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https://www.readbyqxmd.com/read/28640819/the-importance-of-data-quality-for-generating-reliable-distribution-models-for-rare-elusive-and-cryptic-species
#1
Keith B Aubry, Catherine M Raley, Kevin S McKelvey
The availability of spatially referenced environmental data and species occurrence records in online databases enable practitioners to easily generate species distribution models (SDMs) for a broad array of taxa. Such databases often include occurrence records of unknown reliability, yet little information is available on the influence of data quality on SDMs generated for rare, elusive, and cryptic species that are prone to misidentification in the field. We investigated this question for the fisher (Pekania pennanti), a forest carnivore of conservation concern in the Pacific States that is often confused with the more common Pacific marten (Martes caurina)...
2017: PloS One
https://www.readbyqxmd.com/read/28640606/pharmacokinetics-of-mequindox-and-its-marker-residue-1-4-bisdesoxymequindox-in-swine-following-multiple-oral-gavage-and-intramuscular-administration-an-experimental-study-coupled-with-population-physiologically-based-pharmacokinetic-modeling
#2
Dongping Zeng, Zhoumeng Lin, Binghu Fang, Miao Li, Ronette Gehring, Jim E Riviere, ZhenLing Zeng
Mequindox (MEQ) is a quinoxaline-N,N-dioxide antibiotic used in food-producing animals. MEQ residue in animal-derived foods is a food safety concern. The tissue distribution of MEQ and its marker residue 1,4-bisdesoxymequindox (M1) was determined in swine following oral gavage or intramuscular injection twice daily for 3 days. The experimental data were used to construct a flow-limited physiologically based pharmacokinetic (PBPK) model. The model predictions correlated with available data well. Monte Carlo analysis showed that the times needed for M1 concentrations to fall below limit of detection (5 µg/kg) in liver for the 99th percentile of the population were 27 and 34 days after oral gavage and intramuscular administration twice daily for 3 days, respectively...
June 22, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28636817/framework-for-optimizing-selection-of-interspecies-correlation-estimation-models-to-address-species-diversity-and-toxicity-gaps-in-an-aquatic-database
#3
Adriana C Bejarano, Sandy Raimondo, Mace G Barron
The Chemical Aquatic Fate and Effects (CAFE) database is a tool that facilitates assessments of accidental chemical releases into aquatic environments. CAFE contains aquatic toxicity data used in the development of species sensitivity distributions (SSDs) and the estimation of hazard concentrations (HCs). For many chemicals, gaps in species diversity and toxicity data limit the development of SSDs, which may be filled with Interspecies Correlation Estimation (ICE) models. Optimization of ICE model selection and integration ICE-predicted values into CAFE required a multistep process that involved the use of different types of data to assess their influence on SSDs and HC estimates...
June 21, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28636615/family-living-sets-the-stage-for-cooperative-breeding-and-ecological-resilience-in-birds
#4
Michael Griesser, Szymon M Drobniak, Shinichi Nakagawa, Carlos A Botero
Cooperative breeding is an extreme form of cooperation that evolved in a range of lineages, including arthropods, fish, birds, and mammals. Although cooperative breeding in birds is widespread and well-studied, the conditions that favored its evolution are still unclear. Based on phylogenetic comparative analyses on 3,005 bird species, we demonstrate here that family living acted as an essential stepping stone in the evolution of cooperative breeding in the vast majority of species. First, families formed by prolonging parent-offspring associations beyond nutritional independency, and second, retained offspring began helping at the nest...
June 2017: PLoS Biology
https://www.readbyqxmd.com/read/28634332/predicting-the-potential-risk-area-of-illegal-vaccine-trade-in-china
#5
Yilan Liao, Yanhui Lei, Zhoupeng Ren, Huiyan Chen, Dongyue Li
Since the disclosure of the "Illegal vaccine operation series case in Jinan, Shandong" in March, 2016, this issue has attracted a great deal of attention and has led to public concerns about the safety and efficacy of the vaccines involved in this case. The main purpose of this paper is to scientifically and scrupulously predict the possible geographic distribution of illegal vaccines in China, and provide a foundation to guide future governmental policies and actions. A species distribution model was used because of the advantages of using presence/pseudo-absence or presence-only data, and it performs well with incomplete species distribution data...
