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https://www.readbyqxmd.com/read/28098819/low-cost-and-flexible-uav-deployment-of-sensors
#1
Lars Yndal Sørensen, Lars Toft Jacobsen, John Paulin Hansen
This paper presents a platform for airborne sensor applications using low-cost, open-source components carried by an easy-to-fly unmanned aircraft vehicle (UAV). The system, available in open-source , is designed for researchers, students and makers for a broad range of exploration and data-collection needs. The main contribution is the extensible architecture for modularized airborne sensor deployment and real-time data visualisation. Our open-source Android application provides data collection, flight path definition and map tools...
January 14, 2017: Sensors
https://www.readbyqxmd.com/read/28098343/mn-accumulation-in-a-submerged-plant-egeria-densa-hydrocharitaceae-is-mediated-by-epiphytic-bacteria
#2
Kousuke Tsuji, Takuma Asayama, Nozomi Shiraki, Shota Inoue, Erina Okuda, Chizuru Hayashi, Kazuma Nishida, Hiroshi Hasegawa, Emiko Harada
Many aquatic plants act as biosorbents, removing and recovering metals from the environment. To assess the biosorbent activity of Egeria densa, a submerged freshwater macrophyte, plants were collected monthly from a circular drainage area in Lake Biwa basin and the Mn concentrations of the plants were analyzed. Mn concentrations in these plants were generally above those of terrestrial hyperaccumulators, and were markedly higher in spring and summer than in autumn. Mn concentrations were much lower in plants incubated in hydroponic medium at various pH levels with and without Mn supplementation than in field-collected plants...
January 18, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28098255/annual-time-series-analysis-of-aqueous-edna-reveals-ecologically-relevant-dynamics-of-lake-ecosystem-biodiversity
#3
Iliana Bista, Gary R Carvalho, Kerry Walsh, Mathew Seymour, Mehrdad Hajibabaei, Delphine Lallias, Martin Christmas, Simon Creer
The use of environmental DNA (eDNA) in biodiversity assessments offers a step-change in sensitivity, throughput and simultaneous measures of ecosystem diversity and function. There remains, however, a need to examine eDNA persistence in the wild through simultaneous temporal measures of eDNA and biota. Here, we use metabarcoding of two markers of different lengths, derived from an annual time series of aqueous lake eDNA to examine temporal shifts in ecosystem biodiversity and in an ecologically important group of macroinvertebrates (Diptera: Chironomidae)...
January 18, 2017: Nature Communications
https://www.readbyqxmd.com/read/28097795/impaired-n-linked-glycosylation-of-uptake-and-efflux-transporters-in-human-nonalcoholic-fatty-liver-disease
#4
John D Clarke, Petr Novak, April D Lake, Rhiannon N Hardwick, Nathan J Cherrington
BACKGROUND & AIMS: N-linked glycosylation of proteins is critical for proper protein folding and trafficking to the plasma membrane. Drug transporters are one class of proteins that have reduced function when glycosylation is impaired. N-linked glycosylation of plasma proteins has also been investigated as a biomarker for several liver diseases, including non-alcoholic fatty liver disease (NAFLD). The purpose of this study was to assess the transcriptomic expression of genes involved in protein processing and glycosylation, and to determine the glycosylation status of key drug transporters during human NAFLD progression...
January 18, 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28097496/historical-trends-of-organochlorine-pesticides-ocps-recorded-in-sediments-across-the-tibetan-plateau
#5
Ruiqiang Yang, Ting Xie, Handong Yang, Simon Turner, Guangjian Wu
Sediment cores from four lakes across the Tibetan Plateau were used as natural archives to study the time trends of organochlorine pesticides (OCPs). The total concentrations of dichlorodiphenyltrichloroethane (ΣDDT) and hexachlorocyclohexane isomers (ΣHCH) were in the range of 0.04-1.61 and 0.08-1.88 ng/g based on dry weight (dw), while the input fluxes were in the range of 0.3-236 and 0.7-295 pg/cm(2)/y in the core sediments, respectively. The input fluxes of ΣDDT and ΣHCH generally peaked in sediment layers corresponding to the 1970s-1990s and peaked in top sediment layers...
