Abstract Past vegetation and environmental changes the role of climate as well human activities are major interest. The Hyrcanian region with a high number endemic species has poorly known paleoenvironmental history, especially western northern Iran. This study aims to investigate radiocarbon-dated sediment core Kholasht-Kouh Lake (KHL) for recorded between ca. 510 1180 cal yr BP. KHL is locate...

In the framework of collection and determination of coastal sand dune plants of S Caspian Sea in Gilan and Mazandaran provinces (N Iran), a new species of the family Poaceae,Cenchrus longispinus (Hack.) Fernald, was determined in coastline of Babolsar, Mazandaran. Cenchrus longispinus is closely resembles C. spinifex and C. echinatus. From the latter it is best distinguished by the absence of a...

During 2 years, from March 1987 to April 1989 ,600 samples of soil and plant were collected from different cities of northern provinces of Iran. Out of the six hundred samples 58 Actinomycetes, 9 Pseudallescheria boydii, 10 Sporothrix schenckii, and 4 Sporothrix schenckii-like fungi were isolated as the following: Streptomyces griseus from 31 samples (38.27%), Nocardia asteroides from 8 samples...

The conventional model of the day-ahead electricity markets employs an energy-based approach to manage competition among players. Under this format, it is assumed that everything (including demand and output power generating units) constant during each hour. This assumption greatly simplifies market, widely incorporated over globe. However, leads mismatches in real-time operation. With increase...

In this research, biodiversity was investigated in the species diversity level. The objective of this research was to study of Norway Maple (Acer platanoides L.) dispersion and biodiversity of associated woody species in the Shafaroud forests, Gilan (IRAN). In this regard, a 0.5 ha lozenge sample plot was selected with considering presence of Norway Maple in each site. In each plot, geographic ...

Surveys were carried out to determine species composition and host range of powdery mildews (Erysiphaceae) in Gilan province, Iran. Twenty seven taxa were identified. Among them Erysiphe circaeae, E. punicae, E. urticae, Microsphaera erlangshanensis, M. multappendicis, M. trifolii and Podosphaera clandestine/ var. cydonia are new to Iran. Parietaria officinalis and Phuopsis stylosa are new host...

Blast disease is a notorious fungal leading to dramatic yield losses on major food crops such as rice and wheat. The causal agent, Pyricularia oryzae, encompasses different lineages, each having host range. Host shifts are suspected have occurred in this species from Setaria spp. Lolium emergence of blast maize Iran was observed for the first time north country 2012. We later identified two add...

In recent years, natural substances such as zeolite have been used to absorb heavy metals in soil in an attempt to decrease their availability to plants. Compared to other techniques, the use of zeolite is fast, clean, and inexpensive. This research was carried out to investigate the effects of an Iranian natural zeolite (clinoptilolite) on stabilizing Cd-contaminated soil treated with 0.01 M C...