Fine Root Productivity and Dynamics on a Forested Floodplain in South Carolina

The highly dynamic, fine-root component of forested wetland ecosystems has received inadequate attention in the literature. Characterizing fine root dynamics is a challenging endeavor in any system, but the difficulties are particularly evident in forested floodplains where frequent hydrologic fluctuations directly influence fine root dynamics. Fine root (\u3c 3mm) biomass, production, and turnover were estimated for three soils exhibiting different drainage patterns within a mixed-oak community on the Coosawhatchie River floodplain, Jasper County, SC. Within a 45-cm deep vertical profile, 74% of total fine root biomass was restricted to the upper 15 cm of the soil surface. Fine root biomass decreased as the soil became less well-drained (e.g., fine root biomass in well-drained soil \u3e intermediately drained soil \u3e poorly drained soil). Fine root productivity was measured for one year using minirhizotrons and in-situ screens. Both methods suggested higher fine root production in better drained soils but showed frequent fluctuations in fine root growth and mortality, suggesting the need for frequent sampling at short intervals (e.g., monthly) to accurately assess fine root growth and turnover. Fine root production, estimated with in-situ screens, was 1.5, 1.8, and 0.9 Mg ha-1 yr-1 in the well-drained, intermediately drained, and poorly drained soils, respectively. Results from minirhizotrons indicated that fine roots in well-drained soils grew to greater depths while fine roots in poorly drained soils were restricted to surface soils. Minirhizotrons also revealed that the distribution of fine roots among morphological classes changed between well-drained and poorly drained soils

POLLUTION LIABILITY INSURANCE AND THE INTERNALIZATION OF ENVIRONMENTAL RISKS

This paper summarizes conceptual and empirical research on the effects of using private insurance as an instrument for regulating the risks of the chemical cycle. The paper reviews the following issues: (1) the institutional choices in regulation activities that may cause latent damage; (2) the insurability of pollution liabilities; and (3) the actual problems with using the pollution liability insurance market as a regulatory tool. Copyright 1986 by The Policy Studies Organization.

Inventive Pathways: Fresh Visions of Sport Management Research

Closed access.Although qualitative research approaches such as ethnography have been applied to the field of sport (e.g., Bricknell, 2001; Hughson and Hallinan, 2001) Sparkes (2003) has suggested that it was not until the late 1990s that sport researchers began to embrace ethnographic frameworks underpinned by critical and postmodern theories. As such, the value of these research designs has not been fully realized. The benefit for sport management researchers in applying critical and postmodern thought to ethnographic approaches is that it sharpens their critical consciousness. This article therefore develops an argument for applying critical and postmodern thought to ethnographic approaches to sport management research. In doing this we (a) provide a brief historical sketch of social science research paradigms; (b) outline the benefits of applying critical and postmodern thought to sport management ethnographic research; (c) present examples of current sport and sport management ethnographic research that applies critical and postmodern frameworks; and (d) provide insight into the concerns that sport management scholars should consider when applying ethnographic research designs that embrace the tenets of postmodernism. Through this discussion we conclude that, although ethnographic approaches inspired by critical and postmodern thought are not the panacea to solve all research problems, if applied correctly they can only further enhance out knowledge of the research issue under investigation