Kambiz Abrari vajari

• Lorestan University

Research Highlights: Fine roots play an important role in plant growth as well as in carbon (C) and nutrient cycling in terrestrial ecosystems. Gaining a wider knowledge of their dynamics under forest gap opening would improve our understanding of soil carbon input and below-ground carbon stock accumulation. Single-tree selection is increasingly re...

Understanding variations in soil humus and fine root properties in Oriental beech (Fagus orientalis L.) stand in response to development stages in temperate Hyrcanian forests is essential for sustainable forest management. The development stages of beech stand (initial, optimal and decay) were determined, and three plots of 100 × 100 m (1 ha) were...

This study aimed at evaluating the physical, chemical and biological properties of soil in the developmental stages of oriental beech (Fagus orientalis Lipsky) forest in Asalem-Guilan region. Three 1-hectare plots (100 ×100 m2) with different stages of development including initial, optimal and decay were selected. Soil sampling was carried out at...

Understanding the effects of silvicultural practices including single-tree selection on soil properties is essential for forest management in temperate broadleaved beech forests. Changes in physico-chemical and biological soil properties in 15 harvest-created gaps under single-tree selection and the adjacent closed canopies, with five replications...

The response of diversity and biomass of herbaceous functional groups along an altitudinal gradient in mountainous forests of southern Zagros, Khuzestan Province, Iran was studied by sampling vegetation in 30 circular 1000-m² plots in herb layer of the forest floor within 646–2447 m asl (lowland: < 1000 m asl, midland: 1000–2000 m asl, highland: >...

Abstract A comprehensive study on breaking dormancy of mountain ash(Sorbus luristanica Bornm.) endemic species is still lacking. Here, the high efficient potentials of multiwall carbon nanotubes were used to break seed dormancy and improve seed germination in mountain ash. First, the seeds were primed with different concentrations of the nano-mater...

This study investigated the interactions between tree-herb layer diversity and some physico-chemical and eco-physiological characteristics of soil in natural oriental beech stand in western Guilan, Iran. The data were collected from nine research sites (50 m × 50 m) which were described as a gradient from pure oriental beech (Fagus orientalis Lipsk...

Oriental beech (Fagus orientalis Lipsky) is one of the most important commercial tree species in the Hyrcanian region. This species is known to suffer from strong intra- and interspecific competition for above- and below-ground resources in temperate mixed stands. In the present study, a total of 26 beech trees and their surroundings trees as well...

The vegetation ordination and classification based on conservatism species can be better able to analyze the ecological relationships between vegetation and environmental factors. This study aimed to investigate changes in herb layer vegetation of Quercus brantii, Q infectoria, and Pyrus glabra forest types based on conservatism species, at differe...

Zagros forest in Iran has been heavily altered by anthropogenic disturbances such as farming, grazing and other activities. In this study, we first estimated the herbaceous plants coefficient of conservatism within this region. Forest integrity of different land uses was then assessed by common measures of plant diversity and the indices were speci...

The purpose of present research was to response the herb-layer species to overstorey diversity along a gradient of tree diversity in unmanaged beech stands in Asalem forests, western Guilan. The data was collected from 27 research sites, which were described as a gradient from pure beech (Fagus orientalis Lipsky) stands to mixed stands with up to 9...

Beech forests of northern Iran in the Hyrcanian ecosystem are considered as the richest and most valuable forests in the northern hemisphere. The present study was carried out in the part of the district No 3, Nav, Asalem (3770 ha) in the west of Guilan Province. In order to identify the flora, the Chorology, life forms and growth forms, herbaceous...

Beech forests of northern Iran in the Hyrcanian ecosystem are considered as the richest and most valuable forests in the northern hemisphere. The present study was carried out in the part of the district 3, Nav, Asalem (3770ha) in the west of Guilan Province. In order to identify the flora, the Chorology, life forms and growth forms, herbaceous und...

The present research focuses on the effect of eight-year-old artificially created gaps on some properties of humus in managed beech-dominated stand in Hyrcanian forest of northern Iran. In this study, six-teen gaps were sampled in site and were classified into four classes (small, medium, large, and very large) with four replications for each. Humu...

The present study was carried out in the Hashtadpahlou and Sefidkoh mountains which are important vegetation regions in the western Iran, Lorestan. The endemic plants and their life form in these mountain regions were determined. From the view point of regional elements, plants of these regions belong to Irano-Turanian region. Totally, 86 endemic...

We studied the species diversity of the herb layer and ecological factors in harvest-created gaps in beech stands under a single-tree selection system in Northern Iran. To determine diversity, the number of beech seedlings, and other ecological factors, 16 gaps were selected and subplots of 5 m2 were positioned at the centre and at the cardinal poi...

A case study was conducted in beech forests of northern Iran to determine the effect of the created gaps on some soil properties in beech stand. Changes of soil properties in small (60–150 m2), medium (151–241 m2), large (242–332 m2) and very large (333–550 m2) gaps, as well as under closed stands were studied eight years after the gap creation. So...