keyword
MENU ▼
Read by QxMD icon Read
search

Aquatic productivity

keyword
https://www.readbyqxmd.com/read/27920386/does-eutrophication-driven-evolution-change-aquatic-ecosystems
#1
REVIEW
Timothy J Alexander, Pascal Vonlanthen, Ole Seehausen
Eutrophication increases primary production and changes the relative abundance, taxonomic composition and spatial distribution of primary producers within an aquatic ecosystem. The changes in composition and location of resources alter the distribution and flow of energy and biomass throughout the food web. Changes in productivity also alter the physico-chemical environment, which has further effects on the biota. Such ecological changes influence the direction and strength of natural and sexual selection experienced by populations...
January 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/27919757/dietary-administration-of-bacillus-subtilis-hainup40-enhances-growth-digestive-enzyme-activities-innate-immune-responses-and-disease-resistance-of-tilapia-oreochromis-niloticus
#2
Haitian Liu, Shifeng Wang, Yan Cai, Xiaohui Guo, Zhenjie Cao, Yongzheng Zhang, Shubin Liu, Wei Yuan, Weiwei Zhu, Yu Zheng, Zhenyu Xie, Weiliang Guo, Yongcan Zhou
The probiotic properties of Bacillus subtilis HAINUP40 isolated from the aquatic environment, and the effects of dietary administration of B. subtilis HAINUP40 on the growth performance, intestinal probiotic recovery, digestive enzyme activities, innate immunity and disease resistance of tilapia (Oreochromis niloticus) were evaluated. The probiotic properties investigated include tolerance to simulated gastrointestinal stress, auto-aggregation, cell surface hydrophobicity and extracellular enzyme production...
December 2, 2016: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/27919541/pesticides-drive-risk-of-micropollutants-in-wastewater-impacted-streams-during-low-flow-conditions
#3
Nicole A Munz, Francis J Burdon, Dick de Zwart, Marion Junghans, Laura Melo, Marta Reyes, Urs Schönenberger, Heinz P Singer, Barbara Spycher, Juliane Hollender, Christian Stamm
Micropollutants enter surface waters through various pathways, of which wastewater treatment plants (WWTPs) are a major source. The large diversity of micropollutants and their many modes of toxic action pose a challenge for assessing environmental risks. In this study, we investigated the potential impact of WWTPs on receiving ecosystems by describing concentration patterns of micropollutants, predicting acute risks for aquatic organisms and validating these results with macroinvertebrate biomonitoring data...
November 3, 2016: Water Research
https://www.readbyqxmd.com/read/27919296/antimicrobial-resistance-in-salmonella-that-caused-foodborne-disease-outbreaks-united-states-2003-2012
#4
A C Brown, J E Grass, L C Richardson, A L Nisler, A S Bicknese, L H Gould
Although most non-typhoidal Salmonella illnesses are self-limiting, antimicrobial treatment is critical for invasive infections. To describe resistance in Salmonella that caused foodborne outbreaks in the United States, we linked outbreaks submitted to the Foodborne Disease Outbreak Surveillance System to isolate susceptibility data in the National Antimicrobial Resistance Monitoring System. Resistant outbreaks were defined as those linked to one or more isolates with resistance to at least one antimicrobial drug...
December 6, 2016: Epidemiology and Infection
https://www.readbyqxmd.com/read/27916306/mass-loading-and-emission-of-benzophenone-3-bp-3-and-its-derivatives-in-wastewater-treatment-plants-in-new-york-state-usa
#5
Wei Wang, Kurunthachalam Kannan
The occurrence of benzophenone type ultra-violet (UV) light filters, especially 2-hydroxy-4-methoxy benzophenone (2OH-4MeO-BP; BP-3), in aquatic ecosystems is a concern due to the endocrine disruption potential of these chemicals. In this study, mass loading, emission and fate of BP-3 and its derivatives were investigated in two wastewater treatment plants (WWTPs) in the Albany area of New York State, USA. The median concentrations of BP-3 and sum of its four derivatives (ΣBPderivatives) in influents were 35...
