globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1901055116
论文题名:
Homeorhesis and ecological succession quantified in synthetic microbial ecosystems
作者: Chuang J.S.; Frentz Z.; Leibler S.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2019
卷: 116, 期:30
起始页码: 14852
结束页码: 14861
语种: 英语
英文关键词: Contingency and determinism ; Ecological succession ; Microbial ecology
Scopus关键词: alga ; article ; ciliate ; community succession ; ecology ; ecosystem ; fluorescence microscopy ; noise ; nonhuman
英文摘要: The dynamics of ecological change following a major perturbation, known as succession, are influenced by random processes. Direct quantitation of the degree of contingency in succession requires chronological study of replicate ecosystems. We previously found that population dynamics in carefully controlled, replicated synthetic microbial ecosystems were strongly deterministic over several months. Here, we present simplified, two-species microbial ecosystems consisting of algae and ciliates, imaged in toto at single-cell resolution with fluorescence microscopy over a period of 1 to 2 weeks. To directly study succession in these ecosystems, we deliberately varied the initial cell abundances over replicates and quantified the ensuing dynamics. The distribution of abundance trajectories rapidly converged to a nearly deterministic path, with small fluctuations, despite variations in initial conditions, environmental perturbations, and intrinsic noise, indicative of homeorhesis. Homeorhesis was also observed for certain phenotypic variables, such as partitioning of the ciliates into distinct size classes and clumping of the algae. Although the mechanism of homeorhesis observed in these synthetic ecosystems remains to be elucidated, it is clear that it must emerge from the ways each species controls its own internal states, with respect to a diverse set of environmental conditions and ecological interactions. © 2019 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/162279
Appears in Collections:气候变化与战略

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作者单位: Chuang, J.S., Laboratory of Living Matter, Center for Studies of Physics and Biology, Rockefeller University, New York, NY 10065, United States; Frentz, Z., Laboratory of Living Matter, Center for Studies of Physics and Biology, Rockefeller University, New York, NY 10065, United States, Department of Microbiology and Immunology, College of Physicians and Surgeons, Columbia University, New York, NY 10032, United States; Leibler, S., Laboratory of Living Matter, Center for Studies of Physics and Biology, Rockefeller University, New York, NY 10065, United States, Simons Center for Systems Biology, Institute for Advanced Study, Princeton, NJ 08540, United States

Recommended Citation:
Chuang J.S.,Frentz Z.,Leibler S.. Homeorhesis and ecological succession quantified in synthetic microbial ecosystems[J]. Proceedings of the National Academy of Sciences of the United States of America,2019-01-01,116(30)
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