The American Revolution

An exhibition with selected rare books and manuscripts in honor of Bicentennial of American Revolution Rare Book Room, Linderman Library Lehigh University 1975-197

Century I: Lehigh University Rare Book Collection

Exhibition with the selected titles from the Rare Book Collection of Lehigh University representing the first century of the Linderman Library (1878-1977) April 197

Website Atmospherics: Motivators Or Hygiene Factors?

Frederick Herzberg's two-factor theory is once again resurrected and used to frame hypothesized influences on internet shopper satisfaction (and dissatisfaction).   Previous research investigating the influence of web site design and web site atmospherics is discussed with respect to the theory.  Exploratory factor analysis is then used to extract a four-factor solution of internet shopper satisfaction, and interpreted with respect to Herzberg’s model.  Risk and User Friendliness related variables are interpreted as hygiene factors, or dissatisfiers, while Enjoyment and Price variables better explain shopper satisfaction, or motivation.  The ensuing discussion compares the usefulness of this model with empirically validated satisfaction paradigms in explaining the relationship between internet shopper satisfaction and web site atmospherics.&nbsp

The David and Jeannette Green Collection of Limited Editions Club Publications

The David and Jeannette Green Collection of Limited Editions Club Publications at the Lehigh University Libraries November 1981 Bethlehem, Pennsylvani

The Royal Society, 1660-1960

The Royal Society, 1660-1960 An Exhibition of Rare Books The Library, Lehigh University, November 196

Nicolaus Copernicus, 1473-1973

Nicolaus Copernicus, 1473-1973 His Revolutions and His Revolution Catalogue of and Exhibition of Manuscripts and Books With an Historical Essay by Seymour L. Chapin Linderman Library, Lehigh University Bethlehem, Pennsylvania : September-November 197

The Great South Sea

The Great South Sea: An Exhibition of rare Books and Watercolors Rare Book Room, The Library Lehigh University, October-December 196

A Centennial Exhibition

Includes the short history of Lehigh University library and the rare book collection and the highlights in the collection

Plant-soil feedbacks promote coexistence and resilience in multi-species communities

Both ecological theory and empirical evidence suggest that negative frequency dependent feedbacks structure plant communities, but integration of these findings has been limited. Here we develop a generic model of frequency dependent feedback to analyze coexistence and invasibility in random theoretical and real communities for which frequency dependence through plant-soil feedbacks (PSFs) was determined empirically. We investigated community stability and invasibility by means of mechanistic analysis of invasion conditions and numerical simulations. We found that communities fall along a spectrum of coexistence types ranging from strict pair-wise negative feedback to strict intransitive networks. Intermediate community structures characterized by partial intransitivity may feature “keystone competitors” which disproportionately influence community stability. Real communities were characterized by stronger negative feedback and higher robustness to species loss than randomly assembled communities. Partial intransitivity became increasingly likely in more diverse communities. The results presented here theoretically explain why more diverse communities are characterized by stronger negative frequency dependent feedbacks, a pattern previously encountered in observational studies. Natural communities are more likely to be maintained by strict negative plant-soil feedback than expected by chance, but our results also show that community stability often depends on partial intransitivity. These results suggest that plant-soil feedbacks can facilitate coexistence in multi-species communities, but that these feedbacks may also initiate cascading effects on community diversity following from single-species loss.DEB - 0919434, DEB - 1050237, DEB-1556664, DEB-173804