June 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28632790/diversity-structure-of-culturable-bacteria-isolated-from-the-fildes-peninsula-king-george-island-antarctica-a-phylogenetic-analysis-perspective
#6
Gerardo González-Rocha, Gabriel Muñoz-Cartes, Cristian B Canales-Aguirre, Celia A Lima, Mariana Domínguez-Yévenes, Helia Bello-Toledo, Cristián E Hernández
It has been proposed that Antarctic environments select microorganisms with unique biochemical adaptations, based on the tenet 'Everything is everywhere, but, the environment selects' by Baas-Becking. However, this is a hypothesis that has not been extensively evaluated. This study evaluated the fundamental prediction contained in this hypothesis-in the sense that species are structured in the landscape according to their local habitats-, using as study model the phylogenetic diversity of the culturable bacteria of Fildes Peninsula (King George Island, Antarctica)...
2017: PloS One
https://www.readbyqxmd.com/read/28632236/merraclim-a-high-resolution-global-dataset-of-remotely-sensed-bioclimatic-variables-for-ecological-modelling
#7
Greta C Vega, Luis R Pertierra, Miguel Ángel Olalla-Tárraga
Species Distribution Models (SDMs) combine information on the geographic occurrence of species with environmental layers to estimate distributional ranges and have been extensively implemented to answer a wide array of applied ecological questions. Unfortunately, most global datasets available to parameterize SDMs consist of spatially interpolated climate surfaces obtained from ground weather station data and have omitted the Antarctic continent, a landmass covering c. 20% of the Southern Hemisphere and increasingly showing biological effects of global change...
June 20, 2017: Scientific Data
https://www.readbyqxmd.com/read/28630801/characterization-of-the-transcriptome-and-est-ssr-development-in-boea-clarkeana-a-desiccation-tolerant-plant-endemic-to-china
#8
Ying Wang, Kun Liu, De Bi, Shoubiao Zhou, Jianwen Shao
BACKGROUND: Desiccation-tolerant (DT) plants can recover full metabolic competence upon rehydration after losing most of their cellular water (>95%) for extended periods of time. Functional genomic approaches such as transcriptome sequencing can help us understand how DT plants survive and respond to dehydration, which has great significance for plant biology and improving the drought tolerance of crops. Boea clarkeana Hemsl. (Gesneriaceae) is a DT dicotyledonous herb. Its genomic sequences characteristics remain unknown...
2017: PeerJ
https://www.readbyqxmd.com/read/28630712/quantifying-drivers-of-wild-pig-movement-across-multiple-spatial-and-temporal-scales
#9
Shannon L Kay, Justin W Fischer, Andrew J Monaghan, James C Beasley, Raoul Boughton, Tyler A Campbell, Susan M Cooper, Stephen S Ditchkoff, Steve B Hartley, John C Kilgo, Samantha M Wisely, A Christy Wyckoff, Kurt C VerCauteren, Kim M Pepin
BACKGROUND: The movement behavior of an animal is determined by extrinsic and intrinsic factors that operate at multiple spatio-temporal scales, yet much of our knowledge of animal movement comes from studies that examine only one or two scales concurrently. Understanding the drivers of animal movement across multiple scales is crucial for understanding the fundamentals of movement ecology, predicting changes in distribution, describing disease dynamics, and identifying efficient methods of wildlife conservation and management...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28626788/a-high-resolution-shapefile-of-the-andean-biogeographical-region
#10
Gonzalo Matias Romano
Biogeographical analyses have proven to be an efficient complement to classic ecology. An ecoregional layer based on Morrone understanding of the Andean region and its sub-regions was constructed. This high-resolution layer was generated with GIS software, and it enables to include ecoregions as categorical variables into species distribution modeling software.
