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بررسی مقدماتی کارایی تابع O-ring در تعیین الگوی مکانی و کنش متقابل گونهها در مقیاس کوچک (مطالعه موردی: جنگلهای باینگان کرمانشاه) | ||
| تحقیقات جنگل و صنوبر ایران | ||
| مقاله 8، دوره 20، شماره 4 - شماره پیاپی 50، دی 1391، صفحه 621-608 اصل مقاله (477.96 K) | ||
| نوع مقاله: علمی- پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijfpr.2012.107471 | ||
| نویسندگان | ||
| مهسا کریمی1؛ محمدرضا پورمجیدیان2؛ حمید جلیلوند3؛ امیر صفری* 3 | ||
| 1دانشجوی کارشناسی ارشد، گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 2دانشیار، گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 3دانش آموختۀ کارشناسی ارشد، گروه جنگلداری، دانشکده منابع طبیعی | ||
| چکیده | ||
| هدف این پژوهش بررسی مقدماتی کارایی تابع O-ring در تعیین کنش متقابل و الگوی مکانی درختان در جنگلهای زاگرس در مقیاس کوچک است. مطابق با هدف تحقیق که آزمون کارایی تابع O-ring بود عرصهای به مساحت 2 هکتار در جنگلهای باینگان انتخاب و موقعیت مکانی تمامی درختان بلوط ایرانی و بنه بهعنوان گونههای غالب در قطعه مورد بررسی با استفاده از روش فاصله تا خطوط موازی تعیین و در نهایت نقشه مکانی درختان تهیه شد. از تابع دومتغیره O-ring برای بررسی کنش متقابل و از تابع تکمتغیره O-ring برای مطالعه الگوی مکانی قطعه مورد مطالعه در فواصل مختلف استفاده شد. نتایج این تحقیق توانایی تابع O-ring در کشف الگوی مکانی و کنش متقابل مختلط در طول فواصل مختلف را نشان داد، دلیل این تغییرات به محدودیت پراکنش بذر، رقابت بینگونهای، قدرت بالای زادآوری بلوط (از طریق بذر و پاجوش) و اختلاف در کیفیت رویشگاه در مقیاس کوچک نسبت داده میشود. نتایج تحقیق بیانگر تشریح مناسب الگوی مکانی و کنش متقابل بهوسیله تابع O-ring در توده مورد بررسی است که میتواند بهعنوان یک کلید راهنما در شناخت و تصمیمگیری برنامههای مدیرتی و دخالتهای جنگلشناسی مفید در دیگر رویشگاهها باشد. | ||
| کلیدواژهها | ||
| بلوط ایرانی؛ بنه؛ روش فاصله تا خطوط موازی؛ تابع دو متغیره؛ تابع تک متغیره؛ بذر | ||
| عنوان مقاله [English] | ||
| Preleminary study for application of O-ring function in determination of small-scale spatial pattern and interaction species (Case study: Bayangan forests, Kermanshah) | ||
| نویسندگان [English] | ||
| Mahsa Karimi1؛ Mohammad Reza Pormajidian2؛ Hamid Jalilvand3؛ Amir Safari3 | ||
| 1MSc Student, Dept. of Forestry, Faculty of Natural Resources | ||
| 2Associate Pof, Dept. of Forestry, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University | ||
| 3MSc. Graduated, Dept. of Forestry, Faculty of Natural Resources, University of Kurdistan | ||
| چکیده [English] | ||
| Aim of this study was to investigate O- ring application function to study tree species interaction and spatial pattern in the Zagros forest. According to the aim of this study that was testing O-ring function, the size of two-hectare plot (200m×100m) in Bayangan forest was selected; and full callipering method was surveyed. Coordinates of all Manna oak (Quercus brantii lindl.) and Wild pistachio (Pistacia atlantica Desf.) trees, as two dominant species in studied plot, by distance-to-parallel lines method were determined. Finally, stem-mapped trees prepared. We used O-ring bivariate function to investigate interaction between tree species in studied plot, also O-ring univariate function was used to analyze spatial pattern in the different scales. Results showed the ability of O- ring function for determination of mixed spatial and association patterns in different distances. The proof of this spatial variety forms are seed dispersal limitation, inter-specific, high vigor germination of Q. brantii and quility diffrence small scale in plot studied. Moreover, the results showrd that the O-ring functions describe spatial pattern and interaction as well as in the diffrent scales. This method, could be useful as a key to recognize and to decision making for management programs and silviculture interventions. | ||
| کلیدواژهها [English] | ||
| manna oak, wild pistachio, distance-to-parallel lines method, univariate and bivariate functions, seed | ||
| مراجع | ||
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