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Nianjie Shang, Qiaoqiao Zhu, Meixue Dai, Guoyan Zhao
The first complete genome sequence of a recently described Salinicola tamaricis species was determined for the strain F01T (=CCTCC AB 2015304T =KCTC 42855T ). The strain was isolated from the leaves of wetland plant Tamarix chinensis Lour and shows a high tolerance to heavy metals, such as manganese, nickel, lead, and copper ions.
April 19, 2018: Genome Announcements
Zhao Lyu, Jingbao Li, Shuyan Qi, Yuhe Yu, Chen Shao
The living morphology, infraciliature and morphogenetic events of a new soil urostylid ciliate, Australothrix xianiensis nov. spec., collected from Chanba National Wetland Park in Xi'an, China, were studied in vivo and after protargol preparation. Australothrix xianiensis nov. spec. is characterized as follows: about 190-240 × 40-60 μm in life; body pisciform and dark; cortical granules arranged in longitudinal rows on both sides, colourless, rod-shaped and about 2 × 1 μm in size; single contractile vacuole slightly ahead of mid-body with two long collecting canals; macronuclear nodules scattered throughout cytoplasm; adoral zone occupies about 20% of body length, composed of about 32 membranelles; three frontal cirri and one buccal cirrus; two to four midventral pairs and four or five midventral rows, one left and two right marginal rows; four or five dorsal kineties; four or five caudal cirri...
April 5, 2018: European Journal of Protistology
Cem Senduran, Kemal Gunes, Duygu Topaloglu, Omer Hulusi Dede, Fabio Masi, Ozen Arli Kucukosmanoglu
This study performed in Sapanca Lake catchment area, used as a drinking water resource. Two highways located at northern and southern shores, and a railway at its south are significant sources of pollution. As a possible solution for protecting water quality a pocket wetland constructed and operated. Performances statistically interpreted by Spearman's Correlation test and univariate analysis of variance on collected data. The mean removal efficiencies obtaited were 52% (TSS), 4% (Nitrate), 26% (TN), -5% (TOC), 63% (TP), 4...
April 3, 2018: Chemosphere
Verónica Molina, Cristina Dorador, Camila Fernández, Laura Bristow, Yoanna Eissler, Martha Hengst, Klaudia Hernandez, Lasse Mork Olsen, Chris Harrod, Francisca Marchant, Cristobal Anguita, Marcela Cornejo
High altitude wetland holds freshwater springs, evaporitic ponds and lagoon with variable salinity and nutrients, potentially influencing the ecology of nitrifying communities. In this study, nitrifying microorganisms in Salar de Huasco (Chile) were surveyed to determine bacterial and archaeal contribution to ammonium (AO), nitrite oxidation (NO), ammonium uptake (AU) during wet and dry seasons. The activity signals from these group were assessed by specific amoA-qPCR transcription, 15N tracer studies and addition of group specific inhibitor experiments for nitrifying microorganisms (N1-guanyl-1, 7-diaminoheptane [GC7]-archaeal specific and allylthiourea [ATU]-bacterial specific)...
April 12, 2018: FEMS Microbiology Ecology
Paul J Morris, Graeme T Swindles, Paul J Valdes, Ruza F Ivanovic, Lauren J Gregoire, Mark W Smith, Lev Tarasov, Alan M Haywood, Karen L Bacon
Widespread establishment of peatlands since the Last Glacial Maximum represents the activation of a globally important carbon sink, but the drivers of peat initiation are unclear. The role of climate in peat initiation is particularly poorly understood. We used a general circulation model to simulate local changes in climate during the initiation of 1,097 peatlands around the world. We find that peat initiation in deglaciated landscapes in both hemispheres was driven primarily by warming growing seasons, likely through enhanced plant productivity, rather than by any increase in effective precipitation...
April 16, 2018: Proceedings of the National Academy of Sciences of the United States of America
Takashi S T Tanaka, Chagan Irbis, Yuki Hama, Pengyun Wang, Kunzhi Li, Tatsuya Inamura
Emergent aquatic macrophytes play an important role in the removal of nutrients in constructed wetlands (CWs). However, plant biomass supplies litter after the onset of senescence. Although litter-derived nitrogen (N) has been considered a nutrient source for the internal loading that may reduce CW performance, little is known about the quantitative N dynamics associated with litter decomposition. Thus, a controversial question remains about whether plant harvest is needed to manage CWs. In this study, we evaluated the decomposition and the fate of N derived from 15 N-labeled Phragmites litter in a CW for 1 year...
