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https://www.readbyqxmd.com/read/29166402/early-pleistocene-archaeological-occurrences-at-the-feiliang-site-and-the-archaeology-of-human-origins-in-the-nihewan-basin-north-china
#1
Shuwen Pei, Fei Xie, Chenglong Deng, Zhenxiu Jia, Xiaomin Wang, Ying Guan, Xiaoli Li, Dongdong Ma, Ignacio de la Torre
The Early Pleistocene archaeological evidence from the fluvio-lacustrine sequence of the Nihewan Basin (North China) offers an excellent opportunity to explore early human evolution and behavior in a temperate setting in East Asia, following the earliest 'Out of Africa'. Here we present the first comprehensive study of the Feiliang (FL) site, with emphasis on the archaeological sequence, site integrity, and stone artifact assemblages. Magnetostratigraphic dating results show that early humans occupied the site ca...
2017: PloS One
https://www.readbyqxmd.com/read/29165378/effects-of-sediment-chemical-properties-on-phosphorus-release-rates-in-the-sediment-water-interface-of-the-steppe-wetlands
#2
Jing He, Derong Su, Shihai Lv, Zhaoyan Diao, Jingjie Xie, Yan Luo
Rising temperature causes a process of phosphorus release, which can be characterized well using phosphorus release rates (VP). The objective of the present study was to investigate the major factors affecting sediment phosphorus release rates through a wetland habitat simulation experiment. The results showed that the VP of different wetland sediments were different and changed with the order of W-R (river wetland) > W-L (lake wetland) > W-M (grassy marsh wetland) > W-A (reservoir wetland). The main driving factors which influenced sediment phosphorus flux velocity in the sediment-water interface were sediment B-SO₄(2-), B-MBN and A-MBP content...
November 22, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29164539/amphibian-recovery-after-a-decrease-in-acidic-precipitation
#3
Dag Dolmen, Anders Gravbrøt Finstad, Jon Kristian Skei
We here report the first sign of amphibian recovery after a strong decline due to acidic precipitation over many decades and peaking around 1980-90. In 2010, the pH level of ponds and small lakes in two heavily acidified areas in southwestern Scandinavia (Aust-Agder and Østfold in Norway) had risen significantly at an (arithmetic) average of 0.14 since 1988-89. Parallel with the general rise in pH, amphibians (Rana temporaria, R. arvalis, Bufo bufo, Lissotriton vulgaris, and Triturus cristatus) had become significantly more common: the frequency of amphibian localities rose from 33% to 49% (n = 115), and the average number of amphibian species per locality had risen from 0...
November 21, 2017: Ambio
https://www.readbyqxmd.com/read/29164468/assessment-of-water-resource-contamination-by-pesticides-in-vegetable-producing-areas-in-burkina-faso
#4
Edouard Lehmann, Morgan Fargues, Jean-Jacques Nfon Dibié, Yacouba Konaté, Luiz Felippe de Alencastro
This study proposes a comprehensive approach to investigate water resource contamination by pesticides under the specific climatic and hydrological conditions of the Sudano-Sahelian climate. Samples were collected from traditional wells, boreholes, and a lake in Burkina Faso. A multiresidue analysis was developed for 25 pesticides identified during field surveys. Polar organic chemical integrative samplers (POCIS) were used to confirm trends observed with grab samples. Uptake kinetics of POCIS were assessed by in situ calibration...
November 21, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29164331/kairomones-from-an-estuarine-fish-increase-visual-sensitivity-in-brine-shrimp-artemia-franciscana-from-great-salt-lake-utah-usa
#5
Corie L Charpentier, Jonathan H Cohen
Chemical cues from fish, or kairomones, often impact the behavior of zooplankton. These behavioral changes are thought to improve predator avoidance. For example, marine and estuarine crustacean zooplankton become more sensitive to light after kairomone exposure, which likely deepens their vertical distribution into darker waters during the day and thereby reduces their visibility to fish predators. Here, we show that kairomones from an estuarine fish induce similar behavioral responses in adult brine shrimp (Artemia franciscana) from an endorheic, hypersaline lake, Great Salt Lake, Utah, USA...
