16 Works

BigWig files for FAIRE-seq data

Heidi Connahs
Butterfly wings exhibit a diversity of patterns which can vary between forewings and hindwings and spatially across the same wing. Regulation of morphological variation involves changes in how genes are expressed across different spatial scales which is driven by chromatin dynamics during development. How patterns of chromatin dynamics correspond to morphological variation remains unclear. Here we compared the chromatin landscape between forewings and hindwings and also across the proximal and distal regions of the hindwings...

From crypsis to masquerade: ontogeny changes the colour defences of a crab spider hiding as bird droppings

Long Yu, Xin Xu, Fan Li, Wei Zhou, Hua Zeng, Eunice Tan, Shichang Zhang & Daiqin Li
Selection imposed by visually-hunting predators has driven the evolution of colour-based antipredator defence strategies such as crypsis, masquerade, mimicry and aposematism. Individuals of many animals are generally considered to rely on a single type of defence strategy, but individuals of some species use multiple colour-based defences. Many animals switch between colour-based defences against visually-hunting predators during ontogeny. However, why this occurs remains poorly understood. The crab spider Phrynarachne ceylonica is an often-cited example of a...

Genotyping-by-sequencing-based identification of Arabidopsis pattern recognition receptor RLP32 recognizing proteobacterial translation initiation factor IF1

Li Fan, Katja Fröhlich, Eric Melzer, Detlef Weigel, Rory Pruitt, Isabell Albert, Lisha Zhang, Anna Joe, Chenlei Hua, Yanyue Song, Markus Albert, Cyril Zipfel, Rory N. Pruitt, Andrea A. Gust, Thorsten Nürnberger, Sang-Tae Kim & Eunyoung Chae
Activation of plant pattern-triggered immunity (PTI) relies on the recognition of microbe-derived structures, termed patterns, through plant-encoded surface-resident pattern recognition receptors (PRRs). We show that proteobacterial translation initiation factor 1 (IF1) triggers PTI in Arabidopsis thaliana and related Brassicaceae species. Unlike for most other immunogenic patterns, IF1 elicitor activity cannot be assigned to a small peptide epitope, suggesting that tertiary fold features are required for IF1 receptor activation. We have deployed natural variation in IF1...

Comment lutter contre la violence et le harcèlement à l'école et au collège ? Enseignements d'une expérimentation à grande échelle (Policy Brief, n°19)

Yann Algan, Nina Guyon & Elise Huillery
La violence entre pairs à l’école est un phénomène préoccupant, en particulier compte tenu du potentiel impact de long terme sur le devenir des enfants. Nous évaluons ici les effets d’un dispositif de « Médiation Sociale en Milieu Scolaire » (MSMS) visant à réduire la violence entre pairs. Grâce à un protocole expérimental par assignation aléatoire, nous montrons que les effets du programme sont très importants lorsqu’il est mis en place par des médiateurs assez...

Data from: Occurrence-habitat mismatching and niche truncation when modelling distributions affected by anthropogenic range contractions

Sean E. H. Pang
Aims: Human-induced pressures such as deforestation cause anthropogenic range contractions (ARCs). Such contractions present dynamic distributions that may engender data misrepresentations within species distribution models. The temporal bias of occurrence data—where occurrences represent distributions before (past bias) or after (recent bias) ARCs—underpins these data misrepresentations. Occurrence-habitat mismatching results when occurrences sampled before contractions are modelled with contemporary anthropogenic variables; niche truncation results when occurrences sampled after contractions are modelled without anthropogenic variables. Our understanding of...

Onthophagus babirussa sexual size dimporphism and male sexual trait files and R codes

Sean Yap & Kai Xin Toh
Sexual size dimorphism (SSD) arises when natural selection and sexual selection act differently on males and females. Male-biased SSD is rare in insects and usually indicates strong selection pressure on a population or species. Patterns of SSD can also vary between populations of species that are exposed to different environmental conditions, such as differing resource availability and diversity. Here, we investigate intra-specific variation in SSD as well as relative investment in precopulatory (horn length) and...

A community and functional comparison of coral and reef fish assemblages between four decades of coastal urbanisation and thermal stress.

Katie Cook, Hirotaka Yamagiwa, Maria Beger, Giovanni Masucci, Stuart Ross, Hui Yian Lee, Rick Stuart-Smith & James Reimer
Urbanised coral reefs experience anthropogenic disturbances caused by coastal development, pollution and nutrient runoff, resulting in turbid, marginal conditions in which only certain species can persist. Mortality effects are exacerbated by increasingly regular thermal stress events, leading to shifts towards novel communities dominated by habitat generalists and species with low structural complexity. There is limited data on the turnover processes that occur due to this convergence of anthropogenic stressors, and how novel urban ecosystems are...

A novel catapult mechanism for male spiders to avoid sexual cannibalism

Shichang Zhang, Yangjié Liu, Yubing Ma, Hao Wang, Yao Zhao, Matjaž Kuntner & Daiqin Li
The animal world provides numerous examples of mechanisms that allow for extremely fast actions or reactions via slowly storing energy, typically into elastic structures, that is then nearly instantly released 1-4, similar to the operation of a catapult. While these mechanisms are usually employed for prey capture1, 2 or for predator avoidance3,4, such superfast actions have not been reported as a mechanism to dodge sexual cannibalism. Here, we unveil a novel mechanism in a communal...

Semi‐quantitative metabarcoding reveals how climate shapes arthropod community assembly along elevation gradients on Hawaii Island

Jun Ying Lim, Jairo Patiño, Suzuki Noriyuki, Henrik Krehenwinkel, Luis Simmari, Rosemary Gillespie, Luis Cayetano & Rosemary G. Gillespie
Spatial variation in climatic conditions along elevation gradients provides an important backdrop by which communities assemble and diversify. Lowland habitats tend to be connected through time, whereas highlands can be continuously or periodically isolated, conditions that have been hypothesized to promote high levels of species endemism. This tendency is expected to be accentuated among taxa that show niche conservatism within a given climatic envelope. While species distribution modeling approaches have allowed extensive exploration of niche...

Data from: Evolution and biogeography of Memecylon

Prabha Amarasinghe, Sneha Joshi, Navendu Page, Lahiru S. Wijedasa, Mary Merello, Hashendra Kathriarachchi, Robert Douglas Stone, Walter Judd, Ullasa Kodandaramaiah & Nico Cellinese
Premise The woody plant group Memecylon (Melastomataceae) is a large clade occupying diverse forest habitats in the Old World tropics and exhibiting high regional endemism. Its phylogenetic relationships have been previously studied using ribosomal DNA with extensive sampling from Africa and Madagascar. However, divergence times, biogeography, and character evolution of Memecylon remain uninvestigated. We present a phylogenomic analysis of Memecylon to provide a broad evolutionary perspective of this clade. Methods One hundred supercontigs of 67...

Practical t-test Power Analysis with R

Teck Kiang Tan
Power analysis based on the analytical t-test is an important aspect of a research study to determine the sample size required to detect the effect for the comparison of two means. The current paper presents a reader-friendly procedure for carrying out the t-test power analysis using the various R add-on packages. While there is a growing of R users in the academic that uses R as the base for carrying out research, there is a...

Large-scale reforestation can increase water yield and reduce drought risk for water-insecure regions in the Asia-Pacific

Hoong Chen Teo, Srivatsan Raghavan, Xiaogang He, Zhenzhong Zeng, Yanyan Cheng, Xiangzhong Luo, Alex Lechner, Matthew Ashfold, Aakash Lamba, Rachakonda Sreekar, Qiming Zheng, Anping Chen & Lian Pin Koh
Large-scale reforestation can potentially bring both benefits and risks to the water cycle, which needs to be better quantified under future climates to inform reforestation decisions. We identified 477 water-insecure basins worldwide accounting for 44.6% (380.2 Mha) of the global reforestation potential. As many of these basins are in the Asia-Pacific, we used regional coupled land-climate modelling for the period 2041–2070 to reveal that reforestation increases evapotranspiration and precipitation for most water-insecure regions over the...

Pupal brain transcriptome for Bicyclus anynana

Heidi Connahs, Eunice Tan, Yiting Ter, Emilie Dion, Ashely Bear, Yuji Matsuoka & Antonia Monteiro
Seasonal plasticity in male courtship in Bicyclus anynana butterflies is due to variation in levels of the steroid hormone 20E (20-hydroxyecdysone) during pupation. Wet season (WS) males have high levels of 20E and become active courters. Dry season (DS) males, have lower levels of 20E and reduced courtship rates, although WS courtship rates can be achieved if DS male pupae are injected with 20E at 30% of pupation. Here, we investigated the genes involved in...

The yellow gene regulates behavioral plasticity by repressing male courtship in Bicyclus anynana butterflies

Yi Ting Ter, Heidi Connahs, Eunice Tan, Emilie Dion, Yuji Matsuoka, Ashley Bear & Antonia Monteiro
Seasonal plasticity in male courtship in Bicyclus anynana butterflies is due to variation in levels of the steroid hormone 20E (20-hydroxyecdysone) during pupation. Wet season (WS) males have high levels of 20E and become active courters. Dry season (DS) males, have lower levels of 20E and reduced courtship rates, although WS courtship rates can be achieved if DS male pupae are injected with 20E at 30% of pupation. Here we investigated the genes involved in...

Crop heterogeneity is positively associated with beneficial insect diversity in subtropical farmlands

Eben Goodale, Tharaka S. Priyadarshana, Myung-Bok Lee, John S. Ascher & Lu Qiu
Increasing crop configurational heterogeneity – smaller crop fields with more field margins – has been repeatedly found to support farmland biodiversity. But research on compositional crop heterogeneity – the number and evenness of crop types – has usually shown only weak effects. However, much of this research has been conducted in large-scale temperate agroecosystems. We examined smallholder subtropical agroecosystems in southern China to assess the effects of crop heterogeneity on beneficial insect biodiversity. In addition...

Impact of the Experimental Parameters on Catalytic Activity when Preparing Polymer Protected Bimetallic Nanoparticle Catalysts on Activated Carbon - data

Charlie B Paris, David J Morgan, Qian He & Daniel Hewes
Herein is all of the original research data for the paper "Impact of the Experimental Parameters on Catalytic Activity when Preparing Polymer Protected Bimetallic Nanoparticle Catalysts on Activated Carbon" This includes Raw XPS data, Raw XRD data, Carbon analysis data and catalysis testing data. The XPS data is supplied in a VAMAS (.VMS) standard spectroscopy transfer file format, which is defined in the international ISO standard 14976:1998. The data is an ASCII based text file...

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Affiliations

  • National University of Singapore
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  • Catholic University of Korea
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  • Guangdong Academy of Sciences
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  • University of Tasmania
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  • Indian Institute of Science Education and Research, Thiruvananthapuram
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