somaye arazi; mohammadhosein irannezhadparizi; Ahad sotoudeh; bahman kiani
Abstract
Background: Landscape of an area consists of uniform parts of that land that have components of patchs, passages and bed of land landscape. Since the density and distribution of vegetation in the landscape of the land of the passage of time is affected by many variables and changes. Variety and uniformity ...
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Background: Landscape of an area consists of uniform parts of that land that have components of patchs, passages and bed of land landscape. Since the density and distribution of vegetation in the landscape of the land of the passage of time is affected by many variables and changes. Variety and uniformity of plants studies the effectiveness of the indicators of richness, diversity and uniformity of vegetation from the structure of the landscape.Materials and Methods: In this study, two variables of size and shape of patchs on the structure of the Adoroshk watershed were selected because these two variables are known as important components in the planning of areas for conservation purposes. For this purpose, first the identification and preparation of the map of the structure of the land address of Adoroshk was performed and then the desired map in Arc GIS 10.3 software with suitable image format and ready to enter FRAGSTATS 4.2 software and then two variables of ratio of environment to area and size The patchs in the structure of Adoroshk land were calculated. Data obtained from identification and counting of vegetation in the area, which were the result of linear transect and plot method, were also entered in SPSS software environment and through Shannon-Wiener, Simpson, Hill, Brillouin and MacArthur Plant diversity was measured using the Margalf, Mann-Henick index of plant richness in each spot of the habitat. The Pilo, Alatalo and Hip indices were also used to measure species uniformity. The correlation between the variables was determined from Pearson correlation.Results and Discussion: In this study, 60 plant species were identified and counted in 338 plots and the findings of this study indicate a significant relationship between the two physical variables of size and shape of habitat spots and richness. The diversity and uniformity of rangeland plant species in the Adoroshk watershed.Conclusion: The priority of paying attention to circular patchs that have a minimum ratio of environment to area in the design and management of Adoroshk watershed was proven during the planning and protection of vegetation.
Naser Baghestani Maybodi; Mohammad Taghi Zare
Volume 6, Issue 3 , April 2009
Abstract
Plants are one of the most important factors of rangeland ecosystems that have in close relation with other ecosystem factors. For the protection, restoration and stable development of these ecosystems it is necessary to recognize present relationships more and more. So, in this research some characteristics ...
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Plants are one of the most important factors of rangeland ecosystems that have in close relation with other ecosystem factors. For the protection, restoration and stable development of these ecosystems it is necessary to recognize present relationships more and more. So, in this research some characteristics of Seidlitzia rosmarinus were studied. First, Seidlitzia rosmarinus plant types were identified in a cover map area of Yazd Province and the results of other research about this species were reviewed and collated. Results show that Seidlitzia rosmarinus is dominant in about 600000 hectares of lands located in the margin of Yazd playa. There are 10 plant types with Seidlitzia rosmarinus predominating and, out of 9 plant types, it is second or third species. The mentioned plant types are located at altitudes between 900- 1750 meters and where the average annual rainfall is lower than 100 mm. High water tables and salinity are two characteristics of this land. The flowering stage starts in early autumn and seeds ripen at the end autumn. High seed production and germination rate are useful characteristics for reproduction. This plant was consumed well by camels, so that not only in range grazing but also in hand feeding it has a suitable preference value. In order to control wilting of Seidlitzia rosmarinus, camel grazing was recommended. Furthermore, its forage can be harvest every other year and mixed with other forage for camel feeding. Sodium carbonate salt was extracted by biomass burning.
