The Effect Of Bacterial And Fungal Presence On Bacterial Growth Dynamics ( Holden And Treseder 2014 )

2220 Words Apr 8th, 2016 9 Pages
Rationale and Background.
To date, the majority of microbiological study of soils have centered on bacterial and fungal presence in the context of plant mutualism [Figure 2]. Additionally, analyses of microbial biomass have typically utilized indirect models, such as change in soil carbon levels, as a measurement of microbial growth dynamics (Holden and Treseder 2014). When emphasizing ecological roles of microbes as nutrient cyclers, this is a useful methodology. However, it has led to a void in understanding of viral significance in these systems as well as a lack of detailed species-level identifications of bacterial and viral communities prior to and after fire events. The few abundance assays completed regarding bacteria in soil indicate that one gram of soil contains 108 to 109 bacteria and 109 to 1010 viruses (Williamson 2005, Van Der Heijden et al. 2008). This incredibly high number necessitates additional research, if only due to the fact that these organisms numerically overwhelm the system (Van Der Heijden et al. 2008). It would be irresponsible to ignore such a significant portion of the environment and attempt to come to ideal land management practices. It has become clear from even the broad scale respiration and nutrient assays completed that bacterial and viral communities are not a monolith; in different locations, phylogenetic community composition varies strongly (Williamson 2005, Goberna et al. 2015, Wang et al. 2015, Tas et al. 2014, Dooley and…
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