Geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae
International audience Interspecific interactions can vary within and among populations and geographical locations, and this variation can influence the nature of the interaction (e.g. mutualistic versus antagonistic) and its evolutionary stability. Globeflowers are exclusively pollinated by flies w...
Published in: | Oecologia |
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Online Access: | https://hal.science/halsde-00293032 https://doi.org/10.1007/s00442-007-0705-3 |
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ftunigrenoble:oai:HAL:halsde-00293032v1 2024-05-12T08:00:41+00:00 Geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae Despres, L. Ibanez, S. Hemborg, A. M. Godelle, B. Laboratoire d'Ecologie Alpine (LECA) Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Department of Botany University of Cape Town Génome, populations, interactions, adaptation (GPIA) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) 2007 https://hal.science/halsde-00293032 https://doi.org/10.1007/s00442-007-0705-3 en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00442-007-0705-3 halsde-00293032 https://hal.science/halsde-00293032 doi:10.1007/s00442-007-0705-3 ISSN: 0029-8549 EISSN: 1432-1939 Oecologia https://hal.science/halsde-00293032 Oecologia, 2007, 153 (1), pp.69-79. ⟨10.1007/s00442-007-0705-3⟩ pollination mutualism seed predators egg aggregation density-dependent competition flower size Trollius-europaeus yucca moths chiastocheta flies mutualism evolution oviposition cooperation conflict anthomyiidae competition [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment info:eu-repo/semantics/article Journal articles 2007 ftunigrenoble https://doi.org/10.1007/s00442-007-0705-3 2024-04-18T03:28:00Z International audience Interspecific interactions can vary within and among populations and geographical locations, and this variation can influence the nature of the interaction (e.g. mutualistic versus antagonistic) and its evolutionary stability. Globeflowers are exclusively pollinated by flies whose larvae feed only on their seeds. Here we document geographical variability in costs and benefits in globeflowers in sustaining their pollinating flies throughout the range of this arctic-alpine European plant over several years. A total of 1,710 flower heads from 38 populations were analysed for their carpel, egg and seed contents. Individual and population analyses control for the confounding influences of variation in both: (1) population traits, such as fly density and egg distribution among flower heads; and (2) individuals traits, such as carpel and egg numbers per flower head. Despite considerable variation in ecological conditions and pollinator densities across populations, large proportions (range 33-58%) of seeds are released after predation, with a benefit-to-cost ratio of 3, indicating that the mutualism is stable over the whole globeflower geographical range. The stability of the mutualistic interaction relies on density-dependent competition among larvae co-developing in a flower head. This competition is revealed by a sharp decrease in the number of seeds eaten per larva with increasing larval number, and is intensified by non-uniform egg distribution among globeflowers within a population. Carpel number is highly variable across globeflowers (range 10-69), and flies lay more eggs in large flowers. Most plants within a population contribute to the rearing of pollinators, but some pay more than others. Large globeflowers lose more seed to pollinator larvae, but also release more seed than smaller plants. The apparent alignment of interests between fly and plant (positive relationship between numbers of seeds released and destroyed) is shown to hide a conflict of interest found when flower size is ... Article in Journal/Newspaper Arctic Université Grenoble Alpes: HAL Arctic Oecologia 153 1 69 79 |
institution |
Open Polar |
collection |
Université Grenoble Alpes: HAL |
op_collection_id |
ftunigrenoble |
language |
English |
topic |
pollination mutualism seed predators egg aggregation density-dependent competition flower size Trollius-europaeus yucca moths chiastocheta flies mutualism evolution oviposition cooperation conflict anthomyiidae competition [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment |
spellingShingle |
pollination mutualism seed predators egg aggregation density-dependent competition flower size Trollius-europaeus yucca moths chiastocheta flies mutualism evolution oviposition cooperation conflict anthomyiidae competition [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment Despres, L. Ibanez, S. Hemborg, A. M. Godelle, B. Geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae |
topic_facet |
pollination mutualism seed predators egg aggregation density-dependent competition flower size Trollius-europaeus yucca moths chiastocheta flies mutualism evolution oviposition cooperation conflict anthomyiidae competition [SDE.BE]Environmental Sciences/Biodiversity and Ecology [SDV.BID]Life Sciences [q-bio]/Biodiversity [SDV.EE]Life Sciences [q-bio]/Ecology environment |
description |
International audience Interspecific interactions can vary within and among populations and geographical locations, and this variation can influence the nature of the interaction (e.g. mutualistic versus antagonistic) and its evolutionary stability. Globeflowers are exclusively pollinated by flies whose larvae feed only on their seeds. Here we document geographical variability in costs and benefits in globeflowers in sustaining their pollinating flies throughout the range of this arctic-alpine European plant over several years. A total of 1,710 flower heads from 38 populations were analysed for their carpel, egg and seed contents. Individual and population analyses control for the confounding influences of variation in both: (1) population traits, such as fly density and egg distribution among flower heads; and (2) individuals traits, such as carpel and egg numbers per flower head. Despite considerable variation in ecological conditions and pollinator densities across populations, large proportions (range 33-58%) of seeds are released after predation, with a benefit-to-cost ratio of 3, indicating that the mutualism is stable over the whole globeflower geographical range. The stability of the mutualistic interaction relies on density-dependent competition among larvae co-developing in a flower head. This competition is revealed by a sharp decrease in the number of seeds eaten per larva with increasing larval number, and is intensified by non-uniform egg distribution among globeflowers within a population. Carpel number is highly variable across globeflowers (range 10-69), and flies lay more eggs in large flowers. Most plants within a population contribute to the rearing of pollinators, but some pay more than others. Large globeflowers lose more seed to pollinator larvae, but also release more seed than smaller plants. The apparent alignment of interests between fly and plant (positive relationship between numbers of seeds released and destroyed) is shown to hide a conflict of interest found when flower size is ... |
author2 |
Laboratoire d'Ecologie Alpine (LECA) Université Joseph Fourier - Grenoble 1 (UJF)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS) Department of Botany University of Cape Town Génome, populations, interactions, adaptation (GPIA) Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Despres, L. Ibanez, S. Hemborg, A. M. Godelle, B. |
author_facet |
Despres, L. Ibanez, S. Hemborg, A. M. Godelle, B. |
author_sort |
Despres, L. |
title |
Geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae |
title_short |
Geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae |
title_full |
Geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae |
title_fullStr |
Geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae |
title_full_unstemmed |
Geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae |
title_sort |
geographical and within-population variation in the globeflower-globeflower fly interaction: the costs and benefits of rearing pollinator's larvae |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/halsde-00293032 https://doi.org/10.1007/s00442-007-0705-3 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
ISSN: 0029-8549 EISSN: 1432-1939 Oecologia https://hal.science/halsde-00293032 Oecologia, 2007, 153 (1), pp.69-79. ⟨10.1007/s00442-007-0705-3⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00442-007-0705-3 halsde-00293032 https://hal.science/halsde-00293032 doi:10.1007/s00442-007-0705-3 |
op_doi |
https://doi.org/10.1007/s00442-007-0705-3 |
container_title |
Oecologia |
container_volume |
153 |
container_issue |
1 |
container_start_page |
69 |
op_container_end_page |
79 |
_version_ |
1798842650982350848 |