concern about arsenic pollution to soils and plants has been on an increase, throughout the world and an interaction of as with p due to the similarity in chemical characteristics has been also reported. in the present research, a factorial experiment was conducted as based upon a randomized complete block design of three replications including three levels of arsenic (0, 50 and 100 mg kg-1) fr...

Identification of the proximal nutrient limiting primary production is a necessary first step toward evaluating the physiological state of phytoplankton communities and the biogeochemical constraints on the current oceanic carbon cycle. We conducted 48-h nutrient addition bioassay experiments to evaluate nitrogen, phosphorus, and iron limitation of primary productivity, net chlorophyll synthesi...

Nutrient addition bioassay experiments were performed in the low-nutrient, low-chlorophyll oligotrophic subtropical North Atlantic Ocean to investigate the influence of nitrogen (N), phosphorus (P), and/or iron (Fe) on phytoplankton physiology and the limitation of primary productivity or picophytoplankton biomass. Additions of N alone resulted in 1.5–2 fold increases in primary productivity an...

essential oils from aerial parts of mentha spicata, was obtained by steam destillation using a clevenger-type system. these oils were screened for antibacterial and anti-candida albicans activity using bioautographic method. a fiel experiments was laid out in agricultural research farm, city namin, ardabil province, iran in 2013. experiment was conducted in a randomized complete block with seve...

Decomposition of natural populations of Lake Mendota phytoplankton dominated by blue-green algae (cyanobacteria) was monitored by using oxygen uptake and disappearance of chlorophyll, algal volume (fluorescence microscopy), particulate protein, particulate organic carbon, and photosynthetic ability (CO(2) up-take). In some experiments, decomposition of C-labeled axenic cultures of Anabaena sp. ...

Chlorophyll and total phosphorus (TP) concentrations are key indicators of lake water quality the relationship between them is a common tool for assessing trophic status. Despite application chlorophyll–TP in management settings, there still an absence mechanistic understanding underlying its shape. We leveraged process-based model that focuses primarily on biogeochemical physiological mechanis...

Chlorophyll trends in subtropical and tropical estuaries are under characterized may reveal patterns not shared by their temperate analogues. Detection of requires long-term monitoring programs, but these uncommon. In this study, we utilized an 18-year chlorophyll- a time series from 2002 to 2020 Weeks Bay, AL, detect quantify chlorophyll variability over multiple scales. Our analysis included ...

Bryophyte communities can exhibit similar structural and taxonomic diversity as vascular plant communities, just at a smaller scale. Whether the physiological diversity can be similarly diverse, and whether it can explain local abundance patterns is unknown, due to a lack of community-wide studies of physiological traits. This study re-analyzed data on photosynthesis-related traits (including t...