En
  • دکتری (1388)

    جامعه شناسی گیاهی و اکولوژی بذور گونه های جنگلی

    تربیت مدرس، تهران، ایران

  • کارشناسی‌ارشد (1382)

    مهندسی منابع طبیعی ، جنگلداری

    دانشگاه تربیت مدرس، تهران، ایران

  • طبقه بندی و تحلیل اکولوژیک جوامع گیاهی گونه های گیاهی منحصر به فرد هیرکانی
  • بکارگبری مدل های پاسخ گونه-محیط در تعیین مطلوبیت رویشگاهی گونه های جنگلی
  • پیش بینی شیب تغییرات محیطی جوامع جنگلی هیرکانی با استفاده از ترکیب گونه های معرف
  • توسعه ضرایب ارزش معرف النبرگ برای گیاهان آوندی جنگل های هیرکانی
  • اکولوژی بذور و اهمیت بانک بذر خاک در احیای جوامع جنگلی (ماندگاری بانک بذر خاک- اثر آتش سوزی)
  • آزمایشگاه تحقیقات بذر

    زمینه های پژوهشی: اکولوژی و تکنولوژی بذور

    کارشناس مسئول: مهندس منوچهر نائیجی

    تلفن: 01144999092

    مکان: نور، دانشکده منابع طبیعی دانشگاه تربیت مدرس

  • گلخانه بانک بذر خاک

    زمینه های پژوهشی: تحقیقات بانک بذر خاک

    کارشناس مسئول: مهندس منوچهر نائیجی

    تلفن: 01144999092

    مکان: نور، دانشکده منابع طبیعی دانشگاه تربیت مدرس

داده ای یافت نشد

ارتباط

رزومه

The assignment of relev?s to pre-existing vegetation units: a comparison of approaches using species fidelity

Hamed Asadi, Omid Esmailzadeh, Miquel De C?ceres, Seyed Mohsen Hosseini
Journal PapersAnnals of Forest Science , Volume 78 , Issue 1, 2021 March , {Pages 23-Jan }

Abstract

• AimsThe main aims were to evaluate the relative predictive performance of different statistical fidelity measures for the reassignment of relev?s to existing vegetation units, and in which cases reassignments improve the quality of the original classification.• MethodsWe took the classifications produced by three commonly used unsupervised classification methods, and all relev?s were reassigned to the closest vegetation unit according to the total fidelity value index (TFVI), where fidelity value had been calculated using one of eight distinct statistical measures, and according to the frequency-positive fidelity index (FPFI). Classifications obtained after relev? reassignments were compared to the initial ones using the Adjusted Rand

Evaluating the different indicator species analysis in the classification of plant communities

BG Saberi, O Esmailzadeh, H Asadi
Journal PapersIranian Journal of Forest , Volume 12 , Issue 4, 2021 February 19, {Pages 541-555 }

Abstract

The goal of this study is to evaluate the quality of numerical methods (Phi fidelity and indicator value indices) and non-statistical (constancy ratio and total cover ratio indices) in determining the indicator species of Beech plant communities in the eastern Hyrcanian forests. For this purpose, six ecological groups were first classified using two-way indicator analysis or TWINSPAN. Then, by using sum of the indicator value/association indices or TFVI, as a similarity index for assignment of the plot to the plant communities, with emphasizing the result of species and plant communities association (based on 10 algorithms), the groups were reclassified. Evaluating the compatibility of the results of each classification algorithms with the

Classification of forest communities (co-) dominated by Taxus baccata in the Hyrcanian forests (northern Iran) and their comparison with southern Europe

P Karami-Kordalivand, O Esmailzadeh, W Willner, J Noroozi, SJ Alavi
Journal PapersEuropean Journal of Forest Research , 2021 January 3, {Pages 14-Jan }

Abstract

English yew (Taxus baccata) is one of the few gymnospermous species present in the Hyrcanian forests, and it is listed as a rare and endangered species prone to extinction in Iran. This study aims to determine the ecological capability of Taxus baccata in the Hyrcanian region by identifying the diversity of plant communities dominated by this species, and to compare their floristic composition with the Taxus communities of southern Europe (Sicily, Corsica, Sardinia). We collected 408 relev?s in the central and eastern part of the Hyrcanian forests. The classification of plant communities was performed using TWINSPAN. Phi-coefficient index, constancy ratio, and the ratio of average cover were used to determine diagnostic species

