33 Works

Data from: Increasing the germination envelope under water stress improves seedling emergence in two dominant grass species across different pulse rainfall events

Wolfgang Lewandrowski, Todd E. Erickson, Kingsley W. Dixon & Jason C. Stevens
1. Demographic recruitment processes, such as seed germination and seedling emergence, are critical transitional phases to the re-establishment of degraded plant populations, but often fail due to rainfall not supporting plant requirements. Using species from the widespread arid Australian perennial grass genus Triodia, we investigated the interactions of seeds in different dormancy states and their functional germination envelope in response to water stress after simulated pulse rainfall events. 2. Seed dormancy was alleviated in Triodia...

Data from: Seminal fluid of honeybees contains multiple mechanisms to combat infections of the sexually transmitted pathogen Nosema apis

Yan Peng, Julia Grassl, A. Harvey Millar & Boris Baer
The societies of ants, bees and wasps are genetically closed systems where queens only mate during a brief mating episode prior to their eusocial life and males therefore provide queens with a lifetime supply of high-quality sperm. These ejaculates also contain a number of defence proteins that have been detected in the seminal fluid but their function and efficiency have never been investigated in great detail. Here, we used the honeybee Apis mellifera and quantified...

Data from: Sperm competition and the evolution of precopulatory weapons: testis size and amplexus position, but not arm strength, affect fertilization success in a chorusing frog

Bruno Alves Buzatto, Evan Tyler, J. Dale Roberts, Leigh W. Simmons & Evan M. Thyer
Trade-offs between pre- and postcopulatory traits influence their evolution, and male expenditure on such traits is predicted to depend on the number of competitors, the benefits from investing in weapons, and the risk and intensity of sperm competition. Males of the chorusing frog Crinia georgiana use their arms as weapons in contest competition. Previously, we showed that increased numbers of rivals elevated the risk and intensity of sperm competition due to multimale amplexus, and caused...

Data from: Impaired sperm quality, delayed mating but no costs for offspring fitness in crickets winning a fight

Cristina Tuni, Jhoniel Perdigón Ferreira, Yvonne Fritz, Amanda Munoz Meneses & Clelia Gasparini
The outcome of male-male contest competition is known to affect male mating success and is believed to confer fitness benefits to females through preference for dominant males. However, by mating with contest winners, females can incur significant costs spanning from decreased fecundity to negative effects on offspring. Hence identifying costs and benefits of male dominance on female fitness is crucial to unravel the potential for a conflict of interests between the sexes. Here we investigated...

Data from: Female-induced remote regulation of sperm physiology may provide opportunities for gamete-level mate choice

Jukka Kekäläinen & Jonathan P. Evans
In sedentary externally fertilizing species, direct interactions between mating partners are limited and pre-fertilization communication between sexes occur largely at the gamete level. Certain combinations of eggs and sperm often have higher fertilization success than others, which may be contingent on egg-derived chemical factors that preferentially attract sperm from compatible males. Here, we examine the mechanisms underlying such effects in the marine mussel Mytilus galloprovincialis, where differential sperm attraction has recently been shown to be...

Data from: Current and projected global distribution of Phytophthora cinnamomi, one of the world’s worst plant pathogens

Treena Burgess, John K. Scott, Keith L. McDougall, Michael J. C. Stukely, Colin Crane, William A. Dunstan, Frances Brigg, Vera Andjic, Diane White, Tim Rudman, Frans Arentz, Noboru Ota, Giles E. St.J. Hardy, Treena I. Burgess & Giles E. St. J. Hardy
Globally, Phytophthora cinnamomi is listed as one of the 100 worst invasive alien species and active management is required to reduce impact and prevent spread in both horticulture and natural ecosystems. Conversely, there are regions thought to be suitable for the pathogen where no disease is observed. We developed a CLIMEX model for the global distribution of P. cinnamomi based on the pathogen's response to temperature and moisture and by incorporating extensive empirical evidence on...

Data from: A novel stereo-video method to investigate fish-habitat relationships

Danielle L. Collins, Tim J. Langlois, Todd Bond, Thomas H. Holmes, Euan S. Harvey, Rebecca Fisher & Dianne L. McLean
Habitat complexity is known to influence the structure of fish assemblages. A number of techniques have previously been used to measure complexity, including quantitative in situ methods, which can be time-consuming and labour-intensive, and more rapid semi-quantitative visual scoring methods. This study investigated the utility of a novel method for estimating complexity, whereby habitat height was measured using stereo-photogrammetry from diver-operated stereo-video, traditionally used to sample fish assemblages. This ‘stereo-height’ method was compared to established...

Data from: Native soilborne pathogens equalise differences in competitive ability between plants of contrasting nutrient-acquisition strategies

Felipe E. Albornoz, Treena I. Burgess, Hans Lambers, Hannah Etchells & Etienne Laliberté
Soilborne pathogens can contribute to the maintenance of local plant diversity by reducing differences in competitive ability between co-occurring plant species. It has been hypothesized that efficient phosphorus (P) acquisition by plants in P-impoverished ecosystems might trade off against resistance to root pathogens. This could help explain high plant diversity in severely nutrient-impoverished ecosystems. However, empirical evidence of such a trade-off remains scarce. In hyperdiverse shrublands in south-western Australia, non-mycorrhizal cluster-rooted Proteaceae are very efficient...

Registration Year

  • 2016
    33

Resource Types

  • Dataset
    33

Affiliations

  • University of Western Australia
    33
  • Curtin University
    5
  • Murdoch University
    3
  • Spanish National Research Council
    3
  • Department of Parks and Wildlife
    3
  • University of Adelaide
    2
  • University of Montreal
    2
  • University of Melbourne
    2
  • Commonwealth Scientific and Industrial Research Organisation
    2
  • Max Planck Institute for Ornithology
    1