Journal of Forest Science, 2019 (vol. 65), issue 12
Stem production of Scots pine and black locust stands in Ukraine's Northern SteppeOriginal Paper
Viktoriia Lovynska, Petro Lakyda, Svitlana Sytnyk, Ivan Lakyda, Yuriy Grithan, Anotoliy Hetmanchuk
J. For. Sci., 2019, 65(12):461-471 | DOI: 10.17221/92/2019-JFS 
Abstract: The research paper presents the results of the assessment of the annual stem production of Scots pine (Pinus sylvestris L.) and black locust (Robinia pseudoacacia L.) stands within the Northern Steppe of Ukraine. The research team has developed two- and three-factor regression models for assessing the live biomass stocks for the fractions of the wood and bark of the stems of the Scots pine and black locust stands. The paper also presents the dependences of the live biomass of the components of the stems of the stands on their selected biometric parameters. The direct positive correlation between the fractions of the wood,...
Estimating the recreational values of forest park using the contingent valuation method (case study: Kabudval Forest Park, Golestan Province of Iran)Original Paper
Saeid Satari Yuzbashkandi, Amir Mehrjo
J. For. Sci., 2019, 65(12):472-480 | DOI: 10.17221/95/2019-JFS
Forest parks are the main tourism sources in Iran. Growing population, traditional patterns changing, urban environmental contamination and emergent need of leisure times highlighted the importance of this issue. This study aimed to estimate the willingness to pay (WTP) and non-market values of Kabudval Forest Park of Golestan province. For this purpose, the contingent valuation (CV) method based on the maximum likelihood logit regression model was used. The required data were obtained from 152 visitors to the park that were randomly selected in different seasons. Results indicated that the average of WTP for each individual to protect the park was...
Application of time-cost trade-off model in forest management projects: The case of Oak decline projectOriginal Paper
Mehdi Zandebasiri, Hrald Vacik, Daniel Etongo, Yasmin Dorfstetter, Javad Soosani, Mehdi Pourhashemi
J. For. Sci., 2019, 65(12):481-492 | DOI: 10.17221/65/2019-JFS
Oak decline has been observed periodically in the different parts of the world. We conducted this study to evaluate the project control in this phenomenon. In this paper, the project control methods have proposed to be useful tools to deal with oak decline. The aim of the study is twofold: (i) define and schedule a set of activities and determine times for those activities in the Control of Forest Decline Project (CFDP) using the Project Evaluation and Review Technique (PERT) method; (ii) apply the Critical Path Method (CPM) within the context on how to reduce the project time by increasing operating costs and crashing the activities. In crisis management,...
Calculation of the aboveground carbon stocks with satellite data and statistical models integrated into the climatic parameters in the Alborz Mountain forests (northern Iran)Original Paper
Mohadeseh Ghanbari Motlagh, Sasan Babaie Kafaky, Asadollah Mataji, Reza Akhavan
J. For. Sci., 2019, 65(12):493-503 | DOI: 10.17221/107/2019-JFS
The forest ecosystems of northern Iran in the Alborz Mountains with a wide distribution range have variations in the composition and types of the plants, soil, structure, carbon stocks and climatic conditions. This study investigated the use of a satellite database and climatic parameters in estimating the carbon reserves. Three regions were selected for the distribution range of these forests. The data of 4 climatic parameters (MAP, MHR, MAE and MAT) were modelled based on the relationship with an elevation gradient. 5 spectral vegetation indices (RVI, NDVI, SR, NDGI, DVI and TVI) and near-infrared band (NIR) extracted from the satellite data and...