Genetic Diversity and Structure of Rear Edge Populations of Sorbus aucuparia (Rosaceae) in the Hyrcanian Forest

H Yousefzadeh, S Raeisi, O Esmailzadeh, G Jalali, M Nasiri, Ł Walas, ...
Journal Papers , , {Pages }

Abstract

Morphological variation in leaf & seed germination characteristics of Rowan tree (Sorbus aucuparia L.) in the Hyrcanian forest

S Raeisi, H Yousefzadeh, GA Jalali, O Esmailzadeh
Journal Papers , , {Pages }

Abstract

The assignment of relevés to pre-existing vegetation units: a comparison of approaches using species fidelity

H Asadi, O Esmailzadeh, M De Cáceres, SM Hosseini
Journal Papers , , {Pages }

Abstract

Morphological traits variation of needle in males and females yew (Taxus baccata L.) in the Hyrcanian forests of Iran

A Hematzadeh, O ESMAILZADEH, S JALALI, MH MIRJALILI, ...
Journal Papers , , {Pages }

Abstract

Optimizing the classification of species composition data by combining multiple objective evaluators toward selecting the best method and optimum number of clusters

Samaneh Tavakoli, Hamid Ejtehadi, Omid Esmailzadeh
Journal PapersPhytocoenologia , Volume 50 , Issue 2, 2020 January , {Pages 163-172 }

Abstract

Classification is an appropriate tool for the summarizing of species data in community ecology. Researchers need to select the effective classification method (s) and the optimum number of clusters to perform a reasonable classification. The aims of the present research are to assess the efficacy of various classification algorithms and to select the optimum number of clusters. We used a dataset of 197 400-m2relev?s recorded from TarbiatModares University research forest located in the north of Iran. For each relev?, a species list and the canopy cover were recorded by using Braun-Blanquet cover-abundance scale modified by van der Maarel. We considered seven classification methods: flexible-β linkage (β=-0.25), Ward\\\\\\\\\\\\\\\'s linka

Analyzing the Biological and Structural Diversity of Hyrcanian Forests Dominated by Taxus baccata L.

Seyed Jalil Alavi, Razieh Veiskarami, Omid Esmailzadeh, Klaus v Gadow
Journal PapersForests , Volume 11 , Issue 6, 2020 June , {Pages 701 }

Abstract

The Hyrcanian Forests, well-known for its World Heritage site in the South Caspian region of Northern Iran, are refugia for a special tree flora. Some areas in particular feature a concentration of large and numerous trees of Taxus baccata, a species that has attracted the interest of many researchers given its medicinal importance. The objective of this study was to analyze the biological and structural features of these unique ecosystems based on three large tree-mapped field plots using new methods. We developed a species abundance distribution and three species–area relations, and analyzed the small-scale structural patterns of each of the 15 tree species that occur in the plots. Species-specific details are presented for each of the

Environmental factors affecting the presence of Edible Zarde-Kija mushroom (Cantharellus alborufescens) in plain forest of Noor (Mazandaran)

Gh A Parad, KOUCHAKSARAEI M TABARI, NEJHAD M GHOBAD, O ESMAILZADEH, H Yousefzadeh
Journal Papers , Volume 12 , Issue 100816, 2020 January 1, {Pages 15-Jan }

Abstract

Zarde-Kija mushroom (Cantharellus alborufescens) is one of the edible mushrooms belong to the Cantharellaceae family. It is widely distributed in the northern forests of Iran and is desirable for local residents in these areas. Despite the economic importance of this genus, litthe is known about their habitat requirements. This study was conducted to identify the environmental factors affecting the distribution of this mushroom in a plain forest of Noor city (Mazandaran province, northern Iran) with 120 ha area. For this purpose, 20 pair plots (20 m? 20 m) with at least 100 m distance were established (20 plots with Cantharellus and 20 non-Cantarellus plots). To analyze the speciesenvironment relationship (soil characteristics), three group

Diversity and Gradient Analysis of Common Yew (Taxus Baccata L.) Communities in Eastern Hyrcanian Forests, Northern Iran

