University of Wisconsin–Eau Claire

Abstract Plant traits – the morphological, anatomical, physiological, biochemical and phenological characteristics of plants and their organs – determine how primary producers respond to environmental factors, affect other trophic levels, influence ecosystem processes and services and provide a link from species richness to ecosystem functional diversity. Trait data thus represent the raw material for a wide range of research from evolutionary biology, community and functional ecology to biogeography. Here we present the global database initiative named TRY, which has united a wide range of the plant trait research community worldwide and gained an unprecedented buy‐in of trait data: so far 93 trait databases have been contributed. The data repository currently contains almost three million trait entries for 69 000 out of the world's 300 000 plant species, with a focus on 52 groups of traits characterizing the vegetative and regeneration stages of the plant life cycle, including growth, dispersal, establishment and persistence. A first data analysis shows that most plant traits are approximately log‐normally distributed, with widely differing ranges of variation across traits. Most trait variation is between species (interspecific), but significant intraspecific variation is also documented, up to 40% of the overall variation. Plant functional types (PFTs), as commonly used in vegetation models, capture a substantial fraction of the observed variation – but for several traits most variation occurs within PFTs, up to 75% of the overall variation. In the context of vegetation models these traits would better be represented by state variables rather than fixed parameter values. The improved availability of plant trait data in the unified global database is expected to support a paradigm shift from species to trait‐based ecology, offer new opportunities for synthetic plant trait research and enable a more realistic and empirically grounded representation of terrestrial vegetation in Earth system models.

This study examines the relationship between psychosocial and study skill factors (PSFs) and college outcomes by meta-analyzing 109 studies. On the basis of educational persistence and motivational theory models, the PSFs were categorized into 9 broad constructs: achievement motivation, academic goals, institutional commitment, perceived social support, social involvement, academic self-efficacy, general self-concept, academic-related skills, and contextual influences. Two college outcomes were targeted: performance (cumulative grade point average; GPA) and persistence (retention). Meta-analyses indicate moderate relationships between retention and academic goals, academic self-efficacy, and academic-related skills (ps =.340,.359, and.366, respectively). The best predictors for GPA were academic self-efficacy and achievement motivation (ps =.496 and.303, respectively). Supplementary regression analyses confirmed the incremental contributions of the PSF over and above those of socioeconomic status, standardized achievement, and high school GPA in predicting college outcomes.

Plant traits-the morphological, anatomical, physiological, biochemical and phenological characteristics of plants-determine how plants respond to environmental factors, affect other trophic levels, and influence ecosystem properties and their benefits and detriments to people. Plant trait data thus represent the basis for a vast area of research spanning from evolutionary biology, community and functional ecology, to biodiversity conservation, ecosystem and landscape management, restoration, biogeography and earth system modelling. Since its foundation in 2007, the TRY database of plant traits has grown continuously. It now provides unprecedented data coverage under an open access data policy and is the main plant trait database used by the research community worldwide. Increasingly, the TRY database also supports new frontiers of trait-based plant research, including the identification of data gaps and the subsequent mobilization or measurement of new data. To support this development, in this article we evaluate the extent of the trait data compiled in TRY and analyse emerging patterns of data coverage and representativeness. Best species coverage is achieved for categorical traits-almost complete coverage for 'plant growth form'. However, most traits relevant for ecology and vegetation modelling are characterized by continuous intraspecific variation and trait-environmental relationships. These traits have to be measured on individual plants in their respective environment. Despite unprecedented data coverage, we observe a humbling lack of completeness and representativeness of these continuous traits in many aspects. We, therefore, conclude that reducing data gaps and biases in the TRY database remains a key challenge and requires a coordinated approach to data mobilization and trait measurements. This can only be achieved in collaboration with other initiatives.

Empirical studies and some high-profile anecdotal cases have demonstrated a link between suicidal ideation and experiences with bullying victimization or offending. The current study examines the extent to which a nontraditional form of peer aggression--cyberbullying--is also related to suicidal ideation among adolescents. In 2007, a random sample of 1,963 middle-schoolers from one of the largest school districts in the United States completed a survey of Internet use and experiences. Youth who experienced traditional bullying or cyberbullying, as either an offender or a victim, had more suicidal thoughts and were more likely to attempt suicide than those who had not experienced such forms of peer aggression. Also, victimization was more strongly related to suicidal thoughts and behaviors than offending. The findings provide further evidence that adolescent peer aggression must be taken seriously both at school and at home, and suggest that a suicide prevention and intervention component is essential within comprehensive bullying response programs implemented in schools.

