Investigations in commonness and rarity: a comparative analysis of co-occurring, congeneric Mexican trees

Citation
Ck. Kelly et al., Investigations in commonness and rarity: a comparative analysis of co-occurring, congeneric Mexican trees, ECOL LETT, 4(6), 2001, pp. 618-627
Citations number
56
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Environment/Ecology
Journal title
ECOLOGY LETTERS
ISSN journal
1461-023X → ACNP
Volume
4
Issue
6
Year of publication
2001
Pages
618 - 627
Database
ISI
SICI code
1461-023X(200111)4:6<618:IICARA>2.0.ZU;2-K
Abstract
Population size distributions were examined for 12 species of trees co-occu rring at Chamela Biological Station in Jalisco, Mexico. Species had been se lected as congeneric pairs and trios similar in gross morphology and ecolog y in order better to identify correlates of relative abundance. Rarer speci es were found unanimously to have more irregular distributions of individua ls among size classes than more common species when distributions were comp ared to a smooth, descending curve constructed from population mean stem di ameters (an exponential distribution). Examination among species of pattern s of deviation from these corresponding smooth distributions indicates that the most reasonably inferred cause for the observed pattern is consistent differences in degree of fluctuation in recruitment into adult size classes . These results thereby suggest a demographic difference between locally ra rer and more common species that may be generally associated with observed differences in relative abundance and indicate a focus for management of ra rity in forest trees.