DOI: 10.5061/dryad.wwpzgmsxj
title: Data from: Attractiveness of exotic invasive plants can disconnect native plants from their floral visitors

description: Exotic invasive plant species (EIP) threaten ecosystem diversity and
 stability through competition for abiotic resources with native plant
 species. They can also compete for pollinators, as native floral visitors
 can incorporate EIP floral resources (i.e., pollen and nectar) in their
 diets, potentially shifting their foraging behaviour away from the native
 flora. To decipher how EIP attract native floral visitors and the
 potential competition between EIP and native plants for pollinators, we
 focused on five major exotic invasive plant species in Europe: Buddleja
 davidii, Impatiens glandulifera, Reynoutria japonica, Robinia pseudoacacia
 and Senecio inaequidens. We recorded in 16 sites in Belgium: (i) EIP
 floral visitors, (ii) EIP pollen carried by these visitors, and (iii)
 pollen from native plant species on these visitors. We showed that bees
 were the dominant visitors and pollen vectors for Impatiens glandulifera,
 Robinia pseudoacacia, and Buddleja davidii; hoverflies were the primary
 visitors for Senecio inaequidens; and non-hoverfly flies, alongside bees,
 were the most frequent visitors for Reynoutria japonica. Senecio
 inaequidens exhibited the highest species richness of floral visitors,
 species richness of pollen vectors, and shared interactions with native
 plant species. Impatiens glandulifera exhibited the highest pollen
 transfer efficiency, with nearly 90% of its floral visitors carrying its
 pollen. While floral visitors of the other four studied species also
 interacted with numerous native plants, those of I. glandulifera carried
 its pollen almost exclusively, potentially substituting native species.
 These findings highlight how widely introduced exotic invasive plant
 species can integrate native pollinator networks to the point of
 disconnecting local pollinators from their original resources.
description: Dear Reader, Please find attached the dataset related to the paper
 entitled "Attractiveness of exotic invasive plants can disconnect
 native plants from their floral visitors", published in Oikos. The
 file *Data_final.csv*, contains information on all sampled specimens,
 their taxonomic identification, the plant species from which they were
 collected (corresponding to exotic invasive species, hereafter EIS), as
 well as a description of the pollen types identified on their bodies.
 Description of Variables: * ID: Unique identification number for each
 specimen (text). * Locality: Site name where the specimen was collected
 (text). * Plant of collecting: Latin name of the exotic invasive species
 (EIS) from which the specimen was collected (text). * Latitude /
 Longitude: Coordinates of the sampled patch in a site (WGS 84, decimal
 degrees). * Date: Sampling date (format: YYYY.MM.DD). * Species: Latin
 name of the (morpho-)species identified (text). * Family: Taxonomic family
 of the specimen (text). * Visitor_cat: Categorical group of floral
 visitors. Categories: Bumble bees; Solitary bees; Wasps; Ants; Hoverflies;
 Other flies; Butterflies/moths; Beetles; Others. * Plt.pollen.1 to
 Plt.pollen.9.REST: (Morpho-)species of pollen grains identified on the
 specimen (text). * Prop.1 to Prop.9.REST: Relative proportion of each
 pollen type found on the specimen (%). These values were not used in the
 analyses. Entries with a value of 0% correspond to grain counts below a
 threshold set to avoid contamination, and were therefore excluded. Notes
 on Empty Cells: Empty cells in the Plt.pollen.* and Prop.* columns
 indicate that no additional pollen (morpho-)species were found on the
 specimen beyond those already listed. These columns were filled
 incrementally and left empty when no further pollen was present. No other
 columns in the dataset contain missing data. All empty cells carry a
 specific biological meaning, as described above. If you have any further
 questions or require clarification, please feel free to contact the
 corresponding author. We will be happy to assist you.