Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolutionary ecology in-silico:evolving foodwebs, migrating population
  and speciation   We have generalized our ``unified'' model of evolutionary ecology by taking
into account the possible movements of the organisms from one ``patch'' to
another within the same eco-system. We model the spatial extension of the
eco-system (i.e., the geography) by a square lattice where each site
corresponds to a distinct ``patch''. A self-organizing hierarchical food web
describes the prey-predator relations in the eco-system. The same species at
different patches have identical food habits but differ from each other in
their reproductive characteristic features. By carrying out computer
simulations up to $10^9$ time steps, we found that, depending on the values of
the set of parameters, the distribution of the lifetimes of the species can be
either exponential or a combination of power laws. Some of the other features
of our ``unified'' model turn out to be robust against migration of the
organisms.

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The categories of this paper are: cmp-lg
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph