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10 results on '"Margaret Mayfield"'

1. AusTraits, a curated plant trait database for the Australian flora

Author

Daniel Falster, Rachael Gallagher, Elizabeth H. Wenk, Ian J. Wright, Dony Indiarto, Samuel C. Andrew, Caitlan Baxter, James Lawson, Stuart Allen, Anne Fuchs, Anna Monro, Fonti Kar, Mark A. Adams, Collin W. Ahrens, Matthew Alfonzetti, Tara Angevin, Deborah M. G. Apgaua, Stefan Arndt, Owen K. Atkin, Joe Atkinson, Tony Auld, Andrew Baker, Maria von Balthazar, Anthony Bean, Chris J. Blackman, Keith Bloomfield, David M. J. S. Bowman, Jason Bragg, Timothy J. Brodribb, Genevieve Buckton, Geoff Burrows, Elizabeth Caldwell, James Camac, Raymond Carpenter, Jane A. Catford, Gregory R. Cawthray, Lucas A. Cernusak, Gregory Chandler, Alex R. Chapman, David Cheal, Alexander W. Cheesman, Si-Chong Chen, Brendan Choat, Brook Clinton, Peta L. Clode, Helen Coleman, William K. Cornwell, Meredith Cosgrove, Michael Crisp, Erika Cross, Kristine Y. Crous, Saul Cunningham, Timothy Curran, Ellen Curtis, Matthew I. Daws, Jane L. DeGabriel, Matthew D. Denton, Ning Dong, Pengzhen Du, Honglang Duan, David H. Duncan, Richard P. Duncan, Marco Duretto, John M. Dwyer, Cheryl Edwards, Manuel Esperon-Rodriguez, John R. Evans, Susan E. Everingham, Claire Farrell, Jennifer Firn, Carlos Roberto Fonseca, Ben J. French, Doug Frood, Jennifer L. Funk, Sonya R. Geange, Oula Ghannoum, Sean M. Gleason, Carl R. Gosper, Emma Gray, Philip K. Groom, Saskia Grootemaat, Caroline Gross, Greg Guerin, Lydia Guja, Amy K. Hahs, Matthew Tom Harrison, Patrick E. Hayes, Martin Henery, Dieter Hochuli, Jocelyn Howell, Guomin Huang, Lesley Hughes, John Huisman, Jugoslav Ilic, Ashika Jagdish, Daniel Jin, Gregory Jordan, Enrique Jurado, John Kanowski, Sabine Kasel, Jürgen Kellermann, Belinda Kenny, Michele Kohout, Robert M. Kooyman, Martyna M. Kotowska, Hao Ran Lai, Etienne Laliberté, Hans Lambers, Byron B. Lamont, Robert Lanfear, Frank van Langevelde, Daniel C. Laughlin, Bree-Anne Laugier-Kitchener, Susan Laurance, Caroline E. R. Lehmann, Andrea Leigh, Michelle R. Leishman, Tanja Lenz, Brendan Lepschi, James D. Lewis, Felix Lim, Udayangani Liu, Janice Lord, Christopher H. Lusk, Cate Macinnis-Ng, Hannah McPherson, Susana Magallón, Anthony Manea, Andrea López-Martinez, Margaret Mayfield, James K. McCarthy, Trevor Meers, Marlien van der Merwe, Daniel J. Metcalfe, Per Milberg, Karel Mokany, Angela T. Moles, Ben D. Moore, Nicholas Moore, John W. Morgan, William Morris, Annette Muir, Samantha Munroe, Áine Nicholson, Dean Nicolle, Adrienne B. Nicotra, Ülo Niinemets, Tom North, Andrew O’Reilly-Nugent, Odhran S. O’Sullivan, Brad Oberle, Yusuke Onoda, Mark K. J. Ooi, Colin P. Osborne, Grazyna Paczkowska, Burak Pekin, Caio Guilherme Pereira, Catherine Pickering, Melinda Pickup, Laura J. Pollock, Pieter Poot, Jeff R. Powell, Sally A. Power, Iain Colin Prentice, Lynda Prior, Suzanne M. Prober, Jennifer Read, Victoria Reynolds, Anna E. Richards, Ben Richardson, Michael L. Roderick, Julieta A. Rosell, Maurizio Rossetto, Barbara Rye, Paul D. Rymer, Michael A. Sams, Gordon Sanson, Hervé Sauquet, Susanne Schmidt, Jürg Schönenberger, Ernst-Detlef Schulze, Kerrie Sendall, Steve Sinclair, Benjamin Smith, Renee Smith, Fiona Soper, Ben Sparrow, Rachel J. Standish, Timothy L. Staples, Ruby Stephens, Christopher Szota, Guy Taseski, Elizabeth Tasker, Freya Thomas, David T. Tissue, Mark G. Tjoelker, David Yue Phin Tng, Félix de Tombeur, Kyle Tomlinson, Neil C. Turner, Erik J. Veneklaas, Susanna Venn, Peter Vesk, Carolyn Vlasveld, Maria S. Vorontsova, Charles A. Warren, Nigel Warwick, Lasantha K. Weerasinghe, Jessie Wells, Mark Westoby, Matthew White, Nicholas S. G. Williams, Jarrah Wills, Peter G. Wilson, Colin Yates, Amy E. Zanne, Graham Zemunik, and Kasia Ziemińska

Subjects
Science
Abstract

Measurement(s) plant trait Technology Type(s) digital curation Sample Characteristic - Organism Viridiplantae Sample Characteristic - Location Australia Machine-accessible metadata file describing the reported data: https://doi.org/10.6084/m9.figshare.14545755

Published
2021
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3. Estimating interaction matrices from performance data for diverse systems

Author

Trace Martyn, Malyon Bimler, Margaret Mayfield, and Daniel Stouffer

Abstract

Network theory allows us to understand complex systems by evaluating how their constituent elements interact with one another. Such networks are built from matrices which describe the effect of each element on all others. Quantifying the strength of these interactions from empirical data can be difficult, however, because the number of potential interactions increases non-linearly as more elements are included in the system, and not all interactions may be empirically observable when some elements are rare.We present a novel modelling framework which estimates the strength of pairwise interactions in diverse horizontal systems, using measures of species performance in the presence of varying densities of their potential interaction partners.Our method allows us to directly estimate pairwise effects when they are statistically identifiable and approximate pairwise effects when they would otherwise be statistically unidentifiable. The resulting interaction matrices can include positive and negative effects, the effect of a species on itself, and are non-symmetrical.The advantages of these features are illustrated with a case study on an annual wildflower community of 22 focal and 52 neighbouring species, and a discussion of potential applications of this framework extending well beyond plant community ecology.

Published
2022

6. Asteraceae invaders have limited impacts on the pollination of common native annual species in SW Western Australia’s open woodland wildflower communities

Author

Claire Wainwright, Margaret Mayfield, and Xingwen Loy

Subjects
Ecology, Pollination, Wildflower, fungi, Biodiversity, food and beverages, Introduced species, Plant Science, 15. Life on land, Biology, Native plant, Invasive species, Habitat, Pollinator
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.

Published
2015

8. Book reviews

Author

Bradley C. Bennett, Dorothea Bedigian, Luke Utley, Kristen Porter-Utley, Darron Collins, Julie Ann Ferguson Demers, Margaret Mayfield, Richard Moyroud, Neil A. Harriman, John C. Volin, John Edmondson, and Cath Cotton

Subjects
Plant Science, Horticulture
Published
1998

9. Exploring the ‘Most Effective Pollinator Principle’ with Complex Flowers: Bumblebees and Ipomopsis aggregata.

Author

Margaret Mayfield, Nickolas Waser, and Mary Price

Abstract

The ‘most effective pollinator principle’ implies that floral characteristics often reflect adaptation to the pollinator that transfers the most pollen, through a combination of high rate of visitation to flowers and effective deposition of pollen during each visit. We looked for the expected positive correlation between quantity and quality of visits in Ipomopsis aggregata, whose red, tubular flowers are considered to be adapted to hummingbirds. Hummingbirds were indeed the most common floral visitors in 5 years of observation. However, long-tongued bumblebees deposited on average three-times as much outcross pollen per visit to virgin flowers, and elicited four-times as much seed production, as did hummingbirds. Hence visitors that are relatively infrequent, and unexpected given the ‘pollination syndrome’ of the plant, can be surprisingly good pollinators. One interpretation of this observation is that natural selection favours a specialized floral morphology that excludes all but a single type of visitor, but that there are constraints on achieving this outcome. An alternative is that selection favours some degree of floral generalization, but that flowers can retain features that adapt them to a particular type of pollinator in spite of this generalization. Copyright 2001 Annals of Botany Company [ABSTRACT FROM AUTHOR]

Published
2001
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