Short Communication: Floristic composition and relationships between plant species abundance and soil properties in common hazel (Corylus avellana) mountainous forest of northern Iran

Abstract

Bin-Salman SA, Amasha RH, Jastaniah SD, Aly MM, Altaif K. 2018. Isolation, molecular characterization and extracellular enzymatic activity of culturable halophilic bacteria from hypersaline natural habitats. Biodiversitas 19: 1828-1834. Saline habitats, like the Dead Sea, are unusual extreme environments, due to their extreme salinity. Most saline habitats originate from the evaporation of seawater, and have a nearly neutral to slightly alkaline pH (such as the Red Sea (pH8.3) and Arabian Gulf, pH8.3). Ten halophilic bacterial strains (two Gram-negative) belonging to the family of Halomonadaceae and (eight Gram-positive), belonging to the family of Bacillaceae, were isolated from the Red Sea, Arabian Gulf, and Dead Sea by subjecting the isolates to a high salinity medium, followed by identification using 16S rRNA gene sequencing. Four of isolates were designated on the basis of their tolerance to high salinity; SBR1 exhibited 97% homology to Halomonas aquamarina, SBR2 showed 97% homology to Sediminibacillus sp., (Red Sea), SBA9 exhibited 94% homology to Halobacillus sp., (Arabian Gulf) and SBD17 gave 98% homology to Halobacillus dabanensis (Dead Sea). The isolates were also characterized by their physiological parameters, SBR1 showed optimum growth at 30°C, pH8.5 and1.5M NaCl, SBR2 at 30°C, pH6.0 and 1M NaCl. Optimum conditions for SBA9 were 35°C, pH6.5 and 1M NaCl and for SBD17, 37°C, pH7.0 and 1M NaCl.

Comparison of plant diversity between managed and unmanaged forests in Haftkhal, Mazandaran Province, North of Iran

“…The average canopy cover is the most appropriate variable in the summer season to determine the diversity of plant species (Mohammadnezhad-Kiasari et al 2018). The area of square plots was obtained by the minimal area method (Pourrahmati et al 2018;Mahmodi et al 2019). In the center of each plot, the canopy coverage of all plant species was estimated using the Van der Maarel criterion in 100 m 2 (10 × 10 m).…”

Structure and composition of tree community in the upstream area of Batang Mahat Watershed, Lima Puluh Kota District, West Sumatra, Indonesia

“…Furthermore, the plant roots disrupt the potential of erosion while also reserving groundwater by stabilizing the soil (Mingguo et al 2007). Even though the woody species richness is reported had no significant connection to soil chemical and physical characteristics (Pourrahmati et al 2018). Apart from the roots, the canopy also comprises several tree layers that help withstand rainfall and significantly reduce kinetic energy from the running water.…”