Management of Natural Ecosystems

Management of Natural Ecosystems

Investigation ofhabitats properties and response pattern of Vicia persica Boiss to environmental factors in rangelands of Mazandaran province

Document Type : Original Article

Authors
1 Associate Professor, Forest and Rangeland Research Department, Mazandaran Agriculture and Natural Resources Research and Education Center, AREEO, Sari, Iran.
2 Associate Professor, Forest and Rangeland Research Department, Markazi Agriculture and Natural Resources Research and Education Center, AREEO, Arak, Iran.
Abstract
Predictive models of response of plant species to environmental factorsare important tools for obtaining information about the causes of species establishment. In this research, using multivariate analysis, while determining the ecological factors affecting the changes in plant composition, response of (Vicia persica) to changes in environmental factors was investigated. Sampling of vegetationwas done by systematic-random method during 2016-2018. Vegetation studies, including canopy percentage and species density, were done inside the plots. For this purpose, five transects with a length of 1000 meters were used with the same distance to each other. Then, on each of them, six plots (2 x 2 meters) were established with the same distances. In each of the plots, a soil sample was collected with three repetitions from the depth of 0 to 30 cm of the soil surface. in order to investigate the relationship between effective and significant environmental variables with vegetationand choosingchoose the appropriate linear and non-linear method, DCA was performed on the vegetation data and gradient length was determined. A generalized additive model was used to predict the response of plant species to changes in environmental factors. Canoco software version 4.5 was used for data analysisin this section. The results showed thatthe height range of this plant habitat is 2200-3400 above sea level. Investigating the effect of a set of environmental factors on vegetation changes in the habitat, led to the selection of 12 variables out of 19 primary variables. The response of the species to the variables of sand percentage, electrical conductivity, potassium and soil lime was monoexponential, the response of the species to the variables of soil acidity and stone percentage and gravel was decreasing, And the response of the species to the variables of percentage of organic matter, carbon, soil nitrogen and phosphorus, follows the incremental model. Species response to saturated humidity of soil and soil apparent specific gravity followed the bi-exponential model. In total, the results of this research showed that the generalized additive model provides valuable information for determining the ecological needs of the species, which can be considered invegetation management and rangeland improvement in similar areas.
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  • Receive Date 27 April 2024
  • Revise Date 16 July 2024
  • Accept Date 01 August 2024