April 14, 2018: Journal of Environmental Management
Steven D Melvin, Frederic D L Leusch, Anthony R Carroll
Amphibians use wetlands in urban and agricultural landscapes for breeding, growth and development. Fungicides and other pesticides used in these areas have therefore been identified as potential threats that could contribute towards amphibian population declines. However, relatively little is known about how such chemicals influence sensitive early life-stages or how short episodic exposures influence sub-lethal physiological and metabolic pathways. The present study applied untargeted metabolomics to evaluate effects in early post-hatch amphibian larvae exposed to the anti-androgenic fungicides vinclozolin and propiconazole...
April 11, 2018: Aquatic Toxicology
Yan Gao, Wen Zhang, Bin Gao, Wen Jia, Aijun Miao, Lin Xiao, Liuyan Yang
Electrolysis combined with biochar (BC) was used in a constructed wetland to intensify nitrogen (N) and phosphorus (P) removal from wastewater simultaneously. A pilot study was conducted using an electrolysis-integrated, BC-amended, horizontal, subsurface-flow, constructed wetland (E-BHFCW). The research results showed that both electrolysis and BC substrate played important roles in the intensified, constructed wetland. The electrolysis combined BC substrate greatly enhanced the removal rates of nitrate (49...
April 4, 2018: Water Research
Qingfeng Chen, Beibei Guo, Changsheng Zhao, Baoxiu Xing
Due to the severe degradation and environmental pollution of coastal wetlands by human activities, they have gradually become an important source of greenhouse gases (GHGs) emissions, so exploring the characteristics of their emission is important to reduce greenhouse gas emissions from coastal wetlands. In this study, the dynamics of methane (CH4 ) and carbon dioxide (CO2 ) emissions were investigated in five kinds of typical tidal flats from the Yellow River delta wetland during the years 2011-2013, and the influences of water level and salinity on their emissions were explored in laboratory experiments...
April 13, 2018: Environmental Pollution
Wen Chen, Eldridge S Adams
The Eurasian ant Myrmica rubra (L.) (Hymenoptera: Formicidae) was first discovered in North America in the early 1900s in Massachusetts. Populations have since appeared in at least seven states within the United States and in seven Canadian provinces. We conducted a systematic search for the ant across southern New England-the states of Connecticut, Massachusetts, and Rhode Island-where M. rubra is spreading from multiple loci. The species occurs in two large regions in Massachusetts, each spanning approximately 75 km, and in several smaller populations in Massachusetts and Rhode Island...
April 5, 2018: Environmental Entomology
C M Monteiro, E W Wendt, Y D Zebral
A new species of Dendrorchis is described and compared with others in the genus. The parasites were found in the swim bladder of the annual killifish Cynopoecilus melanotaenia. Hosts were collected from a seasonal wetland in southern Brazil. The main characteristics of D. pampae are: genital pore in the intestinal bifurcation region elongate and lobed vitellaria uterine loops limited to the acetabular region and to the rear end of the body; and wide intestinal caeca. An emended diagnosis of the genus Dendrorchis includes the characteristics of the new species...
April 15, 2018: Journal of Helminthology
P S J Minderhoud, L Coumou, L E Erban, H Middelkoop, E Stouthamer, E A Addink
The Vietnamese Mekong delta is subsiding due to a combination of natural and human-induced causes. Over the past several decades, large-scale anthropogenic land-use changes have taken place as a result of increased agricultural production, population growth and urbanization in the delta. Land-use changes can alter the hydrological system or increase loading of the delta surface, amplifying natural subsidence processes or creating new anthropogenic subsidence. The relationships between land use histories and current rates of land subsidence have so far not been studied in the Mekong delta...
April 9, 2018: Science of the Total Environment
Miguel Ángel Lominchar, María José Sierra, María Jiménez-Moreno, María Guirado, Rosa Carmen Rodríguez Martín-Doimeadios, Rocío Millán
Monomethylmercury (MeHg) is one of the most toxic and the most commonly occurring organomercury compound and the wetlands are one of the main areas of generation of this Hg form. Concretely, it is in the macrophyte root system where better conditions are given for its generation. However, the knowledge of absorption and subsequent distribution of mercury (Hg) and monomethylmercury in aquatic plants is still limited. Mercury mining district such as Almadén (Ciudad Real, Spain) is a natural laboratory where different rivers flow and the species Typha domingensis Pers...
