From rot to riches: Using Silphidae to assess ecosystem function in western Missouri prairies

Carrion is an important component in ecosystems as its decomposition contributes to nutrient cycling, influencing ecosystem function and the structure of communities at different trophic levels. Since decomposition of carrion affects all trophic levels, it can be used as an indicator of ecosystem health. In this study, we focused on invertebrate decomposer assemblages to assess the function of western Missouri prairies, focusing on Silphidae for this presentation. The Missouri Department of Conservation (MDC) has identified areas of the state that are important for biodiversity and designated them as Conservation Opportunity Areas (COAs). Prairies located within COAs were compared to prairies in the surrounding landscape to assess any differences in assemblage structure and ecosystem function. Silphids at each site were sampled using pitfall traps baited with aged small mammal carrion. Two sampling periods (early June, late July) were used to capture and describe change throughout the summer. Initial results show that assemblages north of the Missouri River differed from sites south of the Missouri River. In addition, there appeared to be slight differences between prairies in COAs compared to prairies in the surrounding landscape. This study will further elucidate the connection between invertebrate decomposers communities and their effect on ecosystem function.