December 1, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27915412/formation-of-indigoidine-derived-pigments-contributes-to-the-adaptation-of-vogesella-sp-strain-eb-to-cold-aquatic-iron-oxidizing-environments
#6
Paula Arrúa Day, María S Villalba, O Marisa Herrero, Luz Alejandra Arancibia, Héctor M Alvarez
We investigated previously under explored cold aquatic environments of Andean Patagonia, Argentina. Oily sheens similar to an oil spill are frequently observed at the surface of water in creeks and small ponds in these places. Chemical analysis of a water sample revealed the occurrence of high concentrations of iron and the presence of a free insoluble indigoidine-derived pigment. A blue pigment-producing bacterium (strain EB) was isolated from the water sample and identified as Vogesella sp. by molecular analysis...
December 3, 2016: Antonie Van Leeuwenhoek
https://www.readbyqxmd.com/read/27915141/a-review-of-the-occurrence-of-pharmaceuticals-and-personal-care-products-in-indian-water-bodies
#7
REVIEW
Keshava Balakrishna, Amlan Rath, Yerabham Praveenkumarreddy, Keerthi Siri Guruge, Bikram Subedi
Little information exists on the occurrence and the ultimate fate of pharmaceuticals in the water bodies in India despite being one of the world leaders in pharmaceutical production and consumption. This paper has reviewed 19 published reports of pharmaceutical occurrence in the aquatic environment in India [conventional activated sludge wastewater treatment plants (WTPs), hospital WTPs, rivers, and groundwater]. Carbamazepine (antipsychoactive), atenolol (antihypertensive), triclocarban and triclosan (antimicrobials), trimethoprim and sulfamethoxazole (antibacterials), ibuprofen and acetaminophen (analgesics), and caffeine (stimulant) are the most commonly detected at higher concentrations in Indian WTPs that treat predominantly the domestic sewage...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27913023/in-stream-metabolism-and-atmospheric-carbon-sequestration-in-a-groundwater-fed-karst-stream
#8
Junbing Pu, Jianhong Li, Mitra B Khadka, Jonathan B Martin, Tao Zhang, Shi Yu, Daoxian Yuan
Atmospheric carbon sequestered in karst systems through dissolution of carbonate minerals is considered to have no net effect on long-term regional and global carbon budgets because precipitation of dissolved carbonate minerals emits CO2 back to the atmosphere. Even though recent studies have implied that rapid kinetics of carbonate dissolution coupled with the aquatic photosynthetic uptake of dissolve inorganic carbon (DIC) could facilitate a stable atmospheric C sink in karst rivers and streams, little is known about the magnitudes and long-term stability of this C sink...
November 29, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27903801/inhibition-of-an-aquatic-rhabdovirus-demonstrates-promise-of-a-broad-spectrum-antiviral-for-use-in-aquaculture
#9
Bethany F Balmer, Rachel L Powers, Ting-Hu Zhang, Jihye Lee, Frederic Vigant, Benhur Lee, Michael E Jung, Maureen K Purcell, Kevin Snekvik, Hector C Aguilar
: Many enveloped viruses cause devastating disease in aquaculture, resulting in significant economic impact. LJ001 is a broad-spectrum antiviral compound that inhibits enveloped viral infections by specifically targeting phospholipids in the lipid bilayer via production of singlet oxygen ((1)O2). This stabilizes positive curvature and decreases membrane fluidity, which inhibits viral-cell membrane fusion during viral entry. Based on previous mammalian studies and the requirement of light for activation of LJ001, we hypothesized that LJ001 may be useful as a preventative and/or therapeutic agent for enveloped viral infections in aquaculture...
November 30, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27901630/emerging-pollutant-treatments-in-wastewater-cases-of-antibiotics-and-hormones
#10
Erika Méndez, Miguel A González-Fuentes, Georgette Rebollar-Perez, Alia Méndez-Albores, Eduardo Torres
Because of the intensive use of pharmaceutical substances in human life, studies on the detection of these chemical compounds and their metabolites as pollutants in water bodies are continuously reported. Some pharmaceutical agents are associated with adverse effects to aquatic life, even at very low concentrations (ng L(-1) to μg L(-1)). For instance, the presence of antibiotics and hormones has been associated with increasing proliferation of antibiotic resistant pathogens and feminization and masculinization of some aquatic organisms...