November 21, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29164278/metals-and-organohalogen-contaminants-in-bald-eagles-haliaeetus-leucocephalus-from-ontario-1991-2008
#6
P A Martin, K D Hughes, G D Campbell, J L Shutt
We examined the degree of exposure of lead (Pb), mercury (Hg), and several organohalogen contaminants and its potential impact on survival of bald eagles in Ontario from 1991 to 2008. Overall, results for 43 dead or dying bald eagles collected in the province indicate that 23% (10/43) of birds died of Pb poisoning and 9% (4/43) died of suspected Hg poisoning. Pb poisoning was diagnosed based on exceedances of toxicity thresholds in liver and kidney and supported by clinical observations, necropsy results, and histology findings when available...
November 21, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/29162815/organic-carbon-burial-in-global-lakes-and-reservoirs
#7
Raquel Mendonça, Roger A Müller, David Clow, Charles Verpoorter, Peter Raymond, Lars J Tranvik, Sebastian Sobek
Burial in sediments removes organic carbon (OC) from the short-term biosphere-atmosphere carbon (C) cycle, and therefore prevents greenhouse gas production in natural systems. Although OC burial in lakes and reservoirs is faster than in the ocean, the magnitude of inland water OC burial is not well constrained. Here we generate the first global-scale and regionally resolved estimate of modern OC burial in lakes and reservoirs, deriving from a comprehensive compilation of literature data. We coupled statistical models to inland water area inventories to estimate a yearly OC burial of 0...
November 22, 2017: Nature Communications
https://www.readbyqxmd.com/read/29162809/full-scale-evaluation-of-methane-production-under-oxic-conditions-in-a-mesotrophic-lake
#8
D Donis, S Flury, A Stöckli, J E Spangenberg, D Vachon, D F McGinnis
Oxic lake surface waters are frequently oversaturated with methane (CH4). The contribution to the global CH4 cycle is significant, thus leading to an increasing number of studies and stimulating debates. Here we show, using a mass balance, on a temperate, mesotrophic lake, that ~90% of CH4 emissions to the atmosphere is due to CH4 produced within the oxic surface mixed layer (SML) during the stratified period, while the often observed CH4 maximum at the thermocline represents only a physically driven accumulation...
November 21, 2017: Nature Communications
https://www.readbyqxmd.com/read/29162201/flavobacterium-lacunae-sp-nov-isolated-from-a-freshwater-pond
#9
Wen-Ming Chen, Ching-Ling Su, Shih-Yi Sheu
A novel bacterial strain AHQ-46(T) was isolated from a freshwater lake in Taiwan. The strain was Gram-stain-negative, strictly aerobic, motile by gliding, rod-shaped and formed translucent yellow colonies. Optimal growth occurred at 20-25 °C, pH 7.0, and in the absence of NaCl. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain AHQ-46(T) belonged to the genus Flavobacterium and was most closely related to Flavobacterium verecundum TTM-46(T) with a sequence similarity of 95.8 %. Strain AHQ-46(T) contained iso-C15 : 1 G, iso-C15 : 0, summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c) and iso-C17 : 0 3-OH as the predominant fatty acids...
April 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29162144/schistosoma-mansoni-and-other-helminthes-infections-at-haike-primary-school-children-north-east-ethiopia-a-cross-sectional-study
#10
Daniel Getacher Feleke, Solomon Arega, Mulien Tekleweini, Kegnitu Kindie, Alemu Gedefie
OBJECTIVES: Schistosomiasis and soil-transmitted helminthes infections are among the widely distributed infections worldwide. In Ethiopia, parasitic helminthic infections and schistosomiasis are among the most predominant causes of outpatient morbidity. Hence there is still lack of epidemiological information in North-Eastern Ethiopia, this study aimed to determine the prevalence and associated factors of Schistosoma mansoni and other helminthes infections at Haike primary school children, Haike, North-East Ethiopia...
