the toxicity of 7 herbicides to the three cyanobacteria was tested in this work. the results indicated that: (1) there was a highly significant relationship between dried weight or chlorophyll-a and od680nm for tested cyanobacteria; (2) the toxicity of the tested herbicides with the order from high to low was: photosynthesis-inhibiting > accase inhibitor > protox inhibiting herbicides; (3) the ...

Cyanobacteria are an important source of natural products. In this article, we briefly review the responses of cyanobacteria to different stresses. Abiotic stresses (temperature, salt, heavy metals, metalloid and ultraviolet (UV) influence cell growth and metabolism in cyanobacteria. Salt stress is a major abiotic factor that decrease...

aphanius ginaonis is exclusive to the geno hot spring, located in the hormozgan province. in this paper some biological aspects of aphanius ginaonis and contents of its digestive tract and its relation with cyanobacteria (blue-green algae) in the geno hot spring was examined. sampling was conducted monthly, samples were fixed in 5% formalin immediately after fishing and transferred to the ichth...

Abstract. Over the next decade, Baltic Sea is predicted to undergo severe changes including decreased salinity due altered precipitation related climate changes. This will likely impact distribution and community composition of dinitrogen-fixing (N2-fixing) microbes, among which heterocystous cyanobacteria are especially adapted low salinities may expand waters with currently higher salinity, D...

Nowadays, caves are increasingly being transformed into tourist attractions by constructing paths, electricity, water infrastructure, and the introduction of light, thereby becoming affected various disturbances that alter their inherent equilibrium. Conservation these sensitive environments should be a priority from moment opening. All parameters, including potential changes around artificial ...

Four paddy fields in Guilan province in the north of Iran seasonally were sampled from April 2008 to January 2009. Twenty-two morphospecies belonging to three families of the heterocystous blue-green algae were identified. Fourteen species and one variety of these taxa are new record for Iran. Among the families Nostocaceae with six genera and 16 species showed the highest species richness.