ABSTRACT: Non-targeted LC-MS/MS analysis of PPL extracts from marine community metabolomes from the California Current Ecosystem, collected in June 2017.
Project description:Non-targeted LC-MS/MS analysis of PPL extracts from marine community metabolomes from the California Current Ecosystem, collected in summer 2019
Project description:Function Metabolomics (Native Spray + Metal Addition) of selecteted seawater samples (PPL extracts) from the California Current Ecosystems collected during 1706 LTER cruise.
Project description:Function Metabolomics (Native Spray + Metal Addition) of selecteted surface seawater samples (PPL extracts) from Cycle 1 and 2 from the California Current Ecosystems collected during 1706 LTER cruise.
Project description:Fire is a crucial event regulating the structure and functioning of many ecosystems. Yet few studies focused on how fire affects both the taxonomic and functional diversity of soil microbial communities, along with plant diversity and soil carbon (C) and nitrogen (N) dynamics. Here, we analyze these effects for a grassland ecosystem 9-months after an experimental fire at the Jasper Ridge Global Change Experiment (JRGCE) site in California, USA. Fire altered soil microbial communities considerably, with community assembly process analysis indicating that environmental selection pressure was higher in burned sites. However, a small subset of highly connected taxa were able to withstand the disturbance. In addition, fire decreased the relative abundances of most genes associated with C degradation and N cycling, implicating a slow-down of microbial processes linked to soil C and N dynamics. In contrast, fire stimulated plant growth, likely enhancing plant-microbe competition for soil inorganic N. To synthesize our findings, we performed structural equation modeling, which showed that plants but not microbial communities were responsible for the significantly higher soil respiration rates in burned sites. In conclusion, fire is well-documented to considerable alter the taxonomic and functional composition of soil microorganisms, along with the ecosystem functioning, thus arousing feedback of ecosystem responses to affect global climate.