August 2017: Data in Brief
https://www.readbyqxmd.com/read/28623829/criteria-for-assessing-the-ecological-risk-of-nonylphenol-for-aquatic-life-in-chinese-surface-fresh-water
#11
Liangmao Zhang, Caidi Wei, Hui Zhang, Mingwei Song
The typical environmental endocrine disruptor nonylphenol is becoming an increasingly common pollutant in both fresh and salt water; it compromises the growth and development of many aquatic organisms. As yet, water quality criteria with respect to nonylphenol pollution have not been established in China. Here, the predicted "no effect concentration" of nonylphenol was derived from an analysis of species sensitivity distribution covering a range of species mainly native to China, as a means of quantifying the ecological risk of nonylphenol in surface fresh water...
June 9, 2017: Chemosphere
https://www.readbyqxmd.com/read/28622582/porous-mn-doped-g-c3n4-photocatalysts-for-enhanced-synergetic-degradation-under-visible-light-illumination
#12
Ji-Chao Wang, Cheng-Xing Cui, Ying Li, Lu Liu, Yu-Ping Zhang, Weina Shi
Photocatalytic degradation by semiconductors is an ideal way to solve the environmental problem. Here, the porous Mn doped g-C3N4 photocatalyst was synthesized by the calcination-refluxing method. The as-prepared g-C3N4 exhibits the high activity of photocatalytic degradation under visible light irradiation ( > 400nm) in the mixed system of Cr(VI) and organic pollutants. Especially, the photocatalytic activity of Cr(VI) reduction was increased from 9.5% to 76.5%, while that of Rhodamine B(RhB) degradation was enhanced from 15...
June 8, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28620395/genome-wide-identification-of-glyoxalase-genes-in-medicago-truncatula-and-their-expression-profiling-in-response-to-various-developmental-and-environmental-stimuli
#13
Ajit Ghosh
Glyoxalase is an evolutionary highly conserved pathway present in all organisms. Conventional glyoxalase pathway has two enzymes, glyoxalase I (GLYI) and glyoxalase II (GLYII) that act sequentially to detoxify a highly cytotoxic compound methylglyoxal (MG) to D-lactate with the help of reduced glutathione. Recently, proteins with DJ-1/PfpI domain have been reported to perform the same conversion in a single step without the help of any cofactor and thus termed as "unique glyoxalase III" enzyme. Genome-wide analysis of glyoxalase genes have been previously conducted in Arabidopsis, rice and Soybean plants, but no such study was performed for one of the agricultural important model legume species, Medicago truncatula...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28620034/structural-insights-into-the-alternative-oxidases-are-all-oxidases-made-equal
#14
REVIEW
Benjamin May, Luke Young, Anthony L Moore
The alternative oxidases (AOXs) are ubiquinol-oxidoreductases that are members of the diiron carboxylate superfamily. They are not only ubiquitously distributed within the plant kingdom but also found in increasing numbers within the fungal, protist, animal and prokaryotic kingdoms. Although functions of AOXs are highly diverse in general, they tend to play key roles in thermogenesis, stress tolerance (through the management of radical oxygen species) and the maintenance of mitochondrial and cellular energy homeostasis...
June 15, 2017: Biochemical Society Transactions
https://www.readbyqxmd.com/read/28619730/consumption-of-a-high-iron-diet-disrupts-homeostatic-regulation-of-intestinal-copper-absorption-in-adolescent-mice
#15
Jung-Heun Ha, Caglar Doguer, James F Collins
High-iron feeding of rodents has been commonly used to model human iron-overload disorders. We recently noted that high-iron consumption impaired growth and caused severe systemic copper deficiency in growing rats, but the mechanism by which this occurred could not be determined due to technical limitations. In the current investigation, we thus utilized mice; first to determine if the same phenomenon occurred in another mammalian species, and secondly since we could assess in vivo copper absorption in mice...
