12 Works

Intraspecific mating system evolution and its effect on complex male secondary sexual traits: does male-male competition increase selection on size or shape?

Julian Baur, Jeannine Roy, Martin A. Schäfer, Nalini Puniamoorthy, Wolf U. Blanckenhorn & Patrick T. Rohner
Sexual selection is generally held responsible for the exceptional diversity in secondary sexual traits in animals. Mating system evolution is therefore expected to profoundly affect the covariation between secondary sexual traits and mating success. While there is such evidence at the interspecific level, data within species remain scarce. We here investigate sexual selection acting on the exaggerated male fore femur and the male wing in the common and widespread dung flies Sepsis punctum and S....



Perceptions of Singapore's Built Heritage and Landmarks

Chia Shih Paveena Seah, Natalie Pang, Kwang Lin Wong &
The Study on the Perceptions of Singapore’s Built Heritage and Landmarks seeks to understand public opinion towards built heritage in Singapore, drawing on an opinion poll of 53 heritage sites. Given that scholarly and policy-centred discussions of heritage value and conservation are usually centred on the perspectives of experts, this report focuses on how average Singaporeans perceive the meaning, purpose and value of built heritage, and how these perceptions influence the sense of national identity....

Inquiline predator increases nutrient-cycling efficiency of Nepenthes rafflesiana pitchers

Weng Ngai Lam, Ying Yi Chou, Felicia Leong & Hugh Tan
The modified-leaf pitchers of Nepenthes rafflesiana pitcher plants are aquatic, allochthonous ecosystems which are inhabited by specialist inquilines and sustained by the input of invertebrate prey. Detritivorous inquilines are known to increase the nutrient-cycling efficiency (NCE) of pitchers but it is unclear if predatory inquilines which prey on these detritivores decrease the NCE of pitchers by reducing detritivore populations or increase the NCE of pitchers by processing nutrients that may otherwise be locked up in...

Data from: Fear effects associated with predator presence and habitat structure interact to alter herbivory on coral reefs

Andrew Bauman, Jovena Seah, Fraser Januchowski-Hartley, Andrew Hoey, Jenny Fong & Peter Todd
Non-consumptive fear effects are an important determinant of foraging decisions by consumers across a range of ecosystems. However, how fear effects associated with the presence of predators interact with those associated with habitat structure remains unclear. Here, we used predator fish models (Plectropomus leopardus) and experimental patches of the macroalga Sargassum ilicifolium of varying densities to investigate how predator- and habitat-associated fear effects influence herbivory on coral reefs. We found the removal of macroalgal biomass...

Data from: Patterns of nitrogen-fixing tree abundance in forests across Asia and America

Duncan N. L. Menge, Ryan A. Chisholm, Stuart J. Davies, Kamariah Abu Salim, David Allen, Mauricio Alvarez, Norm Bourg, Warren Y. Brockelman, Sarayudh Bunyavejchewin, Nathalie Butt, Min Cao, Wirong Chanthorn, Wei-Chun Chao, Keith Clay, Richard Condit, Susan Cordell, João Batista Da Silva, H. S. Dattaraja, Ana Cristina Segalin De Andrade, Alexandre A. Oliveira, Jan Den Ouden, Michael Drescher, Christine Fletcher, Christian P. Giardina, C. V. Savitri Gunatilleke … & Tak Fung
Symbiotic nitrogen (N)‐fixing trees can provide large quantities of new N to ecosystems, but only if they are sufficiently abundant. The overall abundance and latitudinal abundance distributions of N‐fixing trees are well characterised in the Americas, but less well outside the Americas. Here, we characterised the abundance of N‐fixing trees in a network of forest plots spanning five continents, ~5,000 tree species and ~4 million trees. The majority of the plots (86%) were in America...

Auditory English Lexicon Project

Winston Goh, Melvin Yap & Qian Wen Chee
The AELP is a multi-talker, multi-region psycholinguistic database of 10,170 spoken words and an identical number of nonwords. Six tokens of each stimulus were recorded as 44.1 kHz, 16-bit, mono WAV files by native speakers of American, British, and Singapore English, with one from each gender. Identification norms, as determined by the average intelligibility scores and confidence ratings from between 15 and 20 responses per token, were obtained from 561 participants. Auditory lexical decision accuracies...

