bluuebunny/crossref_metadata_2025_split huggingface dataset:
Refugia under threat: Mass bleaching of coral assemblages in high‐latitude eastern Australia
Authors: Kim Sun W. , Sampayo Eugenia M. , Sommer Brigitte , Sims Carrie A. , Gómez‐Cabrera Maria del C. , Dalton Steve J. , Beger Maria , Malcolm Hamish A. , Ferrari Renata , Fraser Nicola , Figueira Will F. , Smith Stephen D. A. , Heron Scott F. , Baird Andrew H. , Byrne Maria , Eakin C. Mark , Edgar Robert , Hughes Terry P. , Kyriacou Nicole , Liu Gang , Matis Paloma A. , Skirving William J. , Pandolfi John M. 
Published: August 2019

AbstractEnvironmental anomalies that trigger adverse physiological responses and mortality are occurring with increasing frequency due to climate change. At species' range peripheries, environmental anomalies are particularly concerning because species often exist at their environmental tolerance limits and may not be able to migrate to escape unfavourable conditions. Here, we investigated the bleaching response and mortality of 14 coral genera across high‐latitude eastern Australia during a global heat stress event in 2016. We evaluated whether the severity of assemblage‐scale and genus‐level bleaching responses was associated with cumulative heat stress and/or local environmental history, including long‐term mean temperatures during the hottest month of each year (SSTLTMAX), and annual fluctuations in water temperature (SSTVAR) and solar irradiance (PARZVAR). The most severely‐bleached genera included species that were either endemic to the region (Pocillopora aliciae) or rare in the tropics (e.g. Porites heronensis). Pocillopora spp., in particular, showed high rates of immediate mortality. Bleaching severity of Pocillopora was high where SSTLTMAX was low or PARZVAR was high, whereas bleaching severity of Porites was directly associated with cumulative heat stress. While many tropical Acropora species are extremely vulnerable to bleaching, the Acropora species common at high latitudes, such as A. glauca and A. solitaryensis, showed little incidence of bleaching and immediate mortality. Two other regionally‐abundant genera, Goniastrea and Turbinaria, were also largely unaffected by the thermal anomaly. The severity of assemblage‐scale bleaching responses was poorly explained by the environmental parameters we examined. Instead, the severity of assemblage‐scale bleaching was associated with local differences in species abundance and taxon‐specific bleaching responses. The marked taxonomic disparity in bleaching severity, coupled with high mortality of high‐latitude endemics, point to climate‐driven simplification of assemblage structures and progressive homogenisation of reef functions at these high‐latitude locations.
The responses of soil organic carbon mineralization and microbial communities to fresh and aged biochar soil amendments
Authors: Liu Zhiwei , Zhu Mengtao , Wang Jiameng , Liu Xiuxia , Guo Wenjie , Zheng Jufeng , Bian Rongjun , Wang Genmei , Zhang Xuhui , Cheng Kun , Liu Xiaoyu , Li Lianqing , Pan Genxing 
Published: August 2019

AbstractWhile biochar soil amendment has been widely proposed as a soil organic carbon (SOC) sequestration strategy to mitigate detrimental climate changes in global agriculture, the SOC sequestration was still not clearly understood for the different effects of fresh and aged biochar on SOC mineralization. In the present study of a two‐factorial experiment, topsoil samples from a rice paddy were laboratory‐incubated with and without fresh or aged biochar pyrolyzed of wheat residue and with and without crop residue‐derived dissolved organic matter (CRM) for monitoring soil organic matter decomposition under controlled conditions. The six treatments included soil with no biochar, with fresh biochar and with aged biochar treated with CRM, respectively. For fresh biochar treatment, the topsoil of a same rice paddy was amended with wheat biochar directly from a pyrolysis wheat straw, the soil with aged biochar was collected from the same soil 6 years following a single amendment of same biochar. Total CO2 emission from the soil was monitored over a 64 day time span of laboratory incubation, while microbial biomass carbon and phospholipid fatty acid (PLFA) were determined at the end of incubation period. Without CRM, total organic carbon mineralization was significantly decreased by 38.8% with aged biochar but increased by 28.9% with fresh biochar, compared to no biochar. With CRM, however, the significantly highest net carbon mineralization occurred in the soil without biochar compared to the biochar‐amended soil. Compared to aged biochar, fresh biochar addition significantly increased the total PLFA concentration by 20.3%–33.8% and altered the microbial community structure by increasing 17:1ω8c (Gram‐negative bacteria) and i17:0 (Gram‐positive bacteria) mole percentages and by decreasing the ratio of fungi/bacteria. Furthermore, biochar amendment significantly lowered the metabolic quotient of SOC decomposition, thereby becoming greater with aged biochar than with fresh biochar. The finding here suggests that biochar amendment could improve carbon utilization efficiency by soil microbial community and SOC sequestration potential in paddy soil can be enhanced by the presence of biochar in soil over the long run.
Syntheses and nanocrystallization of NaF–M2O3–P2O5 NASICON‐like phosphate glasses (M = V, Ti, Fe)
Authors: Pietrzak Tomasz K. , Kruk‐Fura Paulina E. , Mikołajczuk Piotr J. , Garbarczyk Jerzy E. 
Published: August 2019