November 30, 2016: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/27896479/body-size-drives-allochthony-in-food-webs-of-tropical-rivers
#11
Timothy D Jardine, Thomas S Rayner, Neil E Pettit, Dominic Valdez, Douglas P Ward, Garry Lindner, Michael M Douglas, Stuart E Bunn
Food web subsidies from external sources ("allochthony") can support rich biological diversity and high secondary and tertiary production in aquatic systems, even those with low rates of primary production. However, animals vary in their degree of dependence on these subsidies. We examined dietary sources for aquatic animals restricted to refugial habitats (waterholes) during the dry season in Australia's wet-dry tropics, and show that allochthony is strongly size dependent. While small-bodied fishes and invertebrates derived a large proportion of their diet from autochthonous sources within the waterhole (phytoplankton, periphyton, or macrophytes), larger animals, including predatory fishes and crocodiles, demonstrated allochthony from seasonally inundated floodplains, coastal zones or the surrounding savanna...
November 28, 2016: Oecologia
https://www.readbyqxmd.com/read/27895051/metabolism-and-antioxidant-defense-in-the-larval-chironomid-tanytarsus-minutipalpus-adjustments-to-diel-variations-in-the-extreme-conditions-of-lake-magadi
#12
Lucas F Bianchini, Chris M Wood, Harold L Bergman, Ora E Johannsson, Pierre Laurent, Claudine Chevalier, Mosiany L Kisipan, Geraldine D Kavembe, Michael B Papah, Kevin V Brix, Gudrun De Boeck, John N Maina, Rodi O Ojoo, Adalto Bianchini
Insect larvae are reported to be a major component of the simple but highly productive trophic web found in Lake Magadi (Kenya, Africa), which is considered to be one of the most extreme aquatic environments on Earth. Previous studies show that fish must display biochemical and physiological adjustments to thrive under the extreme conditions of the lake. However, information for invertebrates is lacking. In the present study, the occurrence of the larval chironomid Tanytarsus minutipalpus is reported in Lake Magadi for the first time...
November 28, 2016: Biology Open
https://www.readbyqxmd.com/read/27892495/quorum-regulated-resistance-of-vibrio-cholerae-against-environmental-bacteriophages
#13
M Mozammel Hoque, Iftekhar Bin Naser, S M Nayeemul Bari, Jun Zhu, John J Mekalanos, Shah M Faruque
Predation by bacteriophages can significantly influence the population structure of bacterial communities. Vibrio cholerae the causative agent of cholera epidemics interacts with numerous phages in the aquatic ecosystem, and in the intestine of cholera patients. Seasonal epidemics of cholera reportedly collapse due to predation of the pathogen by phages. However, it is not clear how sufficient number of the bacteria survive to seed the environment in the subsequent epidemic season. We found that bacterial cell density-dependent gene expression termed "quorum sensing" which is regulated by signal molecules called autoinducers (AIs) can protect V...
November 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27889512/genotoxicity-and-growth-inhibition-effects-of-aniline-on-wheat
#14
Nan Tao, Guanyi Liu, Lu Bai, Lu Tang, Changhong Guo
Aniline is a synthetic compound widely used in industrial and pesticide production, which can lead to environmental pollution. Its high concentration in rivers and lakes is hazardous to aquatic species. Although the mechanism of aniline toxicity has been studied extensively in animals and algae, little is known about its genotoxicity in plants. In this study, we investigated the genotoxicity effects of aniline on wheat root tip cells. The mitotic index of wheat root tip cells decreased when the aniline test concentration was higher than 10 mg L(-1)...
November 24, 2016: Chemosphere
https://www.readbyqxmd.com/read/27878175/synergistic-effects-of-mining-and-urban-effluents-on-the-level-and-distribution-of-methylmercury-in-a-shallow-aquatic-ecosystem-of-the-bolivian-altiplano
#15
L Alanoca, S Guédron, D Amouroux, S Audry, M Monperrus, E Tessier, S Goix, D Acha, P Seyler, D Point
Lake Uru Uru (3686 m a.s.l.) located in the Bolivian Altiplano region receives both mining effluents and urban wastewater discharges originating from the surrounding local cities which are under rapid development. We followed the spatiotemporal distribution of different mercury (Hg) compounds and other metal(oid)s (e.g., Fe, Mn, Sb, Ti and W) in both water and sediments during the wet and dry seasons along a north-south transect of this shallow lake system. Along the transect, the highest Hg and metal(oid) concentrations in both water and sediments were found downstream of the confluences with mining effluents...
