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مقایسة دامنة اکولوژیک دو گونة Festuca ovina L. و Poa bulbosa L. با برخی متغیرهای محیطی با استفاده از تابع HOF (مطالعة موردی: مراتع حوضة آبخیز گلندرود) | ||
| نشریه علمی - پژوهشی مرتع و آبخیزداری | ||
| مقاله 5، دوره 68، شماره 2، شهریور 1394، صفحه 269-285 اصل مقاله (1.06 M) | ||
| نوع مقاله: مقاله پژوهشی | ||
| شناسه دیجیتال (DOI): 10.22059/jrwm.2015.54930 | ||
| نویسندگان | ||
| قاسمعلی دیانتی تیلکی* 1؛ علی محمدشریفی2؛ سید جلیل علوی3 | ||
| 1دانشیار گروه مرتع‌داری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس | ||
| 2دانشجوی کارشناسی ارشد مرتع‌داری، دانشکدة منابع طبیعی، دانشگاه تربیت مدرس | ||
| 3استادیار گروه جنگل‌داری، دانشکدة منابع طبیعی دانشگاه تربیت مدرس | ||
| چکیده | ||
| مطالعة حاضر در مراتع حوضة آبخیز گلندرود در استان مازندران انجام شد. هدف اصلی این مطالعه مقایسة دامنة اکولوژیک Festuca ovinaو Poa bulbosa بابرخی متغیرهای محیطی با استفاده از تابع HOF بود. بدین منظور، 150 پلات یک‌متر مربعی در طول گرادیان متغیرهای محیطی در مراتع مستقر شد. نمونه‌برداری به صورت تصادفی- سیستماتیک صورت گرفت. در سطح نمونه‌برداری حضور و عدم حضور گونه‌های F. ovinaو P. bulbosa، ارتفاع، و شیب ثبت شد. نمونه‌های خاک از عمق 0 ـ 20 سانتیمتری در هر پلات برداشت شد. برای مطالعة منحنی پاسخ و آپتیمم اکولوژیکی مرتبط با متغیرهای محیطی از تابع HOF با پراکنش دوجمله‌ای استفاده شد. داده‌ها با نرم‌افزارR ver.3.0.2 آنالیز شد. دو گونة F. ovinaو P. bulbosaعمدتاً در طول گرادیان متغیرهای محیطی دامنة اکولوژیک متفاوتی نشان دادند. بر اساس نتایج، دامنة اکولوژیک و بهینة اکولوژیکی برای F. ovinaبه‌ترتیب 2244 ـ 3037 و 3037 متر و برای P. bulbosaبه‌ترتیب 2335 ـ3037 و 2636 متر ثبت شد. همچنین، منحنی پاسخ P. bulbosa نسبت به ارتفاع تک‌نمایی و متقارن بود، اما برایF. ovina به صورت هم‌نوا افزایشی بود. منحنی پاسخ P. bulbosaنسبت بهpH به صورت هم‌نوا کاهشی، اما برای F. ovina به صورت تک‌نمایی متقارن بود. | ||
| کلیدواژه‌ها | ||
| بهینة اکولوژیکی؛ تابع HOF؛ دامنة اکولوژیکی؛ منحنی پاسخ؛ Festuca ovina؛ Poa bulbosa | ||
| عنوان مقاله [English] | ||
| Comparison of the ecological amplitude of Festuca ovina L., and Poa bulbosa L.,to some environmental variables using the function HOF (Case study: Rangeland of Glandrood Watershed) | ||
| نویسندگان [English] | ||
| Ghasem Ali Dianati Tilaki1؛ Ali Mohammadsharifi2؛ Seyed Jalil Alavi3 | ||
| 1Associate Professor, Department of Rangeland Management, Faculty of Natural Resources, Tarbiat Modares University | ||
| 22M.Sc. Student, Department of Rangeland Management, Faculty of Natural Resources, Tarbiat Modares University | ||
| 3Assistant Professor, Department of Forestry, Faculty of Natural Resources, Tarbiat Modares University | ||
| چکیده [English] | ||
| The present study was conducted in the rangeland of Glandrood watershed in the province of Mazandaran. The objective of this study was to compare between the ecological amplitude of Festuca ovina L., and Poa bulbosa L., using the function HOF along the gradient of the environmental variables. For this purpose 150 plots of 1m2 were established along the altitude gradient. The sampling method was randomized-systematic. In the area sampled, frequency of Festuca ovina and Poa bulbosa, altitude and slope were recorded. Soil samples were taken from 0-20 cm in each plot. In each sample, bulk density, pH, N, EC, organic matter, organic carbon, the percentage of sand, silt and clay were measured. In order to study the shape of response curve and the ecological optimum in relation to the mentioned variables, HOF function was used with binomial distribution function. The data were analyzed by R ver.3.0.2 software. The two species Festuca ovina and Poa bulbosa, mainly showed different ecological amplitude along the gradient environmental variables. The results showed that the ecological amplitude and optimum alonge altitude gradient for Festuca ovina has been recorded 2244-3037m and 3037m respectively for Poa bulbosa 2335-3037m and 2636 m respectively. Also the response curve of Poa bulbosato the altitude has unimodal and symmetric but for Festuca ovina was monotonically increasing trend. The response curve ofPoa bulbosato pH is monotonically decreasing but for Festuca ovina was unimodals symmetric. | ||
| کلیدواژه‌ها [English] | ||
| HOF function, ecological amplitude, Ecological optimum, response curve, Festuca ovina and Poa bulbosa | ||
| مراجع | ||
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