AbstractSix NASICON‐type phosphate glasses with a wide variety of compositions (Na3M2(PO4)2F3, where M2 = V2, Ti2, Fe2, TiV, FeV, and FeTi) were synthesized using melt‐quenching and double‐crucible techniques. Their glass transition and crystallization temperatures were determined from differential thermal analysis experiments. The electrical properties were studied with impedance spectroscopy. We found that depending on temperature and composition the studied materials exhibit predominant electronic, ionic, or mixed conduction. This observation is interesting from both fundamental and application point of view (eg, in all‐solid‐state batteries). In general, the conductivity of glasses ranged from 3·10−13 to 10−10 S/cm at room temperature, with activation energies varying from 0.65 to 0.73 eV. After crystallization at 600°C, the values of conductivity noticeably increased. For nanocrystalline materials, they were between 10−11 and 10−7 S/cm (at room temperature). The values of the activation energy spread from 0.53 to 0.70 eV. Most of the glasses exhibited predominant electronic conductivity. After nanocrystallization, the ionic transference number considerably increased in almost all samples. This study proves that thermal nanocrystallization can be used to synthesize nanocrystalline NASICON‐like cathode materials for Na‐ion batteries from their glassy analogs. We believe that this method can be adopted also to other interesting sodium compounds in the future.
Pulse wave velocity is decreased with obesity in an elderly Chinese population
Authors: Yang Hui , Zhao Jiehui , Deng Xueqin , Tan Isabella , Butlin Mark , Avolio Alberto , Zuo Junli 
Published: August 2019

AbstractObesity is generally considered an undesirable risk factor for cardiovascular disease; however, obese subjects with heart failure paradoxically can have better outcomes than their lean counterparts. This study aimed to investigate this characteristic in an elderly Chinese population. Elderly participants (N = 414, age 77 ± 11 years, 211 males) were recruited from a Chinese community‐dwelling elderly population. Subjects were divided into 3 groups according to body mass index (BMI ≤ 25, normal; 25‐28, overweight; and ≥28, obese). Arterial stiffness was assessed by brachial‐ankle pulse wave velocity (baPWV), and the atherosclerosis status was evaluated with the ankle brachial index (ABI). Brachial systolic blood pressure (BSBP) was significantly higher as BMI increased (135 ± 18.4, 138 ± 18.3, 147 ± 17.6 mm Hg;P = .003) adjusted for age, sex, and heart rate. However, baPWV was significantly lower as BMI increased (baPWV 1830 ± 18, 1793 ± 25, 1704 ± 36 cm/s;P = .008) in the three groups, even with additional adjustment for BSBP. BMI showed a significant negative correlation with baPWV (r = −.170,P = .001) after adjusting for confounding factors. Using multiple linear regression, BMI was negatively and independently associated with baPWV (β = −.190,P < .001) especially for age <80 years. Arterial stiffness, as measured by baPWV, is lower in overweight subjects in a Chinese elderly population compared to those with normal body weight. ABI showed no relationship with BMI. These findings suggest that reduced arterial stiffness in the overweight population, independent of confounding factors, may contribute to the explanation of the “obesity paradox.”
The role of limited salience of speech in selective attention to faces in toddlers with autism spectrum disorders
Authors: Shic Frederick , Wang Quan , Macari Suzanne L. , Chawarska Katarzyna 
Published: August 2019