April 11, 2018: Environmental Science and Pollution Research International
Grace Pounsin, Nur Syahirah Wahab, Azuan Roslan, Muhamad Aidil Zahidin, Elizabeth Pesiu, Nur Aida Md Tamrin, M T Abdullah
A study of the bat diversity was conducted in Hulu Terengganu dipterocarp forest and Setiu Wetland Beach Ridges Interspersed with Swales (BRIS) forest in Terengganu, to study the species diversity, composition and stratification of fruit bats from the understorey to the forest canopy. Mist nets were set up at the understorey, sub-canopy and canopy layer while harp traps were set up at the understorey layer. We recorded 170 individuals from six families' compromised 21 species from Hulu Terengganu dipterocarp forests and four species from Setiu Wetland BRIS forests throughout the sampling period...
March 2018: Tropical Life Sciences Research
Emily M Bock, Brady S L Coleman, Zachary M Easton
Denitrifying bioreactors are recently-established agricultural best management practices with growing acceptance in the US Midwest but less studied in other agriculturally significant regions, such as the US Mid-Atlantic. A bioreactor was installed in the Virginia Coastal Plain to evaluate performance in this geographically novel region facing challenges managing nutrient pollution. The 25.3 m3 woodchip bed amended with 10% biochar (v/v) intercepted subsurface drainage from 6.5 ha cultivated in soy. Influent and effluent nitrate-nitrogen (NO3 -N) and total phosphorus (TP) concentrations and flowrate were monitored intensively during the second year of operation...
April 5, 2018: Journal of Environmental Management
Yan Yang, Yaqian Zhao, Ranbin Liu, David Morgan
Substrate selection is one of the key technical issues for constructed wetlands (CWs), which works for wastewater treatment based mainly on the biofilm principle. In recent years, many alternative substrates have been studied and applied in CWs, and a review is conducive to providing updated information on CW R&D. Based on the intensive research work especially over the last 10 years on the development of emerged substrates (except for the three conventional substrates of soil, sand, and gravel) in CWs, this review was made...
March 29, 2018: Bioresource Technology
Jianfeng Ye, Zuxin Xu, Hao Chen, Liang Wang, Gaboury Benoit
Introducing of earthworms to constructed wetlands (CWs) has been considered as a new approach to solve the clogging problems in the long-established systems. Despite its potential advantage, the correlational researches are still in the stage of preliminary observation and speculation. This paper presents a comprehensive and in-depth research about the positive effects of earthworms (Eisenia foetida) on clog matter (CM) reduction through different pathways, including in vivo metabolism and uptake, conversion, transport, and promotion of microorganism quantities...
April 4, 2018: Environmental Pollution
Verónica Molina, Yoanna Eissler, Marcela Cornejo, Pierre E Galand, Cristina Dorador, Martha Hengst, Camila Fernandez, Jean Pierre Francois
Northern Chile harbors different bioclimatic zones including hyper-arid and arid ecosystems and hotspots of microbial life, such as high altitude wetlands, which may contribute differentially to greenhouse gases (GHG) such as carbon dioxide (CO2 ), methane (CH4 ) and nitrous oxide (N2 O). In this study, we explored ground level GHG distribution and the potential role of a wetland situated at 3800 m.a.s.l, and characterized by high solar radiation < 1600 W m-2 , extreme temperature ranges (-12 to 24 °C) and wind stress (< 17 m s-1 )...
April 6, 2018: Antonie Van Leeuwenhoek
Pengfei Wu, Hongzhi Zhang, Liwei Cui, Kyle Wickings, Shenglei Fu, Changting Wang
A correction to this article has been published and is linked from the HTML and PDF versions of this paper. The error has not been fixed in the paper.
April 5, 2018: Scientific Reports
Ajcharapa Chuanchai, Rameshprabu Ramaraj
Biomass from wetland aquatic grass and buffalo grass can be exploited for biogas production, because this substrate is plenteous and does not compete with food production. In this study, the grass substrate was physically pretreated by boiling with different retention time to increase its biodegradability and was examined in batch mode. Boiling pretreatment suggested that 100 °C with 2 h retention time was the best condition. The results showed that the optimum grass concentration in the 1:1 ratio of co-digestion mixture with manure produced the highest methane yield...
March 2018: 3 Biotech
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