Data from: Conserving evolutionary history does not result in greater diversity over geological timescales

Juan Cantalapiedra, Tracy Aze, Marc Cadotte, Giulio Valentino Dalla Riva, Danwei Huang, Florent Mazel, Matthew Pennell, María Ríos & Arne Mooers
Alternative prioritization strategies have been proposed to safeguard biodiversity over macro-evolutionary timescales. The first prioritizes the most distantly related species (maximizing phylogenetic diversity) in the hopes of capturing at least some lineages that will successfully diversify into the future. The second prioritizes lineages that are currently speciating, in the hopes that successful lineages will continue to generate species into the future. These contrasting schemes also map onto contrasting predictions about the role of slow diversifiers...

Data from: Distal-less activates butterfly eyespots consistent with a reaction diffusion process

Heidi Connahs, Sham Tlili, Jelle Van Creij, Tricia Y. J. Loo, Tirtha Das Banerjee, Timothy E Saunders & Antonia Monteiro
Eyespots on the wings of nymphalid butterflies represent colorful examples of pattern formation, yet the developmental origins and mechanisms underlying eyespot center differentiation are still poorly understood. Using CRISPR-Cas9 we re-examine the function of Distal-less (Dll) as an activator or repressor of eyespots, a topic that remains controversial. We show that the phenotypic outcome of CRISPR mutations depends upon which specific exon is targeted. In Bicyclus anynana, exon 2 mutations are associated with both missing...

Data from: The N-end Rule Pathway and Ubr1 enforce protein compartmentalization via P2-encoded cellular location signals

Anthony Tran
The Arg/N-end Rule Pathway and Ubr1, an E3 ligase conserved from yeast to humans, is involved in the degradation of misfolded proteins in the cytosol. However, the root physiological purpose of this activity is not completely understood. Through a systematic examination of single residue P2-position mutants of misfolded proteins, and global and targeted bioinformatic analyses of the yeast proteome, we determined that Ubr1 preferentially targets mistranslocated secretory and mitochondrial proteins in the cytosol. Degradation by...

Data from: Profile of and risk factors for post-stroke cognitive impairment in diverse ethno-regional groups

Jessica W Lo, John D Crawford, David W Desmond, Olivier Godefroy, Hanna Jokinen, Simin Mahinrad, Hee-Joon Bae, Sebastian Köhler, Elles Douven, Julie Staals, Christopher Chen, Xin Xu, Eddie J Chong, Rufus O Akinyemi, Rajesh N Kalaria, Adesola Ogunniyi, Mélanie Barbay, Martine Roussel, Byung-Chul Lee, Velandai K Srikanth, Christopher Moran, Nagaendran Kandiah, Russell J Chander, Behnam Sabayan, J. Wouter Jukema … & Perminder S Sachdev
OBJECTIVE: To address the variability in prevalence estimates and inconsistencies in potential risk factors for post-stroke cognitive impairment (PSCI) using a standardised approach and individual participant data (IPD) from international cohorts in the STROKOG consortium. METHODS: We harmonised data from thirteen studies based in eight countries. Neuropsychological test scores 2 to 6 months after stroke or TIA and appropriate normative data were used to calculate standardised cognitive domain scores. Domain-specific impairment was based on percentile...

Transgenerational inheritance of learned preferences for novel host plant odors in Bicyclus anynana butterflies

V Gowri, Emilie Dion, Athmaja Viswanath, Florence Monteiro Piel & Antónia Monteiro
Many phytophagous insects have strong preferences for their host plants, which they recognize via odors, making it unclear how novel host preferences develop in the course of insect diversification. Insects may learn to prefer new host plants via exposure to their odors and pass this learned preference to their offspring. We tested this hypothesis by examining larval odor preferences before and after feeding them with leaves coated with control and novel odors and by examining...

Registration Year

  • 2019

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  • National University of Singapore
  • Indiana University Bloomington
  • Northwestern University
  • University of Montana
  • Seoul National University Bundang Hospital
  • Guangxi Institute of Botany
  • Utah State University
  • Columbia University
  • Field Museum of Natural History
  • Tunghai University