BackgroundImpaired attention to faces of interactive partners is a marker for autism spectrum disorder (ASD) in early childhood. However, it is unclear whether children with ASD avoid faces or find them less salient and whether the phenomenon is linked with the presence of eye contact or speech.MethodsWe investigated the impacts of speech (SP) and direct gaze (DG) on attention to faces in 22‐month‐old toddlers with ASD (n = 50) and typically developing controls (TD, n = 47) using the Selective Social Attention 2.0 (SSA 2.0) task. The task consisted of four conditions where the presence (+) and absence (−) of DG and SP were systematically manipulated. The severity of autism symptoms, and verbal and nonverbal skills were characterized concurrently with eye tracking at 22.4 (SD = 3.2) months and prospectively at 39.8 (SD = 4.3) months.ResultsToddlers with ASD looked less than TD toddlers at face and mouth regions only when the actress was speaking (direct gaze absence with speech, DG−SP+: d = 0.99, p < .001 for face, d = 0.98, p < .001 for mouth regions; direct gaze present with speech, DG+SP+, d = 1.47, p < .001 for face, d = 1.01, p < .001 for mouth regions). Toddlers with ASD looked less at the eye region only when both gaze and speech cues were present (d = 0.46, p = .03). Salience of the combined DG and SP cues was associated concurrently and prospectively with the severity of autism symptoms, and the association remained significant after controlling for verbal and nonverbal levels.ConclusionsThe study links poor attention to faces with limited salience of audiovisual speech and provides no support for the face avoidance hypothesis in the early stages of ASD. These results are consequential for research on early discriminant and predictive biomarkers as well as identification of novel treatment targets.
Maternal responsiveness to suckling is modulated by time post‐nursing: A behavioural and c‐Fos/oxytocin immunocytochemistry study in rabbits
Authors: Jiménez Angeles , González‐Mariscal Gabriela 
Published: August 2019

AbstractDoe rabbits nurse once/day for approximately 3 minutes, with circadian periodicity, inside the nest box. The amount of suckling received at each bout regulates this behaviour because reducing the litter size to four kits or less disrupts nursing circadian periodicity and increases suckling bout duration. Additionally, the likelihood that does will nurse kits at a given time of day depends on the time elapsed since the last suckling episode and the litter size nursed then. We hypothesised that the time elapsed since the last nursing would impact the number of c‐Fos immunoreactive (IR) cells observed after suckling five kits and also that observed before the next nursing (“no kits”). Suckling significantly increased, relative to “no kits”, the number of c‐Fos‐IR cells in the medial preoptic area and lateral septum but not in the bed nucleus of the stria terminalis (BNST), suprachiasmatic nucleus or ventromedial hypothalamus in does nursing at 18 or 24 hours after the previous bout. No effects of suckling were observed in mothers nursing at 6 hours. Does given kits at 3 hours post last suckling refused to nurse but, in the remaining three groups, all does nursed normally. At “no kits”, more c‐Fos‐IR cells were seen (in all regions except the BNST) in does given kits at 24 hours after the last nursing and killed 1 hour later (ie, 4 hours after lights on) than in those killed earlier. The percentage of oxytocinergic (OT) cells co‐expressing c‐Fos was not modified by nursing in the paraventricular or supraoptic nuclei but, in the latter, the largest number of total OT‐IR cells occurred at 18 and 24 hours post‐last nursing. In conclusion, the responsiveness of particular forebrain regions involved in regulating circadian rhythms, lactation, and maternal behaviour is modulated by suckling and time of day.
Treatment of congenital extrahepatic portosystemic shunts in dogs: A systematic review and meta‐analysis
Authors: Serrano Gonçalo , Charalambous Marios , Devriendt Nausikaa , de Rooster Hilde , Mortier Femke , Paepe Dominique 
Published: August 2019

