*Correspondence: David Delmail, CNRS UMR 6226 ISCR (Institute of Chemical Sciences of Rennes), University of Rennes 1, 2 Ave. Prof. Léon Bernard, F-35043 Rennes Cedex, France e-mail: david.delmail@ univ-rennes1.fr Inland waters are extremely sensitive to inputs of contaminants. Increasing human activities lead to a rise in organic and inorganic pollutants leading to acidification or eutrophicat...

Most often, our waterways are being polluted by municipal, agricultural and industrial wastes. When this happens, much of the available dissolved oxygen is consumed by aerobic bacteria in decomposing the waste, thereby robbing other aquatic organisms of the oxygen they need to live. In this paper, we consider the solution of the optimal control problem for the modified Dissolve Oxygen(DO)/ Biol...

The goals of this study are to develop models of radiative transfer for optically shallow waters with benthic substrates colonized by submerged aquatic vegetation (SAV). The models will enable prediction of upward spectral radiation from the seafloor, thereby permitting (i) the use of optical remote sensing to retrieve bathymetry, (ii) the search for submerged objects of anthropogenic origin an...

Food security is concerned with the food supply. Nutrition status, however, depends not only on suitable food but also on good basic health services and, particularly for children and the elderly, adequate care. Malnutrition generally results not from a lack of food in the community (limited availability) but from the skewed distribution of the food that is available. The skew results mainly be...

_ _ Acid deposition has aroused concern about aquatic organisms in soft water lakes and streams, as the loss of indigenous species is commonly observed when pH decreases. This literature review was initiated to intensively examine the distribution of invertebrates with respect to pH, in order to define the tolerance limits of various species in acidified waters and predict how acidification wou...

Toxicity tests were performed with seven fluoroquinolone antibiotics, ciprofloxacin, lomefloxacin, ofloxacin, levofloxacin, clinafloxacin, enrofloxacin, and flumequine, on five aquatic organisms. Overall toxicity values ranged from 7.9 to 23,000 microg/L. The cyanobacterium Microcystis aeruginosa was the most sensitive organism (5-d growth and reproduction, effective concentrations [EC50s] rang...

The use of constructed wetlands is a relatively new technology but the system is gaining popularity due to its low tech system for treating wastewater (DeBusk, 1999b).Constructed wetlands have found to be effective in treating domestic wastewater where municipalities are concerned with reducing suspended solids, organic matter, phosphorus, nitrogen, and pathogens. Constructed wetlands mimic nat...

3 Minmin Chen, Michael C. Fontaine*, Yacine Ben Chehida, Jinsong Zheng*, Frédéric 4 Labbé, Zhigang Mei, Yujiang Hao, Kexiong Wang, Min Wu, Qingzhong Zhao, Ding 5 Wang* 6 7 1 The Key Laboratory of Aquatic Biodiversity and Conservation of Chinese Academy of Sciences, 8 Institute of Hydrobiology of Chinese Academy of Sciences, Wuhan 430072, China; 9 2 Research Center of Aquatic Organism Conservati...

Aquatic vegetation in rivers often modifies hydraulic resistance and can enhance seasonally occurring flooding. To which extent a plant constitutes an obstacle in the flow is strongly influenced by its biomechanical traits which determine the ability of plants to reconfigure in the flow, i.e. to adopt a shape that minimizes drag forces and hence to smooth the flow dynamics in and around submerg...

© Thinkk/y-studio W ater is essential to life, supporting the food web and habitat for much of Earth’s wildlife. Pesticides often contaminate U.S. waterways and threaten aquatic organisms, from invertebrates (worms, molluscs, insects, and zooplankton) to vertebrates (fish and amphibians), and microorganisms (bacteria, fungi, protozoa, algae, and phytoplankton), as well as those that depend on t...