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بررسی الگوی مکانی بنه با استفاده از زاویه بین درختان در جنگلهای جوانرود کرمانشاه | ||
| تحقیقات جنگل و صنوبر ایران | ||
| مقاله 16، دوره 22، شماره 2 - شماره پیاپی 56، شهریور 1393، صفحه 347-357 اصل مقاله (264.21 K) | ||
| نوع مقاله: علمی- پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfpr.2014.11158 | ||
| نویسندگان | ||
| امیر صفری* 1؛ رضاحسین حیدری2؛ نقی شعبانیان3؛ مهسا کریمی1 | ||
| 1دانشجوی دکتری جنگلداری | ||
| 2استادیار دانشگاه رازی کرمانشاه | ||
| 3استادیار دانشگاه کردستان | ||
| چکیده | ||
| الگوی مکانی یکی از ویژگیهای کلیدی اکوسیستمهای جنگلی است که بههمراه ترکیب و ساختار، عملکرد و خودتنظیمی جنگل را کنترل میکند. با توجه به اهمیت اقتصادی و زیستمحیطی گونه بنه و نقش الگوی مکانی درختان در مدیریت جنگل، در این تحقیق الگوی مکانی بنه مورد بررسی قرار گرفت. در این پژوهش که در قسمتی از جنگلهای جوانرود در استان کرمانشاه انجام شد، از اندازهگیری زاویه بین درختان برای تعیین الگوی مکانی استفاده شد. بدینمنظور، عرصهای بهمساحت 50 هکتار انتخاب و 50 نقطه نمونهبرداری در طرح نمونهبرداری تصادفی- منظم در قالب شبکه آماربرداری 100×100 متر برداشت و در هر نقطه زاویههای موردنیاز برای محاسبه شاخصهای (Winkelmass) Wi و (Mean of Angle) MoA برداشت شد. نتایج نشان داد که الگوی بنه در این تحقیق بهشکل کپهای متمایل به تصادفی است و شاخص MoA نیز از دقت لازم برای تعیین الگوی مکانی گونه بنه برخوردار نیست. | ||
| کلیدواژهها | ||
| الگوی مکانی؛ بنه؛ شاخص Wi؛ شاخص MoA؛ جوانرود | ||
| عنوان مقاله [English] | ||
| An investigation of spatial pattern in Pistacia atlantica Desf. stands by angular method in Javanroud region of Kermanshah | ||
| نویسندگان [English] | ||
| Amir Safari1؛ Reza Hossein Heidari2؛ Naghi Shabanian3؛ Mahsa Karimi1 | ||
| 1Ph.D. Student of Forestry, Department of Forestry, Tarbiat Modares University, Noor, I.R. | ||
| 2Assistant Prof., Campus of Agriculture and Natural Resources, Razi University, Kermanshah, I.R. Iran. | ||
| 3Assistant Prof., Department of Forestry, Faculty of Natural Resources, University of Kurdistan, Sanandaj, I.R. Iran. | ||
| چکیده [English] | ||
| In addition to composition and structure, the spatial pattern also plays a key role in forest ecosystems. These three attributes act in constellation by regulating ecosystem functioning and resilience. Regarding the socio-economic importance of Pistachio species, information on the spatial pattern of these trees can be considered as a criterion for management in semi-arid areas of Iran. In this study, the spatial pattern of wild Pistachio (Pistacia atlantica Desf.) was studied. Therefore, a 50-ha areas in Javanroud region was sampled in regular 100×100 m grids with 50 sample plots in a systematic random sampling design. In each sample, angles required for calculating Winkelmass (Wi) and Mean of Angle (MoA) indices were measured. The results showed clumpy pattern of the trees which also tended to random. In addition, the MoA index was shown to be insufficiently inaccurate for estimating the spatial pattern of P. atlantica across the study area. | ||
| کلیدواژهها [English] | ||
| Spatial pattern, Pistacia atlantica, Wi index, MoA index, Javanroud | ||
| مراجع | ||
|
- Akhavan, R., Sagheb-Talebi, K., Hassani, M. and Parhizkar, P. 2010. Spatial patterns in untouched beech (Fagus orientalis Lipsky) stands over forest development stages in Kelardasht region of Iran. Iranian Journal of Forest and Poplar Research, 18(2): 322-336 )In Persian(. - Alavi, S., Zahedi Amiri, Gh. and Marvi Mohajer, M.R. 2006. An investigation of spatial pattern in Wych Elm (Ulmus glabra) in Hyrcanian forests (Case study: Kheyroudkenar forest, Nowshahr, Iran). Iranian Journal of Natural Resources, 58(4): 793-804 )In Persian.