bluuebunny/crossref_metadata_2025_split huggingface dataset:
The landscape of fear as an emergent property of heterogeneity: Contrasting patterns of predation risk in grassland ecosystems
Authors: Atuo Fidelis Akunke , O'Connell Timothy John 
Published: May 2017

AbstractThe likelihood of encountering a predator influences prey behavior and spatial distribution such that non‐consumptive effects can outweigh the influence of direct predation. Prey species are thought to filter information on perceived predator encounter rates in physical landscapes into a landscape of fear defined by spatially explicit heterogeneity in predation risk. The presence of multiple predators using different hunting strategies further complicates navigation through a landscape of fear and potentially exposes prey to greater risk of predation. The juxtaposition of land cover types likely influences overlap in occurrence of different predators, suggesting that attributes of a landscape of fear result from complexity in the physical landscape. Woody encroachment in grasslands furnishes an example of increasing complexity with the potential to influence predator distributions. We examined the role of vegetation structure on the distribution of two avian predators, Red‐tailed Hawk (Buteo jamaicensis) and Northern Harrier (Circus cyaneus), and the vulnerability of a frequent prey species of those predators, Northern Bobwhite (Colinus virginianus). We mapped occurrences of the raptors and kill locations of Northern Bobwhite to examine spatial vulnerability patterns in relation to landscape complexity. We use an offset model to examine spatially explicit habitat use patterns of these predators in the Southern Great Plains of the United States, and monitored vulnerability patterns of their prey species based on kill locations collected during radio telemetry monitoring. Both predator density and predation‐specific mortality of Northern Bobwhite increased with vegetation complexity generated by fine‐scale interspersion of grassland and woodland. Predation pressure was lower in more homogeneous landscapes where overlap of the two predators was less frequent. Predator overlap created areas of high risk for Northern Bobwhite amounting to 32% of the land area where landscape complexity was high and 7% where complexity was lower. Our study emphasizes the need to evaluate the role of landscape structure on predation dynamics and reveals another threat from woody encroachment in grasslands.
Single nucleotide polymorphism barcoding of cytochrome c oxidase I sequences for discriminating 17 species of Columbidae by decision tree algorithm
Authors: Yang Cheng‐Hong , Wu Kuo‐Chuan , Dahms Hans‐Uwe , Chuang Li‐Yeh , Chang Hsueh‐Wei 
Published: May 2017

AbstractDNA barcodes are widely used in taxonomy, systematics, species identification, food safety, and forensic science. Most of the conventional DNA barcode sequences contain the whole information of a given barcoding gene. Most of the sequence information does not vary and is uninformative for a given group of taxa within a monophylum. We suggest here a method that reduces the amount of noninformative nucleotides in a given barcoding sequence of a major taxon, like the prokaryotes, or eukaryotic animals, plants, or fungi. The actual differences in genetic sequences, called single nucleotide polymorphism (SNP) genotyping, provide a tool for developing a rapid, reliable, and high‐throughput assay for the discrimination between known species. Here, we investigated SNPs as robust markers of genetic variation for identifying different pigeon species based on available cytochrome c oxidase I (COI) data. We propose here a decision tree‐based SNP barcoding (DTSB) algorithm where SNP patterns are selected from the DNA barcoding sequence of several evolutionarily related species in order to identify a single species with pigeons as an example. This approach can make use of any established barcoding system. We here firstly used as an example the mitochondrial gene COI information of 17 pigeon species (Columbidae, Aves) using DTSB after sequence trimming and alignment. SNPs were chosen which followed the rule of decision tree and species‐specific SNP barcodes. The shortest barcode of about 11 bp was then generated for discriminating 17 pigeon species using the DTSB method. This method provides a sequence alignment and tree decision approach to parsimoniously assign a unique and shortest SNP barcode for any known species of a chosen monophyletic taxon where a barcoding sequence is available.
Factors shaping community assemblages and species co‐occurrence of different trophic levels
Authors: Trivellone Valeria , Bougeard Stephanie , Giavi Simone , Krebs Patrik , Balseiro Diego , Dray Stephane , Moretti Marco 
Published: May 2017

