DOI: 10.5061/dryad.3q74b
title: Data from: The relation between oilseed rape and pollination of later flowering plants varies across plant species and landscape contexts

description: Increasing cultivation of oilseed rape may have consequences for
 pollinators and wild plant pollination. By providing pollinating insects
 with pollen and nectar, oilseed rape benefits short-tongued, generalist
 insect species. Long-tongued bumble bee species, specialized to other
 flower types, may instead be negatively affected by increased competition
 from the generalists (e.g. due to nectar-robbing of long-tubed flowers)
 after oilseed rape has ceased flowering. We expected that the increased
 abundance of short-tongued pollinators and reduced abundance of
 long-tongued bumble bees in landscapes with a high proportion of oilseed
 rape would impact the pollination of later flowering wild plant species.
 In addition, we expected contrasting effects on plants pollinated by
 short-tongued pollinators and those pollinated by long-tongued bumble
 bees. We predicted that semi-natural grasslands, which provide insects
 with alternative floral resources, would reduce both negative and positive
 effects on pollination by mitigating competition between pollinators. In
 16 semi-natural grasslands, surrounded by agricultural landscapes, with a
 variation in both the proportion of oilseed rape and the proportion of
 semi-natural grassland within 1 km, we studied reproductive output in two
 species of potted plants with different pollination strategies: the
 woodland strawberry (Fragaria vesca) and red clover (Trifolium pratense).
 The first species is mainly pollinated by short-tongued pollinators, e.g.
 hoverflies and solitary bees, and the latter by long-tongued bumble bees.
 Both species flowered after oilseed rape. Strawberry weight was higher in
 landscapes with a high proportion of oilseed rape, but only in landscapes
 with a low proportion of semi-natural grassland. The proportion of
 developed achenes was also positively related to the proportion of oilseed
 rape, but only during the latest flowering period. In contrast, red clover
 seed set was unrelated to the proportion of oilseed rape. Whereas the
 discrepancy between the two strawberry measurements calls for further
 research, this study suggests that oilseed rape can affect later flowering
 plants and that the impact differs among species.
description: Strawberry
 weightThis file contains data
 used for the main analysis on strawberry weight, including landscape data.
 It also contains the data that were used in Appendix D. The proportions of
 oilseed rape and semi-natural grassland refer to landscape sectors with 1
 km radius, surrounding the pots where reproductive success was
 measured.Strawberry_weight.xlsxStrawberry_achenesThis file contains data used for the main analysis on the proportion of developed strawberry achenes, including landscape data. The proportions of oilseed rape and semi-natural grassland refer to landscape sectors with 1 km radius, surrounding the pots where reproductive success was measured.Red_cloverThis file contains data used for the main analysis on the proportional seed set of red clover (per inflorescence), including landscape data. The proportions of oilseed rape and semi-natural grassland refer to landscape sectors with 1 km radius, surrounding the pots where reproductive success was measured.AppendixEThis file contains data that we used to verify that strawberry weight increased with the proportion as well as number of developed achenes.