طبقه‌بندی جوامع گیاهی شمشاد هیرکانی (Buxus hyrcana Pojark.) در جنگل چشمه‌بلبل (بندر‌گز گلستان)

نوع مقاله : علمی - پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد جنگلداری، گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران

2 استادیار، گروه علوم و مهندسی جنگل، دانشکده منابع طبیعی، دانشگاه تربیت مدرس، نور، ایران

چکیده

این پژوهش با هدف طبقه­بندی جوامع گیاهی جنگل­های شمشاد چشمه­بلبل بندرگز گلستان انجام شد. برای این منظور داده­های مربوط به پوشش گیاهی از سطح 97 رلوه به­صورت سیستماتیک –انتخابی با ابعاد شبکه شناور 200 متری به مساحت 400 مترمربعی با استفاده از روش براون-بلانکه و با تأکید بر اصل توده معرف برداشت شد. در هر یک از رلوه­ها فهرست همه گونه­های گیاهی به همراه درصد تاج­پوشش آن­ها بر اساس مقیاس وان­درمارل ثبت شدند. طبقه­بندی جوامع گیاهی با استفاده از نتایج تلفیقی دو روش TWINSPAN اصلاح‌شده و روش سنتز جدولی براون-بلانکه انجام شد. تعیین گونه­های تشخیصی نیز با استفاده از شاخص کیفی تعلقه فی تعدیل­شده انجام شد. نتایج نشان داد در سطح منطقه تعداد 5 اجتماع گیاهی در قالب دو جامعه همیشک-شمشادستان (Danae racemocii- Buxetum hyrcanae) و انجیلی-شمشادستان (Parrotia persicae- Buxetum hyrcanae)، سه زیرجامعه بلندمازو (Parrotio – Buxetum quercoetosum castaneifoliae)، شیردار (Parrotio-Buxetum aceretosum cappodocicum) و آزاد (Dannae- Buxetum subasso Zelkovoetosum carpinifoliae) و دو واریانت ال (Cornus australis) و انجیر (Ficus carica) است. نتایج این پژوهش ضمن معرفی سین­تاکسون­های شمشاد در ناحیه شرقی هیرکانی، اجتماع­پذیری بالای گونه شمشاد در تشکیل جوامع گیاهی متمایز با گونه­های چوبی اشکوب بالا به­دلیل عدم حضور گونه­های علفی زیراشکوب را نیز دلالت می­کند.

کلیدواژه‌ها

عنوان مقاله [English]

Classification of box tree plant communities (Buxus hyrcana Pojark.) In the Cheshmeh bolbol forest (Bandar Gaz Golestan)

نویسندگان [English]

  • ّFarhad Khabbazi 1
  • Omid Esmailzadeh 2
1 .Sc. Student of Forestry, Department of Forest Science, Faculty of Natural Resources, University of Tarbiat Modares, Nur, Iran
2 2Assistant Prof., Department of Forest Science, Faculty of Natural Resources, University of Tarbiat Modares, Nur, Iran
چکیده [English]

This study was conducted with the aim of classifying the Box tree forests of the plant communities in Bandar Gaz Golestan. For this purpose, Vegetation releves, 97 numbers, were made at peak vegetation cover by systematic-selective method in 200 meter grid dimensions with an area of 400 square meters by using Braun-Blanquet and consideration indicator stands concept. In each releves, all vascular plant species were recorded, and their percentage cover was visually assessed using a modification of the ordinal van der Maarel cover-abundance scale. The classification of plant communities was done using the combined results of two modified TWINSPAN methods and a Braun-Blanquet table synthesis method. Determination of diagnostic types was also done using the qualitative index of correlation coefficient. The results showed that in the area of the region, there are five plant communities in the form of two communities: Danae racemocii Buxetum hyrcanae and Parrotia persicae-Buxetum hyrcany and five subspecies of Quercos castaneifolia, Acer cappadocicum, Cornus australis, Ficus carica and Zelkova carpinifolia. The results of this study, while introducing Box tree Syntaxons in the eastern part of Hyrcany, indicate the high sociality of the Box tree species in the formation of distinct herbaceous communities with high denominability of the forests due to the absence of herbaceous species in the foraminous.

کلیدواژه‌ها [English]

  • Modified TWINSPAN
  • Braun-blanquet table synthesis
  • Ordination
  • Diagnostig species

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پژوهش و توسعه جنگل
دوره 6، شماره 3
آذر 1399
صفحه 491-503

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