Omid Esmailzadeh, Meysam Soofi, Pari Karami
Journal Papers , 2020 August 7, {Pages }

Abstract

Aims: To outline syntaxonomical synthesis of yew (Taxus baccata L.) in the eastern of Hyrcanian forest and to identify their main environmental gradients.Location: Jahan-Nama protected area (JNPA) as a unique yew population with heterogeneous oristically composition in the east of Hyrcanian forests, Northern Iran.Methods: Vegetation units were classi ed using modi ed TWINSPAN and were translated into syntaxonomic system. Syntaxa were determined by re-arrangement of each relev? based on diagnostic species occurrences and expert knowledge with the aim to increase the oristic distinctiveness of vegetation units. Syntaxa were nally evaluated by diagnostic species and environmental parameters according to phi-values and ANOVA, respectively. DCA

Model Humus forms changes in the beech and hornbeam stands in the old growth and managed forest (Case study: Shast-kalate forest of Gorgan)

Masoomeh Saeghi, Hashem Habashi, Omid Esmailzadeh, Jahangir Mohamadi, Tojtam Sajedi
Journal PapersJournal of Forest Research and Development , Volume 6 , Issue 3, 2020 January , {Pages 429-444 }

Abstract

Evaluation of Beta diversity indices in identifying vegetation differences of Buxus hyrcana plant communities in the Hyrcanian Forests

Seyedeh Fatemeh Hosseini, Hamed Asadi, Hamid Jalilvand, Omid Esmailzadeh
Journal Papers , Volume 8 , Issue 15, 2020 January 1, {Pages 146-155 }

Abstract

The Increase in studies of beta diversity has led to several measures and methods. The variety of theses indicators cause their use in confusion. The aim of this study was to evaluate and determine the relationships between 18 different beta diversity indices based on presence and absense data. For this purpose, Buxus hyrcana database in Golestan and Mazandaran provinces was used. Clustering results showed that these 18 indices classified into 4 distinct groups with similar performance. Evaluation of clustering results by Detrended correspondence analysis (DCA) analysis showed that the indices of the four groups of cluster analysis can be separated into three distinct groups. From basis of combined results of discriminant analysis and Braun

Classification of box tree plant communities (Buxus hyrcana Pojark.) In the Cheshmeh bolbol forest (Bandar Gaz Golestan)

ّFarhad Khabbazi, Omid Esmailzadeh
Journal PapersJournal of Forest Research and Development , Volume 6 , Issue 3, 2020 January , {Pages 491-503 }

Abstract

Analyzing the response curves of box tree (Buxus hyrcana Pojark.) species in relation to environmental variables in Hyrcanian forests

SJ ALAVI, O ESMAILZADEH
Journal Papers , , {Pages }

Abstract

Introducing plant associations of Qalajeh protected area and their relation with environmental factors.

MN Paykani, H Ejtehadi, Y Asri, O Esmailzadeh
Journal PapersIranian Journal of Forest and Poplar Research , Volume 27 , Issue 3, 2019 January , {Pages }

Abstract

In this study, the Qalajeh protected area in the Kermanshah Province (Iran iran Subject Category: Geographic Entities

Feasibility of cryopreservation of Persian silk tree (Albizia julibrissin Durazz.) seeds

S Sakhavat, O ESMAILZADEH, M JEBELLI
Journal Papers , Volume 27 , Issue 15300600, 2019 January 1, {Pages 71-85 }

Abstract

Persian Silk tree (Albizia julibrissin Durazz.) is one of the native leguminous species in plain and lowland hyrcanian forests, which has been severely damaged by fungal disease. In this research, feasibility of preservation of A. julibrissin seeds in cryo condition was studied. Seeds of A. julibrissin were collected from 10 trees in lowland forests of western part of Haraz watershed, Mazandaran province, Iran. Seed germination characteristic of this species were analyzed in cryopreservation with four pretreatments including: vitrification solutions, 30% glycerol, desiccation and without cryoprotectants as well as control treatment, storage in dry condition at 15 C temperature. Seeds after one week and one month storage in liquid nitrogen c

Supervised classification of Buxus hyrcana plant communities using artificial neural network

F Khabazi, O ESMAILZADEH, A NAJAFI
Journal Papers , Volume 11 , Issue 3, 2019 January 1, {Pages 387-400 }

