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ارزیابی پتانسیل احیای پوشش گیاهی در باطلههای معدنی زغالسنگ (مطالعۀ موردی: معادن منطقۀ کارمزد سوادکوه، استان مازندران) | ||
| محیط شناسی | ||
| مقاله 3، دوره 41، شماره 4، اسفند 1394، صفحه 757-770 اصل مقاله (796.82 K) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jes.2016.57130 | ||
| نویسندگان | ||
| ناطق لشگری1؛ جمشید قربانی* 2؛ سید حسن زالی3؛ قربان وهاب زاده4 | ||
| 1کارشناس ارشد مرتعداری، دانشکدۀ منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 2دانشیار گروه مرتعداری، دانشکدۀ منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 3مربی گروه مرتعداری، دانشکدۀ منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| 4استادیار گروه آبخیزداری، دانشکدۀ منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری | ||
| چکیده | ||
| باطلههای زغالسنگ مهم‌ترین چالش محیط‌زیستی در مناطق معدن‌کاری‌شده به شمار می‌روند. حضور گونه‌‌های گیاهی در شروع احیای این مناطق اهمیت بسیاری دارد. در این تحقیق از ترکیب گیاهی، تنوع و غنای گونه‌‌ای و خصوصیات گروه‌‌های کارکردی برای ارزیابی پتانسیل احیای طبیعی باطلههای زغالسنگ استفاده شد. مطالعه در باطلههای زغالسنگ در ذخایر زغالسنگ البرز مرکزی در شهرستان سوادکوه در استان مازندران انجام شد. سه انباشت از باطله که از نظر وسعت و مدت زمان انباشت متفاوت بودند، انتخاب شدند. درصد تاج پوشش گونه‌‌های گیاهی در پلات یک متر مربعی برآورد شد. از 43 گونۀ گیاهی ثبت‌شده، 22 گونه منحصراً در باطلۀ با وسعت و سن بیشتری رویش داشتند. شاخص‌‌های غنا و تنوع گیاهی در باطلۀ جوان‌‌تر به طور معنی‌‌داری کمتر از سایر مناطق بودند و منطقۀ مرتعی اطراف بیشترین تنوع و غنا را دارا بوده است. تنوع و غنای گونه‌‌ای با افزایش سن متروک‌ماندن باطله‌‌ها افزایش یافت. استقرار اولیۀ تعداد زیادی از گونه‌‌های گیاهی روی باطله‌‌ها نشان داد که پتانسیلی از گونه‌‌های بومی در منطقه وجود دارد که می‌‌تواند در احیای باطلههای متروک زغالسنگ استفاده شود. باطلههای زغالسنگ که مدت زمان طولانی‌‌‌تری متروک مانده‌‌اند از پتانسیل بیشتری برای احیا برخوردار بوده‌‌اند. | ||
| کلیدواژه‌ها | ||
| باطلۀ زغالسنگ؛ توالی گیاهی؛ تنوع و غنای گونه‌‌ای؛ گونه‌‌های پیشگام | ||
| عنوان مقاله [English] | ||
| Assessing the vegetation restoration potential on coal mine waste (Case study: Karmozd Savadkoh mines, Mazandaran province) | ||
| نویسندگان [English] | ||
| Nateq Lashgari1؛ Jamshid Ghorbani2؛ Seyed Hassan Zali3؛ Ghorban Vahabzadeh4 | ||
| 1Master student, Department of Range Management, Facultyof Natural Resources, Sari AgriculturalSciences and Natural Resources University, | ||
| 2Associate Professor, Department of Range Management, Faculty of Natural Resources, Sari AgriculturalSciences and Natural Resources University | ||
| 3Instructor, Department of Range Management, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University | ||
| 4Assistant Professor,Department of Watershed Management, Faculty of Natural Resources, Sari Agricultural Sciences and Natural Resources University | ||
| چکیده [English] | ||
| Introduction Mining is traditionally regarded as the world’s oldest and the most important activity after agriculture. Despite being an important economic activity, mining causes substantial damage to the environment worldwide. The environmental impact of mining includes erosion, formation of sinkholes, dust, noise and water pollution, vegetation degradation, loss of local biodiversity, and contamination of soil, groundwater, and surface water by chemicals from mining processes. Mine reclamation is the process of restoring land that has been mined to a natural or economically usable state. Establishment of a vegetation cover is essential to stabilize the bare area and to minimize the pollution problem. Mine restoration can aid in maintaining native wildlife populations while providing other valuable ecosystem services, such as erosion control, carbon sequestration, wood production, water-quality improvement, and watershed protection. Area under mining are often characterized by high bulk density, low pH, low nutrient availability, poor structure, low water holding capacity, and low biomass productivity. Basically, there are two approaches to reclamation or restoration of a disturbed site: (1) allowing spontaneous succession or (2) using technical reclamation with sowing or planting target species, accompanied by restoration or improvement of site conditions. There is also a third approach when spontaneous (natural) succession is reasonably directed with the aim to reach a target community. However, until now most restoration projects have relied on technical measures more than on spontaneous natural processes. Main technical methods include the use of mycorrhiza, remediation, fly ash, hydroseeding, top soil, and compost. The main aim of mine restoration is the permanent establishment of vegetation and soil quality improvement