AbstractSpecies assemblages are the results of various processes, including dispersion and habitat filtering. Disentangling the effects of these different processes is challenging for statistical analysis, especially when biotic interactions should be considered. In this study, we used plants (producers) and leafhoppers (phytophagous) as model organisms, and we investigated the relative importance of abiotic versus biotic factors that shape community assemblages, and we infer on their biotic interactions by applying three‐step statistical analysis. We applied a novel statistical analysis, that is, multiblock Redundancy Analysis (mbRA, step 1) and showed that 51.8% and 54.1% of the overall variation in plant and leafhopper assemblages are, respectively, explained by the two multiblock models. The most important blocks of variables to explain the variations in plant and leafhopper assemblages were local topography and biotic factors. Variation partitioning analysis (step 2) showed that pure abiotic filtering and pure biotic processes were relatively less important than their combinations, suggesting that biotic relationships are strongly structured by abiotic conditions. Pairwise co‐occurrence analysis (step 3) on generalist leafhoppers and the most common plants identified 40 segregated species pairs (mainly between plant species) and 16 aggregated pairs (mainly between leafhopper species). Pairwise analysis on specialist leafhoppers and potential host plants clearly revealed aggregated patterns. Plant segregation suggests heterogeneous resource availability and competitive interactions, while leafhopper aggregation suggests host feeding differentiation at the local level, different feeding microhabitats on host plants, and similar environmental requirements of the species. Using the novel mbRA, we disentangle for the first time the relative importance of more than five distinct groups of variables shaping local species communities. We highlighted the important role of abiotic processes mediated by bottom‐up effects of plants on leafhopper communities. Our results revealed that in‐field structure diversification and trophic interactions are the main factors causing the co‐occurrence patterns observed.
Perpetual ingroup victimhood as a distorted lens: Effects on attribution and categorization
Authors: Schori‐Eyal Noa , Klar Yechiel , Ben‐Ami Yarden 
Published: May 2017

AbstractAlthough the effects of group‐based victimhood on attitudes and emotions have been demonstrated in previous research, the ways it affects cognitive processes remain unclear. Four studies examined how a perpetual ingroup victimhood orientation (PIVO) affects cognitive biases. High levels of PIVO were associated with the categorization of more outgroups as hostile to the ingroup, and more rapid responses when using an enmity criterion (Study 1). PIVO was also associated with more attributions of malevolent intentions and fewer attributions of neutral intentions to outgroup members in ambiguous situations (Study 2a); when primed with reminders of historical group trauma, attribution of malevolent intentions increased among high‐ but not low‐ PIVO individuals (Study 2b). However, the effect extended to all participants when using a larger sample (Study 2c). The implications of these categorization and attributional biases are discussed in particular as regards the self‐perpetuating nature of perceived group victimhood.
The rhetorical complexity of competitive and common victimhood in conversational discourse
Authors: McNeill Andrew , Pehrson Samuel , Stevenson Clifford 
Published: May 2017

AbstractMuch current research on collective victimhood acknowledges the role of rhetoric but does not fully address the implications for micro‐level variation in personal expressions of victimhood. The focus has tended to be on individual differences in collective victimhood construals where people may either see their group as the sole possessor of victim status or may incorporate other groups into an inclusive category. Although recent research sees a strategic element in some ‘inclusivity’, we argue that all claims of victimhood are strategic. By using a discursive approach, we show variability in the expression of victimhood and how this accomplishes different activities in conversations. Several focus groups consisting of victims from Northern Ireland were analysed to identify presentations of victimhood and their relation to the unfolding dynamics of the conversation. We demonstrate that presentation of victimhood is an interactional concern, link this to the concept of ‘needs’ and suggest implications this might have.
An application of the prototype willingness model to drivers' speeding behaviour
Authors: Elliott Mark A. , McCartan Rebecca , Brewster Sarah E. , Coyle Dionne , Emerson Lindsey , Gibson Kayleigh 
Published: May 2017

