Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Influence of technological progress and renewability on the
  sustainability of ecosystem engineers populations   Overpopulation and environmental degradation due to inadequate resource-use
are outcomes of human's ecosystem engineering that has profoundly modified the
world's landscape. Despite the age-old concern that unchecked population and
economic growth may be unsustainable, the prospect of societal collapse remains
contentious today. Contrasting with the usual approach to modeling human-nature
interactions, which are based on the Lotka-Volterra predator-prey model with
humans as the predators and nature as the prey, here we address this issue
using a discrete-time population dynamics model of ecosystem engineers. The
growth of the population of engineers is modeled by the Beverton-Holt equation
with a density-dependent carrying capacity that is proportional to the number
of usable habitats. These habitats (e.g., farms) are the products of the work
of the individuals on the virgin habitats (e.g., native forests), hence the
denomination engineers of ecosystems to those agents. The human-made habitats
decay into degraded habitats, which eventually regenerate into virgin habitats.
For slow regeneration resources, we find that the dynamics is dominated by
cycles of prosperity and collapse, in which the population reaches vanishing
small densities. However, increase of the efficiency of the engineers to
explore the resources eliminates the dangerous cyclical patterns of feast and
famine and leads to a stable equilibrium that balances population growth and
resource availability. This finding supports the viewpoint of growth optimists
that technological progress may avoid collapse.

26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
25
The categories of this paper are: patt-sol
16
The categories of this paper are: stat
2
The categories of this paper are: math
20
The categories of this paper are: acc-phys