Pollination, Pollinators and Food Production

Search Library

Asteraceae invaders have limited impacts on the pollination of common native annual species in SW Western Australia’s open woodland wildflower communities
Articles/Book chapters
2015
Abstract: 

The York gum–jam woodlands of southwest Western Australia support diverse annual wildflower communities despite extensive habitat fragmentation, remnant isolation and the invasion of many exotic annual plant species. Few studies have explored the pollinator–plant relationships maintaining these persistently species-rich ‘novel’ communities. We examine the pollination ecology of five native species common to York gum–jam woodland annual communities to determine whether native pollinators may be mediating impacts of exotic annual plants on native wildflower species. We determined the pollination requirements of native focal species and the diversity and frequency of pollinator visitation to these focal plant species across invasion gradients. We also recorded the pollinator community of a dominant exotic herb in this system: Arctotheca calendula (cape weed). Only two of the five native species examined had significant seed set benefits attributable to insect pollination. One native plant species, Podotheca gnaphalioides, had pollinator assemblages that overlapped significantly with exotic A. calendula, with some reduction in pollinator visitation evident. One species, Waitzia acuminata, was found to benefit from insect pollination only in the larger of two surveyed remnants, which may reflect emerging reproductive polymorphism among geographically isolated populations. We highlight two mechanisms in this system that may buffer pollinator-mediated impacts of exotic species on native species: autonomous seed production, which may be increasingly prevalent in isolated populations, and segregation of pollinator resources among species. Our findings illustrate the ways that pollinator-mediated interactions can affect seed set within plant communities persisting in highly fragmented and invaded agricultural landscapes.

Document language: 
English
Authors: 
Xingwen Loy, Claire E. Wainwright and Margaret M. Mayfield
Organization producing the document: 
Plant Ecology
Country: 
United Kingdom
Thematic area: 
Pollination, Pollinators and Food Production
Tags: 

See Related Resources

Resources

Organisations and Initiatives

The following organisations and initiatives are leaders in the field of Pollination, Pollinators and Food Production. They have provided content, experts, and more to BES-Net. To learn more about a particular organization and the work they are doing click below.

Search library

Search or browse through our library of existing resources on Pollination, Pollinators and Food Production. Entries include scientific articles, reports, policy briefs, webinars, videos, and more. To view a particular resource, click below.

Experts

These individuals are experts in the field of Pollination, Pollinators and Food Production. BES-Net experts come from a wide range of sectors, from community activists to research scientists. They are available to answer questions, respond to polls, and engage in conversation with BES-Net users on their area of expertise. To learn more about an expert and their work, or get in touch with them, click below.

Suggestions