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ارزیابی الگوی پراکنش پایههای خشکیده بلوط ایرانی (Quercus brantii Lindl.) در جنگلهای منطقه تلگاه یاسوج | ||
| تحقیقات جنگل و صنوبر ایران | ||
| مقاله 7، دوره 24، شماره 1 - شماره پیاپی 63، فروردین 1395، صفحه 64-53 اصل مقاله (474.79 K) | ||
| نوع مقاله: علمی- پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfpr.2016.106688 | ||
| نویسندگان | ||
| احسان تقوایی پور1؛ علیرضا صالحی* 2؛ یوسف عسکری3 | ||
| 1دانشجوی کارشناسی ارشد جنگلداری، دانشکده کشاورزی، دانشگاه یاسوج | ||
| 2استادیار، گروه جنگلداری، دانشکده کشاورزی، دانشگاه یاسوج | ||
| 3دانشجوی دکتری جنگلداری، دانشکده منابع طبیعی و علوم زمین، دانشگاه شهرکرد | ||
| چکیده | ||
| در پژوهش پیشرو یک توده جنگلی به وسعت حدود 25 هکتار در منطقه تلگاه در نزدیکی شهر یاسوج برای ارزیابی الگوی پراکنش مکانی درختان خشکیده بلوط ایرانی (Quercus brantii Lindl) بررسی شد. برای جمعآوری اطلاعات کمی و کیفی، از روشهای قطعهنمونه با مساحت ثابت و روش نمونهبرداری خوشهای انطباقی استفاده شد. مشخصات کمی کلیه درختان بلوط خشکیده موجود در منطقه مورد مطالعه با استفاده از 65 قطعهنمونه 10 آری بههمراه مشخصات سایر درختان سالم موجود در قطعات نمونه، آماربرداری شد، بهنحویکه هر درخت خشکیده احتمالی در هر قطعهنمونه، خود مرکز قطعهنمونه دیگری بود. علاوهبر مختصات جغرافیایی درختان خشکیده، قطر برابر سینه، ارتفاع کل و قطر تاج درختان در هر قطعهنمونه اندازهگیری شد. برای کمی کردن الگوی پراکنش درختان خشکیده از شاخصهای جانسون- زیمر، ابرهارت و پیلو که براساس فاصله نقطه نمونهبرداری تا فرد (درخت) استوار هستند و از شاخصهای نسبت واریانس به میانگین، موریسیتا و استانداردشده موریسیتا که برمبنای بهکارگیری قطعات نمونه هستند، استفاده شد. تمام شاخصهای مربوط به قطعهنمونه، الگوی کپهای را برای درختان خشکیده نشان دادند. از میان شاخصهای فاصلهای، شاخص جانسون- زیمر و ابرهارت الگوی کپهای و شاخص پیلو الگوی یکنواخت را نشان دادند. | ||
| کلیدواژهها | ||
| الگوی پراکنش؛ زوال بلوط؛ شاخصهای فاصلهای؛ شاخصهای قطعهنمونه | ||
| عنوان مقاله [English] | ||
| Distribution pattern of declined Brant`s oak (Quercus brantii Lindl.) trees in forests of Tol-e Ghah, Yasuj | ||
| نویسندگان [English] | ||
| Ehsan Taghvayipour1؛ Alireza Salehi2؛ Yousef Askari3 | ||
| 1M.Sc. Student, Department of Forestry, Faculty of Agriculture, University of Yasuj | ||
| 2Assistant Prof., Department of Forestry, Faculty of Agriculture, University of Yasuj | ||
| 3Ph.D. Student, Department of Forest Science, Faculty of Natural Resources and Earth Science, University of Shahrekord | ||
| چکیده [English] | ||
| A forest stand of 25 ha in Tol-e Gah region nearby Yasuj (Kohgiluyeh and Boyer Ahmad province) was selected to assess the spatial distribution pattern of its dead trees of Brant`s oak (Quercus brantii Lindl). The fixed area plot samples and adaptive cluster sampling method were employed to collect qualitative and quantitative information of the forest stand. Using sixty-five, 10-Ar sample plots, quantitative characteristics of all dead trunks together with those for the healthy trees in the sample plots were recorded in a way that each dead trunk found in each of the plots was considered as the center of another sample plot. In addition to determining the geographical coordinates of the dead trunks, diameter at breast height, tree height, and crown diameter of trees were measured. The