November 21, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29161861/a-mathematical-model-for-the-seasonal-transmission-of-schistosomiasis-in-the-lake-and-marshland-regions-of-china
#11
Yingke Li, Zhidong Teng, Shigui Ruan, Mingtao Li, Xiaomei Feng
Schistosomiasis, a parasitic disease caused by \textit{ Schistosoma Japonicum}, is still one of the most serious parasitic diseases in China and remains endemic in seven provinces, including Hubei, Anhui, Hunan, Jiangsu, Jiangxi, Sichuan, and Yunnan. The monthly data of human schistosomiasis cases in Hubei, Hunan, and Anhui provinces (lake and marshland regions) released by the Chinese Center for Disease Control and Prevention (China CDC) display a periodic pattern with more cases in late summer and early autumn...
October 2017: Mathematical Biosciences and Engineering: MBE
https://www.readbyqxmd.com/read/29161774/building-trophic-specializations-that-result-in-substantial-niche-partitioning-within-a-young-adaptive-radiation
#12
Luz Patricia Hernandez, Dominique Adriaens, Christopher H Martin, Peter C Wainwright, Bert Masschaele, Manuel Dierick
Dietary partitioning often accompanies the increased morphological diversity seen during adaptive radiations within aquatic systems. While such niche partitioning would be expected in older radiations, it is unclear how significant morphological divergence occurs within a shorter time period. Here we show how differential growth in key elements of the feeding mechanism can bring about pronounced functional differences among closely related species. An incredibly young adaptive radiation of three Cyprinodon species residing within hypersaline lakes in San Salvador Island, Bahamas, has recently been described...
November 21, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29161604/ecological-effects-and-potential-risks-of-the-water-diversion-project-in-the-heihe-river-basin
#13
Mengmeng Zhang, Shuai Wang, Bojie Fu, Guangyao Gao, Qin Shen
To curb the severe ecological deterioration in the lower Heihe River Basin (HRB) in northwest China, a water diversion project was initiated in 2000. A comprehensive analysis of the ecological effects and potential risks associated with the project is needed. We assessed the hydrological and ecological achievements, and also analyzed the potential problems after the project was completed. We found that since the project began the hydrological regime has changed, with more than 57.82% of the upstream water being discharged to the lower reaches on average...
November 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29161512/trophodynamics-of-organic-pollutants-in-pelagic-and-benthic-food-webs-of-lake-dianchi-importance-of-ingested-sediment-as-uptake-route
#14
Senrong Fan, Beili Wang, Hang Liu, Shixiong Gao, Tong Li, Shuran Wang, Yong Liu, Xueqin Liu, Yi Wan
Habitat is of great importance in determining the trophic transfer of pollutants in freshwater ecosystems; however, the major factors influencing chemical trophodynamics in pelagic and benthic food webs remain unclear. This study investigated the levels of p,p'-dichlorodiphenyldichloroethylene (p,p'-DDE), polycyclic aromatic hydrocarbons (PAHs), and substituted PAHs (s-PAHs) in two plankton species, six invertebrate species, and ten fish species collected from Lake Dianchi in southern China. Relatively high concentrations of PAHs and s-PAHs were detected with total concentrations of 11...
November 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29161280/microbial-caddisfly-bioherm-association-from-the-lower-cretaceous-shinekhudag-formation-mongolia-earliest-record-of-plant-armoring-in-fossil-caddisfly-cases
#15
Tsolmon Adiya, Cari L Johnson, Mark A Loewen, Kathleen A Ritterbush, Kurt N Constenius, Cory M Dinter
Caddisfly larvae construct underwater protective cases using surrounding materials, thus providing information on environmental conditions in both modern and ancient systems. Microbial bioherms associated with caddisfly cases are found in the Berriassian-Hauterivian (~140-130 Ma) Shinekhudag Formation of Mongolia, and yield new insights into aspects of lacustrine paleoecosystems and paleoenvironments. This formation contains the earliest record of plant-armored caddisfly cases and a rare occurrence of microbial-caddisfly association from the Mesozoic...
