, 67(8):376-384 | DOI: 10.17221/20/2021-JFS
Aggregate Stability Index (ASI) and particulate organic matter (POM) are strongly influenced by land use and management. This work illustrates the effects of plantations on ASI and POM-C and POM-N in northern Iran. Three plantations of P. deltoides (PD), T. distichum (TD), A. subcordata (AS), and a fourth site ‒ adjacent abandoned lands (BL, as control) were selected. Soil samples were taken within 16 quadrats of each plantation and BL from the two depths of 0-15 cm and 15-30 cm during the summer. Soil C was significantly higher under TD (2.10%) than under BL (2.02%) > PD (1.61%) >...
The influence of growing medium composition on pine and birch seedling response during the period of simulated spring droughtOriginal Paper
Ondřej Špulák, Jana Hacurová
J. For. Sci., 2021, 67(8):385-395 | DOI: 10.17221/39/2021-JFS
Climate change increases the earliness and effect of spring dry spells. The efforts to reduce their negative effects on tree regeneration include improvement in physical properties of soil aimed at an increase in water retention and availability. Clinoptilolite from the group of zeolites belongs among such water-absorbent natural materials. The article aims to assess the effect of clinoptilolite admixture in a growing medium, along with different fertilizer concentration, on the growth of pine and birch seedlings and their development during simulated drought. A common (reference) growing medium was tested along with 4 treatments of the growing medium...
Variation in morphological and wood cell traits in coppice stems of Populus nigra L. and Salix alba L.Original Paper
Seray Özden Keleş
J. For. Sci., 2021, 67(8):396-407 | DOI: 10.17221/208/2020-JFS
Coppice management is an ecologically important silvicultural practice to provide the quicker and higher potential of wood biomass production for industrial demands. Understanding morphological and anatomical responses of coppiced trees could help to determine the quantity and quality of wood and thus provide better management of coppiced tree plantations for short-time biomass production. However, there is a little investigation in morphological and anatomical adaptation in different fast-growing tree species. The present study, therefore, studied how morphology and anatomy vary between two fast-growing coppices of Populus nigra L. (black...