In order to survey on probably variety of temperature in a planted area compare to none planted area selected 50 Ha of planted land of near the Dez dam in shahyon of Dezful . For data comparing selected area 10 Ha as well as buffer zone in out o More
In order to survey on probably variety of temperature in a planted area compare to none planted area selected 50 Ha of planted land of near the Dez dam in shahyon of Dezful . For data comparing selected area 10 Ha as well as buffer zone in out of planted land .Then based on Random-systematic method, 3 thermometer maximum-minimum in the stable line altitude 520 meter up the sea level in planted land & 3 thermometer in none planted land in same line were installed too. Harvested data duration one month after assemblage and analysis showed that emperature difference in two areas was very salient and it was proximate to 3 c.Temperature vibration in plated land lower than none planted land meaningful
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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 More
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 one canopy gaps with thirty four uprooted trees were found in these areas. Line transect method was used for sampling 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 diversity parameters 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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