AbstractBackgroundSeveral options have been proposed for the treatment of congenital extrahepatic portosystemic shunts (cEHPSS) in dogs, but formal comparisons among different treatment options are currently unavailable. A previous evidence‐based review (2012) found low quality of evidence for papers assessing the treatment of cEHPSS in dogs.ObjectivesTo assess the quality of evidence available in the treatment of cEHPSS, summarize the current state of knowledge with respect to outcome after cEHPSS management, and compare different treatment techniques.AnimalsNot used.MethodsA bibliographic search was performed without date or language restrictions. Studies were assessed for quality of evidence (study design, study group sizes, subject enrollment quality, and overall risk of bias) and outcome measures reported (perioperative outcome, clinical outcome, and surgical or interventional outcome), all reported with 95% confidence intervals. A network meta‐analysis was performed.ResultsForty‐eight studies were included. Six retrospective studies (grade 4b) compared 2 techniques and 7 were abstracts (grade 5). The quality of evidence was low and risk of bias high. Regarding surgical outcome, statistically significant superiority of ameroid constrictor over thin film band was observed (P= .003). No other comparisons were statistically significant.Conclusions and Clinical ImportanceThe evidence base of choice of treatment of cEHPSS in dogs remains weak despite recent publications on the subject. Ameroid is superior to thin film band in causing EHPSS closure. Blinded randomized studies comparing different treatment modalities, which routinely include postoperative imaging to assess cEHPSS closure and acquired portosystemic shunt development are essential.
Effects of dispersal barriers and geographic distance on the genetic structure of a narrowly distributed frog in a spatially structured landscape
Authors: Pan T. , Zhou K. , Zhang S.‐L. , Shu Y.‐L. , Zhang J.‐H. , Li E. , Wang M.‐S. , Yan P. , Wu H.‐L. 
Published: August 2019

AbstractLandscape features (e.g., mountains and rivers) can act as barriers to dispersal and gene flow, and therefore impede population connectivity, increasing genetic differentiation between populations. The concave‐eared torrent frog (Odorrana tormota) is a rare, stream‐associated species in eastern China. In this study, we investigated the genetic structure and population demography of this narrowly distributed frog based on mitochondrial Cyt b gene and seven nuclear microsatellite loci. As a result, we found that the rare frog still preserved a relatively high level of genetic diversity compared to some other amphibia. Population structure analyses distinctly identified three or four tentative genetic clusters for the species in the study area. Additionally, by fine‐scale spatial autocorrelation analysis, significant positive genetic structure was uncovered in the shortest distance classes (0–5 km, 5–10 km). Demographic analyses revealed a population expansion (0.075–0.017 Mya) and 15 times population decline (c. 9000 years ago). In conclusion, we supposed that stable montane environments and associated historical population expansion might provide an opportunity for the species to harbor high genetic diversity. The relatively recent population decline might be correlated with climate change as well as genetic differentiation among populations. In addition, our results showed that, on a small landscape scale, dispersal is closely linked to geographic distance and the presence of river systems may not substantially affect the genetic structure for the narrowly distributed O. tormota.
Variation and repeatability of home range in a forest‐dwelling terrestrial turtle: implications for prescribed fire in forest management
Authors: Roe J. H. , Kish A. L. , Nacy J. P. 
Published: August 2019

AbstractAnimal movements and use of space are in part determined by interactions between individual attributes such as sex and body size and extrinsic environmental factors such as the seasonal availability, quality and spatial configuration of resource patches in the landscape. Fire is a common and widespread disturbance process that has the potential to affect animal movements through modifications to the environment. Using radiotelemetry, we examined the contribution of these factors to variation in movements and home range over a 5‐year period in a forest‐dwelling terrestrial turtle, Terrapene carolina, at fire‐maintained and unburned habitats in the southeastern United States. Female turtles had annual home‐range sizes twice as large as males and moved longer distances per day during the nesting season (June and July), but males exhibited greater spatial fidelity from year to year. Turtles at the unburned site had home‐range sizes twice as large as those at the fire‐maintained site, and home‐range size also decreased with increasing frequency and extent of fire, but this latter effect was strongest in females. Home‐range behavior was highly repeatable within individuals of both sexes over time. This is the first evidence that fire influences the spatial ecology and movements of turtles, most likely through fire's impact on the spatial configuration, availability and quality of critical resources. That individuals behaved consistently through time, but differently from one another according to both intrinsic individual attributes and extrinsic environmental factors provides strong evidence of consistent inter‐ and intra‐population variation in space use and movement behaviors in T. carolina. Such intra‐specific behavioral variation suggests applying caution when extrapolating results to other sites across the geographic range of a species for use in conservation and management.
Oxygen isotope systematics of chondrule olivine, pyroxene, and plagioclase in one of the most pristine CV3Red chondrites (Northwest Africa 8613)
Authors: Hertwig Andreas T. , Kimura Makoto , Defouilloy Céline , Kita Noriko T. 
Published: August 2019