AbstractWe tested the prototype willingness model (PWM). The participants (N = 198) completed online questionnaire measures of PWM constructs (Time 1) and subsequent speeding behaviour (Time 2). Path analyses showed that the PWM accounted for 89% of the variance in subsequent (self‐reported) speeding behaviour. This significantly exceeded the variance accounted for by the theory of planned behaviour. In line with the PWM, both behavioural intention and behavioural willingness had direct effects on behaviour. Behavioural willingness had a significantly larger effect. Attitude and subjective norm both had indirect effects on behaviour through both behavioural intention and behavioural willingness. Prototype (similarity) perceptions had indirect effects on behaviour through behavioural willingness only. The findings support the notion that driving is governed by reactive decision‐making (willingness), underpinned by prototype perceptions, attitudes and subjective norms, to a greater extent than it is deliberative decision‐making (intentions), underpinned by attitudes and subjective norms. The implications for safety interventions are discussed.
Imagined intergroup contact promotes support for human rights through increased humanization
Authors: Prati Francesca , Loughnan Steve 
Published: May 2017

AbstractDehumanization concerns the denial of others' human uniqueness (animalistic dehumanization) or human nature (mechanistic dehumanization). Imagined intergroup contact has been suggested to be an effective technique for reducing dehumanization. We examined whether this intervention might primarily work by increasing the type of humanness the group specifically lacks. Study 1 revealed that after imagining contact with an animalized out‐group (i.e., Gypsy people), participants attributed higher levels of human uniqueness. Study 2 replicated this finding, eliminating improved intergroup attitudes as an alternative explanation. Further, it demonstrated that imagined contact increased support for human rights, and that this was mediated by increased adscription of human uniqueness. Study 3 confirmed previous evidence by showing that after imagining contact with a mechanized out‐group (i.e., Japanese people), participants attributed higher levels of human nature that explains support for human rights. Overall, imagined contact specifically works at increasing the type of humanness the group is typically denied.
Why are conservatives happier than liberals? Comparing different explanations based on system justification, multiple group membership, and positive adjustment
Authors: Butz Sebastian , Kieslich Pascal J. , Bless Herbert 
Published: May 2017

AbstractThis study examined the relation between conservatism and life satisfaction. Analyses based on data from a representative German survey (ALLBUS 2010) revealed a positive relation between conservatism and self‐reported life satisfaction, thus supporting prior claims of this link. Different accounts have been proposed for this relationship, suggesting system justification, positive adjustment, or multiple group membership as potential mediators. Going beyond prior research, this study allowed for a comparison between these different mechanisms. Analyses revealed that system justification and one of the three examined constructs related to positive adjustment (i.e., religiosity) were significant mediators of the positive relationship between political conservatism and life satisfaction. Comparable results were obtained after controlling for a number of sociodemographic variables. The present findings indicate (i) that conservatives report to be more satisfied with their lives than liberals and (ii) that this difference is in part due to conservatives' system justification and religiosity.
Dissonance and abstraction: Cognitive conflict leads to higher level of construal
Authors: Cancino‐Montecinos Sebastian , Björklund Fredrik , Lindholm Torun 
Published: May 2017

AbstractThis study investigated the effects of cognitive conflict on abstract thinking. According to action‐identification theory, an ambiguous and unfamiliar situation might propel an individual to a more abstract mindset. Based on this premise, cognitive conflict was hypothesized to put people in an abstract mindset. The induced compliance paradigm, in which participants are asked to write a counter‐attitudinal essay under either low choice (producing little dissonance) or high choice (producing more dissonance), was employed. Results showed that an abstract mindset was in fact activated in the induced compliance paradigm, and this effect was more pronounced for participants having a more concrete mindset to begin with. The results suggest that the experience of cognitive conflict is closely related to increased abstraction.
Trust maintenance as a function of construal level and attributions: The case of apologies
Authors: van Houwelingen Gijs , van Dijke Marius , De Cremer David 
Published: May 2017

