Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An individual-based predator-prey model for biological coevolution:
  Fluctuations, stability, and community structure   We study an individual-based predator-prey model of biological coevolution,
using linear stability analysis and large-scale kinetic Monte Carlo
simulations. The model exhibits approximate 1/f noise in diversity and
population-size fluctuations, and it generates a sequence of quasi-steady
communities in the form of simple food webs. These communities are quite
resilient toward the loss of one or a few species, which is reflected in
different power-law exponents for the durations of communities and the
lifetimes of species. The exponent for the former is near -1, while the latter
is close to -2. Statistical characteristics of the evolving communities,
including degree (predator and prey) distributions and proportions of basal,
intermediate, and top species, compare reasonably with data for real food webs.

24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph