Biology – Quantitative Biology – Populations and Evolution
Scientific paper
2010-01-26
Phys. Rev. E 81, 041908 (2010)
Biology
Quantitative Biology
Populations and Evolution
Scientific paper
10.1103/PhysRevE.81.041908
We study the effects of demographic stochasticity on the long-term dynamics of biological coevolution models of community assembly. The noise is induced in order to check the validity of deterministic population dynamics. While mutualistic communities show little dependence on the stochastic population fluctuations, predator-prey models show strong dependence on the stochasticity, indicating the relevance of the finiteness of the populations. For a predator-prey model, the noise causes drastic decreases in diversity and total population size. The communities that emerge under influence of the noise consist of species strongly coupled with each other and have stronger linear stability around the fixed-point populations than the corresponding noiseless model. The dynamics on evolutionary time scales for the predator-prey model are also altered by the noise. Approximate $1/f$ fluctuations are observed with noise, while $1/f^{2}$ fluctuations are found for the model without demographic noise.
Ito Nobuyasu
Murase Yohsuke
Rikvold Per Arne
Shimada Takashi
No associations
LandOfFree
Effects of demographic stochasticity on biological community assembly on evolutionary time scales does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Effects of demographic stochasticity on biological community assembly on evolutionary time scales, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effects of demographic stochasticity on biological community assembly on evolutionary time scales will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-643906