Johnson-Zimmer, Eberhart, and Pielou indices (based on the distance of the sampling spot to the individual trees) and the variance to mean ratio, Morisita index, and standardized Morisita indices (efficient in using plot samples) were applied to quantify the distribution pattern of dead trees. All sample plot-related indices indicated a clumping distribution pattern for the dead trees. Among the distance indices, the Johnson-Zimmer and Eberhart indices also showed a clumping and a uniform pattern of dead tree distribution, respectively. | ||
| کلیدواژهها [English] | ||
| Distribution pattern, oak decline, distance indices, sample plot indices | ||
| مراجع | ||
|
- Anonymous, 2014. Climatic data. Meteorological Administration of Iran, http://www.chaharmahalmet.ir/iranarchive.asp. - Askari, Y., Soltani, A. and Sohrabi, H., 2014. Evaluation of spatial distribution pattern of tree and shrub species in a central Zagros (Case study: Chahartagh forest reserve). Iranian Journal of Forest and Poplar Research, 22(2): 175-187 (In Persian). - Calviño-Cancela, M., 2002. Spatial patterns of seed dispersal and seedling recruitment in Corema album (Empetraceae): the importance of unspecialized dispersers for regeneration. Journal of Ecology, 90(5): 775-784. - Dale, M.R.T. and Powell, R.D., 2001. A new method for characterizing point patterns in plant ecology. Journal of Vegetation Science, 12: 597-608. - Das, A.J., Battles, J., van Mantgem, P.J. and Stephenson, N.L., 2008. Spatial elements of mortality risk in old-growth forests. Ecology, 89: 1744-1756. - Dewyer, J.M., Fensham, R.J., Fairfax, R.J. and Buckley, Y.M., 2010. Neighborhood effects influence drought-induced mortality of savanna trees in Australia. Journal of Vegetation Science, 21(3): 573-585. - Dong, HW., Xiu-mei, G. and Lin-feng, G., 2001. Spatial pattern of dominant tree species of the secondary monsoon rain forest in Linjiang, Gaungdong Province. Journal of Forestry Research, 12(2): 101-104. - Everham, E.M. and Brokaw, N.V.L., 1996. Forest damage and recovery from catastrophic wind. Botatical Review, 62(2): 113-185. - Franklin, J.F., Michaelsen, J. and Strahler, A.H., 1985. Spatial analysis of density dependent pattern in coniferous forest stands. Vegetation, 64: 29-36. - Franklin, J.F., Shugart, H.H. and Harmon, M.E., 1987. Tree death as an ecological process. Bioscience, 37: 550-556. - Hamzehpour, M., Kia-daliri, H. and Bordbar, K., 2011. Preliminary study of manna oak (Quercus brantii Lindl.) tree decline in Dashte-Barm of Kazeroon, Fars province. Iranian Journal of Forest and Poplar Research, 19(2): 352-363 (In Persian). - Harmon, M.E., Franklin, J.F., Swanson, F.J., Sollins, P., Gregory, S.V., Lattin, J.D., Anderson, N.H., Cline, S.P., Aumen, N.G., Sedell, J.R., Lienkaemper, G.W., Cromack, K.J. and Cummins, K.W., 1986. Ecology of coarse woody debris in temperate ecosystems. Advances in Ecological Research, 15: 133-302. - Heidari, R.H., 2008. Distance Sampling Methods in Forest Inventory. Razi University Press, Kermanshah, 121p (In Persian). - Hutchinson, GE., 1978. An Introduction to Population Biology. Yale University Press, USA, 260p. - Jenkins, M.A. and Pallardy, S.G., 1995. The influence of drought on red oak group species