Bullying in a school setting is an important social concern that has received increased scholarly attention in recent years. Specifically, its causes and effects have been under investigation by a number of researchers in the social and behavioral sciences. A new permutation of bullying, however, has recently arisen and become more common: Techsavvy students are turning to cyberspace to harass their peers. This exploratory article discusses the nature of bullying and its transmutation to the electronic world and the negative repercussions that can befall both its victims and instigators. In addition, findings are reported from a pilot study designed to empirically assess the nature and extent of online bullying. The overall goal of the current work is to illuminate this novel form of deviance stemming from the intersection of communications and computers and to provide a foundational backdrop on which future empirical research can be conducted.

Victimization on the Internet through what has been termed cyberbullying has attracted increased attention from scholars and practitioners. Defined as “willful and repeated harm inflicted through the medium of electronic text” (Patchin and Hinduja 2006 Patchin , J. W. and S. Hinduja . 2006 . “Bullies Move Beyond the Schoolyard: A Preliminary Look at Cyberbullying.” Youth Violence and Juvenile Justice 4 ( 2 ): 148 – 169 .[Crossref] , [Google Scholar]:152), this negative experience not only undermines a youth's freedom to use and explore valuable on-line resources, but also can result in severe functional and physical ramifications. Research involving the specific phenomenon—as well as Internet harassment in general—is still in its infancy, and the current work seeks to serve as a foundational piece in understanding its substance and salience. On-line survey data from 1,378 adolescent Internet-users are analyzed for the purposes of identifying characteristics of typical cyberbullying victims and offenders. Although gender and race did not significantly differentiate respondent victimization or offending, computer proficiency and time spent on-line were positively related to both cyberbullying victimization and offending. Additionally, cyberbullying experiences were also linked to respondents who reported school problems (including traditional bullying), assaultive behavior, and substance use. Implications for addressing this novel form of youthful deviance are discussed.

BACKGROUND: The behaviours of non-suicidal self-injury (NSSI) and deliberate self-harm (DSH) are prevalent among adolescents, and an increase of rates in recent years has been postulated. There is a lack of studies to support this postulation, and comparing prevalence across studies and nations is complicated due to substantial differences in the methodology and nomenclature of existing research. METHODS: We conducted a systematic review of current (2005 - 2011) empirical studies reporting on the prevalence of NSSI and DSH in adolescent samples across the globe. RESULTS: Fifty-two studies fulfilling the inclusion criteria were obtained for analysis. No statistically significant differences were found between NSSI (18.0% SD = 7.3) and DSH (16.1% SD = 11.6) studies. Assessment using single item questions led to lower prevalence rates than assessment with specific behaviour checklists. Mean prevalence rates have not increased in the past five years, suggesting stabilization. CONCLUSION: NSSI and DSH have a comparable prevalence in studies with adolescents from different countries. The field would benefit from adopting a common approach to assessment to aide cross-cultural study and comparisons.

Abstract. Ecologists need a common language of plant traits in order to make comparisons across regions and scales, pool data, and maximize the utility of the data. To develop such a set of traits we began with the primary challenges faced by plants: dispersal, establishment, and persistence in order to identify fundamental traits. Most of these traits are hard to measure, but advances in comparative ecology have suggested a number of easy to measure analogs. Unfortunately, some of the fundamental traits have no simple analog. The common core list includes: seed mass, seed shape, dispersal mode, clonality, specific leaf area, leaf water content, height, above‐ground biomass, life history, onset of flowering, stem density, and resprouting ability. Most of the traits can be measured quantitatively, but several traits on the list must still be measured qualitatively due to logistical problems or lack of an easy analog. Key problem areas include: dispersal ability, capacity for vegetative spread, germination, palatability, plasticity, and all the various below‐ground traits. Comparative studies need to address these problem areas. The common core list is suggested as a common starting point for studies of functional ecology. The idiosyncrasies of regional floras and specific research agendas will dictate which traits can be ignored and those that need to be added.

