University of New Hampshire

About: University of New Hampshire is a education organization based out in Durham, New Hampshire, United States. It is known for research contribution in the topics: Population & Solar wind. The organization has 9379 authors who have published 24025 publications receiving 1020112 citations. The organization is also known as: UNH.

Modeling reciprocal team cohesion-performance relationships, as impacted by shared leadership and members' competence.

Abstract: Despite the lengthy history of team cohesion-performance research, little is known about their reciprocal relationships over time. Using meta-analysis, we synthesize findings from 17 CLP design studies, and analyze their results using SEM. Results support that team cohesion and performance are related reciprocally with each other over time. We then used longitudinal data from 205 members of 57 student teams who competed in a complex business simulation over 10 weeks, to test: (a) whether team cohesion and performance were related reciprocally over multiple time periods, (b) the relative magnitude of those relationships, and (c) whether they were stable over time. We also considered the influence of team members' academic competence and degree of shared leadership on these dynamics. As anticipated, cohesion and performance were related positively, and reciprocally, over time. However, the cohesion → performance relationship was significantly higher than the performance → cohesion relationship. Moreover, the cohesion → performance relationship grew stronger over time whereas the performance → cohesion relationship remained fairly consistent over time. As expected, shared leadership related positively to team cohesion but not directly to their performance; whereas average team member academic competence related positively to team performance but was unrelated to team cohesion. Finally, we conducted and report a replication using a second sample of students competing in a business simulation. Our earlier substantive relationships were mostly replicated, and we illustrated the dynamic temporal properties of shared leadership. We discuss these findings in terms of theoretical importance, applied implications, and directions for future research.

Scale dependent effects of biotic resistance to biological invasion

Abstract: As nonindigenous species continue to displace native species and disrupt ecosystems, understanding the degree to which native species richness affects the vulner- ability of communities to nonindigenous species invasions has grown in importance. Native and exotic species diversity are often positively correlated in large-scale observational studies, but negatively correlated in small-scale experimental studies. This discrepancy suggests that the scale of invasion studies may be an important influence on their outcomes. Using a competition-based model that exhibits a negative relationship on a small scale, we show that changes in the number of available resources across communities can cause invasion success to become positively correlated with native species diversity at larger scales. The strength of the positive correlation, however, depends on the relationship be- tween niche breadth and species diversity in natural communities. Adding species to a community or removing resources has a similar effect—increasing the sum of interspecific interaction strengths, which decreases invasion success.

Humor and group effectiveness

Abstract: Despite the importance of groups in the workplace and the demand from workers for a fun work environment, there is no model that explains how successful organizational humor can impact work groups. The purpose of this article is to present a model, based on Hackman's framework of group effectiveness, that can be used to understand the relationship between successful organizational humor and group effectiveness. We explore the ability of successful organizational humor to influence groups through its positive impact on group productivity, viability and learning. Based on the literature from several disciplines, we propose that successful organizational humor can have a positive impact on a variety of group processes (e.g. effective communication, development of group goals, management of emotion, etc.) and outcomes (e.g. group productivity, group viability, and development of group members), which contribute to overall group effectiveness. The model has the potential to both advance theory on organizationa...

The 2010 spring drought reduced primary productivity in southwestern China

Abstract: Many parts of the world experience frequent and severe droughts. Summer drought can significantly reduce primary productivity and carbon sequestration capacity. The impacts of spring droughts, however, have received much less attention. A severe and sustained spring drought occurred in southwestern China in 2010. Here we examine the influence of this spring drought on the primary productivity of terrestrial ecosystems using data on climate, vegetation greenness and productivity. We first assess the spatial extent, duration and severity of the drought using precipitation data and the Palmer drought severity index. We then examine the impacts of the drought on terrestrial ecosystems using satellite data for the period 2000?2010. Our results show that the spring drought substantially reduced the enhanced vegetation index (EVI) and gross primary productivity (GPP) during spring 2010 (March?May). Both EVI and GPP also substantially declined in the summer and did not fully recover from the drought stress until August. The drought reduced regional annual GPP and net primary productivity (NPP) in 2010 by 65 and 46?Tg?C?yr?1, respectively. Both annual GPP and NPP in 2010 were the lowest over the period 2000?2010. The negative effects of the drought on annual primary productivity were partly offset by the remarkably high productivity in August and September caused by the exceptionally wet conditions in late summer and early fall and the farming practices adopted to mitigate drought effects. Our results show that, like summer droughts, spring droughts can also have significant impacts on vegetation productivity and terrestrial carbon cycling.

Synthesis and Characterization of Cross-Bridged Cyclams and Pendant-Armed Derivatives and Structural Studies of Their Copper(II) Complexes

Abstract: A series of 1,4,8,11-tetraazabicyclo[6.6.2]hexadecane ligands, including the parent compound, N,N‘-dialkyl variants, and the first N,N‘-di-pendant-arm derivatives have been synthesized by a short, efficient, and conceptually novel approach. Their copper(II) complexes have been prepared, and four of these were structurally characterized by X-ray diffraction. In all four complexes, the cross-bridged tetraamine ligand was found to be cis-folded, coordinating the metal cation within its molecular cleft using all four nitrogen lone pairs. Geometries intermediate between idealized square pyramidal and trigonal bipyramidal coordination were found for three of the complexes, whereas a distorted octahedral copper coordination was found for the complex of a di-pendant-arm cross-bridged cyclam.