بررسی مقدماتی کارایی تابع O-ring در تعیین الگوی مکانی و کنش متقابل گونه‌ها در مقیاس کوچک (مطالعه موردی: جنگل‌های باینگان کرمانشاه)

نوع مقاله : علمی- پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری

2 دانشیار، گروه جنگلداری، دانشگاه علوم کشاورزی و منابع طبیعی ساری

3 دانش 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

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 Karimi 1
  • Mohammad Reza Pormajidian 2
  • Hamid Jalilvand 3
  • Amir Safari 3
1 MSc Student, Dept. of Forestry, Faculty of Natural Resources
2 Associate Pof, Dept. of Forestry, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University
3 MSc. 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

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