( - Baddeley, A. 2010. Analysing spatial point patterns in R. CSIRO and University of Western Australia. Workshop Notes, Version 4.1, 232p. - Basiri, R., Sohrabi, H. and Mozayan, M. 2006. A statistical analysis of the spatial pattern of trees species in Ghamisheleh Marivan region, Iran. Iranian Journal of Natural Resources, 59(2): 579-588 )In Persian.( - Corona, P., Orazio, D.P., Lamonaca, A. and Portoghesi, L. 2005. L’indice Winkelmass per l’inventariazione a fini assestamentali della diversità strutturale di soprassuoli forestali. Forest, 2(2): 225-232. - Dagley, C.M. 2008. Spatial pattern of coast redwood in three alluvial flat old-growth forests in Northern California. Forest Science, 54(3): 294-302. - Erfanifard, Y. and Mahdian, F. 2012. Comparative investigation on the methods of true spatial pattern analysis of trees in forests (Case study: Wild pistachio Research Forest, Fars Province, Iran). Iranian Journal of Forest and Poplar Research, 20(1): 62-73 (In Persian). - Erfanifard, Y., Feghhi, J., Zobeiri, M. and Namiranian, M. 2008. Comparison of two distance methods for forest spatial pattern analysis (Case study: Zagros forests of Iran). Journal of Applied Science, 8(1): 152-157. - Flores, D.Y.A., Tagle, M.A.G., Perez, J.J., Calderon, O.A.A., Garza, E.J.T. and Lareta, B.V. 2012. Stand structure of Pinus hartwegii affected by fire using neighborhood parameters in the Sierra Mader Oriental, Mexico. Tropical and Subtropical Agroecosystem, 15: 377-387. - Fucai, X., Xiuhai, Zh., Chunfang, P., Yuzhen, J. and Jinsong, W. 2010. Stand structure of broad-leaved and Korean pine (Pinus koraiensis) mixed forest in the Changbai Mountains, China. Chinese Journal of Applied Environmental Biology, 16(4): 529-534. - Gray, L. and He, F.L. 2009. Spatial point-pattern analysis for detecting density-dependent competition in a boreal chronosequence of Alberta. Forest Ecology and Management, 259: 98-106. - Haase, P. 1995. Spatial pattern analysis in ecology based on Ripley's K-function: Introduction and methods of edge correction. Journal of Vegetation Science, 6:575-582. - Habashi, H., Hosseini, S.M., Mohammadi, J. and Rahmani, R. 2007. Stand structure and spatial pattern of trees in mixed Hyrcanian beech forests of Iran. Iranian Journal of Forest and Poplar Research, 15(1): 55-64 (In Persian). - Haji Mirza Aghayee, S., Jalilvand, H., Kooch, Y. and Pormajidian, M.R. 2010. Analysis of important value and spatial pattern of woody species in ecological units (Case study: Sardabrood Forests of Chalous). Iranian Journal of Forest, 2(1): 51-60 (In Persian). - Heidari, R.H., Zobeiri, M., Namiranian, M. and Sobhani, H. 2007. Application of T-square sampling method in Zagros Forests. (Case study: Kermanshah Province). Iranian Journal of Forest and Poplar Research, 15(1): 32-42 (In Persian). - Hui, G., Li, L., Zhao, Zh. and Dang, P. 2007. Comparsion of methods in analysis of the tree spatial distribution pattern. Acta Ecologica Sinica, 27(11): 4717-4728. - Jannat Rostami, M., Zare Chahoki, M.A., Azarnivand, H. and Ebrahimi Dorcheh, Kh. 2009. Survey and analysis of spatial pattern of plant species in marginal rangelands Hoz-e-Soltan Qom. Watershed Management Researches (Pajouhesh & Sazandegi), 84: 72-80 (In Persian). - Karimi, M., Pormajidian, M.R., Jalilvand, H. and Safari, A. 2012. Preliminary study for application of O-ring function in determination of small-scale spatial pattern and interaction species (Case study: Bayangan Forests, Kermanshah). Iranian Journal of Forest and Poplar Research, 20(4): 608-621)In Persian.