Document Type : Research Paper

Authors

1 Rangeland Management Department, Faculty of Natural Resources, Tarbiat Modares University, Noor, Iran

2 Nature Engineering Department, Faculty of Natural Resources Sciences, Malayer University, Malayer, Iran

3 Department of Biological Sciences, College of Natural Sciences and Mathematics, University of Denver, USA.

10.22059/jrwm.2024.364407.1725

Abstract

The paper is conducted to investigate the coverage and the seed bank in the areas the Riparian of the Gyan river in Nahavand city in Hamadan province. Five sampling sites along the river were determined. At each site, a transect perpendicular to the river flow and along each transect at least 6 plots of 1 square meter (three on each side of the river) are established. The Soil sampling was done from two depths of 0-5 and 5-10 cm at 10 points randomly from each plot. The soil samples are cultivated in the greenhouse the seeds germinate in them and are identified. Then diversity indices, calculated for cover and soil seed bank in each plot. Each of the above factors are compared in the intervals of 0-10, 10-20 and 20-30 meters from the center of the river by one-way ANOVA. Also, Sorenson's index is used to check the similarity of the species composition of cover and the soil seed bank of the Riparian area. The results show that the highest diversity related to the soil seed bank is at a depth of 0-5 cm at a distance of 10-20 meters, which is due to the dominant of Cyperus difformis annual plants at this depth. The percentage of similarity of surface-ground cover in the areas of Riparian and seed bank of the first depth and the second depth (20-7) percent, which was very low due to the washing of seeds by the river currents and the movement of seeds by grazing. This study showed that recovery of the vegetation of the river riparian is possible via the soil seed bank.

Keywords

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