The Pacific Centre for Isotopic and Geochemical Research (PCIGR) at the University of British Columbia has undertaken a systematic analysis of the isotopic (Sr, Nd, and Pb) compositions and concentrations of a broad compositional range of U.S. Geological Survey (USGS) reference materials, including basalt (BCR‐1, 2; BHVO‐1, 2), andesite (AGV‐1, 2), rhyolite (RGM‐1, 2), syenite (STM‐1, 2), granodiorite (GSP‐2), and granite (G‐2, 3). USGS rock reference materials are geochemically well characterized, but there is neither a systematic methodology nor a database for radiogenic isotopic compositions, even for the widely used BCR‐1. This investigation represents the first comprehensive, systematic analysis of the isotopic composition and concentration of USGS reference materials and provides an important database for the isotopic community. In addition, the range of equipment at the PCIGR, including a Nu Instruments Plasma MC‐ICP‐MS, a Thermo Finnigan Triton TIMS, and a Thermo Finnigan Element2 HR‐ICP‐MS, permits an assessment and comparison of the precision and accuracy of isotopic analyses determined by both the TIMS and MC‐ICP‐MS methods (e.g., Nd isotopic compositions). For each of the reference materials, 5 to 10 complete replicate analyses provide coherent isotopic results, all with external precision below 30 ppm (2 SD) for Sr and Nd isotopic compositions (27 and 24 ppm for TIMS and MC‐ICP‐MS, respectively). Our results also show that the first‐ and second‐generation USGS reference materials have homogeneous Sr and Nd isotopic compositions. Nd isotopic compositions by MC‐ICP‐MS and TIMS agree to within 15 ppm for all reference materials. Interlaboratory MC‐ICP‐MS comparisons show excellent agreement for Pb isotopic compositions; however, the reproducibility is not as good as for Sr and Nd. A careful, sequential leaching experiment of three first‐ and second‐generation reference materials (BCR, BHVO, AGV) indicates that the heterogeneity in Pb isotopic compositions, and concentrations, could be directly related to contamination by the steel (mortar/pestle) used to process the materials. Contamination also accounts for the high concentrations of certain other trace elements (e.g., Li, Mo, Cd, Sn, Sb, W) in various USGS reference materials.

Abstract Both work engagement and job embeddedness have seen dramatic growth in research interest over the past few years. Briefly, work engagement can be defined as a positive, fulfilling state of mind, most commonly characterized by vigour, dedication, and absorption. Job embeddedness, in contrast, captures components of an individual's attachment to their job and can be said to consist of links, perceptions of person–environment fit, and the sacrifices involved in quitting. Despite some strong similarity in the constructs in their theoretical bases, there has been no attempt to distinguish them empirically. Thus, the primary research question driving this study was whether work engagement and job embeddedness were empirically distinct constructs. Using a sample of US employees from a wide variety of industries and occupations (n=587), their supervisors, and their closest co-worker, we found via confirmatory factor analysis that engagement and embeddedness were unique constructs. Moreover, using usefulness analysis, we found that engagement and embeddedness each shared unique variance with in-role performance and intention to leave. We discuss the implications of these findings relative to work on motivation and attachment and develop practical implications from our findings as well as directions for future research.

It is over twenty years since Jared Diamond focused attention on the possible existence of assembly rules for communities. Since then there has been a proliferation of studies trying to promote, refute or test the idea that there are sets of constraints (rules) on community formation and maintenance (assembly). This timely volume brings together carefully selected contributions which examine the question of the existence and nature of assembly rules with some rigour and in some detail, using both theoretical and empirical approaches in a variety of systems. The result is a balanced treatment which encompasses a wide range of topics within ecology including competition and coexistence, conservation and biodiversity, niche theory, and biogeography. As such it provides much to interest a broad audience of ecologists, while also making an important contribution to the study of community ecology in particular.

BACKGROUND: This article examines the relationship between middle school students' experience with cyberbullying and their level of self-esteem. Previous research on traditional bullying among adolescents has found a relatively consistent link between victimization and lower self-esteem, while finding an inconsistent relationship between offending and lower self-esteem. It is therefore important to extend this body of research by determining how bullying augmented through the use of technology (such as computers and cell phones) is linked to differing levels of self-esteem. METHODS: During March and April 2007, a random sample of 1963 middle school students (mean age 12.6) from 30 schools in one of the largest school districts in the United States completed a self-report survey of Internet use and cyberbullying experiences. RESULTS: This work found that students who experienced cyberbullying, both as a victim and an offender, had significantly lower self-esteem than those who had little or no experience with cyberbullying. CONCLUSIONS: A moderate and statistically significant relationship exists between low self-esteem and experiences with cyberbullying. As such, bullying prevention programs incorporated in school curricula should also include substantive instruction on cyberbullying. Moreover, educators need to intervene in cyberbullying incidents, as failure to do so may impact the ability of students to be successful at school.