AbstractWhen do recipients of an apology (“trustors”) base their decision to trust a perpetrator (a “trustee”) on the attributional information embedded in an apology? Attributions provide a detailed account of the trustee's causal involvement in committing a transgression. We therefore argue that trustors in a low construal level mindset use this information in their trusting decision. However, trustors in a high construal level mindset likely consider all apologies as simple statements of regret, regardless of the attributional information they contain. We find support for this argument in four laboratory experiments. This research nuances the idea that to restore trust by means of an apology, the trustee must only use an effective attribution for a negative outcome. We also present a more realistic understanding of the process leading from apologies to trust than has been offered in previous work by simultaneously considering the role of the trustor and that of the trustee in the trust restoration process.
Using nostalgia to reduce prejudice toward immigrants
Authors: Gravani Maria , Soureti Anastasia , Stathi Sofia 
Published: May 2017

AbstractBased on research that points to nostalgia as a means of warding off stigmatization, this study suggests that nostalgia triggered by a past encounter with a close immigrant from the in‐group can improve attitudes toward out‐group immigrants. Focusing on immigration in Greece, 99 university students (M = 23.06, SD = 5.44) participated in the study. Participants who were induced with nostalgia reported higher social connectedness, inclusion of the out‐group in the self, out‐group trust, and positive out‐group attitude compared with participants in the control condition. The aforementioned findings demonstrated that the positive effects of nostalgia about a close in‐group member (in this case, a Greek person), who shares an identity with the out‐group (being an immigrant), can generalize to the out‐group as a whole (immigrants in general). Further implications and future directions on the use of nostalgia as a means of improving attitudes are addressed.
Nostalgia motivates pursuit of important goals by increasing meaning in life
Authors: Sedikides Constantine , Cheung Wing‐Yee , Wildschut Tim , Hepper Erica G. , Baldursson Einar , Pedersen Bendt 
Published: May 2017

AbstractThis research focused on existential and motivational implications of the emotion of nostalgia. Nostalgia (relative to control) increased meaning in life, which, in turn, galvanised intentions to pursue one's most important goal (Experiment 1) and to pursue one's most important, but not least important, goal (Experiment 2). The basic pattern held in two cultures (British and Danish) independently of positive affect. This is the first evidence that nostalgia has specific motivational consequences (i.e., pursuit of more, but not less, important goals) and transmits these consequences via meaning in life. Also, this is the first evidence that meaning is associated with specific motivational consequences. Discussion considers the relevance of the findings for the emotion and motivation literatures.
LC‐MS/MS isomeric profiling of permethylated N‐glycans derived from serum haptoglobin of hepatocellular carcinoma (HCC) and cirrhotic patients
Authors: Huang Yifan , Zhou Shiyue , Zhu Jianhui , Lubman David M. , Mechref Yehia 
Published: May 2017

