Inventory of Landslide as an Environmental Hazard and Investigation of its Impact on Forest (Case Study: Chafrood District; Guilan Province)
Subject Areas : Water and EnvironmentTooba Abedi 1 , seyeid ataollah Hosseini 2 , Ramin Naghdi 3
1 - Department of Environment,, Islamic Azad University.(Corresponding author)
2 - Department of Agriculture and Natural Resources, Sari University, Sari, Iran.
3 - Department of Natural Resources, Gilan University, Gilan, Iran.
Keywords: Canopy gap, pit, mound, diversity plant, richness, evenness,
Abstract :
Windthrow in forest ecosystems is due to different microsites creation that can be effective on biodiversity of plant elements. Canopy gaps and pit – mounds (PMs) creation are the most common microsites.Current reseach was considered to investigate of the effect of these microsites on diversity, richness and evenness parameters. For this purpose, twenty hectare areas considered in the Tarbiat Modares University Experimental Forest Station that is located in Mazandaran province, northern Iran. Twenty onecanopy gaps with thirty four uprooted trees were found in these areas. Line transect method was used forsampling and plant abundances were also recorded in canopy gaps. Circles plots with radius of 4 meter in intersection of PMs and 20 - 30 meter distance far from PM position were designed for recording cover percent of herbaceous plants. The diversity parameters were significantly different in canopy gaps areas. Biodiversity indices amounts had ascending trend with increasing of canopy gaps areas. PMs were significantly effective on diversityparameters also. Diversity and evenness indices showed significantly increasing on PMs position.Richness was increased on PMs, but no significant statistically difference was considered. The obtained results are indicating windthrow is effective on plant community''s dynamics, which should be considered in forest management
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