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Tytuł pozycji:

Temporal and Spatial Impact of Human Cadaver Decomposition on Soil Bacterial and Arthropod Community Structure and Function.

Tytuł :
Temporal and Spatial Impact of Human Cadaver Decomposition on Soil Bacterial and Arthropod Community Structure and Function.
Autorzy :
Singh B; Department of Forensic Sciences, Virginia Commonwealth University, Richmond, VA, United States.
Minick KJ; Department of Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, United States.
Strickland MS; Department of Soil and Water Systems, University of Idaho, Moscow, ID, United States.
Wickings KG; Department of Entomology, Cornell University, Geneva, NY, United States.
Crippen TL; Southern Plains Agricultural Research Center, Agricultural Research Service, United States Department of Agriculture, College Station, TX, United States.
Tarone AM; Department of Entomology, Texas A&M University, College Station, TX, United States.
Benbow ME; Department of Entomology and Department of Osteopathic Medical Specialties, Michigan State University, East Lansing, MI, United States.
Sufrin N; Bode Cellmark Forensics, Lorton, VA, United States.
Tomberlin JK; Department of Entomology, Texas A&M University, College Station, TX, United States.
Pechal JL; Department of Entomology, Michigan State University, East Lansing, MI, United States.
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Źródło :
Frontiers in microbiology [Front Microbiol] 2018 Jan 04; Vol. 8, pp. 2616. Date of Electronic Publication: 2018 Jan 04 (Print Publication: 2017).
Typ publikacji :
Journal Article
Język :
Imprint Name(s) :
Original Publication: Lausanne : Frontiers Research Foundation
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Contributed Indexing :
Keywords: decomposition ecology; grave soil; postmortem interval; soil arthropods; soil biodiversity; soil microbiology
Entry Date(s) :
Date Created: 20180123 Latest Revision: 20200928
Update Code :
PubMed Central ID :
Czasopismo naukowe
As vertebrate carrion decomposes, there is a release of nutrient-rich fluids into the underlying soil, which can impact associated biological community structure and function. How these changes alter soil biogeochemical cycles is relatively unknown and may prove useful in the identification of carrion decomposition islands that have long lasting, focal ecological effects. This study investigated the spatial (0, 1, and 5 m) and temporal (3-732 days) dynamics of human cadaver decomposition on soil bacterial and arthropod community structure and microbial function. We observed strong evidence of a predictable response to cadaver decomposition that varies over space for soil bacterial and arthropod community structure, carbon (C) mineralization and microbial substrate utilization patterns. In the presence of a cadaver (i.e., 0 m samples), the relative abundance of Bacteroidetes and Firmicutes was greater, while the relative abundance of Acidobacteria, Chloroflexi, Gemmatimonadetes, and Verrucomicrobia was lower when compared to samples at 1 and 5 m. Micro-arthropods were more abundant (15 to 17-fold) in soils collected at 0 m compared to either 1 or 5 m, but overall, micro-arthropod community composition was unrelated to either bacterial community composition or function. Bacterial community structure and microbial function also exhibited temporal relationships, whereas arthropod community structure did not. Cumulative precipitation was more effective in predicting temporal variations in bacterial abundance and microbial activity than accumulated degree days. In the presence of the cadaver (i.e., 0 m samples), the relative abundance of Actinobacteria increased significantly with cumulative precipitation. Furthermore, soil bacterial communities and C mineralization were sensitive to the introduction of human cadavers as they diverged from baseline levels and did not recover completely in approximately 2 years. These data are valuable for understanding ecosystem function surrounding carrion decomposition islands and can be applicable to environmental bio-monitoring and forensic sciences.

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