AbstractEarly stage detection and cancer treatment demand the identification of reliable biomarkers. Over the past decades, efforts have been devoted to assess the variation of glycosylation level as well as the glycan structures of proteins in blood or serum, associated with the development and/or progression of several cancers, including liver. Herein, an LC‐MS/MS‐based analysis was conducted to define the glycosylation patterns of haptoglobin glycoprotein derived from sera collected from cirrhotic and hepatocellular carcinoma (HCC) patients. The haptoglobin samples were extracted from serum using an antibody‐immobilized column prior to the release of N‐glycans. A comparison of non‐isomeric and isomeric permethylated glycan forms was achieved using C18 and porous graphitic carbon (PGC) columns, respectively. In the case of C18‐LC‐MS/MS analysis, 25 glycan structures were identified of which 10 sialylated structures were found to be statistically significant between the two cohorts. Also, 8 out of 34 glycan structures identified by PGC‐LC‐MS/MS were found to be statistically significant, suggesting that isomeric distributions of a particular glycan composition were different in abundances between the two cohorts. The glycan isoform patterns distinguished early stage HCC from cirrhotic patients. Both retention times and tandem mass spectra were utilized to determine the specific isomeric glycan structures. All of the glycan isomers, which were statistically significant, were either branch fucosylated or composed of α‐2,6 linked sialic acid moieties. The result of this study demonstrates the potential importance of isomeric separation for defining disease prompted aberrant glycan changes. The levels of several glycan isoforms effectively distinguished early stage HCC from cirrhosis.
Measurement Error and Bias in Value‐Added Models
Authors: Kane Michael T. 
Published: May 2017

AbstractBy aggregating residual gain scores (the differences between each student's current score and a predicted score based on prior performance) for a school or a teacher, value‐added models (VAMs) can be used to generate estimates of school or teacher effects. It is known that random errors in the prior scores will introduce bias into predictions of the current scores, and thereby, into the estimated residual gain scores and VAM scores. The analyses in this paper examine the origins of this bias and its potential impact and indicate that the bias is an increasing linear function of the student's prior achievement and can be quite large (e.g., half a true‐score standard deviation) for very low‐scoring and high‐scoring students. To the extent that students with relatively low or high prior scores are clustered in particular classes and schools, the student‐level bias will tend to generate bias in VAM estimates of teacher and school effects. Adjusting for this bias is possible, but it requires estimates of generalizability (or reliability) coefficients that are more accurate and precise than those that are generally available for standardized achievement tests.
Fracture Prospectively Recorded From Prepuberty to Young Adulthood: Are They Markers of Peak Bone Mass and Strength in Males?
Authors: Chevalley Thierry , Bonjour Jean-Philippe , Audet Marie-Claude , Merminod Fanny , van Rietbergen Bert , Rizzoli Rene , Ferrari Serge 
Published: May 2017

ABSTRACT

Fractures are common in otherwise healthy children and adolescents. They result from trauma of varying severity. Some reflect a greater skeletal fragility. A long-term implication of these fractures is their potentiality to predict adult bone fragility and increased risk of osteoporosis in later life. Using dual-energy X-ray absorptiometry (DXA), high-resolution peripheral quantitative computed tomography (HR-pQCT), and micro-finite element analysis (μFEA) measurements, we previously found in 124 healthy females, followed from the age of 7.9 to 20.4 years, substantial deficits in both structural and strength components of the radius in the 42 girls who sustained a fracture during skeletal development. The objective of the current study was to assess in healthy males the relationship between fracture during development and expression of bone fragility in adulthood. A cohort of 152 boys was followed from age 7.4 ± 04 (mean ± SD) to 22.6 ± 0.7 years, ie, when peak bone mass is attained. Ninety participants (59.2%) sustained at least one fracture during growth, with highest incidence within the 10- to 13-year age range. Forearm was the most frequent site of fractures. At 7.4 years, several bone DXA-measured variables (areal bone mineral density [aBMD], bone mineral content [BMC]) were lower in the group with a positive fracture history during skeletal development compared with the non-fractured group. In contrast, at 22.6 years, no DXA-measured sites, including forearm, indicated a deficit in the fractured group compared with the non-fractured group. Likewise, at 22.6 years, neither HR-pQCT nor μFEA measurements, including distal radius, showed a structural or strength deficit in the fractured group. These results markedly contrast with a similar prospective study using the same technical and clinical design in 124 healthy girls. In conclusion, our prospective studies suggest a sex difference in the predictability of bone fragility in young adults who sustained fractures during childhood and adolescence. This difference might be related to the degree of trauma severity, usually lower in girls than in boys. © 2017 American Society for Bone and Mineral Research.