Appendix A from C. L. Parr et al., “Constraint and Competition in Assemblages: A Cross-Continental and Modeling Approach for Ants”
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چکیده
In these simulations, there were no rules restricting the number of ants at baits; thus, no structuring mechanism is implied. Individuals were assigned to species using all three (even, skewed, and realistic) abundance frequency distributions. In model Null 1, for a species to be classified as dominant, it had to meet both the abundance and monopolization dominance descriptors. In Null 2a and Null 3, a species was classified as a dominant based only on the mean abundance threshold (i.e., a species was classified as dominant if it had a mean abundance score of 13.2, but monopolization was not considered). In Null 2b, a species was classified as a dominant based only on the percentage of baits that were monopolized (i.e., a dominant species had to monopolize 122.9% of baits where it occurred, but the mean abundance score was not considered). Ants were assigned to baits using either a random, even bait distribution or a Poisson distribution (see table 1). Model Null 2a had an even bait distribution, while Null 3 had a Poisson bait distribution, and the number of baits occupied was limited to simulate vacant baits observed in the field (i.e., varying bait occupancy).
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Constraint and competition in assemblages: a cross-continental and modeling approach for ants.
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