June 15, 2017: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/28617631/sixty-five-million-years-of-change-in-temperature-and-topography-explain-evolutionary-history-in-eastern-north-american-plethodontid-salamanders
#16
Richard Barnes, Adam Thomas Clark
For many taxa and systems, species richness peaks at midelevations. One potential explanation for this pattern is that large-scale changes in climate and geography have, over evolutionary time, selected for traits that are favored under conditions found in contemporary midelevation regions. To test this hypothesis, we use records of historical temperature and topographic changes over the past 65 Myr to construct a general simulation model of plethodontid salamander evolution in eastern North America. We then explore possible mechanisms constraining species to midelevation bands by using the model to predict plethodontid evolutionary history and contemporary geographic distributions...
July 2017: American Naturalist
https://www.readbyqxmd.com/read/28616991/an-assessment-of-the-effects-of-anisotropic-interactions-among-hydrogen-molecules-and-their-isotopologues-a-diffusion-monte-carlo-investigation-of-gas-phase-and-adsorbed-clusters
#17
Massimo Mella, Emanuele Curotto
Despite the fact that the \emph{para}--hydrogen molecule ($p$--H$_2$) and its isotopomers ($o$--D$_2$ and $p$--T$_2$) are commonly modelled as spherical objects due to the large separation between rotational states, there may be situations (\emph{e.g.} adsorption in pores and on surfaces) in which such an approximation neglects important degrees of freedom (\emph{i.e.} the rotational ones) and introduces uncontrolled biases in the predicted properties. To better understand when approximating such molecules as spheres introduces shortcomings in their representation, we employed diffusion Monte Carlo to simulate small/medium--sized molecular aggregates, either isolated in space or experiencing external model potentials, to compute energetic quantities and distribution functions...
June 15, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/28616484/climatic-suitability-influences-species-specific-abundance-patterns-of-australian-flying-foxes-and-risk-of-hendra-virus-spillover
#18
Gerardo A Martin, Carlos Yanez-Arenas, Billie J Roberts, Carla Chen, Raina K Plowright, Rebecca J Webb, Lee F Skerratt
Hendra virus is a paramyxovirus of Australian flying fox bats. It was first detected in August 1994, after the death of 20 horses and one human. Since then it has occurred regularly within a portion of the geographical distribution of all Australian flying fox (fruit bat) species. There is, however, little understanding about which species are most likely responsible for spillover, or why spillover does not occur in other areas occupied by reservoir and spillover hosts. Using ecological niche models of the four flying fox species we were able to identify which species are most likely linked to spillover events using the concept of distance to the niche centroid of each species...
December 2016: One Health
https://www.readbyqxmd.com/read/28616199/global-realized-niche-divergence-in-the-african-clawed-frog-xenopus-laevis
#19
Dennis Rödder, Flora Ihlow, Julien Courant, Jean Secondi, Anthony Herrel, Rui Rebelo, G J Measey, Francesco Lillo, F A De Villiers, Charlotte De Busschere, Thierry Backeljau
Although of crucial importance for invasion biology and impact assessments of climate change, it remains widely unknown how species cope with and adapt to environmental conditions beyond their currently realized climatic niches (i.e., those climatic conditions existing populations are exposed to). The African clawed frog Xenopus laevis, native to southern Africa, has established numerous invasive populations on multiple continents making it a pertinent model organism to study environmental niche dynamics. In this study, we assess whether the realized niches of the invasive populations in Europe, South, and North America represent subsets of the species' realized niche in its native distributional range or if niche shifts are traceable...
June 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/28616196/geographic-characteristics-of-sable-martes-zibellina-distribution-over-time-in-northeast-china
#20
Rui Zhang, Li Yang, Lin Ai, Qiuyuan Yang, Minhao Chen, Jingxi Li, Lei Yang, Xiaofeng Luan
Understanding historical context can help clarify the ecological and biogeographic characteristics of species population changes. The sable (Martes zibellina) population has decreased dramatically in Northeast China since the l950s, and understanding the changes in its distribution over time is necessary to support conservation efforts. To achieve this goal, we integrated ecological niche modeling and historical records of sables to estimate the magnitude of change in their distribution over time. Our results revealed a 51...
June 2017: Ecology and Evolution
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