the genus calendula belongs to tribe calenduleae, (asteraceae family). itmorphologically studied for the ongoing project of the flora of iran. based on the herbarium studies and field observation, this genus has been revised. the study was based on fresh material from field as well as herbarium specimens. all specimens existed in the herbarium of research institute of forests and rangelands (ta...

There are a number of reservoirs in the West Zarafshan Range, which have their own water-saturated, hydrographic, soil and ecological features. In this regard, algoflora is also formed its way. As result research area, 217 species algae were identified, belonging to 5 divisions, 11 classes, 37 orders, 57 families 97 genera. The development distribution organisms water influenced by external fac...

Nutrient enrichment in water and sediments due to excessive anthropogenic activities in recent years has caused excessive algal growth in the Caspian Sea. The current study was conducted to determine the abundance of phytoplankton community, the dominant species and chlorophyll-a [Chl-a] concentration during algal blooms in the Iranian coastal waters of Caspian Sea through four seasons from 201...

Nutrient enrichment in water and sediments due to excessive anthropogenic activities in recent years has caused excessive algal growth in the Caspian Sea. The current study was conducted to survey the abundance of phytoplankton, its dominant species and chlorophyll-a [Chl-a] concentration in algal bloom aspect in the Iranian coastal water of Caspian Sea during four seasons from 2013 to 2014. Th...