A refined methodology for defining plant communities using post-agricultural data from the Neotropics

TitleA refined methodology for defining plant communities using post-agricultural data from the Neotropics
Publication TypeJournal Article
Year of Publication2012
AuthorsMyster, RW
JournalThe Scientific World Journal
Volume2012
Pagination1-9
Date Published03/2012
Accession NumberLUQ.1041
Abstract

How best to define and quantify plant communities was investigated using long-term plot data sampled from a recovering pasture in Puerto Rico and abandoned sugarcane and banana plantations in Ecuador. Significant positive associations between pairs of old field species were first computed and then clustered together into larger and larger species groups. I found that (1) no pasture or plantation had more than 5% of the possible significant positive associations, (2) clustering metrics showed groups of species participating in similar clusters among the five pasture/plantations over a gradient of decreasing association strength, and (3) there was evidence for repeatable communities-especially after banana cultivation-suggesting that past crops not only persist after abandonment but also form significant associations with invading plants. I then showed how the clustering hierarchy could be used to decide if any two pasture/plantation plots were in the same community, that is, to define old field communities. Finally, I suggested a similar procedure could be used for any plant community where the mechanisms and tolerances of species form the "cohesion" that produces clustering, making plant communities different than random assemblages of species.

URLhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3317650/pdf/TSWJ2012-365409.pdf
DOI10.1100/2012/365409