21 Works

Data from: Antagonistic coevolution between quantitative and Mendelian traits

Masato Yamamichi & Stephen P. Ellner
Coevolution is relentlessly creating and maintaining biodiversity, and therefore has been a central topic in evolutionary biology. Previous theoretical studies have mostly considered coevolution between genetically symmetric traits (i.e., coevolution between two continuous quantitative traits or two discrete Mendelian traits). However, recent empirical evidence indicates that coevolution can occur between genetically asymmetric traits (e.g., between quantitative and Mendelian traits). We examine consequences of antagonistic coevolution mediated by a quantitative predator trait and a Mendelian prey...

Data from: Geographical variation in the heterogeneity of mutualistic networks

Shoko Sakai, Sören Metelmann, Yukihiko Toquenaga & Arndt Telshow
Plant–animal mutualistic networks are characterized by highly heterogeneous degree distributions. The majority of species interact with few partner species, while a small number are highly connected to form network hubs that are proposed to play an important role in community stability. It has not been investigated, however, if or how the degree distributions vary among types of mutualisms or communities, or between plants and animals in the same network. Here, we evaluate the degree distributions...

Data from: Disentangling relationships between plant diversity and decomposition processes under forest restoration

Saori Fujii, Akira S. Mori, Dai Koide, Kobayashi Makoto, Shunsuke Matsuoka, Takashi Osono & Forest Isbell
Biodiversity has been elucidated to be one of the major factors sustaining ecosystem functioning. The vast majority of studies showing a relationship between biodiversity and ecosystem functioning have come from experiments, and this knowledge has not yet been applied to most real-world cases of conservation and management. This is especially true in forest ecosystems, characterized by the dominance of long-lived organisms (trees) and high levels of structural complexity and environmental heterogeneity. To apply biodiversity–function relationships...

Data from: An aquatic vertebrate can use amino acids from environmental water

Noboru Katayama, Kobayashi Makoto & Osamu Kishida
Conventional food-web theory assumes that nutrients from dissolved organic matter are transferred to aquatic vertebrates via long nutrient pathways involving multiple eukaryotic species as intermediary nutrient transporters. Here, using larvae of the salamander Hynobius retardatus as a model system, we provide experimental evidence of a shortcut nutrient pathway by showing that H. retardatus larvae can use dissolved amino acids for their growth without eukaryotic mediation. First, to explore which amino acids can promote larval growth,...

Data from: Ligation of glycophorin A generates reactive oxygen species leading to decreased red blood cell function

Joseph Khoory, Jessica Estanislau, Abdallah Elkhal, Asmae Lazaar, Mark I. Melhorn, Abigail Brodsky, Ben Illigens, Itaru Hamachi, Yasutaka Kurishita, Alexander R. Ivanov, Sergey Shevkoplyas, Nathan I. Shapiro & Ionita C. Ghiran
Acute, inflammatory conditions associated with dysregulated complement activation are characterized by significant increases in blood concentration of reactive oxygen species (ROS) and ATP. The mechanisms by which these molecules arise are not fully understood. In this study, using luminometric- and fluorescence-based methods, we show that ligation of glycophorin A (GPA) on human red blood cells (RBCs) results in a 2.1-fold, NADPH-oxidase-dependent increase in intracellular ROS that, in turn, trigger multiple downstream cascades leading to caspase-3...

Data from: A test of the effects of timing of a pulsed resource subsidy on stream ecosystems

Takuya Sato, Rana El-Sabaawi, Kirsten Campbell, Tamihisa Ohta, John S. Richardson & Rana W. El-Sabaawi
Spatial resource subsidies can alter bottom-up and top-down forces of community regulation across ecosystem boundaries. Most subsidies are temporally variable, and recent theory has suggested that consumer-resource dynamics can be stabilized if the peak timing of a subsidy is desynchronized with that of prey productivity in the recipient ecosystem. However, magnitude of consumer responses per se could depend on the subsidy timing, which may be a critical component for community dynamics and ecosystem processes. The...

Data from: How many broadleaved trees are enough in conifer plantations? The economy of land sharing, land sparing, and quantitative targets

Yuichi Yamaura, Yasushi Shoji, Yasushi Mitsuda, Hajime Utsugi, Takahiro Tsuge, Koichi Kuriyama & Futoshi Nakamura
1. For biodiversity conservation to be an effective and significant social investment, non-marketed values of biodiversity conservation and its associated opportunity costs should be evaluated in monetary terms. 2. In this study, we measured the willingness to pay (WTP) for bird abundance using a choice experiment (CE) based on the random utility model. We performed a cost–benefit analysis to identify the optimal proportion of broad-leaved trees in conifer plantations on a volume basis to maximize...

Data from: Factors affecting Japanese retirees’ healthcare service utilisation in Malaysia – a qualitative study

Ayako Kohno, Nik Daliana Nik Farid, Ghazali Musa, Norlaili Abdul Aziz, Takeo Nakayama & Maznah Dahlui
Objective: Living overseas in another culture, the retirees need to adapt to new environment but often this causes difficulties, particularly among the elderly who are having health problems. This study aims to examine factors affecting healthcare service utilisation among Japanese retirees in Malaysia. Design: We conducted focus group discussions with Japanese retirees and in-depth interviews with government officials, travel agents, hospital managers and Japanese interpreters in the selected private hospitals. Guided by the Andersen Healthcare...

Data from: Sexual selection of male parental care in giant water bugs

Shin-Ya Ohba, Noboru Okuda & Shin-Ichi Kudo
Paternal care can be maintained under sexual selection, if it helps in attracting more mates. We tested the hypothesis in two giant water bug species, Appasus major and Appasus japonicus, that male parental care is sexually selected through female preference for caring males. Females were given an opportunity to choose between two males. In the first test of female mate choice, one male carried eggs on its back, while the other did not. The egg...

Data from: Functional characterization of the TAS2R38 bitter taste receptor for phenylthiocarbamide in colobine monkeys

Laurentia Henrieta Permita Sari Purba, Kanthi Arum Widayati, Kei Tsutsui, Nami Suzuki-Hashido, Takashi Hayakawa, Sarah Nila, Bambang Suryobroto & Hiroo Imai
Bitterness perception in mammals is mostly directed at natural toxins that induce innate avoidance behaviours. Bitter taste is mediated by the G protein-coupled receptor TAS2R, which is located in taste cell membranes. One of the best-studied bitter taste receptors is TAS2R38, which recognizes phenylthiocarbamide (PTC). Here we investigate the sensitivities of TAS2R38 receptors to PTC in four species of leaf-eating monkeys (subfamily Colobinae). Compared with macaque monkeys (subfamily Cercopithecinae), colobines have lower sensitivities to PTC...

Data from: Evaluation of the phase-dependent rhythm control of human walking using phase response curves

Tetsuro Funato, Yuki Yamamoto, Shinya Aoi, Takashi Imai, Toshio Aoyagi, Nozomi Tomita & Kazuo Tsuchiya
Humans and animals control their walking rhythms to maintain motion in a variable environment. The neural mechanism for controlling rhythm has been investigated in many studies using mechanical and electrical stimulation. However, quantitative evaluation of rhythm variation in response to perturbation at various timings has rarely been investigated. Such a characteristic of rhythm is described by the phase response curve (PRC). Dynamical simulations of human skeletal models with changing walking rhythms (phase reset) described a...

Data from: A rapid and scalable method for multilocus species delimitation using Bayesian model comparison and rooted triplets

Tomochika Fujisawa, Amr Aswad & Timothy G. Barraclough
Multilocus sequence data provide far greater power to resolve species limits than the single locus data typically used for broad surveys of clades. However, current statistical methods based on a multispecies coalescent framework are computationally demanding, because of the number of possible delimitations that must be compared and time-consuming likelihood calculations. New methods are therefore needed to open up the power of multilocus approaches to larger systematic surveys. Here, we present a rapid and scalable...

Data from: A molecular phylogeny and revised higher-level classification for the leaf-mining moth family Gracillariidae and its implications for larval host-use evolution

Akito Y. Kawahara, David Plotkin, Issei Ohshima, Carlos Lopez-Vaamonde, Peter R. Houlihan, Jesse W. Breinholt, Atsushi Kawakita, Lei Xiao, Jerome C. Regier, Donald R. Davis, Tosio Kumata, Jay-Cheon Sohn, Jurate De Prins, Charles Mitter & JAE-CHEON SOHN
Gracillariidae are one of the most diverse families of internally feeding insects, and many species are economically important. Study of this family has been hampered by lack of a robust and comprehensive phylogeny. In the present paper, we sequenced up to 22 genes in 96 gracillariid species, representing all previously recognized subfamilies and genus groups, plus 20 outgroups representing other families and superfamilies. Following objective identification and removal of two rogue taxa, two datasets were...

Data from: Predicting biotic interactions and their variability in a changing environment

Kohmei Kadowaki, Claire G. Barbera, William Godsoe, Frédéric Delsuc & Nicolas Mouquet
Global environmental change is altering the patterns of biodiversity worldwide. Observation and theory suggest that species' distributions and abundances depend on a suite of processes, notably abiotic filtering and biotic interactions, both of which are constrained by species' phylogenetic history. Models predicting species distribution have historically mostly considered abiotic filtering and are only starting to integrate biotic interaction. However, using information on present interactions to forecast the future of biodiversity supposes that biotic interactions will...