Abstract

In this research, the application of Artificial Neural Network or MLP method in the process Assignment of relev?-groups/plant communities allocation was evaluated using Buxus hyrcana forests database. For this purpose, firstly, the ecological and sociological groups of B. hyrcana were determined using TWINSPAN and Braun-Blanquet method, respectively. The results of both numerical and expert based classification dendrogram of the B. hyrcana communities, which included seven levels of classification as primary groups/plant communities, were introduced to MLP. Then, with assignments in three sets of training (70%), test (15%) and validation (15%), the MLP classification was performed on each level of the two dendrograms. The results showed tha

Studying the interaction between English yew (Taxus baccata L.) adult trees and its regeneration in Afratakhteh Forest Reserve, Golestan province

A Hesabi, SJ Alavi, O Esmailzadeh
Journal Papers , Volume 11 , Issue 200818, 2019 January 1, {Pages 165-177 }

Abstract

Understanding the underlying mechanisms for tree species regeneration, as well as the positive and negative interaction between tree species and regeneration can improve the effectiveness of forest management and restoration activities. English yew, as one of the rare and valuable native species in Hyrcanian forests, Iran, has declined over the past several decades for many reasons such as lack of regeneration in existing populations. This research aims at studying the spatial pattern of English yew regeneration and its interaction with adult trees. For this purpose, the location of all English yew trees and its regeneration was recorded using TP360 device and distance-azimuth method in the Afratakhteh Forest Reserve, Golestan province. Tot

Analyzing the ecological niche of Buxus hyrcana Pojark in relation to some environmental variables in the northern forests of Iran

S Habibi Kilak, SJ Alavi, O Esmailzadeh
Journal PapersForest and Wood Products , Volume 72 , Issue 1, 2019 May 22, {Pages 21-31 }

Abstract

By determining the environmental factors affecting the plant species in a particular site, the presence of the species in the site can be predicted. The aim of this study was to investigate the response of Buxus to environmental variables individually and to extract its ecological optimum and amplitude in relation to the most important environmental factors using HOF function. This study has been done in the major sites of Buxus hyrcana in the Hyrcanian forests. 834 sample plots (400 m2) were established by systematic-selective method and within each plot, the presence of this species, topographic factors and some soil variables were recorded and measured. Fitting the response curve to the environmental variables with HOF function showed th

دروس نیمسال جاری

  • دكتري
    بوم شناسي كمي جنگل ( واحد)
    دانشکده منابع طبیعی و علوم دریایی، گروه جنگلداري
  • دكتري
    بوم شناسي كمي جنگل ( واحد)
  • كارشناسي ارشد
    جامعه شناسي گياهي جنگل ( واحد)
  • كارشناسي ارشد
    جامعه شناسي گياهي جنگل ( واحد)

دروس نیمسال قبل

  • كارشناسي ارشد
    اكولوژي و تكنولوژي بذور درختان جنگلي ( واحد)
    دانشکده منابع طبیعی و علوم دریایی، گروه جنگلداري
  • كارشناسي ارشد
    اكولوژي و تكنولوژي بذور درختان جنگلي ( واحد)
  • كارشناسي ارشد
    اندازه گيري و نقشه سازي گياهي ( واحد)
  • كارشناسي ارشد
    اندازه گيري و نقشه سازي گياهي ( واحد)
  • 1394
    كرمي كردعليوند, پري
    طبقه بندي جوامع گياهي سرخدار در جنگل هاي هيركاني شرقي
  • 1395
    همت زاده, اعظم
  • 1- مربی دانشکده منابع طبیعی دانشگاه علوم کشاورزی و منابع طبیعی ساری از سال 1383 تا 1390
  • استادیار دانشکده منابع طبیعی دانشگاه تربیت مدرس از سال 1390
  • عضو كميته تخصصي گروه علوم و مهندسی جنگل از سال 1390
  • عضو كميته تخصصي گروه مرتعداری از سال 1391 تا 1397
  • عضو شوراي پژوهشي دانشكده منابع طبيعي و علوم دريايي از سال 1392 تا 1393
  • مدیر گروه علوم و مهندسی جنگل از سال 1396تا 1398
    داده ای یافت نشد

مهم

جدید

    اطلاعیه ای درج نشده است