Analysis of Spatial Pattern of Been trefoil (Anagyris foetida L.) with Different sampling methods (Case Study: Kaseh-karan,GilanGharb)
Subject Areas : forest
mahboobeh gholami
1
(Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran)
rezahossein hheidary
2
(Campus of Agriculture and Natural Resources, Razi University, Kermanshah, Iran.)
Mohammad Maasoumi
3
(Faculty of Science, Razi University, Kermanshah, Iran)
Keywords: Plot, Ecosystem, Distance method,
Abstract :
The spatial pattern is one of the key characteristics of forest ecosystems, which controls the composition and structure, performance and self-regulation of the forest. The spatial pattern of the stands is measured by measuring and determining the position of trees in the stand and by introducing them into analytical frameworks. The aim of this study was to compare the indices of quadrat and distance indicators in order to determine the spatial distribution pattern of Anagyris foetida L. in Gilan-Gharb forests. For this purpose, 55 samples were carried out based on a systematic randomized pattern with a 100 * 100 meter network. Circular sampling plots with 10 ar area and distance sampling method for collecting data were used. In order to analyze the spatial pattern of trees, the indices of plot sampling and distance sampling indices were used. Indices in plot sampling; including the ratio of variance to mean, Morrisita index, standard of Morrisita index, Green index, clustering and C index and in distance sampling indices; including the Johnson and Zimmer, Eberhardt, Hinez, Hopkins were used. The results showed that all indices of this study other than C index (which showed a Random spatial pattern) showed the aggregation spatial pattern of Anagyris foetida in the studied area.
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