January 17, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28097495/the-expression-of-hypoxia-inducible-factor-1%C3%AE-gene-is-not-affected-by-low-oxygen-conditions-in-yellow-perch-perca-flavescens-juveniles
#6
Karolina Kwasek, Simona Rimoldi, Anna Giulia Cattaneo, Timothy Parker, Konrad Dabrowski, Genciana Terova
Hypoxia can affect various fish populations, including yellow perch Perca flavescens, which is an economically and ecologically important species in Lake Erie, a freshwater system that often experiences hypoxia in the hypolimnetic part of the lake. Fish, similarly to mammals, possess molecular oxygen sensor-hypoxia-inducible factor-1 (HIF-1), a transcription factor that can affect expression of many downstream genes related to animal growth and locomotion, protein synthesis, as well as ATP and amino acid metabolism...
January 18, 2017: Fish Physiology and Biochemistry
https://www.readbyqxmd.com/read/28097071/the-fishing-and-natural-mortality-of-large-piscivorous-bull-trout-and-rainbow-trout-in-kootenay-lake-british-columbia-2008-2013
#7
Joseph L Thorley, Greg F Andrusak
BACKGROUND: Estimates of fishing and natural mortality are important for understanding, and ultimately managing, commercial and recreational fisheries. High reward tags with fixed station acoustic telemetry provides a promising approach to monitoring mortality rates in large lake recreational fisheries. Kootenay Lake is a large lake which supports an important recreational fishery for large Bull Trout and Rainbow Trout. METHODS: Between 2008 and 2013, 88 large (≥500 mm) Bull Trout and 149 large (≥500 mm) Rainbow Trout were marked with an acoustic transmitter and/or high reward ($100) anchor tags in Kootenay Lake...
2017: PeerJ
https://www.readbyqxmd.com/read/28097057/a-gene-expression-study-of-dorso-ventrally-restricted-pigment-pattern-in-adult-fins-of-neolamprologus-meeli-an-african-cichlid-species
#8
Ehsan Pashay Ahi, Kristina M Sefc
Fish color patterns are among the most diverse phenotypic traits found in the animal kingdom. Understanding the molecular and cellular mechanisms that control in chromatophore distribution and pigmentation underlying this diversity is a major goal in developmental and evolutionary biology, which has predominantly been pursued in the zebrafish model system. Here, we apply results from zebrafish work to study a naturally occurring color pattern phenotype in the fins of an African cichlid species from Lake Tanganyika...
2017: PeerJ
https://www.readbyqxmd.com/read/28097050/microbial-communities-mediating-algal-detritus-turnover-under-anaerobic-conditions
#9
Jessica M Morrison, Chelsea L Murphy, Kristina Baker, Richard M Zamor, Steve J Nikolai, Shawn Wilder, Mostafa S Elshahed, Noha H Youssef
BACKGROUND: Algae encompass a wide array of photosynthetic organisms that are ubiquitously distributed in aquatic and terrestrial habitats. Algal species often bloom in aquatic ecosystems, providing a significant autochthonous carbon input to the deeper anoxic layers in stratified water bodies. In addition, various algal species have been touted as promising candidates for anaerobic biogas production from biomass. Surprisingly, in spite of its ecological and economic relevance, the microbial community involved in algal detritus turnover under anaerobic conditions remains largely unexplored...
2017: PeerJ
https://www.readbyqxmd.com/read/28095292/should-enteroviruses-be-monitored-in-natural-recreational-waters
#10
Soňa Šarmírová, Viera Nagyová, Darina Štípalová, Iveta Drastichová, Danka Šimonyiová, Zuzana Sirotná, Renáta Kissová, Katarína Pastuchová, Jana Tirpáková, Daniel Kuba, Cyril Klement, Shubhada Bopegamage
Enteroviruses (EVs) infections occur worldwide. Although, infections by these viruses are often asymptomatic and go unnoticed, they can be shed in stool for several weeks. The EVs re associated with sporadic outbreaks and a wide range of clinical symptoms, occasionally accompanied with fatal consequences. Presently in the Slovak Republic (SR) recreational waters are tested only for bacterial indicators. Our aim was to monitor EVs in recreational waters. Water samples were collected during the years 2012-2014 from different recreational natural lakes in Central and West regions of SR...
