Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2001-07-12
Physics
Condensed Matter
Statistical Mechanics
In press, Philosophical Transactions, B
Scientific paper
We consider statistical patterns of variation in growth rates for over 400 species of breeding birds across North America surveyed from 1966 to 1998. We report two results. First, the standard deviation of population growth rates decays as a power-law function of total population size with an exponent $\beta = 0.36\pm0.02$. Second, the number of subpopulations, measured as the number of survey locations with non-zero counts, scales to the 3/4-power of total number of birds counted in a given species. We show how these patterns may be related, and discuss a simple stochastic growth model for a geographically subdivided population that formalizes the relationship. We also examine reasons that may explain why some species deviate from these scaling-laws.
Amaral Luis A. N.
Buldyrev Sergey V.
Keitt Timothy H.
Stanley Eugene H.
No associations
LandOfFree
Scaling in the growth of geographically subdivided populations: invariant patterns from a continent-wide biological survey 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 Scaling in the growth of geographically subdivided populations: invariant patterns from a continent-wide biological survey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Scaling in the growth of geographically subdivided populations: invariant patterns from a continent-wide biological survey will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-140880