growth and mortality in the Missouri Ozarks. Canadian Journal of Forest Research, 25: 1119-1127. - Johnson, R.B. and Zimmer, W.J., 1985. A more powerful test for dispersion using distance measurements. Ecology, 66(5): 1669-1675. - Kint, V., Robert, D.W. and Noël, L., 2004. Evaluation of sampling methods for the estimation of structural indices in forest stands. Ecological Modelling, 180(4): 461-476. - Krebs, C.J., 1999. Ecological Methodology. Addison-Welsey Educational Publisher, Benjamin, 581p. - Lamont, B.B. and Fox, J.E.D., 1981. Spatial pattern of six sympatric leaf variants and two size classes of Acacia aneura in a semi-arid region of western Australia. Oikos, 37: 73-79. - Lei, W., Chunyu, Z. and Xiuhai, Z., 2009. Spatial pattern of Korean pine broadleaved forest in Changbai mountains. Scientia Silvae Sinicae, 5: 54-59. - Lin, Y., Hulting, M.L. and Augspurger, C.K., 2004. Causes of spatial patterns of dead trees in forest fragments in Illinois. Plant Ecology, 170: 15-27. - McCune B., Cloonan, C.L. and Armentano, T.V., 1988. Tree mortality rates and vegetation dynamics in Hemmer Woods, Indiana. American Midland Naturalist, 120: 416-431. - Moeur, M., 1993. Characterizing spatial patterns of trees using stem-mapped data. Forest Science, 39(4): 756-775. - Moghaddam, M.R., 2001. Statistical and Descriptive Ecology of Vegetation. Tehran University Press, Tehran, 285p )In Persian(. - Morisita, M., 1962. I-δ Index a measure of dispersion of individuals. Research Population Ecology, 4(1): 1-7. - Muller, R.N. and Liu, Y., 1991. Coarse woody debris in an old-growth deciduous forest on the Cumberland Plateau, south-eastern Kentucky. Canadian Journal Forest Research, 21: 1567-1572. - Myers, J.H., 1978. Selecting a measure of dispersion. Environment Entomology, 7(5): 619-621. - Oliver, C.D. and Larson, B.C., 1996. Forest Stand Dynamics. John Wiley and Sons, New York, 467p. - Payandeh, B., 1970. Comparison of methods for assessing spatial distributions of trees. Forest Science, 16(3): 312-317. - Pielou, E.C., 1969. An Introduction to Mathematical Ecology. Wiley-Interscience, New York, 286p. - Pommerening, A., 2002. Approaches to quantifying forest structures. Forestry, 75(3): 305- 324. - Runkle, J.R. 1985. Disturbance regimes in temperate forests: 17-33. In: Pickett, S.T.A. and White, P.S., (Eds.). The Ecology of Natural Disturbance and Patch Dynamics. Academic Press, 720p. - Runkle, J.R., 1990. Gap dynamics in an Ohio Acer-Fagus forest and speculations on the geography of disturbance. Canadian Journal of Forest Research, 20: 632-641. - Safari, A., Shabanian, N., Erfanifard, Y., Heidari, H. and Purreza, M., 2010. Investigation of spatial pattern of wild pistachio (Pistacia atlantica Desf) in Bayangan forests, Kermanshah. Iranian Journal of Forest, 2(2): 177-185 )In Persian(. - Shahsavari, H., Mataji, A. and Akhavan, R., 2009. Determination of spatial patterns and different types of dead trees in managed and un-managed beech forests of Iran. Journal of Sciences and Techniques in Natural Resources, 4(1):11-18 )In Persian(. - Thompson, S.K., 1990. Adaptive cluster sampling. Journal of the American Statistical Association, 85: 1050-1059. | ||
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