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https://hdl.handle.net/1959.11/54516
Title: | Fatal attraction - the predation of pollinators leads to reproductive conflict in pollen limited populations of Drosera hookeri (Droseraceae) - Dataset | Contributor(s): | Gross, Caroline (creator)![]() ![]() ![]() |
Publication Date: | 2023-04-04 | DOI: | 10.25952/z8jk-jf44 | Handle Link: | https://hdl.handle.net/1959.11/54516 | Abstract/Context: | Pollinator-prey conflict in carnivorous plants occurs when plants that benefit from pollinators are pollen-limited and pollinators are snared by trap-leaves. To date a strong pollinator-prey conflict has not been found and is attributed to spatial and/or cue differences between flowers and traps abating conflict. Here we test whether pollinator-prey conflict occurs for Drosera hookeri (Droseraceae), which produces entomophilous flowers adjacent to leaf-traps. We also test the hypothesis that flowers have a dual role of pollinator attraction and deception by tumbling pollinators and other floral visitors into leaf-traps. From 2007-2021, in a drought-prone habitat in eastern Australia, pollinator diversity and visitation rates were scored at flowers using camcorders while pan-traps provided an estimate of pollinator abundance in the community. Hand-pollination experiments were used to determine pollinator dependence and pollen limitation. We also measured arthropod abundance in trap-leaves before, during and after flowering. In a paired experiment we compared leaf captures between plants with and without flowers to determine if flowers are complicit in the leaf captures of pollinators. Although self-compatible, with a delayed selfing-mechanism, outcrossed flowers produced more seed than self-pollinated flowers, indicating that pollinators are beneficial. Plants were pollen-limited in both years tested. Flies (non-pollinating and pollinating) were the most common prey with the greatest numbers during peak flowering. Pollinators, predominantly Melangyna virdiceps (Syriphidae, Diptera), contributed c. 57% of prey captures, and experimentally we show that they are not attracted to plants without flowers. Pollinators are often deposited into trap-leaves from flowers, which tip under their weight, to nearby leaf traps. A strong pollinator-prey conflict was detected with an overlap in prey and pollinators in a pollen and pollinator-limited system. Flowers attract pollinators and non-pollinators to plants. Leaf entrapment for pollinators occurs as a mishap in foraging rather than attraction to trap-leaves. The flowers in D. hookeri have the dual role of pollination and prey provision. | Publication Type: | Dataset | Fields of Research (FOR): | 060208 Terrestrial Ecology | Fields of Research (FoR) 2020: | 410401 Conservation and biodiversity | Socio-Economic Objective (SEO): | 960899 Flora, Fauna and Biodiversity of Environments not elsewhere classified | Socio-Economic Objective (SEO) 2020: | 180606 Terrestrial biodiversity | Location: | Copeton, New South Wales, Australia Tingha, New South Wales, Australia Armidale, New South Wales, Australia |
HERDC Category Description: | X Dataset | Project: | Fatal attraction - the predation of pollinators leads to reproductive conflict in pollen limited populations of Drosera hookeri (Droseraceae) | Dataset Managed By: | Caroline Gross | Rights Holder: | Caroline Gross | Dataset Stored at: | University of New England | Primary Contact Details: | Caroline Gross - cgross@une.edu.au | Dataset Custodian Details: | Caroline Gross - cgross@une.edu.au |
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