| تعداد نشریات | 286 |
| تعداد نشریات سازمان | 84 |
| تعداد شماره‌ها | 2,998 |
| تعداد مقالات | 33,579 |
| تعداد مشاهده مقاله | 44,251,112 |
| تعداد دریافت فایل اصل مقاله | 20,622,063 |
ارزیابی شاخصهای تنوع زیستی طی چهار سال در منطقه بگعان استان خوزستان | ||
| تحقیقات مرتع و بیابان ایران | ||
| مقاله 16، دوره 28، شماره 3، مهر 1400، صفحه 593-604 اصل مقاله (598.95 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22092/ijrdr.2021.125023 | ||
| نویسندگان | ||
| مهری دیناروند* 1؛ کوروش بهنام فر1؛ عبدالحسین آرامی2؛ سجاد عالی محمودی سراب2؛ کهزاد حیدری2 | ||
| 1استادیار پژوهشی، بخش تحقیقات جنگلها و مراتع، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان خوزستان، سازمان تحقیقات، آموزش و ترویج کشاورزی، اهواز، ایران | ||
| 2پژوهشگر و ناظر مؤسسه تحقیقات جنگلها و مراتع کشور، سازمان تحقیقات، آموزش و ترویج کشاورزی، تهران، ایران | ||
| چکیده | ||
| مطالعه پوشش گیاهی و اندازهگیری شاخصهای تنوع ابزار مناسبی برای مطالعه وضعیت پوشش جنگلها و مراتع و ارزیابی آنهاست. این پژوهش با هدف ارزیابی روند تغییرات پوشش گیاهی طی چهار سال متوالی در دو فصل در منطقه بگعان انجام شد. بدین‌منظور تعداد 5 ترانسکت 100 متری با فواصل 50 متری در منطقه مورد مطالعه به‌صورت تصادفی سیستماتیک در نظر گرفته شد. در امتداد ترانسکتها جمعاً 30 پلات یک مترمربعی ثابت نصب گردید. در دو فصل رویشی بهار و پاییز طی سالهای 1396 تا 1399 نوع و درصد پوشش گونههای بومی برداشت شد. با استفاده از نرمافزارPAST و R شاخصهای غالبیت، یکنواختی و تنوع گونهای سیمپسون، شانون و هیل اندازهگیری شد. نتایج تجزیه واریانس یک‌طرفه در بهار سالهای 1396 تا 1399 نشان داد که میان میانگین شاخصهای درصد پوشش، غالبیت و شاخصهای تنوع سیمپسون و شانون در سالهای متوالی برداشت اختلاف معنی‌داری وجود دارد. در پاییز به غیر از شاخص غالبیت در سایر شاخصها طی پاییز سال 1398 نسبت به سال 1397، اختلاف معنی‌داری وجود داشت. از نتایج ذکرشده نتیجهگیری میشود، با وجود برگشت تعدادی گونه یکساله یا کوتاه‌زی مانند Bienertia cycloptera Bunge وSalsola jordanicola Eig. در پی آبیاری نهالهای کشت شده و بارندگی، منطقه مورد مطالعه همچنان حساس و شکننده بوده و تا احیای مناسب نیاز به مدیریت و قرق دارد. | ||
| کلیدواژه‌ها | ||
| آتریپلکس؛ شاخص تنوع سیمپسون؛ شاخص تنوع شانون؛ نهال‌کاری؛ درصد پوشش گیاهی | ||
| عنوان مقاله [English] | ||
| Evaluation of biodiversity indices during four years in Bagan region of Khuzestan province | ||
| نویسندگان [English] | ||
| Mehri Dinarvand1؛ Kourosh Behnamfar1؛ Abdolhosein Arami2؛ Sajad Alimahmoudi Sarab2؛ Kahzad Heidari2 | ||
| 1Assistant Professor, Forests and Rangelands Research Department, Khuzestan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Ahvaz, Iran | ||
| 2Researcher in Forests and Rangelands Research Department, Khuzestan Agricultural and Natural Resources Research and Education Center, Agricultural Research Education and Extension Organization (AREEO), Ahvaz, Iran | ||
| چکیده [English] | ||
| The study of vegetation and the measurement of diversity indices are suitable tools for studying the status of forests and rangelands and evaluating them. The purpose of this study is to evaluate the trend of vegetation changes during four consecutive years and in two seasons in the Bagan region. For this purpose, 5 transects of 100 meters with distances of 50 meters in the study area were considered systematically randomly. A total of 30 plots of one fixed square meter were installed along the transects. In two growing seasons, spring and fall, from 2017 to 2020, the type and percentage of cover of native species were harvested. Dominance, uniformity and diversity of Simpson, Shannon and Hill species were measured using PAST and R software. The results of one-way analysis of variance (ANOVA) showed that there is a significant difference between the mean of dominance, Shannon and Simpson indices, percentage of cover, and the number of species in the spring of different harvest years. In fall, except for the dominance index in other indices during July 2019 compared to 2018, there was a significant difference. From the results, it can be concluded that despite the return of some annual or short-lived species such as Bienertia cycloptera Bunge and Salsola jordanicola Eig. following irrigation of cultivated seedlings and rainfall, the study area is still sensitive and fragile and needs to be managed and confined until proper rehabilitation. | ||
| کلیدواژه‌ها [English] | ||
| Atriplex, Simpson diversity index, Shannon diversity index, seedling, vegetation percentage | ||
| مراجع | ||
|
