Analysis of trophic gradient through environ-mental filter influencing fish assemblage structure of the river Teesta in Eastern Himalayas

Factors controlling biodiversity and co-existence of species need immediate attention to maintain biodiversity. Co-existence between interacting species is based on their ecological niches or functional roles and can be assessed by niche assembly theory and construction of trophic guild. In the present study, the diet composition of fishes have been analyzed both qualitatively and quantitatively […]

Effect of living mulches on yield components of sunflower (Helianthus annuus L.) and weed seed productivity in line with sustainable agriculture

In order to evaluate the effects of some cover crops as living mulches on yield components of sunflower (Helianthus annuus L.) and weed seed productivity in sunflower field, an experiment was done in 2012 at the Research Field of Tabriz University, Iran. The experimental design was a randomized complete block with nine treatments in three […]

Effect of sodium azide on growth criteria, some metabolites, mitotic index and chromosomal abnormalities in Pisum sativum and Vicia faba

Seeds of Pisum sativum and Vicia faba were pre-soaked in one of three concentrations (1.0, 2.0 or 4.0 mM) of the mutagenic agent sodium azide (NaN3) for different periods (30 min, 1 h or 2 hs). The impact of these treatments on seed germination, some growth criteria, photosynthetic pigments, some metabolic activities and cytological behavior […]

Assessment of abomasal nematodes in adult sheeps in Abattoir of Baneh Iran

Livestock production covers up to 40 percent of the gross value of agricultural production globally. Abomasal nematodes of small ruminants are one of the major causes of productivity loss. This study was carried out to determine the correlation between the prevalence, seasonal incidence and geographical distribution of abomasal worm infection of native sheep in Baneh […]

Effects of various environmental conditions on morphology, genetics and some physiological factors of 8 population of red algae pertaining to Southern Coastlines of Iran

In this research which is performed during 2012 and 2013 , 8 population of red algae which were regarded as 8 suspected , and separated species were compared in 3 replications from the viewpoint of habitat , apparent form , DNA sequence in region of CholoroplasticrbcL, Protein amount , dry weight , chlorophyll and cartenoide […]

Floristic composition, life forms and geographical distribution of semi steppe pastures of Western Zagros (case study: Perdanan, West Azerbaijan, Iran)

Western forests in Iran cover more than 5 million hectares which compromised 45% of total forest of Iran. Floristic composition of this forest is poorly described while they are under sever threat of degradation. Species compositions were studied through 797 ha of Perdanan pastures in 30 km far from Piranshahr. The average rainfall is 670 […]

Investigation of site conditions of Astragalus eriostylus in South of Iran (case study: Bushehr province)

The main goal of this research is to study the effect of soil characteristics and land form on dispersion of Astragalus eriostylus in Southwest of Iran. 22 habitats of plant species have been identified as appropriate for study of vegetation in the view of area, density and mass dispersion and then soil sampling was done. […]

Comparison of RAPD and ISSR molecular markers to determine of genetic diversity in weed dodder (Cuscuta epithymum L.)

Weed dodder is a perennial herb belonging to the Convolvulaceae family and is widely used as a valuable herbal drug in traditional medicine. In this study, ISSR and RAPD markers were used to evaluation of genetic diversity of 20 genotypes of weed dodder (Cuscuta epithymum L.) from Golestan and Mazandarn provinces. 6 ISSR primers amplified […]

Preliminary checklist and aspects of the ecology of small mammals at the University of Ghana Botanical Garden, Accra Plains, Ghana

Despite serving as a teaching, research and biodiversity conservation facility for over 60 years, the faunal composition at the University of Ghana Botanical Garden (UGBG) is virtually unknown. This study documents the richness, abundance, diversity, distribution and conservation status of small mammals at the UGBG. The methodology involved live-trapping using Sherman live-traps. Overall, 39 individuals […]

The study of relationship between two cytotypes and chemotypes of Achillea millefolium L. (Asteraceae) from Iran

Cra Achillea L. (Asteraceae) comprises 115 species, which are mainly distributed in Europe, Asia and North Africa. 19 species of this genus are described in the Flora Iranica, of which Achillea milllefolium L. is a very important medicinal plant and has been used in traditional medicine. To determine the relation between cytotypes and chemotypes of […]