Ecological group classification of Crimean juniper (Juniperus excelsa  M.Bieb.) in Haraz Valley, Northern Iran

Document Type : Research article

Authors

1 Corresponding author, Department of Forest Sciences and Engineering, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Tehran, Iran

2 M.Sc. Student of Forestry, Department of Forest Sciences and Engineering, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University, Tehran, Iran

3 Assistance Prof., Nowshahr Botanical Garden, Research Institute of Forests and Rangelands, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran

Abstract

Background and objectives: Vegetation classification is an effective tool for understanding ecological relationships among species, aiding in the planning, monitoring, and management of forest ecosystems. Until now, such studies in Northern Iran have been limited to the deciduous temperate forests of the northern slopes of the Alborz range and the juniper forests in the Firouzkouh Valley on the southern slopes. However, juniper is expanding in some east-west valleys of the Haraz River (specifically, the Siah Beisheh and Punjab Amol regions), adjacent to the deciduous broadleaf Hyrcanian forests, where it forms distinct plant communities. This study presents, for the first time, an ecological classification of Crimean juniper (also known as Greek juniper, Juniperus excelsa M. Bieb.) forests in Haraz Valley (Amol County, northern Iran), located on the northern slope of the Alborz Mountains.
Methodology: A total of 54 sample plots, each 400 m², were established based on the principle of representative stands. Within each plot, all vascular plant species were visually identified and their percent cover estimated using the ordinal van der Maarel cover-abundance scale. Floristic classification was conducted using TWINSPAN based on vegetation cover, and indicator species analysis was performed using the incidence-based phi fidelity method in JUICE software. Differences in ecological units or plant communities based on topographic characteristics were analyzed using one-way ANOVA followed by Duncan post-hoc tests.
Results: Five ecological units or plant communities were identified based on distinct floristic composition and topographic properties: (1) Crimean juniper-Caucasian oak (J. excelsa-Quercus macranthera Fisch. & C.A.Mey.); (2) Crimean juniper-Horned sainfoin (J. excelsa-Onobrychis cornuta (L.) Desv.); (3) Crimean juniper-Judas tree (J. excelsa-Cercis siliquastrum L.); (4) Crimean juniper-common yellow jasmine (J. excelsa- Chrysojasminum fruticans (L.) Banfi); and (5) Crimean juniper-Alder buckthorn (J. excelsa-Rhamnus pallasii Fisch. & C.A.Mey.). The J. excelsa-Q. macranthera group (group 1), due to its association with European-Siberian indicator species, represents a bioclimatic vegetation type on the northern slopes of the Lehar region (Punjab). The J. excelsa-J. fruticans (Group 4) and J. excelsa-C. siliquastrum (Group 3) communities are indicative of Mediterranean climatic conditions in the Siah-Bisheh and Tara regions. Meanwhile, the J. excelsa-O. cornuta (Group 2) and J. excelsa-R. pallasii (Group 5) groups, which also occur on the southern slopes of the Alborz, represent elements of the Iran-Turanian climate in the northern profile.
Conclusion: The findings highlight that Crimean juniper in Haraz Valley is associated with Mediterranean indicator species such as C. siliquastrum, Spiraea crenata L., C. fruticans, Cotoneaster integerrimus Medik., Paliurus spina-christi Mill., Asparagus officinalis L., and Clematis orientalis L., forming several distinct plant communities. The presence of Mediterranean elements, along with some European-Siberian bioclimatic indicators, such as Acer monspessulanum L., A. campestre L., Zelkova carpinifolia (Pall.) K. Koch, Celtis caucasica Willd., and Q. macranthera, emphasizes the marked contrast between J. excelsa communities on the northern and southern slopes of the Alborz. These differences underline the need for greater conservation efforts focused on these newly identified plant communities.
 
