University of Georgia

About: University of Georgia is a education organization based out in Athens, Georgia, United States. It is known for research contribution in the topics: Population & Poison control. The organization has 41934 authors who have published 93622 publications receiving 3713212 citations. The organization is also known as: UGA & Franklin College.

Global patterns in belowground communities.

Abstract: Although belowground ecosystems have been studied extensively and soil biota play integral roles in biogeochemical processes, surprisingly we have a limited understanding of global patterns in belowground biomass and community structure. To address this critical gap, we conducted a meta-analysis of published data (> 1300 datapoints) to compare belowground plant, microbial and faunal biomass across seven of the major biomes on Earth. We also assembled data to assess biome-level patterns in belowground microbial community composition. Our analysis suggests that variation in microbial biomass is predictable across biomes, with microbial biomass carbon representing 0.6-1.1% of soil organic carbon (r(2) = 0.91) and 1-20% of total plant biomass carbon (r(2) = 0.42). Approximately 50% of total animal biomass can be found belowground and soil faunal biomass represents < 4% of microbial biomass across all biomes. The structure of belowground microbial communities is also predictable: bacterial community composition and fungal : bacterial gene ratios can be predicted reasonably well from soil pH and soil C : N ratios respectively. Together these results identify robust patterns in the structure of belowground microbial and faunal communities at broad scales which may be explained by universal mechanisms that regulate belowground biota across biomes.

Managing Successful Organizational Change in the Public Sector

Abstract: C an governmental organizations change? Reform initiatives have swept through governments in the United States and overseas, again and again bringing news about eff orts to reinvent, transform, or reform government agencies ( Barzelay 2001; Kettl 2000; Pollitt and Bouckaert 2000; Stillman 1999 ). Curiously, however, this recurrent theme of change in government agencies has not induced a high volume of articles that explicitly address the topic in public administration journals. # ere are prominent exceptions to this observation (e.g., Bryson and Anderson 2000; Chackerian and Mavima 2000; Mani 1995; Wise 2002 ) and journal articles about topics related to organizational change (e.g., Berman and Wang 2000; Brudney and Wright 2002; Hood and Peters 2004 ). Articles reporting research and theory with titles containing “ organizational change ” and with that theme as a focal topic, however, appear with much less regularity in public administration journals than in research journals focusing on general management and organization theory.

msatcommander: detection of microsatellite repeat arrays and automated, locus-specific primer design

Abstract: msatcommander is a platform-independent program designed to search for microsatellite arrays, design primers, and tag primers using an automated routine. msatcommander accepts as input DNA sequence data in single-sequence or concatenated, fasta-formatted files. Search data and locus-specific primers are written to comma-separated value files for subsequent use in spreadsheet or database programs. Binary versions of the graphical interface for msatcommander are available for Apple OS X and Windows XP. Users of other operating systems may run the graphical interface version using the available source code, provided their environment supports at least Python 2.4, Biopython 1.43, and wxPython 2.8. msatcommander is available from http://code.google.com/p/msatcommander/.

Caterpillar-induced nocturnal plant volatiles repel conspecific females

Abstract: Plants respond to insect herbivory by synthesizing and releasing complex blends of volatile compounds, which provide important host-location cues for insects that are natural enemies of herbivores1,2,3. The effects of these volatile blends on herbivore behaviour have been investigated to only a limited extent4,5, in part because of the assumption that herbivore-induced volatile emissions occur mainly during the light phase of the photoperiod6,7. Because many moths—whose larvae are some of the most important insect herbivores—are nocturnal, herbivore-induced plant volatiles have not hitherto been considered to be temporally available as host-location cues for ovipositing females. Here we present chemical and behavioural assays showing that tobacco plants (Nicotiana tabacum) release herbivore-induced volatiles during both night and day. Moreover, several volatile compounds are released exclusively at night and are highly repellent to female moths (Heliothis virescens). The demonstration that tobacco plants release temporally different volatile blends and that lepidopteran herbivores use induced plant signals released during the dark phase to choose sites for oviposition adds a new dimension to our understanding of the role of chemical cues in mediating tritrophic interactions.

Seriously considering play: Designing interactive learning environments based on the blending of microworlds, simulations, and games

Abstract: Little attention has been given to the psychological and sociological value of play despite its many advantages to guiding the design of interactive multimedia learning environments for children and adults. This paper provides a brief overview of the history, research, and theory related to play. Research from education, psychology, and anthropology suggests that play is a powerful mediator for learning throughout a person's life. The time has come to couple the ever increasing processing capabilities of computers with the advantages of play. The design of hybrid interactive learning environments is suggested based on the constructivist concept of a microworld and supported with elements of both games and simulations.