الگوی مکانی و کنش متقابل دارمازو (Quercus infectoria Oliv.) و وی‎ول (Q. libani Oliv.) در دو توده کمتر دست‎خورده و تخریب‎شده (مطالعه موردی: جنگل‎های خدرآباد سردشت)

نوع مقاله : علمی- پژوهشی

نویسندگان

1 دانشجوی کارشناسی ‎ارشد، گروه جنگل‌داری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان

2 دانشیار، گروه جنگل‌داری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرم‌آباد

3 دانشجوی دکتری، گروه جنگل‌داری، دانشکده منابع طبیعی و علوم دریایی نور، دانشگاه تربیت مدرس

چکیده

الگوی پراکنش مکانی و کنش متقابل بین گونه‎های گیاهی برای درک روابط بین‌گونه‌ای و گونه‎- محیط از اهمیت به‌سزایی برخوردار است. باتوجه به اهمیت جنگل‌های زاگرس و نقش مطالعات الگوی پراکنش مکانی در شناخت و مدیریت رویشگاه‌های جنگلی، پژوهش پیش‌رو به بررسی الگوی پراکنش مکانی دو گونه دارمازو (Quercus infectoria Oliv.)و وی‌ول(Quercus libani Oliv.) پرداخت. در جنگل‎های خدرآباد آذربایجان غربی دو توده تخریب‌شده و کمتر دست‌خورده هر کدام به مساحت پنج هکتار انتخاب شده و آماربرداری صددرصد شدند. مختصات دکارتی همه درختان موجود در هر دو توده محاسبه و درنهایت نقشه مکانی ترسیم شد. به‌منظور تحلیل الگوهای پراکنش مکانی و کنش متقابل گونه‌ها از تابع K رایپلی استفاده شد. نتایج نشان داد که الگوی مکانی در توده کمتر دست‎خورده با استفاده از تابع  برای دارمازو کپه‎ای و برای وی‎ول کپه‎ای متمایل به تصادفی و با استفاده از تابع  برای هر دو گونه کپه‎ای متمایل به تصادفی بود. الگوی مکانی در توده تخریب‎شده نیز برای هر دو گونه با استفاده از هر دو تابع به‌صورت کپه‎ای بود. در توده کمتر دست‎خورده با استفاده از هر دو تابع، کنش متقابل دو گونه مورد بررسی در مقیاس‎های کوچک جاذبه بود و در مقیاس‌های بزرگ‎تر حضور گونه‎ها به‌صورت مستقل از هم درآمد. شکل کنش در توده تخریب‎شده با استفاده از هر دو تابع در همه مقیاس‎ها به‌صورت جاذبه‌ای بود، بنابراین توصیه می‌شود در جنگل‎کاری‎های احیایی از آمیختگی فردی استفاده شود.

کلیدواژه‌ها

عنوان مقاله [English]

Comparison of spatial patterns and interspecific association of Gall oak (Quercus infectoria Oliv.) and Lebanon oak (Q. libani Oliv.) in two less degraded and degraded oak stands in northern Zagros (Case study: Khedr Abad, Sardasht)

نویسندگان [English]

  • Karim Biabani 1
  • Babak Pilevar 2
  • Amir Safari 3
1 M.Sc. Student, Department of Forestry, Faculty of Agriculture and Natural Resources, Lorestan University
2 Associate Prof., Department of Forestry, Faculty of Agriculture and Natural Resources, Lorestan University
3 Ph.D. Student, Department of Forestry, Faculty of Natural Resources and Marine Sciences, Tarbiat Modares University
چکیده [English]

Spatial pattern and interspecific association between plant species are two important measures for understanding relation between species and their surrounding environment. Regarding the importance of Zagros forests as well as the role of spatial patterns in forest management, this study aimed to investigate spatial patterns of two important species “Quercus infectoria Oliv. and Q. libani Oliv.” in northern Zagros forest. Two forest stands of 5 ha each located in Khedr Abad of West Azerbaijan province were fully calipered. Cartesian coordinates for all trees location were computed and the trees locations were mapped for both stands. Riply’s K function and L(r) and O (r) statistics were used to analyze spatial patterns and interspecific association between plant species. Results showed a clumped pattern for Q. infectoria in less degraded stand using L(r) statistics, while Q. libani tended to random pattern. Using O (r) statistics, the spatial pattern for both species in less degraded stand were clumped that tended to random. However, both species showed a clumped pattern in degraded stand using both statistics. Bivariate statistical analysis showed a positive association between the two species at small scales in less degraded stand, whereas at larger scales the species were independent. Furthermore, the two species were positively correlated at all scales as shown by both statistics. Based on the results, mixed tree plantation is recommended to restore degraded stands via reforestation programs.

کلیدواژه‌ها [English]

  • L(r) and O (r) statistics
  • northern Zagros
  • Riply’s K function

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