 
 
 

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- Akhani H. 2005. The Illustrated Flora of Golestan National Park, Iran. Vol. 1. Tehran: Tehran University Press.
- Ali Ahmad Koroori, S. and Khoshnevis, M., 2000. Ecological and Environmental Studies of the Greek Juniper Habitats of Iran. Published by Research Institute of Forests and Rangelands, Tehran, Iran, 208p (In Persian).
- Alipoorfard, M., Pourtahmasi, K., Raeini Sarjaz, M. and Nadi, M., 2023. Reconstruction of Jan-Mar mean temperature using tree ring widths of Juniper trees in the east of Lorestan province. Iranian Journal of Forest, 15(1): 53-67 (In Persian with English summary).
- Asensi, A., Díez-Garretas, B. and Quézel, P., 2007. Plant communities of Juniperus turbinata Guss. subsp. turbinata in the Mediterranean Region. A biogeographical, bioclimatical and syntaxonomical survey. Phytocoenologia, 37: 599-623.
- Assadi, M. (Ed.), 1988-2021. Flora of Iran, Vols. 1-151. Published by Research Institute of Forests and Rangelands, Tehran, Iran (In Persian).
- Bonari, G., Fernández‐González, F., Çoban, S., Monteiro‐Henriques, T., Bergmeier, E., Didukh, Y.P., ... and Chytrý, M., 2021. Classification of the Mediterranean lowland to submontane pine forest
 