November 23, 2016: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/27871041/toxicity-of-aqueous-vanadium-to-zooplankton-and-phytoplankton-species-of-relevance-to-the-athabasca-oil-sands-region
#16
Stephanie Schiffer, Karsten Liber
Vanadium (V) is an abundant trace metal present in bitumen from the Athabasca Oil Sands (AOS) region in Alberta, Canada. The upgrading of bitumen can result in the production of large volumes of a carbonaceous material referred to as petroleum coke that contains V at elevated levels compared to the native bitumen. Previous studies have shown that coke has the capacity to leach ecotoxicologically relevant levels of V into water it contacts, yet limited data are available on the toxicity of aqueous V to planktonic organisms...
November 18, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27870966/biochemical-effects-of-fipronil-and-its-metabolites-on-lipid-peroxidation-and-enzymatic-antioxidant-defense-in-tadpoles-eupemphix-nattereri-leiuperidae
#17
Hortênsia S Gripp, Juliane S Freitas, Eduardo A Almeida, Márcia C Bisinoti, Altair B Moreira
Amphibians are very sensitive to environmental change and pollution because they have both aquatic and terrestrial life cycle stages and high skin permeability. Particularly during the larval stages, when these animals are restricted to small, transient ponds, exposure to high concentrations of pesticides is inevitable in agricultural areas. Given that pesticide application increases during the summer, which coincides with the reproductive season and the occurrence of most neotropical tadpoles in their natural environment, strong indications exist that tadpoles are developing in contaminated ponds...
November 18, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27869191/solar-output-controls-periodicity-in-lake-productivity-and-wetness-at-southernmost-south-america
#18
Marta Pérez-Rodríguez, Benjamin-Silas Gilfedder, Yvonne-Marie Hermanns, Harald Biester
Cyclic changes in total solar irradiance (TSI) during the Holocene are known to affect global climatic conditions and cause cyclic climatic oscillations, e.g., Bond events and related changes of environmental conditions. However, the processes how changes in TSI affect climate and environment of the Southern Hemisphere, especially in southernmost South America, a key area for the global climate, are still poorly resolved. Here we show that highly sensitive proxies for aquatic productivity derived from sediments of a lake near the Chilean South Atlantic coast (53 °S) strongly match the cyclic changes in TSI throughout the Holocene...
November 21, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27866342/phototoxicity-and-chronic-toxicity-of-methyl-paraben-and-1-2-hexanediol-in-daphnia-magna
#19
Jiyun Lee, Nayeon Park, Younglim Kho, Kiyoung Lee, Kyunghee Ji
Parabens are used as antimicrobial preservatives in consumer products. Exposure to methylparaben (MP) has been associated with adverse health outcomes, therefore, an alternative compound, 1,2-hexanediol (1,2-H), has been applied for cosmetics. In the present study, the phototoxicity of MP and 1,2-H, as well as the toxic effect caused by chronic exposure, were investigated using Daphnia magna. The 48 h acute toxicity tests with D. magna were conducted under indoor or ultraviolet (UV) light irradiation conditions, i...
November 19, 2016: Ecotoxicology
https://www.readbyqxmd.com/read/27866107/perturbation-free-measurement-of-in-situ-di-nitrogen-emissions-from-denitrification-in-nitrate-rich-aquatic-ecosystems
#20
Shuping Qin, Timothy Clough, Jiafa Luo, Nicole Wrage-Mönnig, Oene Oenema, Yuming Zhang, Chunsheng Hu
Increased production of reactive nitrogen (Nr) from atmospheric di-nitrogen (N2) has greatly contributed to increased food production. However, enriching the biosphere with Nr has also caused a series of negative effects on global ecosystems, especially aquatic ecosystems. The main pathway converting Nr back into the atmospheric N2 pool is the last step in the denitrification process. Despite several attempts, there is still a need for perturbation-free methods for measuring in situ N2 fluxes from denitrification in aquatic ecosystems at the field scale...
November 12, 2016: Water Research
keyword
keyword
43358
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"