We engage in a critical theoretical exercise to extend the boundaries of entrepreneurship theory and research by reframing “entrepreneurship as positive economic activity” to “entrepreneurship as social change.” Reframing entrepreneurship through feminist analytical lenses, we argue that more theoretical frameworks are needed for exploring the varieties of social change that entrepreneurship may bring about. We also discuss what difference this would make in extant entrepreneurship perspectives. Theoretically, methodologically, and analytically, such reframing is the main contribution of this paper.

This research examines the relationships between psychological contract fulfillment and three types of employee behavior: in-role performance, organizational citizenship behavior directed at the organization, and organizational citizenship behavior directed at individuals within the organization. Using a sample of 134 supervisor-subordinate dyads, this study suggests that the extent of psychological contract fulfillment is positively related to the performance of all three types of employee behavior. In addition, the results indicate that psychological contract fulfillment is more strongly related to citizenship behavior directed at the organization than to citizenship behavior directed at one’s colleagues. Finally, this research investigates if employees’ attributions regarding the reasons that psychological contract breach occurred also impact their work performance. However, the data provide only limited support for the idea that employees are most likely to reduce their work effort when they perceive that the organization has intentionally failed to live up to its commitments.

In a number of studies, researchers interested in positive organizational behavior have sought to better understand the favorable aspects of work engagement-a pervasive state of emotional attachment and motivation toward work. In this study, however, we investigate a potentially negative outcome of engagement. Drawing upon conservation of resources theory, we hypothesize that engagement will be associated with higher work interference with family due to the resources engaged employees may expend when they engage in extrarole work behavior such as organizational citizenship behaviors (OCBs). We further propose that conscientiousness, as a personal resource, serves to buffer the relationship between OCB and work interference with family. Examining multisource data, collected at multiple points in time, from 3 diverse samples (total N = 844), we find that state engagement is associated with higher levels of work interference with family and that this relationship is mediated by the performance of OCBs. The findings also indicate that engaged employees who are highly conscientious experience lower levels of work interference with family than engaged employees who are less conscientious. The implications of our study and directions for future research are also discussed.

The degree to which real and hypothetical rewards were discounted across delays ranging from 6 hr to 1 year was explored in a within-subjects design. An adjusting-amounts procedure was used to estimate the subjective value of real and hypothetical rewards at each delay. A hyperbolic discounting function provided a significantly better fit to individual participants' preferences than did an exponential function. No significant effect of reward type on degree of hyperbolic discounting or area under the discounting curves was detected. These findings offer some support for the validity of using hypothetical rewards to estimate discounting rates in substance-abusing and other populations, but caution is suggested because this support is gleaned from a failure to detect an effect of reward type.

Ecological approaches to community assembly have emphasized the interplay between neutral processes, niche-based environmental filtering and niche-based species sorting in an interactive milieu. Recently, progress has been made in terms of aligning our vocabulary with conceptual advances, assessing how trait-based community functional parameters differ from neutral expectation and assessing how traits vary along environmental gradients. Experiments have confirmed the influence of these processes on assembly and have addressed the role of dispersal in shaping local assemblages. Community phylogenetics has forged common ground between ecologists and biogeographers, but it is not a proxy for trait-based approaches. Community assembly theory is in need of a comparative synthesis that addresses how the relative importance of niche and neutral processes varies among taxa, along environmental gradients, and across scales. Towards that goal, we suggest a set of traits that probably confer increasing community neutrality and regionality and review the influences of stress, disturbance and scale on the importance of niche assembly. We advocate increasing the complexity of experiments in order to assess the relative importance of multiple processes. As an example, we provide evidence that dispersal, niche processes and trait interdependencies have about equal influence on trait-based assembly in an experimental grassland.