December 2016: Central European Journal of Public Health
https://www.readbyqxmd.com/read/28094773/methane-emissions-and-microbial-communities-as-influenced-by-dual-cropping-of-azolla-along-with-early-rice
#11
Jingna Liu, Heshui Xu, Ying Jiang, Kai Zhang, Yuegao Hu, Zhaohai Zeng
Azolla caroliniana Willd. is widely used as a green manure accompanying rice, but its ecological importance remains unclear, except for its ability to fix nitrogen in association with cyanobacteria. To investigate the impacts of Azolla cultivation on methane emissions and environmental variables in paddy fields, we performed this study on the plain of Dongting Lake, China, in 2014. The results showed that the dual cropping of Azolla significantly suppressed the methane emissions from paddies, likely due to the increase in redox potential in the root region and dissolved oxygen concentration at the soil-water interface...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28094439/adaptive-evolution-to-novel-predators-facilitates-the-evolution-of-damselfly-species-range-shifts
#12
Adam M Siepielski, Jeremy M Beaulieu
Most species have evolved adaptations to reduce the chances of predation. In many cases adaptations to coexist with one predator generate tradeoffs in the ability to live with other predators. Consequently, the ability to live with one predator may limit the geographic distributions of species, such that adaptive evolution to coexist with novel predators may facilitate range shifts. In a case study with Enallagma damselflies, we used a comparative phylogenetic approach to test the hypothesis that adaptive evolution to live with a novel predator facilitates range size shifts...
January 17, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28093321/sulfur-compound-oxidation-and-carbon-co-assimilation-in-the-haloalkaliphilic-sulfur-oxidizers-thioalkalivibrio-versutus-and-thioalkalimicrobium-aerophilum
#13
Wee Kiong Ang, Mahbob Maisarah, Rabeb Dhouib, Ulrike Kappler
Alkaliphilic sulfur-oxidizing bacteria are highly abundant in naturally occurring soda lakes,where they are found both in surface waters and sediments. Here we studied oxidation of sulfide and thiosulfate in batch cultures of Thioalkalimicrobium aerophilum and Thioalkalivibrio versutus, two species that represent different metabolic types, as indicated by the absence or presence of sulfur production during growth, respectively. With thiosulfate, both species showed the expected sulfur oxidation patterns; however, during growth on sulfide, both T...
January 13, 2017: Research in Microbiology
https://www.readbyqxmd.com/read/28093017/the-bone-health-team
#14
Phillip T Lawrence, Marissa P Grotzke, Yanina Rosenblum, Richard E Nelson, Joanne LaFleur, Karla L Miller, Junjie Ma, Grant W Cannon
BACKGROUND: Significant improvements in secondary prevention of osteoporotic fractures have been noted with fracture liaison services. However, similar models for the primary prevention of such fractures have not been reported. OBJECTIVE: To determine the impact of a Bone Health Team (BHT) on osteoporosis screening and treatment rates in U.S. veterans in primary care practices. DESIGN: Historical cohort study of a primary care-based intervention of a BHT from February 2013 to February 2015...
January 1, 2017: Journal of Primary Care & Community Health
https://www.readbyqxmd.com/read/28092768/mercury-levels-in-herring-gulls-and-fish-42-years-of-spatio-temporal-trends-in-the-great-lakes
#15
E Agnes Blukacz-Richards, Ariola Visha, Matthew L Graham, Daryl L McGoldrick, Shane R de Solla, David J Moore, George B Arhonditsis
Total mercury levels in aquatic birds and fish communities have been monitored across the Canadian Great Lakes by Environment and Climate Change Canada (ECCC) for the past 42 years (1974-2015). These data (22 sites) were used to examine spatio-temporal variability of mercury levels in herring gull (Larus argentatus) eggs, lake trout (Salvelinus namaycush), walleye (Sander vitreus), and rainbow smelt (Osmerus mordax). Trends were quantified with dynamic linear models, which provided time-variant rates of change of mercury concentrations...
