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بررسی زادآوری و ترکیب پوشش گیاهی در حاشیه جاده‌های جنگلی | ||
| نشریه جنگل و فرآورده های چوب | ||
| مقاله 8، دوره 69، شماره 1، خرداد 1395، صفحه 87-96 اصل مقاله (847.14 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jfwp.2016.57769 | ||
| نویسندگان | ||
| حسن پوربابایی* 1؛ رامین نقدی1؛ مهدی حیدری2؛ مهدیه نوری1 | ||
| 1دانشگاه گیلان | ||
| 2دانشگاه ایلام | ||
| چکیده | ||
| به‌منظور ارزیابی اثرات جاده‌ی جنگلی بر زادآوری و ترکیب پوشش گیاهی در سری دو حوزه‌ی شفارود، جاده‌ای به طول 400 متر که به لحاظ ارتفاع، جهت دامنه، تغییرات شیب و ترکیب گونه‌ای دارای وضعیت یکنواختی بود، انتخاب شد. نمونه‌برداری بر روی ترانسکت (خط) انجام شد. تعداد 5 ترانسکت در سمت راست و 5 ترانسکت در سمت چپ جاده، عمود بر آن پیاده شدند. در هر ترانسکت فواصل 5، 15, 25 و 35 متر مشخص شدند. در هر فاصله نوع و زادآوری گونه‌های درختی و درختچه‌ای در قطعات نمونه‌ی 100 مترمربعی و نوع و درصد پوشش گونه‌های علفی با استفاده از روش حداقل سطح در قطعات نمونه‌ی 64 مترمربعی ثبت شدند. با استفاده از آنالیز دو طرفه گونه‌های شاخص، پوشش علفی محدوده‌ی مورد مطالعه به صورت دو گروه Primula heterochroma و Lolium temulentum L. - Rumex conglomeratus طبقه‌بندی شدند. طبق نتایج، ترکیب گونه‌ای قطعات نمونه‌ی نزدیک جاده با قطعات نمونه‌ی داخل جنگل متفاوت بوده و در دو دسته‌ی مجزا گروه‌بندی شدند. از بین زادآوریهای ثبت شده، فراوانی توسکای ییلاقی اختلاف معنی‌داری را بین لبه جاده و داخل جنگل، با فراوانی بالاتر در لبه جاده نشان داد. نتایج تحقیق حاضر، در ارزیابی اثرات بوم‌شناسی جاده‌ها در شرایط رویشگاهی مشابه مفید خواهد بود. | ||
| کلیدواژه‌ها | ||
| پوشش گیاهی؛ زادآوری؛ جاده‌های جنگلی؛ تحلیل دو طرفه؛ شاخص جاکارد | ||
| عنوان مقاله [English] | ||
| Investigation on the Regeneration and Vegetation Composition in the Edge of Forest Roads | ||
| چکیده [English] | ||
| In order to evaluate the effects of forest road on regeneration and vegetation composition in district No. 2 Shafaroud, a road was selected with the length of 400 m that the altitude, aspect, slope variations and species composition were similar. Five transects in right and 5 transects in left side of road, were established as perpendicular. In each transect 5, 15, 25 and 35 m distances were determined from the road edge. Type and number of regeneration species of trees and shrubs in 100 m2, and type and cover percentage of herbaceous species with using minimal area method were recorded in 64 m2. Herbaceous species was classified into two groups using Two-Way Indicator Species Analysis: Primula heterochroma and Lolium temulentum L. - Rumex conglomerates. Results indicated that species composition of plots in road edge was difference in comparing with plots of inside the forest and they were classified into two separate groups. Among the regenerations Alnus subcordata had significant difference in term of abundance between different distances from the edge of the road. This species had more abundance in the edge of the road. The results of the present study would be useful for evaluating ecological effects of roads on sites with similar conditions. | ||
| کلیدواژه‌ها [English] | ||
| Forest road, Jaccard’s index, Regeneration, two way analysis, vegetation | ||
| مراجع | ||
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