2017: PloS One
https://www.readbyqxmd.com/read/29161037/biodegradation-of-carbon-nanotube-polymer-nanocomposites-using-a-monoculture
#16
David G Goodwin, Iruhany Boyer, Thomas Devahif, Cong Gao, Benjamin Frank, Xier Lu, Leo Kuwama, Tucker B Gordon, JingJing Wang, James F Ranville, Edward J Bouwer, D Howard Fairbrother
The biodegradation rates of carbon nanotube (CNT)/ polymer nanocomposites (PNCs) containing poly-ɛ-caprolactone (PCL) were investigated using Pseudomonas aeruginosa, a microorganism commonly found in the environment. CNT/PCL nanocomposite mass loss profiles revealed that the rate of PCL matrix biodegradation decreased systematically as the CNT loading increased from 0.1 to 10% w/w. Addition of even a low CNT loading (< 1% w/w) caused the CNT/PCL biodegradation rate constant to decrease by more than 50%...
November 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/29160223/hematology-and-condition-factor-of-tui-chub-and-fathead-minnow-parasitized-by-nematode-from-upper-klamath-lake-oregon-usa
#17
Maurício L Martins, Marcos Tavares-Dias, Andrew J Janik, Michael L Kent, Gabriela T Jerônimo
This study evaluated the hematological profile and condition factor (Kn) of tui chub Siphateles bicolor and fathead minnow Pimephales promelas and their associations with larvae of Contracaecum sp. infection of the heart. A total of 30 tui chub and 17 fathead minnow were collected from Upper Klamath Lake, Oregon, USA, measured, and weighed and blood was drawn for hematological analysis. Nematode larvae parasitized tui chub with a prevalence of 50% and mean intensity of 1.40, while 11.8% of fathead minnow were parasitized at a mean intensity of 1...
November 21, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/29160219/complete-sequences-of-4-viral-hemorrhagic-septicemia-virus-ivb-isolates-and-their-virulence-in-northern-pike-fry
#18
Rodman G Getchell, Emily R Cornwell, Steven Bogdanowicz, Jose Andrés, William N Batts, Gael Kurath, Rachel Breyta, Joanna G Choi, John M Farrell, Paul R Bowser
Four viral hemorrhagic septicemia virus (VHSV) genotype IVb isolates were sequenced, their genetic variation explored, and comparative virulence assayed with experimental infections of northern pike Esox lucius fry. In addition to the type strain MI03, the complete 11183 bp genome of the first round goby Neogobius melanostomus isolate from the St. Lawrence River, and the 2013 and 2014 isolates from gizzard shad Dorosoma cepedianum die-offs in Irondequoit Bay, Lake Ontario and Dunkirk Harbor, Lake Erie were all deep sequenced on an Illumina platform...
November 21, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/29159482/characterizing-the-breadth-and-depth-of-volunteer-water-monitoring-programs-in-the-united-states
#19
Kristine F Stepenuck, Kenneth D Genskow
A survey of 345 volunteer water monitoring programs in the United States was conducted to document their characteristics, and perceived level of support for data to inform natural resource management or policy decisions. The response rate of 86% provided information from 46 states. Programs represented a range of ages, budgets, objectives, scopes, and level of quality assurance, which influenced data uses and perceived support by sponsoring agency administrators and external decision makers. Most programs focused on rivers, streams, and lakes...
November 20, 2017: Environmental Management
https://www.readbyqxmd.com/read/29159209/dynamics-of-pulicat-lake-mouth-analysis-using-geospatial-data-east-coast-of-india-implications-to-socio-economic-scenarios
#20
K Nagalaksmi, Madri Pramod Kumar, N Jayaraju, T Lakshmi Prasad, B Lakshmanna, G Sreenivasulu
Pulicat Lake is one of the major wetlands in India. It is the second largest brackish water lagoon in India next to Chilika Lake in Orissa state. Pulicat Lake sits beside the Bay of Bengal so, the study on the mouth is vital. The investigations were carried out by using multi-temporal satellite imageries of IRS P6, LISS III data for four years viz., 2009, 2011, 2012 and 2013. Subsequent changes in the width of the lake at the southern side were measured. It is found that the lake mouth is not static but dynamic predominantly fluctuating year by year...
December 2017: Data in Brief
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