Abstract As increasing numbers of youth embrace computer-mediated communication to meet academic and social needs, interpersonal violence directly and indirectly related to the Internet is occurring more often. Cyberbullying in particular has shot to the forefront of agendas in schools and communities due to the emotional, psychological, and even physical harm to which victims can be subjected. While previous studies have focused on describing its frequency in an exploratory capacity, the current work seeks to utilize general strain theory to identify the emotional and behavioral effects of cyberbullying victimization. Data collected online from a sample of adolescent Internet-users indicate that cyberbullying is a potent form of strain that may be related to involvement in school problems and delinquent behavior offline. Implications of these findings and suggestions for policy are discussed.

Summary Competitor, stress‐tolerator, ruderal ( CSR ) theory is a prominent plant functional strategy scheme previously applied to local floras. Globally, the wide geographic and phylogenetic coverage of available values of leaf area ( LA ), leaf dry matter content ( LDMC ) and specific leaf area ( SLA ) (representing, respectively, interspecific variation in plant size and conservative vs . acquisitive resource economics) promises the general application of CSR strategies across biomes, including the tropical forests hosting a large proportion of Earth's diversity. We used trait variation for 3068 tracheophytes (representing 198 families, six continents and 14 biomes) to create a globally calibrated CSR strategy calculator tool and investigate strategy–environment relationships across biomes world‐wide. Due to disparity in trait availability globally, co‐inertia analysis was used to check correspondence between a ‘wide geographic coverage, few traits’ data set and a ‘restricted coverage, many traits’ subset of 371 species for which 14 whole‐plant, flowering, seed and leaf traits (including leaf nitrogen content) were available. CSR strategy/environment relationships within biomes were investigated using fourth‐corner and RLQ analyses to determine strategy/climate specializations. Strong, significant concordance ( RV = 0·597; P < 0·0001) was evident between the 14 trait multivariate space and when only LA , LDMC and SLA were used. Biomes such as tropical moist broadleaf forests exhibited strategy convergence (i.e. clustered around a CS / CSR median; C:S:R = 43:42:15%), with CS ‐selection associated with warm, stable situations (lesser temperature seasonality), with greater annual precipitation and potential evapotranspiration. Other biomes were characterized by strategy divergence: for example, deserts varied between xeromorphic perennials such as Larrea divaricata, classified as S‐selected (C:S:R = 1:99:0%) and broadly R‐selected annual herbs (e.g. Claytonia perfoliata ; R/ CR ‐selected; C:S:R = 21:0:79%). Strategy convergence was evident for several growth habits (e.g. trees) but not others (forbs). The CSR strategies of vascular plants can now be compared quantitatively within and between biomes at the global scale. Through known linkages between underlying leaf traits and growth rates, herbivory and decomposition rates, this method and the strategy–environment relationships it elucidates will help to predict which kinds of species may assemble in response to changes in biogeochemical cycles, climate and land use.

Until recently, achieving a reference-quality genome sequence for bread wheat was long thought beyond the limits of genome sequencing and assembly technology, primarily due to the large genome size and > 80% repetitive sequence content. The release of the chromosome scale 14.5-Gb IWGSC RefSeq v1.0 genome sequence of bread wheat cv. Chinese Spring (CS) was, therefore, a milestone. Here, we used a direct label and stain (DLS) optical map of the CS genome together with a prior nick, label, repair and stain (NLRS) optical map, and sequence contigs assembled with Pacific Biosciences long reads, to refine the v1.0 assembly. Inconsistencies between the sequence and maps were reconciled and gaps were closed. Gap filling and anchoring of 279 unplaced scaffolds increased the total length of pseudomolecules by 168 Mb (excluding Ns). Positions and orientations were corrected for 233 and 354 scaffolds, respectively, representing 10% of the genome sequence. The accuracy of the remaining 90% of the assembly was validated. As a result of the increased contiguity, the numbers of transposable elements (TEs) and intact TEs have increased in IWGSC RefSeq v2.1 compared with v1.0. In total, 98% of the gene models identified in v1.0 were mapped onto this new assembly through development of a dedicated approach implemented in the MAGAAT pipeline. The numbers of high-confidence genes on pseudomolecules have increased from 105 319 to 105 534. The reconciled assembly enhances the utility of the sequence for genetic mapping, comparative genomics, gene annotation and isolation, and more general studies on the biology of wheat.