Microbial community coalescence and nitrogen cycling in simulated mortality decomposition hotspots

作     者：Sarah W.Keenan Alexandra L.Emmons Jennifer M.DeBruyn Sarah W.Keenan;Alexandra L.Emmons;Jennifer M.DeBruyn

作者机构：Department of Geology and Geological EngineeringSouth Dakota School of Mines and Technology501 East St.Joseph StreetRapidSD 57701USA Department of AnthropologyUniversity of TennesseeKnoxvilleTNUSA Department of Biosystems Engineering and Soil ScienceUniversity of Tennessee2506 E.J.Chapman DriveKnoxvilleTN 37996USA 

出 版 物：《Ecological Processes》 (生态过程（英文）)

年 卷 期：2023年第12卷第1期

页      面：608-624页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：Funding for this research was provided by the National Science Foundation(Award 1549726)to JMD Funding for open access to this research was provided by the University of Tennessee Open Publishing Support Fund 

主　　题：Carcass decomposition Microcosm Nitrogen Carbon Biogeochemical cycling Coalescence 

摘      要：Background The pulsed introduction of dead plant and animal material into soils represents one of the primary mechanisms for returning organic carbon(C)and nitrogen(N)compounds to biogeochemical *** of animal carcasses provides a high C and N resource that stimulates indigenous environmental microbial communities and introduces non-indigenous,carcass-derived microbes to the ***,the dynamics of the coalesced microbial communities,and the relative contributions of environment-and carcass-derived microbes to C and N cycling are *** test whether environment-derived,carcass-derived,or the combined microbial communities exhibited a greater influence on C and N cycling,we conducted controlled laboratory experiments that combined carcass decomposition fluids and soils to simulate carcass decomposition *** selectively sterilized the decomposition fluid and/or soil to remove microbial communities and create different combinations of environment-and carcass-derived communities and incubated the treatments under three temperatures(10,20,and 30℃).Results Carcass-derived bacteria persisted in soils in our simulated decomposition scenarios,albeit at low *** communities had higher respiration rates at 10 and 30℃ compared to soil or carcass communities ***,at higher temperatures,mixed communities had reduced diversity,but higher respiration,suggesting functional *** communities treatments also provided evidence that carcass-associated microbes may be contributing to ammonification and denitrification,but that nitrification is still primarily carried out by native soil *** Our work yields insight into the dynamics of microbial communities that are coalescing during carcass decomposition,and how they contribute to recycling carcasses in terrestrial ecosystems.