Vazquez & Simberloff (2002)

General information

This paper analyzes the relationship between the degree of specialization of plant and pollinator species and their response to disturbance caused by introduced cattle. The study was conducted in four grazed and four ungrazed sites in and around Nahuel Huapi National Park and surrounding areas in Rio Negro, Argentina from September 1999 to Feburary 2000. For each site, the plant-pollinator interaction network was described. 

Data type

The authors recorded their data by counting the number of visits of each flower visitor species to each plant species. Data are presented as an interaction frequency matrix, in which cells with positive integers indicate the frequency of interaction between a pair of species, and cells with zeros indicate no interaction.


Vázquez, D. P. 2002. Interactions among Introduced Ungulates, Plants, and Pollinators: A Field Study in the Temperate Forest of the Southern Andes. Doctoral Dissertation thesis, University of Tennessee, Knoxville, Tennessee, USA.

Vázquez, D. P., and D. Simberloff. 2002. Ecological specialization and susceptibility to disturbance: conjectures and refutations. American Naturalist 159:606-623.

Vázquez, D. P., and D. Simberloff. 2003. Changes in interaction biodiversity induced by an introduced ungulate. Ecology Letters 6: 1077-1083. 

Data files

Text format: interaction matrix (no species names) for sites Arroyo Goye, Cerro Lopez, Llao Llao, Mascardi (nc), Mascardi (c), Safariland, Quetrihue (nc), and Quetrihue (c).

Excel format (includes species lists): interaction matrices for all sites

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