DOI: 10.5061/dryad.pm251177
title: Data from: Evaluating the influence of different aspects of habitat fragmentation on mating patterns and pollen dispersal in the bird-pollinated Banksia sphaerocarpa var. caesia

description: Habitat fragmentation can significantly affect mating and pollen dispersal
 patterns in plant populations, although the differential effects of the
 various aspects of fragmentation are poorly understood. In this study we
 used paternity assignment with eight microsatellite loci to investigate
 the effect of fragmentation on the mating system and pollen dispersal
 within one large and eight small population remnants of Banksia
 sphaerocarpa var. caesia, a bird-pollinated shrub in the southern
 agricultural region of Western Australia. The large population had a much
 larger neighbourhood size and lower selfing rate, maternal pollen pool
 differentiation and within-plot mean pollen dispersal distance than the
 small populations. Outcrossing was consistently high and ranged from 89% ±
 0.8 to 98.5% ± 0.3, and mating patterns suggested nearest-neighbour
 pollination. Pollen immigration into small populations ranged from 6% ±
 0.6 to 15% ± 0.6. Using the small populations, we tested for correlations
 between various fragmentation variables and mating system and pollen
 dispersal parameters. We found significant positive linear relationships
 between population size and number of different fathers per seed crop and
 between population shape and pollen pool differentiation. There were
 significant negative linear relationships between population isolation and
 outcrossing rate; population shape and neighbourhood size; and conspecific
 density and mean pollen dispersal distance. Our results suggest that birds
 may use a series of fragmented populations as a vegetation corridor while
 foraging across the landscape and that population connectivity is a
 critical determinant of pollinator visitation. Our results also suggest
 that the effect of a linear population shape on the mating system and
 pollen dispersal is routinely underestimated.
description: Adult genotypes and
 coordinatesMicrosatellite data for
 adult plants used in the analyses. Adults were sampled from 9 populations.
 For 87F, all adults within a focus area were sampled. For the remaining 8
 populations, all adults present within the population remnant were
 sampled. Columns are as follows: ID of adult plants; Population code; Data
 for 8 microsatellite loci; Geographic coordinates for each plant. Missing
 data are coded by '0'. Geographic coordinates are latitude and
 longitude recorded in decimal degrees using a differential GPS. Datum:
 Geocentric Datum of Australia 1994 (GDA94). Data were collected by Tanya
 Llorens and Heidi Nistelberger. Queries should be directed to Tanya
 Llorens.Progeny and maternal
 genotypesMicrosatellite data for
 seedlings and mothers used in the analyses. Seedlings were produced by
 germinating seeds collected from maternal plants in nine populations.
 Columns are as follows: ID of individual seedlings and maternal plants; ID
 of the mother of each seedling; Population code; Data for 8 microsatellite
 loci. Missing data are coded by '0'. For each seedling cohort,
 the rows of seedling data are preceded by a row containing the maternal
 genotype. Data were collected by Tanya Llorens and Heidi Nistelberger.
 Queries should be directed to Tanya Llorens.