Data from: Biotic resistance to an alien amphibian: larval competition between Japanese frogs and invasive cane toads

Takashi Haramura, Hirohiko Takeuchi, Michael R. Crossland & Richard Shine
Understanding negative effects of native species on introduced taxa may suggest novel ways to control the invasive species by enhancing such effects. Previous studies have reported that the larvae of invasive cane toads (Rhinella marina) are suppressed by competition with the larvae of native anurans in Australia, but not in North America. We conducted laboratory trials to measure the effect of exposure to the larvae of Japanese frogs (Microhyla ornata, Fejervarya sakishimensis, Rhacophorus owstoni) on...

Data from: Regeneration processes on coarse woody debris in mixed forests: do tree germinants and seedlings have species-specific responses when grown on coarse woody debris?

Olga Orman, Michał Adamus & Janusz Szewczyk
Tree regeneration on coarse woody debris (CWD) is considered to be one the most ecologically valuable aspects of CWD in forest systems. However, most studies have focused solely on uncovering the differences in establishment and growth on CWD (regarded as a homogeneous substrate) in comparison with the forest floor. Our study concentrates on the underlying mechanisms of germinant and seedling colonization patterns and demographic responses relative to various properties of CWD. We analysed the effects...

Data from: Nuclear DNA based species delineations of Coccus scale insects in symbiosis with plants and ants, and the role of plant epicuticular wax in structuring associations

Swee-Peck Quek, Shouhei Ueda, Penny J. Gullan, Takumasa Kondo, Mitsuru Hattori, Takao Itioka, Kaori Murase & Takao Itino
We undertook phylogenetic analysis of nuclear DNA to elucidate species boundaries in the symbiotic Coccus scale insects associated with mutualistic Crematogaster ants and Macaranga plants occurring in the ever-wet forests of Southeast Asia. The coccid specimens clustered into ten lineages, each corresponding to a morphospecies assignment. The lineage identified as C. secretus was separated from the Main Clade by an outgroup. We also examined all pairwise associations among the three symbiont guilds to understand how...

Data from: Toxin-resistant isoforms of Na+/K+-ATPase in snakes do not closely track dietary specialization on toads

Shabnam Mohammadi, Zachariah Gompert, Jonathan Gonzalez, Hirohiko Takeuchi, Akira Mori & Alan H. Savitzky
Toads are chemically defended by bufadienolides, a class of cardiotonic steroids that exert toxic effects by binding to and disabling the Na+/K+-ATPases of cell membranes. Some predators, including a number of snakes, have evolved resistance to the toxic effects of bufadienolides and prey regularly on toads. Resistance in snakes to the acute effects of these toxins is conferred by at least two amino acid substitutions in the cardiotonic steroid binding pocket of the Na+/K+-ATPase. We...

Data from: The evolution of cooperation by negotiation in a noisy world

Koichi Ito, John M. McNamara, Atsushi Yamauchi & Andrew D. Higginson
Cooperative interactions among individuals are ubiquitous despite the possibility of exploitation by selfish free-riders. One mechanism that may promote cooperation is “negotiation”: individuals altering their behaviour in response to the behaviour of others. Negotiating individuals decide their actions through a recursive process of reciprocal observation, thereby reducing the possibility of free-riding. Evolutionary games with response rules have shown that infinitely many forms of the rule can be evolutionarily stable simultaneously, unless there is variation in...

Data from: Influence of leaf trichomes on boundary layer conductance and gas-exchange characteristics in Metrosideros polymorpha (Myrtaceae)

Gaku Amada, Yusuke Onoda, Tomoaki Ichie & Kanehiro Kitayama
The amount of trichomes on the leaves of Metrosideros polymorpha varies enormously, ranging from 0 to ca 150 g/m2 across environmental gradients on the island of Hawaii. Pubescent individuals are abundant in dry areas or on young lava flows, whereas glabrous individuals are abundant in wet areas or on developed soils. To understand the adaptive advantages of pubescent individuals in arid environments, we addressed the following questions: (1) whether leaf trichomes increase the boundary layer...

Data from: Variation in ligand responses of the bitter taste receptors TAS2R1 and TAS2R4 among New World monkeys

Kei Tsutsui, Masahiro Otoh, Kodama Sakurai, Nami Suzuki-Hashido, Takashi Hayakawa, Takumi Misaka, Yoshiro Ishimaru, Filippo Aureli, Amanda D. Melin, Shoji Kawamura & Hiroo Imai
Background: New World monkeys (NWMs) are unique in that they exhibit remarkable interspecific variation in color vision and feeding behavior, making them an excellent model for studying sensory ecology. However, it is largely unknown whether non-visual senses co-vary with feeding ecology, especially gustation, which is expected to be indispensable in food selection. Bitter taste, which is mediated by bitter taste receptors (TAS2Rs) in the tongue, helps organisms avoid ingesting potentially toxic substances in food. In...

Registration Year

  • 2016

Resource Types

  • Dataset


  • Kyoto University
  • Hokkaido University
  • French National Centre for Scientific Research
  • Nagasaki University
  • Lincoln University
  • Utah State University
  • Kyoto Prefectural University
  • Naruto University of Education
  • University of Münster
  • University of Malaya