( - Kiani, B., Tabari, M., Fallah, A., Hosseini, S.M. and Iran-nejad Parizi, M.H. 2011. The use of Nearest Neighbor, Mean Square and Ripley’s K- function methods to determine spatial pattern of Saxaul (Haloxylon ammodenderon C.A.Mey) in Siahkooh Protected Area, Yazd Province. Iranian Journal of Forest and Poplar Research, 19(3): 356-369 (In Persian). - Li, L., Huang, Zh., Ye, W., Cao, H., Wei, Sh., Wang, Zh., Lian, J., Sun, I., Ma, K. and He, F. 2009. Spatial distributions of tree species in a subtropical forest of China. Oikos, 118: 495-502. - Li, Y., Hui, G., Zhonghua Zhao, Li, Y.H., Y., Hui, G., Zhao, Zh. and Hu, Y. 2012. The bivariate distribution characteristics of spatial structure in natural Korean pine broad-leaved forest. Journal of Vegetation Science, 23(6): 1180-1190. - Luis, M.D., Raventos, J., Wiegand, T. and Hidalgo, C.H. 2008. Temporal and spatial differentiation in seedling emergence may promote species coexistence in Mediterranean fire-prone ecosystems. Ecography, 31: 620-629. - Mantgem, P.J., Stephenson, N.L., Knapp, E., Battles, J. and Keeley, J.E. 2011. Long-term effects of prescribed fire on mixed conifer forest structure in the Sierra Neveda, California. Forest Ecology and Management, 261: 989-994. - Marin, A., Carrer, D.M. and Lamdica, D.S. 2011. Spatial analysis of a mixed beech, sprue and fir stand in the eastern Alps. M.Sc. thesis, Department of Land, Environment, Agriculture and Forestry, College of Agricultural Sciences, University of Padua, 71p. - Pommerning, A. 2002. Approaches to quantifying forest structures. Forestry, 75(3): 305-324. - Pourreza, M., Shaw, J.D. and Zanganeh, H. 2008. Sustainability of wild pistachio (Pistacia atlantica Desf.) in Zagros Forests, Iran. Forest Ecology and Management, 255: 3667-3671. - Reyburn, A.P. 2011. Causes and consequences of plant spatial patterns in natural and experimental Great Basin (USA) plant communities. Ph.D thesis, Department of Wildland Resources, Utah State University, 162p. - Schmidt, L., Hille, M.G. and Stephens, S.L. 2006. Restoring northern Sierra Nevada mixed conifer forest composition and structure with prescribed fires of varying intensities. Fire Ecology, 2:20-33. - Stoyan, D. and Stoyan, H. 1992. Fraktale Formenpunkt Feldermethoden der geometrie-statistik. Berlin: Akademie-Verlag, 394p. - Trifković, S. and Yamamoto, H. 2008. Indexing of spatial pattern of trees using a mean of angels. Journal of Forest Researches, 3: 117-121. - Safari, A., Shabanian, N., Heidari, R.H., Erfanifard, S.Y. and Pourreza, M. 2010a. Spatial pattern of Manna Oak trees (Quercus brantii Lindl.) in Bayangan forests of Kermanshah. Iranian Journal of Forest and Poplar Research, 18(4): 596-608 (In Persian). - Safari, A., Shabanian, N., Erfanifard, S.Y., Heidari, R.H. and Purreza, M. 2010b. Investigation on spatial pattern of wild pistachio (Pistacia atlantica Desf.) (Case study: Bayangan forests, Kermanshah). Iranian Journal of Forest, 2(2): 177-185 (In Persian). - Stephens, S.L., Fry, D.L. and Franco-Vizcaíno, E. 2008. Wildfire and spatial patterns in forests in northwestern Mexico: the United States wishes it had similar fire problems. Ecology and Society, 13: 10-21. - Wang, T.X., Ding, Y.L. and Liu, Y.J. 2005. The spatial pattern of Arundinaria Fargesii Clone population. Journal of Nanjing Forestry University (Natural Science Edition), 29(3): 37-40. - Zhang, Y., Li, J.M., Chang, Sh.L., Li, X. and Lu, J.J. 2012. Spatial distribution pattern of Picea schrenkiana population in the Middle Tianshan Mountains and the relationship with topographic attributes. Journal of Arid Land, 4(4): 457-468. - Zhao, Zh., Hui, G., Hu, Y., Wang, H., Zhang, G. and Gadow, K. 2014. Testing the significance of different tree spatial distribution patterns based on the uniform angle index. Canadian Journal of Forest Research, 44(11): 1419-1425. | ||
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