دورية أكاديمية
أعرض في EDS

The Functional Significance of Bacterial Predators.

التفاصيل البيبلوغرافية
العنوان: The Functional Significance of Bacterial Predators.
المؤلفون: Hungate BA; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA Bruce.Hungate@nau.edu.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Marks JC; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Power ME; Department of Integrative Biology, University of California Berkeley, Berkeley, California, USA., Schwartz E; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., van Groenigen KJ; Department of Geography, College of Life and Environmental Sciences, University of Exeter, Exeter, United Kingdom., Blazewicz SJ; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA., Chuckran P; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Dijkstra P; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Finley BK; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Firestone MK; Department of Environmental Science, Policy, and Management, University of California, Berkeley, California, USA., Foley M; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Greenlon A; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA., Hayer M; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA., Hofmockel KS; Pacific Northwest National Laboratory, Richland, Washington, USA.; Department of Agronomy, Iowa State University, Ames, Iowa, USA., Koch BJ; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Mack MC; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Mau RL; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Pathogen and Microbiome Institute, Northern Arizona University, Flagstaff, Arizona, USA., Miller SN; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA., Morrissey EM; Division of Plant and Soil Sciences, West Virginia University, Morgantown, West Virginia, USA., Propster JR; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Purcell AM; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA.; Department of Biological Sciences, Northern Arizona University, Flagstaff, Arizona, USA., Sieradzki E; Department of Environmental Science, Policy, and Management, University of California, Berkeley, California, USA., Starr EP; Department of Plant and Microbial Biology, University of California, Berkeley, California, USA., Stone BWG; Center for Ecosystem Science and Society, Northern Arizona University, Flagstaff, Arizona, USA., Terrer C; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA., Pett-Ridge J; Physical and Life Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California, USA.
المصدر: MBio [mBio] 2021 Apr 27; Vol. 12 (2). Date of Electronic Publication: 2021 Apr 27.
نوع المنشور: Journal Article; Research Support, U.S. Gov't, Non-P.H.S.
اللغة: English
بيانات الدورية: Publisher: American Society for Microbiology Country of Publication: United States NLM ID: 101519231 Publication Model: Electronic Cited Medium: Internet ISSN: 2150-7511 (Electronic) NLM ISO Abbreviation: mBio Subsets: MEDLINE
أسماء مطبوعة: Original Publication: Washington, D.C. : American Society for Microbiology
مواضيع طبية MeSH: Bacterial Physiological Phenomena*, Bacteria/*genetics , Bacteria/*growth & development, Animals ; Bacteria/classification ; Bacteria/metabolism ; Bacteriophages ; Carbon/metabolism ; DNA, Bacterial/genetics ; Deltaproteobacteria/genetics ; Deltaproteobacteria/physiology
مستخلص: Predation structures food webs, influences energy flow, and alters rates and pathways of nutrient cycling through ecosystems, effects that are well documented for macroscopic predators. In the microbial world, predatory bacteria are common, yet little is known about their rates of growth and roles in energy flows through microbial food webs, in part because these are difficult to quantify. Here, we show that growth and carbon uptake were higher in predatory bacteria compared to nonpredatory bacteria, a finding across 15 sites, synthesizing 82 experiments and over 100,000 taxon-specific measurements of element flow into newly synthesized bacterial DNA. Obligate predatory bacteria grew 36% faster and assimilated carbon at rates 211% higher than nonpredatory bacteria. These differences were less pronounced for facultative predators (6% higher growth rates, 17% higher carbon assimilation rates), though high growth and carbon assimilation rates were observed for some facultative predators, such as members of the genera Lysobacter and Cytophaga , both capable of gliding motility and wolf-pack hunting behavior. Added carbon substrates disproportionately stimulated growth of obligate predators, with responses 63% higher than those of nonpredators for the Bdellovibrionales and 81% higher for the Vampirovibrionales , whereas responses of facultative predators to substrate addition were no different from those of nonpredators. This finding supports the ecological theory that higher productivity increases predator control of lower trophic levels. These findings also indicate that the functional significance of bacterial predators increases with energy flow and that predatory bacteria influence element flow through microbial food webs. IMPORTANCE The word "predator" may conjure images of leopards killing and eating impala on the African savannah or of great white sharks attacking elephant seals off the coast of California. But microorganisms are also predators, including bacteria that kill and eat other bacteria. While predatory bacteria have been found in many environments, it has been challenging to document their importance in nature. This study quantified the growth of predatory and nonpredatory bacteria in soils (and one stream) by tracking isotopically labeled substrates into newly synthesized DNA. Predatory bacteria were more active than nonpredators, and obligate predators, such as Bdellovibrionales and Vampirovibrionales , increased in growth rate in response to added substrates at the base of the food chain, strong evidence of trophic control. This work provides quantitative measures of predator activity and suggests that predatory bacteria-along with protists, nematodes, and phages-are active and important in microbial food webs.
(Copyright © 2021 Hungate et al.)
التعليقات: Comment in: Nat Rev Microbiol. 2021 Jul;19(7):406. (PMID: 33986534)
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فهرسة مساهمة: Keywords: 18O-H2O; Bdellovibrio; food webs; predator; qSIP; stable isotope probing; top-down control; trophic interactions
المشرفين على المادة: 0 (DNA, Bacterial)
7440-44-0 (Carbon)
تواريخ الأحداث: Date Created: 20210428 Date Completed: 20211007 Latest Revision: 20240401
رمز التحديث: 20240401
مُعرف محوري في PubMed: PMC8092244
DOI: 10.1128/mBio.00466-21
PMID: 33906922
قاعدة البيانات: MEDLINE
الوصف
تدمد:2150-7511
DOI:10.1128/mBio.00466-21