ارزیابی الگوی پراکنش مکانی گونه‌های درختی و درختچه‌ای در جنگل‌های زاگرس مرکزی (پژوهش موردی: ذخیره‌گاه جنگلی چهارطاق)

Abstract

<span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">موقعیت مکانی و اندازه ارتفاع و تاج تمام درختان و درختچه‌های متعلق به پنج گونه ارس، برودار، زبان‌گنجشک، کیکم و زالزالک روییده در کنار یکدیگر در وسعتی برابر 53 هکتار از ذخیره‌گاه جنگلی چهارطاق در زاگرس مرکزی اندازه‌گیری شدند. الگو‌های پراکنش پایه‌های هر گونه توسط چهار شاخص </span><span style="font-size: 10.0pt; line-height: 85%; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" dir="LTR">C</span><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">، هینز، ابرهارت، پیلو و جانسون- زیمر محاسبه شدند. در کنار این شاخص‌ها، تخمین بصری و شاخص رشد آزاد (نسبت اندازه مساحت تاج به ارتفاع گیاه) نیز برای تفسیر نتایج و تعیین صحت نتایج بکار گرفته شدند. نتایج نشان داد که پراکنش پایه‌های زبان‌گنجشک کاملاً از الگوی تصادفی پیروی می‌کند و افراد دو گونه بلوط ایرانی (برودار) و زالزالک کاملاً کپه‌ای پخش شده‌اند. تفاوت الگوی پراکنش پیش‌بینی</span><strong><span style="font-size: 13.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">‌</span></strong><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">شده برای دو گونه دیگر توسط شاخص‌های مختلف، متفاوت بود. عامل</span><strong><span style="font-size: 13.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">‌</span></strong><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">هایی چون تراکم کم کیکم و کنترل اپی</span><strong><span style="font-size: 13.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">‌</span></strong><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">‌نستیک زیاد ارس به</span><strong><span style="font-size: 13.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">‌</span></strong><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">عنوان عامل</span><strong><span style="font-size: 13.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">‌</span></strong><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">های عدم</span><strong><span style="font-size: 13.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">‌</span></strong><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">قطعیت تعیین نوع پراکنش این دو گونه ارائه شدند. در بین شاخص‌های موردمطالعه، شاخص الگوی پراکنش </span><span style="font-size: 10.0pt; line-height: 85%; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" dir="LTR">C</span><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA"> مناسب‌ترین شاخص توضیح</span><strong><span style="font-size: 13.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">‌</span></strong><span style="font-size: 11.0pt; mso-ansi-font-size: 9.0pt; line-height: 85%; font-family: 'B Badr'; position: relative; top: -2.0pt; mso-text-raise: 2.0pt;" lang="FA">دهنده پخشیدگی درختان برای منطقه مذکور بود.</span> -Abdollah Poor, M. and Saydin Navadeh, H., 1996. 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