Plant-pollinator data sets which were derived ultimately from Vasquez and
Simberloff, 2003. These are two-trophic level systems that have almost
exactly the same plants and pollinators. Safari is from an
undisturbed area, while Arroyo is from a nearby location grazed by
cattle. In the original publication, the data sets are called Safariland
and Arroyo Goye. See Details for how the original data was converted.
Bryan A. Hanson, DePauw University, Greencastle Indiana USA
These data sets are HivePlotData objects. They were created
from the datasets Safariland and vazarr in the package
bipartite. The process was the same for each: 1. Plants were placed
on one axis, pollinators on the other. 2. A radius was assigned by
calculating d' using function dfun in package bipartite. d'
is an index of specialization; higher values mean the plant or pollinator is
more specialized. 3. Edge weights were assigned proportional to the square
root of the normalized number of visits of a pollinator to a plant. Thus
the width of the edge drawn is an indication of the visitation rate. 4.
The number of visits were divided manually into 4 groups and used to assign
edge colors ranging from white to red. The redder colors represent greater
numbers of visits, and the color-coding is comparable for each data set.