vegetation. Applied Vegetation Science, 24(1): e12544.
- De Cáceres, M. and Legendre, P., 2009. Associations between species and groups of sites: indices and statistical inference. Ecology, 90(12): 3566-3574.
- Dengler, J. 2017. Phytosociology. International Encyclopedia of Geography: People, the Earth, Environment and Technology, 6p.
- Esmailzadeh, O., Hosseini, S.M., Tabari, M. and Asadi, H., 2011. Classification system analysis in classification of forest plant communities (Case study: Darkola's beech forest). Journal of Plant Biology, 3: 11-28 (In Persian with English summary).
- Esmailzadeh, O., Soofi, M. and Darvandand, R., 2022. Predicting environmental variables using vegetation composition. Forest and Wood Products, 75(1): 39-50 (In Persian with English summary).
- Fallah, A., Nadi, M., Imani, M. and Hamidi, S.K., 2023. Reconstruction of precipitation using the chronology of juniper trees (Juniperus polycarpus) in North Khorasan Province, Iran. Iranian Journal of Forest and Poplar Research, 31(1): 1-13 (In Persian with English summary).
- Gholizadeh, H., Naqinezhad, A. and Chytrý, M., 2020. Classification of the Hyrcanian forest vegetation, Northern Iran. Applied Vegetation Science, 23(1): 107-126.‏
- Hamzeh'ee, B., Naqinezhad, A., Attar, F., Ghahreman, A., Assadi, M. and Prieditis, N. 2008. Phytosociological survey of remnant Alnus glutinosa ssp. barbata communities in the lowland Caspian forests of northern Iran. Phytocoenologia, 38: 117-132.
- Karami-Kordalivand, P., Esmailzadeh, O., Willner, W., Noroozi, J. and Alavi, S.J., 2021. Classification of forest communities (co-)dominated by Taxus baccata in the Hyrcanian forests (northern Iran) and their comparison with southern Europe. European Journal of Forest Research, 140(2): 463-476.‏
- Kartoolinejad, D., Ravanbakhsh, H., Fadaei, Z., Moshki, A.R. and Nikouee, E., 2024. Infection of juniper trees (Juniperus excelsa M. Bieb.) to juniper dwarf mistletoe (Arceuthobium oxycedri (DC) M. Bieb.) in forests of Miankouh Tash protected area, Shahroud. Iranian Journal of Forest, 15(4): 497-514 (In Persian with English summary).
- Kavgacı, A., Balpınar, N., Öner, H.H., Arslan, M., Bonari, G., Chytrý, M. and Čarni, A., 2021. Classification of forest and shrubland vegetation in Mediterranean Turkey. Applied Vegetation Science, 24(2): e12589.
- Khabazi, F. and Esmailzadeh, O., 2020. Classification of box tree plant communities (Buxus hyrcana Pojark.) in the Cheshmeh bolbol forest (Bandar Gaz Golestan). Journal of Forest Research and Development, 6(3): 491-503 (In Persian with English summary).
- Kusbach, A., Long, J.N., Van Miegroet, H. and Shultz, L.M., 2012. Fidelity and diagnostic species concepts in vegetation classification in the Rocky Mountains, northern Utah, USA. Botany, 90(8): 678-693.
- Marvi Mohadjer, M. R., 2005. Silviculture, University of Tehran press, 387 pp.  [In Persian].
- Nadjafi-T.Sh. K, Jalili A, Khorasani N, Asri Y, Jamzad Z. 2007. Plant associations of Geno protected area. Pajouhesh & Sazandegi 75: 17-27.
- Naqinezhad, A., Zare-Maivan H., Gholizadeh H. and Hodgson, J.G., 2013. Understory vegetation as an indicator of soil characteristics in the Hyrcanian area, N. Iran. Flora, 208(1): 3-12.
- Naqinezhad, A. and Zarezadeh, S., 2013. Phytosociological survey of Noor and Sisangan lowland Hyrcanian forests Mazandaran province. Journal of Plant Biology, 5: 103-122 (In Persian with English summary).
- Noroozi, J., 2020. Plant Biogeography and Vegetation of High Mountains of Central and South-West Asia. Plant and Vegetation (Vol. 17), Springer, Cham, Switzerland, 360p.
- Noroozi, J., Körner, C., 2018. A bioclimatic characterization of high elevation habitats in the Alborz mountains of Iran. Alpine Botany 128, 1–11 (2018).
- Noroozi, J. and Talebi, A., 2023. Illustrated Flora of Alborz Mountain Range Iran. Published by Ideh Talaei, Tehran, Iran, 580p (In Persian).
- Ravanbakhsh, H. and Assadi, M., 2017. Biodiversity of forest and steppe associations in Juniper (Juniperus excelsa) habitat of southern Alborz (Firuzkooh, Iran). Journal of Plant Research (Iranian Journal of Biology), 30(3): 591-606 (In Persian with English summary).
- Ravanbakhsh, H., Marvie Mohadjer, M.R., Assadi, M., Zobeiri, M. and Etemad, V., 2013. A classification of Juniperus excelsa M.Bieb. communities and analysis of vegetation in relation to environmental variables (Case study: Some parts of Alborz Mountains, Iran). Forest and Wood Products, 66(3): 277-292 (In Persian with English summary).
- Ravanbakhsh, H., Hamzeh’ee, B., Etemad, V., Marvie Mohadjer, M. R., & Assadi, M. (2015). Phytosociology of Juniperus excelsa M.Bieb. forests in Alborz Mountain range in the north of Iran. Plant Biosystems - An International Journal Dealing with All Aspects of Plant Biology, 150(5), 987–1000.
- Rechinger, K.H. (Ed.), 1963-2015. Flora Iranica, Vols. 1-181. Akademische Druck und Verlagsanstalt, Verlag des Naturhistorischen Museum Wien, Graz and Wien, Austria.
- Sabeti, H., 1976. Forests, Trees and Shrubs of Iran. Publication of Agricultural Research Education and Extension Organization, Tehran, Iran, 810p (In Persian).
- Tichý, L., 2002. JUICE, software for vegetation classification. Journal of Vegetation Science, 13: 451-453.
- Tichy, L., 2005. New similarity indices for the assignment of relevés to the vegetation units of an existing phytosociological classification. Plant Ecology, 179(1): 67-72.
- Uğurlu, E., Roleček, J., & Bergmeier, E. (2012). Oak woodland vegetation of T urkey–a first overview based on multivariate statistics. Applied Vegetation Science, 15(4), 590-608.
- Witte, J.P.M., 2002. The descriptive capacity of ecological plant species groups. Plant Ecology, 162: 199-213.