December 30, 2016: Chemosphere
https://www.readbyqxmd.com/read/28092737/complex-molecular-changes-induced-by-chronic-progestogens-exposure-in-roach-rutilus-rutilus
#16
Gabor Maasz, Zita Zrinyi, Peter Takacs, Sandor Lovas, Istvan Fodor, Tibor Kiss, Zsolt Pirger
In our previous study, we measured 0.23-13.67ng/L progestogens (progesterone, drospirenone, levonorgestrel) in natural waters in the catchment area of the largest shallow lake of Central Europe, Lake Balaton. Progestogen contaminations act as potent steroids with mixed progestagenic, androgenic and mild estrogenic effects that is why our aim was to investigate the morphological and molecular effects of mixture of progesterone, drospirenone, and levonorgestrel in environmentally relevant (10ng/L) and higher (50 and 500ng/L) exposure concentrations in common roach, Rutilus rutilus...
January 13, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28091741/chemical-physical-and-biological-factors-shape-littoral-invertebrate-community-structure-in-coal-mining-end-pit-lakes
#17
Andreas Luek, Joseph B Rasmussen
Aquatic invertebrates form the base of the consumer food web in lakes. In coal-mining end-pit lakes, invertebrates are exposed to an environment with potentially challenging physical and chemical features. We hypothesized that the physical and chemical features of end-pit lakes reduce critical littoral habitat and thus reduce invertebrate diversity, thereby limiting the potential for these lakes to be naturalized. We used a multivariate approach using principle component analysis and redundancy analysis to study relationships between invertebrate community structure, habitat features, and water quality in five end-pit lakes and five natural lakes in the Rocky Mountain foothills of west-central Alberta, Canada...
January 13, 2017: Environmental Management
https://www.readbyqxmd.com/read/28091740/controlling-eutrophication-in-a-mediterranean-shallow-reservoir-by-phosphorus-loading-reduction-the-need-for-an-integrated-management-approach
#18
Mikel Zaragüeta, Pablo Acebes
Increased nutrient enrichment in Mediterranean standing waters has enhanced the risk of being affected by cyanobacterial blooms. Because phosphorus abatement is shaped as a crucial strategy for controlling eutrophication, this study introduces a structural thinking, experiential learning laboratory with animation dynamic model elaborated for Cazalegas Reservoir (Spain) to assess the feasibility of implementing a set of internal and external control measures and hydromorphological adjustments to meet the goal of oligotrophication...
January 13, 2017: Environmental Management
https://www.readbyqxmd.com/read/28089533/bias-and-association-of-sediment-organic-matter-source-apportionment-indicators-a-case-study-in-a-eutrophic-lake-chaohu-china
#19
Fu-Liu Xu, Chen Yang, Wei He, Qi-Shuang He, Yi-Long Li, Lei Kang, Wen-Xiu Liu, Yong-Qiang Xiong, Baoshan Xing
The sources of sediment organic matter (SOM) could be explained by various indicators. To test their biases and associations, the present study determined multiple indicators for SOM source apportionment, including elemental analysis (carbon and nitrogen, and their stable isotope δ(13)C and δ(15)N), n-alkanes compositions as well as derivative indicators (e.g., terrigenous to aquatic ratio), and carbon isotopes of n-alkane in Lake Chaohu, a eutrophic lake. The spatial variation of anthropogenic effects could be revealed by SOM elemental variations...
January 12, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28089530/algae-mediated-removal-of-selected-pharmaceutical-and-personal-care-products-ppcps-from-lake-mead-water
#20
Xuelian Bai, Kumud Acharya
The persistence and fate of pharmaceutical and personal care products (PPCPs) in the Lake Mead ecosystem are particularly important considering the potential ecological risks and human health impacts. This study evaluated the removal of five common PPCPs (i.e., trimethoprim, sulfamethoxazole, carbamazepine, ciprofloxacin, and triclosan) from Lake Mead water mediated by the green alga Nannochloris sp. The results from the incubation studies showed that trimethoprim and carbamazepine were highly resistant to uptake in the algal cultural medium and were measured at approximately 90%-100% of the applied dose after 14days of incubation...
January 12, 2017: Science of the Total Environment
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