Plant Ecosystem Conservation
حفاظت زیست بوم گیاهان
PEC
Agriculture
http://pec.gonbad.ac.ir
1
admin
2476-3462
10
8
10.22034/pec
14
8888
13
fa
jalali
1400
7
1
gregorian
2021
10
1
9
18
online
1
fulltext
fa
بررسی الگوی غنا و تنوع اشکوب علفی در گرادیان ارتفاعی جنگل های زاگرس (مطالعه موردی: جنگلهای بلوط ایرانی- تاف خرمآباد)
Pattern of understory species richness and diversity along an altitudinal gradient in Persian oak (Quercus brantii Lindl.) forests
تخصصي
Special
پژوهشي
Research
<strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">درک الگو</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> مکان</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> تنوع و غنا گونه ­ا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> و عوامل موثر بر آن نتا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ج مهم</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> برا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> حفظ و مد</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ر</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ت تنوع ز</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ست</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> ارائه م</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">­دهد. در پژوهش حاضر تغ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">یی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رات شاخص­ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> غنا و تنوع گونه ­ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> علف</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> در طول گراد</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ان ارتفاع</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> (700 متر) جنگل ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> بلوط ا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ران</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> (</span></span></strong><strong><em><span dir="LTR"><span style="font-family:Times New Roman,serif;"><span style="font-size:10.0pt;">Quercus brantii</span></span></span></em></strong><strong><span dir="LTR"><span style="font-family:Times New Roman,serif;"><span style="font-size:10.0pt;"> Lindl</span></span></span></strong><strong><span dir="LTR"><span style="font-family:Times New Roman,serif;">.</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">) تاف شهرستان خرم­آباد بررس</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> شد. بد</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ن منظور در هر طبقه ارتفاع</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">100 متر</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> از دو قطعه نمونه 500 مترمربع</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> مستط</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ل</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> با توز</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ع تصادف</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> برا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> اندازه­ گ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ر</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> و</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ژگ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">­ ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> ف</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ز</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">وگراف</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">، متغ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> خاک</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> و درصد تاج­ پوشش اشکوب درخت</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> استفاده شد. در هر قطعه نمونه ن</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ز از 3 ز</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ر قطعه­ نمونه چهار مترمربع</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> تصادف</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> برا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> برداشت اشکوب علف</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> استفاده شد. پس از اندازه­ گ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ر</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">­ ها، تغ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">یی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رات غنا و تنوع گونه ­ا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> با استفاده از تحل</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ل همبستگ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> بررس</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> و مهمتر</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ن مولفه­ ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> مح</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ط</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> تاث</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رگذار ن</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ز با استفاده از تجز</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ه مولفه­ ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> اصل</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> (</span></span></strong><strong><span dir="LTR"><span style="font-family:Times New Roman,serif;"><span style="font-size:10.0pt;">PCA</span></span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">) مشخص شدند. طبق نتا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ج ب</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ن شاخص ­ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> غنا، تنوع و </span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">کنواخت</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> با تغ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">یی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رات ارتفاع و ش</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ب ارتباط معن</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">­ دار</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> مشاهده نشد، در حال</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی </span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">که ب</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ن شاخص­ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> تنوع و </span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">کنواخت</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> با م</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">زان تاج ­پوشش همبستگ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> منف</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> مشاهده شد. برخلاف عدم رابطه ب</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ن شاخص­ ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> تنوع و </span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">کنواخت</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> با متغ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> خاک</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">، شاخص­ ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> غنا با م</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">زان رس و س</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">لت همبستگ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> مثبت و با مقاد</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ر کربن آل</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">، پتاس</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">م، ن</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">تروژن و ماسه همبستگ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> منف</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> نشان دادند. نتا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ج </span></span></strong><strong><span dir="LTR"><span style="font-family:Times New Roman,serif;"><span style="font-size:10.0pt;">PCA</span></span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> ن</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ز مقاد</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ر پتاس</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">م، فسفر، کربن آل</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">، رطوبت اشباع، اس</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">د</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ته، ارتفاع از سطح در</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ا و تاج ­پوشش را مهم­تر</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ن عوامل تاث</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رگذار منطقه نشان داد. بنابرا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ن عل</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">­رغم عدم وجود الگو</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> مشخص در شاخص ­ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> غنا و تنوع گونه­ا</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">، م</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">زان تاج پوشش از عوامل تاث</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رگذار بر شاخص­ ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> تنوع و </span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">کنواخت</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> و متغ</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> خاک</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> از عوامل تاث</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">رگذار بر شاخص­ ها</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;">ی</span></span></strong><strong><span style="font-family:B Nazanin;"><span style="font-size:10.0pt;"> غنا در منطقه است.</span></span></strong><strong><span dir="LTR"><span style="font-family:Times New Roman,serif;"><span style="font-size:10.0pt;"></span></span></span></strong>
<strong>To manage and conserve biodiversity, comprehensive knowledge of spatial patterns of species richness and diversity and effective factors on them is necessary. The changes of diversity and richness indices at an altitudinal gradient (700 meters) in Persian oak (<em>Quercus brantii </em>Lindl.) forests “Taf catchment in Khoram Abad” was investigated in this study. The physiographic and soil properties, and tree canopy cover were measured by the two 500 m2 sampling plots in each 100 m altitudinal classes. The three randomly located subplots (4m2), was used to investigate the ground herbal layer in each sampling plot. Based on the results there is not any significant correlation between richness, evenness, and diversity indices with altitude and slope, while a negative significant correlation was seen between evenness and diversity indices with tree canopy cover. Contrary to the absence of correlation between evenness and diversity indices with soil properties, there is a positive correlation between the amount of soil clay and silt and negative correlation between soil OC, K, N, and sand with richness indices. The results of PCA analysis showed that the amount of K, P, OC, saturated water content, pH, altitude, and tree canopy cover are the most important environmental factor in the study area. Despite the absence of specific patterns in richness, and diversity indices along the altitude gradient, the findings show that tree canopy cover affects evenness and diversity indices, and the soil properties affect richness indices.</strong><br>
تحلیل مولفههای اصلی, تنوع گیاهی, غنای گونهای, گرادیان ارتفاعی
PCA, Plant diversity, Plant richness, Altitudinal gradient
133
150
http://pec.gonbad.ac.ir/browse.php?a_code=A-10-351-2&slc_lang=fa&sid=1
hamzeh
jafarisarabi
حمزه
جعفری سرابی
jafari.ha@fa.lu.ac.ir
10031947532846008440
10031947532846008440
Yes
.
دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرمآباد
babak
pilehvar
بابک
پیله ور
pilehvar.b@lu.ac.ir
10031947532846008441
10031947532846008441
No
Lorestan University
گروه جنگلداری، دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرمآباد
batool
Shabani Rad
بتول
شعبانی راد
batool.shabanirad@gmail.com
10031947532846008442
10031947532846008442
No
.
دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرمآباد
elham
Mal Asadi
الهام
مال اسدی
e.malasad@gmail.com
10031947532846008443
10031947532846008443
No
.
دانشکده کشاورزی و منابع طبیعی، دانشگاه لرستان، خرمآباد