نشریه محیط زیست طبیعی

اثرات زیست محیطی خروج چوب از منظر ترکیب و تنوع زیستی زادآوری (مطالعه موردی: سری گردشی جنگل چوب و کاغذ مازندران)

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشگاه علوم کشاورزی و منابع طبیعی ساری

2 دانشگاه تهران

چکیده

استفاده از اسکیدرهای چرخ لاستیکی، عملیاتی معمول برای خروج چوب از عرصه قطع است، هر چند گاهاً سبب بعضی مشکلات زیست محیطی می‌شود. هدف از این تحقیق بررسی تاثیر چوبکشی بر تنوع زیستی زادآوری درختی و پوشش علفی در اطراف مسیر چوبکشی بوده است. این پژوهش در پارسل 8 سری گردشی از جنگل‌های چوب و کاغذ مازندران به انجام رسید. دو پلات‌ 400 متر مربعی در فواصل منظم در هر طرف مسیر چوبکشی در نظر گرفته شد که در این پلات‌ها 9 میکروپلات 2×2 متر برای اندازه‌گیری تعداد زادآوری درختی و درصد پوشش علفی اندازه‌گیری شد. شاخص‌های تنوع‌ زیستی (Shannon-wiener, Simpson)، شاخص‌های غنا (Menhinick, Margalef) و شاخص یکنواختی (Equitability or Evenness) با استفاده از نرم افزار PAST محاسبه گردید. آنالیز داده‎ها به کمک نرم افزار SPSS به انجام رسید. نتایج این تحقیق نشان داد که مقادیر اسیدیته، هدایت الکتریکی، ازت، پتاسیم، کلسیم و کربن خاک در فواصل مختلف از مسیر چوبکشی اختلاف معنی‌داری ندارند و همچنین میانگین شاخص‎های تنوع، غنا و یکنواختی در فواصل مختلف از مسیر چوبکشی اختلاف معنی‎داری ندارد و بنابراین تنوع زیستی زادآوری درختی و پوشش علفی در اثر چوبکشی تغییری نکرده است.

کلیدواژه‌ها

عنوان مقاله [English]

Environmental effects of wood extraction on composition and biodiversity regeneration (tree and herbaceous cover) (A case study: Gardeshy district of Choob and Kaghaz Mazandaran)

چکیده [English]

The use of wheeled skidders is well accepted practice for the extraction of timber from the forest, but this has tended to cause the greatest environmental problems. The aim of this study was survey wood extraction effects on tree regeneration and herbaceous cover biodiversity. The research location was Gardeshy district of Wood and Paper Co. in Mazandaran Province. Two plots with 400 m2 area considered at regular intervals on each side of the skid trail from skid trail. In this plots nine 2*2 meter microplot were used for counting of tree regeneration and percentage of herbaceous cover. Biodiversity indices (Shanon, Simpson), richness indices (Menhinick, Margalef) and uniformity indices (Equitability or Evenness) were estimated with PAST software, then analyzed data with SPSS software. The results of this study showed that the pH, electrical conductivity, nitrogen, potassium, calcium and carbon of soil were not statistically different at different distances from the skid trail and also biodiversity, richness and uniformity indices for herbaceous species and woody species regeneration don’t have significantly difference in different distance from skid trail.

کلیدواژه‌ها [English]

