How do we know if a species is heading towards extinction? Demographics help us understand the size, status, and behavior of populations. Broadly defined, demography is the study of the ...

While the daily ebb and flow of people across a city might seem chaotic, new research reveals underlying universal patterns.

Positive density dependence in survivorship due ... Allee dynamics and the spread of invading organisms. Theoretical Population Biology 43, 141–158 (1993). Lockwood, J. L., ...