Assadi, M., Maassoumi, A., Khatamsaz, M. and Mozaffarian, V., 1988-2018. Flora of Iran, Volumes 1-147. Research Institute of Forests and Rangelands Publications, Tehran. Atashgahi, Z., Ejtehadi, H., Mesdaghi, M. and Ghassemzadeh, F., 2018. The existence of a unimodal or monotonic pattern in species richness and diversity along an elevation gradient: a case study in Heydari Wildlife Refuge, NE Iran. Journal of Nova Biologica Reperta, 5(3): 291-298. Azarnivand, H. and Zare Chahouki, M.A., 2011. Rangeland Ecology. University of Tehran, Tehran, 364pp. Bagherian, R., Sefidi, K., Keivan Behjou, A., Soltani, A. and Behtari, B., 2020. Comparison of plant species diversity and evenness in different grazing levels southeastern slopes of Sabalan. Journal of environmental, science and technology, 22(2): 373-38. Chamani, A., Tavan, M. and Hoseini, S.A., 2011. Effect of three operation systems of contour furrow, pitting and enclousure on rangeland improvement (Case study: Golestan province, Iran). Journal of rangeland science, 2(1): 379-387. Dinarvand, M., Ejtehadi, H., Farzam, M. and Andarzian, S.B., 2016. A survey on the impacts of environmental factors on biodiversity, and modeling the effects of climate change on certain species distribution in Shimbar protected area, Khuzestan Province, SW Iran. PhD thesis, Ferdowsi University of Mashhad, Mashhad. 166pp. Dinarvand, M., Fayaz, M., Behnamfar, K., Khaksarian, F., Yasreby, B. and Arami, S.A., 2021. An assessment of species diversity and vegetation richness indices in two dust centers of Khuzestan province. The Iranian Journal of Biology, 9(4): 73-87. Dinarvand, M., Keneshloo, H. and Fayaz, M., 2018. Vegetation of dusty place in Khuzestan province. Iran Nature, 3(3): 32-42. Dinarvand, M. and Jamzad, Z., 2020. Plant diversity of Khuzestan and dust sources in the southwest of Iran, with a checklist of vascular plants. Journal of Phytotaxa, 434(3): 219-254. Ejtehadi, H., Sepehry, A. and Akafi, H.R., 2008. Methods of measuring biodiversity. Ferdowsi university of Mashhad, Publication No 530, 228 pp. Hassanzadeh, M., Akbarzadeh, M. and Mohamadi, R., 2010. Assessment seasonal change of production and uses of rangelands species in Masjed Solyman-Khuzestan. Final report. Research institute of forests and rangelands. Hill, M.O., 1973. Diversity and evenness: A unifying notation and its consequences. Journal of Ecology 54: 427-432. Jahantigh, M. and Pessarakli, M., 2009. Utilization of contour furrow and pitting techniques on desert rangelands: Evaluation of runoff, sediment, soil water content and vegetation cover. Journal of Food, Agriculture and Environment, 7 (2): 736-739. Kawada, K., Suzuki, K., Suganuma, H., Smaoui, A. and Isoda, H., 2012. Plant biodiversity in the semi-arid zone of Tunisia. Journal of Arid Land Studies, 22 (1): 83-86. Khosravi Moshizi, A. and Shrafatmandrad, M., 2021. Investigating the relationship between plant diversity and annual production in semi-arid rangelands of National Park Khabr, Kerman province. Iranian journal of Range and Desert Research, 28(2): 250-259. Legendre, P. and Legendre, L., 2012. Numerical ecology, 3rd English edition. Developments in Environmental Modelling vol. 24. Elsevier Science BV, Amsterdam. 1006 pp. ISBN-13: 978-0444538680. Mc Cann, K. S., 2000. The diversity-stability debate. Journal of Nature, 405: 228-233. Mesdaghi, M., 2005. Plant Ecology. Publication of Jahade Daneshgahi, 187p. Mozaffarian, V., 1999. Flora of Khuzestan. Research center of natural resources and husbandry of Khuzestan, Ahvaz, 144pp. Rahimizadeh, A., Farzadmehr, J., Rostagi, A. A. and Ramezani Gask, M., 2010. Comparison of effects of planting Haloxylon spp. And Atriplex spp. On the characteristics of vegetation cover and ranglands soil (A case study: Salemabad, Sarbishe, Iran). Journal of Renewable Natural Resources Research, 1(2): 1-13. Rechinger, K. H. (ed.)., 1963-2015. Flora Iranica, vols. 1-181, Wien. Townsend, C.C. and Guest, E., 1974-1985. Flora of Iraq, vols. 3, 4, 8, Baghdad. Yirdaw, E. and Lukanen, S., 2003. Indigenous woody species diversity in Eucalyptus globules labill ssp. Globules plantation in the Ethiopian highlands. Journal of Biodiversity and conservation, 12: 567-582. Zare, M.T., Fayaz, M., Zarekia, N., Baghestani Mybodi, N. and Abolghasemi, M., 2020. Effect of different methods of rainfall storage and cultivation season in the establishment of Ferula tabasensis species in Yazd province (Case study: Kalmand Bahadoran rangeland). Iranian Journal of Range and Desert Research, 27(1): 24-35. Zehtabian, G. R., Bakhshi, J., Ghadimi, M. and Biroudian, N., 2009. Investigation on Understory vegetative cover in Haloxylon aphyllum plantation area in Ardestan region, Iran. Iranian Journal of Range and Desert Research, 15(4): 436-446. Zohary, M., 1966-1986. Flora Palaestina vols. 1-4, Israel Academy of Science and Humanities, Jerusalem. | ||
|
آمار تعداد مشاهده مقاله: 485 تعداد دریافت فایل اصل مقاله: 382 |
||