  • wood extraction
  • tree regeneration
  • herbaceous cover
  • biodiversity
Asase, A., Asiatokor, B.K. and Ofori-Frimpong, K. 2014. Effects of selective logging on tree diversity and some soil characteristics in a tropical forest in southwest Ghana, Journal of Forestry Research, 25(1): 171–176.
Avon, C., Dumas, Y. and Berges, L. 2013. Management practices increase the impact of roads on plant communities in forests. Biological Conservation, 159:24-31.
Binkley, D. and Giardina, C. 1998. Why do tree species affect soils? The warp and woof of tree-soil interactions. Biogeochemistry, 42: 89-106.
Cambi, M., Certini, G., Neri, F. and Marchi, E. 2014. The impact of heavy traffic on forest soils: A review. Forest ecology and management, 338: 124-138.
Crowley, W., Harrison, S.S., Coroi M. and Sacre V.M., 2003. An ecological assessment of the plant communities at Port Ban nature reserve in south-western Ireland. Biology and Environmental: Proceeding of Royal Irish Academy, 1038 (2): 69 - 82.
Delgado, J.D., Natalia, L.A., Arevola, J.R. and Fernandez-Palacios. M.J. 2007. Edge effect of roads on temperature, light, canopy cover and canopy height in laurel and pine forests (Tenerife, Canary Islands). Landscape and Urban Planning, 81:328-340 pp.
Demir, M., Makineci, E. and Yilmaz, E. 2007. Investigation of timber harvesting impacts on herbaceous cover, forest floor and surface soil properties on skid road in an oak (Quercus petrea L.) stand. Building and Environment, 42: 1194-1199.
Dykstra, D.A. and Heinrich, R. 1992. Sustaining tropical forest through environmentally sound timber harvesting practices. Unasylva, 139: 237-255.
Han, H.S. and Kellogg, L.D. 2003. Damage Characteristics in young Douglas-fir Stands from commercial thinning with four timber harvesting systems. Dep. For. Eng. College of forestry, Oregon state university, 8 p.
Heninger, R., Scott, W., Dobkowski, A., Miller, R., Anderson, H. and Duke, S. 2002. Soil disturbance and 10-year growth response of coast Douglas-fir on nontilled skid trails in the Oregon Cascades. Canadian Journal of Forest Research, 32: 233-246.
Hosseini, S.A.O., Nasiri, M. and Akbarimehr. M. 2014. Skidders traffic assessment on forest soil properties. International Journal of Civil Engineering. 13(3): 372-377.
Jamshidi alashti, R., 2005. Effects of ground-based skidding on soil physical properties of skid trails and forest productivity. M.Sc thesis of forestry, Tarbiat Modares University of marine Sciences and Natural Resources. 75 p. (In Persian)
Kneeshaw, D.D., Leduc, A., Drapeau, P., Doucet, R., Bouthillier, L. and Messier, C. 2000. Development of integral ecological standards of sustainable forest management at an operational scale. Journal of Forestry Chronicle 76: 481-493.
Kooch, Y., Jalilvand, H., Bahmaniar, M.A. and Poormajidian, M.R. 2008. Determination of forest types on basis of Importance Value Index (IVI) in aspects of lowland forests in Chalous Khanikan, Environmental Journal, 46: 33-38.
Litschert, S.E. and MacDonald, L.H. 2009. Frequency and characteristics of sediment delivery pathways from forest harvest units to streams. Forest Ecology and Management, 259: 143-150.
Lotfalian, M., 1996. Research study on the effects of timber skidding by Taf skidder on soil compaction. M.Sc thesis of forestry, Tarbiat Modares University of marine Sciences and Natural resources, 114 p. (In Persian)
Mosadegh, A. 1996. Reclamation of aridlands. Tehran University Press, 226p. (In Persian)
Nekooimehr, M., Rafatnia, N., Raisian, R., Jahanbazi, H., Talebi, M. and Abdolahi, Kh. 2006. Impact of road construction on forest destruction in Bazoft region. Forest and Poplar Journal, 14: 228-243. (In Persian)
Pathak, P.K.L., Sahrawat, T.J. and Wani, S.P. 2004. Measurable Biophysical Indicators for Impact Assessment: Changes in Soil Quality. In: Shiferaw, B., H. A. Freeman and S. M. Swinton (Eds), Natural resource and management in agriculture. Methods for assessing economic and environmental impacts. ICRISAT, Patancheru, India.
Potočnik, I., Pentek, T., Pičman, D., Papa, I. and Poje, A. 2008. Filling in the clearance of a forest road cross section in Beech forest. Croatian Journal of Forest Engineering, 29: 53-62.
Reed Noss. 1995. The ecological effects of roads. Wildland CPR. Tuffel, K.V., S. Hein, M. Kotar, E.P. Preuhsler, J. Puumalainen, and P. Weinfurter. 2006. Sustainable Forest Management. Springer press, Germany.
Rivett, S.L., Bicknell, J.E. and Davies, Z.G. 2016. Effect of reduced-impact logging on seedling recruitment in a neotropical forest, Forest Ecology and Management, 367(1): 71-79.
Riyahifard, N. 2010. Impact of forest road on soil characteristics diversity of ground vegetation and tree regeneration on road sides, a case study in 5 district section 2 (Neka-Zalemrood). M.Sc. thesis of forestry, Sari University of Agriculture Sciences and Natural Resources, 100 p. (In Persian)
Salarodini, A.A. 2006. Soil fertility, University Press, Tehran, 434p. (In Persian)
Sist, P. Reduced impact logging in the tropics: objectives, principles and impacts. Intl. For. Rev. 2: 3-10. 2000.
Varavipour, M. 2012. Basic Soil, Payamnour Press, 366p. (In Persian)
Zadsar, Z. 2010. Effect of road age and distance from forest roads on diversity of trees and shrubs. M.Sc. thesis, Gorgan University of Agriculture Sciences and Natural Resources, Faculty of forestry and wood technology, 75 p. (In Persian)
نشریه محیط زیست طبیعی
دوره 71، شماره 1
خرداد 1397
صفحه 93-107