Interacting slow and fast dynamics in precise spiking-bursting neurons

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Future marine zooplankton research - a perspective

During the Second Marine Zooplankton Colloquium (MZC2) 3 issues were added to those developed 11 yr ago during the First Marine Zooplankton Colloquium (MZC1). First, we focused on hot spots, i.e., locations where zooplankton occur in higher than regular abundance and/or operate at higher rates. We should be able to determine the processes leading to such aggregations and rates, and quantify their persistence. Second, information on the level of individual species, even of highly abundant ones, is limited. Concerted efforts should be undertaken with highly abundant to dominant species or genera (e.g., Oithona spp., Calanus spp., Oikopleura spp., Euphausia superba) to determine what governs their abundance and its variability. Third, zooplankton clearly influence biogeochemical cycling in the ocean, but our knowledge of the underlying processes remains fragmentary. Therefore a thorough assessment of variables that still need to be quantified is required to obtain an understanding of zooplankton contributions to biogeochemical cycling. Combining studies on the 7 issues from MZC1 with the 3 from MZC2 should eventually lead to a comprehensive understanding of (1) the mechanisms governing the abundance and existence of dominant zooplankton taxa, and (2) the control of biodiversity and biocomplexity, for example, in the tropical ocean where diversity is high. These recommendations come from an assemblage of chemical, physical and biological oceanographers with experience in major interdisciplinary studies, including modeling. These recommendations are intended to stimulate efforts within the oceanographic community to facilitate the development of predictive capabilities for major biological processes in the ocean

Individual and contextual influences on the affective commitment of retail salespeople

Salesperson characteristics as well as managerial approaches have been found to play an important role in the development of positive attitudes by salespersons towards an organisation. This study integrates these two research areas to investigate the personal and contextual antecedents of affective organisational commitment of retail salespeople. Fit theory and the literature on person-situation interaction provide the theoretical basis for explaining how salesperson selling skills, job liking and empowerment individually and jointly influence affective commitment. A multilevel modelling approach is used to analyse data from 105 sales managers and 419 salespeople. Findings reveal that salespersons&rsquo; affective commitment is influenced by their selling skills, degree of job liking, tenure and empowerment. The results also indicate that the impact of selling skills on affective commitment is higher when empowerment is high. Based on the study&rsquo;s findings, implications for managing salespeople as well as limitations and suggestions for future research are offered.</p