Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Integrating Theory and Experiment to Explain the Breakdown of Population
  Synchrony in a Complex Microbial Community   We consider the extension of the `Moran effect', where correlated noise
generates synchrony between isolated single species populations, to the study
of synchrony between populations embedded in multi-species communities. In
laboratory experiments on complex microbial communities, comprising both
predators (protozoa) and prey (bacteria), we observe synchrony in abundances
between isolated replicates. A breakdown in synchrony occurs for both predator
and prey as the reactor dilution rate increases, which corresponds to both an
increased rate of input of external resources and an increased effective
mortality though washout. The breakdown is more rapid, however, for the lower
trophic level. We can explain this phenomenon using a mathematical framework
for determining synchrony between populations in multi-species communities at
equilibrium. We assume that there are multiple sources of environmental noise
with different degrees of correlation that affect the individual species
population dynamics differently. The deterministic dynamics can then influence
the degree of synchrony between species in different communities. In the case
of a stable equilibrium community synchrony is controlled by the eigenvalue
with smallest negative real part. Intuitively fluctuations are minimally damped
in this direction. We show that the experimental observations are consistent
with this framework but only for multiplicative noise.

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The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: nlin
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The categories of this paper are: hep-lat
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-fin
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The categories of this paper are: cond-mat