in order to increase the ecosystem function. In the first step it is very important to identify the early successional species which can colonize on coal wastes. Spoil heaps after coal mining are an important component of the landscape in several parts of Alborz mountains, where lignite coal is mined deeply or in open-cast mining. Therefore, we studied the potential of plant establishment on spoil heaps and compared the natural vegetation recovery on these heaps with nearby rangelands. Materials and methods This study was carried out in Karmozd area in Savadkoh county, Mazandaran provice (52º57'38" to 52º58'12" E and 36º05'57" to 36º06'53" N). This area has been one of the most important mining areas in central Alborz mountains. The climate of the area is cold humid (536.5 mm annual rainfall, 10.9 ◦C annual average temperature). Three spoil heaps were selected regarding age and the amount of spoil. Spoil heap 1 was the oldest and biggest one while spoil heap 3 was the youngest. Vegetation was samples in all three heaps and the rangeland nearby. Sampling was done along transects using 138 plots of 1 m2. The cover (%) of each species was estimated in each plot. Data were transformed using ASIN(SQRT(x/100)) and then a combination of analysis of variance and t-test were performed for individual species response. Also, we compared the species diversity and richness indices among these sites. Results and Discussion A total of 43 species from 20 families were identified in study area. Gramineae, Asteraceae and Lamiaceae were the most common plants. About 60% of species were perennials. In spoil heap 1 there were 35 species of which 22 species were unique (Table 1). Greater number of annuals and prennials were found in spoil heap 1. It seems that the seeds of 22 unique species were dispersed from surrounding area to spoil heap 1. The germination and establishment of new arrived seeds in spoil heap 1 is possible as this spoil heap is in the vicinity of river and also it had been longer existed than other heaps. The pioneer species in spoil heap 1 are those reported in other studies worldwide. There were 10 species common between spoil heaps and nearby rangelands. Alyssum linifolium, Artemisia scoparia, Bromus briziformis, Colutea persica, ،Hordeum vulgare and Rumex acetosella were found only in spoil heap 1 and spoil heap 2. Artemisia scoparia was the dominant species in rangeland. In spoil heap 1 the dominant species were Hordeum vulgare،Glaucium fimbrilligerum and Artemisia scoparia. The common species in spoil heap 2 were Glaucium fimbrilligerum, Melica persica and Artemisia scoparia while Kochia prostrata was the main dominant species in spoil heap 3. Greater EC was found in soil heap 3 and this is the main reason for the establishment of K. prostrata. Spoil heap 3 significantly had the least species richness and diversity (Fig. 1). There was no significant differences among spoil heap 1, spoil heap 2 and rangeland regarding species diversity while species richness was significantly greater in rangeland than that in spoil heap 1 and spoil heap 2. The greater values of species richness and diversity indices were expected for rangeland as it has a thin layer of developed soil. The soil heap 3 is the youngest coal waste, so this can be the main reason for having less species richness and diversity indices. The harsh environmental situation made this heap only suitable for K. prostrata establishment. Artemisia scoparia, Bromus briziformis and Stachys laxa significantly showed greater cover values in rangeland than that in spoil heaps. In contrast, greater cover (%) of Melica persica and Hordeum vulgare were found significantly in spoil heaps than that in rangeland. The greatest cover (%) of annuals was found in soil heap 1 and 2 while spoil heap 3 had the least cover (%) of annuals. The maximum and minimum cover (%) of perennials was found in rangeland and spoil heap 3, respectively. Conclusion Native species are recommended for long-term restoration of mine wastes as they have more potential for establishment. The establishment of early successional species is related to their seed dispersal from surrounding area. Thereafter, their potential for producing persistent seed bank is very important. The results of this study showed that there is a potential of early successional species to establish on coal wastes. The amount of natural colonization was different among spoil heaps and we found this was related to spoil heap area and age after abandonment. | ||
| کلیدواژه‌ها [English] | ||
| Coal mine waste, Vegetation succession, Species richness and diversity, Pioneer species | ||
| مراجع | ||
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