期刊
ECOLOGY LETTERS
卷 6, 期 5, 页码 405-411出版社
WILEY
DOI: 10.1046/j.1461-0248.2003.00440.x
关键词
allometry; community ecology; plant size; stem diameter
类别
We show that explicit mathematical and biological relationships exist among the scaling exponents and the allometric constants (alpha and beta, respectively) of log-log linear tree-community size frequency distributions, plant density N-T, and minimum, maximum and average stem diameters (D-min, D-max, and (D) over bar, respectively). As individuals grow in size and D-max increases, N-T is predicted to decrease as reflected by a decrease in the numerical value of alpha and an increase in the value of beta. Our derivations further show that N-T decreases as (D) over bar increases even if D-min or D-max remain unchanged. Because D-max and the age of the largest individuals in a community are correlated, albeit weakly, we argue that the interdependent relationships among the numerical values of alpha, beta, N-T, and (D) over bar shed light on the extent to which communities have experienced recent global disturbance. These predicted relationships receive strong statistical support using two large datasets spanning a broad spectrum of tree-dominated communities.
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