نتایج جستجو برای: phytoplanktons

تعداد نتایج: 61  

Journal: :European journal of environment and earth sciences 2023

Calcium chloride (CaCl2) is an inorganic chemical from the group, and it widely used as one of snow removal agents on road in winter. Laboratory experiments were conducted to examine effects salt (NaCl) soil organisms (a animal, microorganisms, plankton). The dwelling Armadillidium vulgare died high concentration calcium treatment. longer processing time A. at chloride, lower survival rate. 16%...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
Daniel Tam A E Hosoi

Locomotion is widely observed in life at micrometric scales and is exhibited by many eukaryotic unicellular organisms. Motility of such organisms can be achieved through periodic deformations of a tail-like projection called the eukaryotic flagellum. Although the mechanism allowing the flagellum to deform is largely understood, questions related to the functional significance of the observed be...

Journal: :international journal of aquatic biology 0
saeed balali abbas hoseini rasool ghorbnia hamideh kordi elahe amooee khozani

this study investigated the relationships between nutrients and chlorophyll, a concentration in the international alma gol wetland. chlorophyll a is the major photosynthetic pigment in lots of phytoplanktons and has been used as a trophy index in aquatic ecosystems. water samples were collected fortnightly from five stations in the wetland during summer and autumn. chlorophyll-a ranged between ...

2017
Sheng-Ao Liu Huaichun Wu Shu-zhong Shen Ganqing Jiang Shihong Zhang Yiwen Lv Hua Zhang Shuguang Li

The end-Permian extinction is typically ascribed to massive volcanic eruptions, but direct geochemical evidence linking the two independent events is generally lacking. Zinc is an important micronutrient of marine phytoplanktons, and Zn isotope (d66Zn) ratios of seawater are markedly higher than those of volcanic rocks and riverine waters. We conducted high-resolution Zn concentration and Zn is...

Journal: :محیط شناسی 0
مریم حسناتی دانشگاه علوم و فنون دریایی خرمشهر ، کارشناس ارشد آلودگی دریا احمد سواری دانشگاه علوم و فنون دریایی خرمشهر، دانشیار اکوفیزیولوژی یدا نیک پور دانشگاه علوم و فنون دریایی خرمشهر، استادیار شیمی کمال غانمی دانشگاه علوم و فنون دریایی خرمشهر ، استادیار شیمی

the major sources of pahs are anthropogenic. these may be generated by pyrolytic and petrogenic processes. low molecular weight pahs come into the aquatic system through the accidentally leakage of oil spills. incomplete combustion at high temperature will release high molecular weight pahs by products of pyrolytic processes. the methods for assigning sources of pahs include paired isomeric rat...

2012
HEMANT KUMAR KHUNTIA SURYA KANTA SAMAL ASHOK KUMAR SARANGI SUDEEP RANJAN

Toxigenic Vibrio cholerae is the etiological agent of cholera, an acute dehydrating diarrhoea that occurs in epidemic form in many developing countries. Aquatic ecosystem is the major habitat of toxigenic V. cholerae, where it interacts with various abiotic and biotic factors to survive. To acknowledge the seasonal appearance, endemic nature and genetic deviation of V. cholerae it is essential ...

Journal: :npj climate and atmospheric science 2021

Abstract As the phytoplanktons consume carbon dioxide, they significantly influence global cycle and thus, temperature by modifying sea surface temperature. Studies on changes in chlorophyll–a (Chl-a) amount are therefore, key for understanding ocean productivity, budget climate. Here, we report cyclone-induced Chl-a blooms North Indian Ocean (NIO) using colour measurements from satellites past...

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