AbstractWe performed in situ oxygen three‐isotope measurements of chondrule olivine, pyroxenes, and plagioclase from the newly described CVRed chondrite NWA 8613. Additionally, oxygen isotope ratios of plagioclase in chondrules from the Kaba CV3OxB chondrite were determined to enable comparisons of isotope ratios and degree of alteration of chondrules in both CV lithologies. NWA 8613 was affected by only mild thermal metamorphism. The majority of oxygen isotope ratios of olivine and pyroxenes plot along a slope‐1 line in the oxygen three‐isotope diagram, except for a type II and a remolten barred olivine chondrule. When isotopic relict olivine is excluded, olivine, and low‐ and high‐Ca pyroxenes are indistinguishable regarding Δ17O values. Conversely, plagioclase in chondrules from NWA 8613 and Kaba plot along mass‐dependent fractionation lines. Oxygen isotopic disequilibrium between phenocrysts and plagioclase was caused probably by exchange of plagioclase with 16O‐poor fluids on the CV parent body. Based on an existing oxygen isotope mass balance model, possible dust enrichment and ice enhancement factors were estimated. Type I chondrules from NWA 8613 possibly formed at moderately high dust enrichment factors (50× to 150× CI dust relative to solar abundances); estimates for water ice in the chondrule precursors range from 0.2× to 0.6× the nominal amount of ice in dust of CI composition. Findings agree with results from an earlier study on oxygen isotopes in chondrules of the Kaba CV chondrite, providing further evidence for a relatively dry and only moderately high dust‐enriched disk in the CV chondrule‐forming region.
A target concentration strategy to determine ibuprofen dosing in children
Authors: Anderson Brian J. , Hannam Jacqueline A. 
Published: August 2019

AbstractBackgroundIbuprofen is widely used for ductus arteriosus closure in premature neonates and for analgesia in children and adults. There are no maturation descriptors of clearance. This lack of maturation understanding limits dosing recommendations from premature neonates to adulthood.MethodsPublished clearance estimates from different aged patients determined after administration from time‐concentration profiles were used to construct a maturation model based on size and age. Curve fitting was performed using nonlinear mixed‐effects models. A target concentration strategy was used to estimate maintenance dose at different ages.ResultsThere were three publications reporting an estimate of individual clearance estimates in premature neonates, three reporting population clearances in infants, 11 in children 2‐15 years (1 with individual and 9 with population clearances), and 13 adult studies (1 with individual and 12 with population clearances). Clearance maturation, standardized to a 70 kg person was described using the Hill equation. Mature clearance was 3.81 (CV 15.5%, 95%CI 3.72, 3.92) L/h/70 kg. The maturation half‐time was 36.8 (CV 9.2%, 95%CI 34.7, 40.9) weeks postmenstrual age and the Hill coefficient 11.5 (95%CI 8.1, 15). A target effect of four units (visual analogue scale 0‐10) correlated with an effect site concentration of 6.3 mg/L: a concentration achieved at trough after 400 mg 8 hourly in adults.ConclusionPreviously published pharmacokinetic parameters can be used to develop maturation models that address gaps in current knowledge regarding the influence of age on a drug's disposition. Maturation of ibuprofen clearance was rapid and was 90% of adult values by the first month of life in term neonates (ie, 44 weeks postmenstrual age) and 98% of standardized adult estimates by 3 months of age (53 weeks postmenstrual age). Clearance informed dosing predictions in all ages (premature neonate to adult) and matched those doses in common use in children older than 3 months.