8 Works

Data from: Balanced genetic diversity improves population fitness

Yuma Takahashi, Ryoya Tanaka, Daisuke Yamamoto, Noriyuki Suzuki, Masakado Kawata & Suzuki Noriyuki
Although genetic diversity within a population is suggested to improve population-level fitness and productivity, the existence of these effects is controversial because empirical evidence for an ecological effect of genetic diversity and the underlying mechanisms is scarce and incomplete. Here, we show that the natural single-gene behavioural polymorphism (Rover and sitter) in Drosophila melanogaster has a positive effect on population fitness. Our simple numerical model predicted that the fitness of a polymorphic population would be...

Data from: Habitat filtering determines the functional niche occupancy of plant communities worldwide

Yuanzhi Li, Bill Shipley, Jodi N. Price, Vinícius De L. Dantas, Riin Tamme, Mark Westoby, Andrew Siefert, Brandon S. Schamp, Marko J. Spasojevic, Vincent Jung, Daniel C. Laughlin, Sarah J. Richardson, Yoann Le Bagousse-Pinguet, Christian Schöb, Antonio Gazol, Honor C. Prentice, Nicolas Gross, Jacob Overton, Marcus V. Cianciaruso, Frédérique Louault, Chiho Kamiyama, Tohru Nakashizuka, Kouki Hikosaka, Takehiro Sasaki, Masatoshi Katabuchi … & Marco A. Batalha
How the patterns of niche occupancy vary from species-poor to species-rich communities is a fundamental question in ecology that has a central bearing on the processes that drive patterns of biodiversity. As species richness increases, habitat filtering should constrain the expansion of total niche volume, while limiting similarity should restrict the degree of niche overlap between species. Here, by explicitly incorporating intraspecific trait variability, we investigate the relationship between functional niche occupancy and species richness...

Data from: Understanding the stoichiometric limitation of herbivore growth: the importance of feeding and assimilation flexibilities

Jotaro Urabe, Yuichiro Shimizu & Toshiyasu Yamaguchi
Ecological stoichiometry suggests that herbivore growth is limited by phosphorus when this element in the diet is < 8.6 µgP mg C-1 (C:P atomic ratio >300). However, in nature, it is not necessarily related to the relative phosphorus content in diets. This may be the result of complex feeding and assimilation responses to diets. We examined these possibilities using herbivorous plankton fed mono-specific and mixed algae varying in phosphorus content of 1.6 to 8.1 µgP...

Data from: Criticism by community people and poor workplace communication as risk factors for the mental health of local welfare workers after the Great East Japan Earthquake: a cross-sectional study

Ikki Ueda, Atsushi Sakuma, Yoko Takahashi, Wataru Shoji, Ayami Nagao, Mikika Abe, Yuriko Suzuki, Hiroo Matsuoka & Kazunori Matsumoto
After a large-scale natural disaster, demand for social welfare services increases, and the mental health of local social welfare workers becomes a matter of great concern because of their dual role as support providers and disaster survivors. We examined whether work-related social stressors, including criticism by community people and poor workplace communication, were associated with increased risk of post-traumatic stress disorder (PTSD), depression, or psychological distress 20-22 months after the Great East Japan Earthquake (GEJE;...

Data from: Physiological conditions and genetic controls of phaeomelanin pigmentation in nestling barn swallows

Emi Arai, Masaru Hasegawa, Takashi Makino, Akihiko Hagino, Yusuke Sakai, Hajime Ohtsuki, Kazumasa Wakamatsu & Masakado Kawata
Phaeomelanin is a common pigment that confers a reddish color to animals. Since phaeomelanogenesis requires the sulfhydryl group from cysteine or glutathione (GSH), which is an important antioxidant, this pigmentation and the associated coloration may be an honest signal, whereby only high-quality individuals (e.g., with lower oxidative stress) are able to develop showy plumage. The present study tested the mechanisms underlying the honest signal hypothesis using nestling barn swallows, Hirundo rustica gutturalis, which exhibit phaeomelanic...

Data from: Calcium dynamics regulating the timing of decision-making in C. elegans

Yuki Tanimoto, Akiko Yamazoe-Umemoto, Kosuke Fujita, Yuya Kawazoe, Yosuke Miyanishi, Shuhei J. Yamazaki, Xianfeng Fei, Karl Emanuel Busch, Keiko Gengyo-Ando, Junichi Nakai, Yuichi Iino, Yuishi Iwasaki, Koichi Hashimoto & Koutarou D. Kimura
Brains regulate behavioral responses with distinct timings. Here we investigate the cellular and molecular mechanisms underlying the timing of decision-making during olfactory navigation in Caenorhabditis elegans. We find that, based on subtle changes in odor concentrations, the animals appear to choose the appropriate migratory direction from multiple trials as a form of behavioral decision-making. Through optophysiological, mathematical and genetic analyses of neural activity under virtual odor gradients, we further find that odor concentration information is...

Data from: Genet dynamics of a regenerating dwarf bamboo population across heterogeneous light environments in a temperate forest understorey

Ayumi Matsuo, Hiroshi Tomimatsu, Yushin Sangetsu, Yoshihisa Suyama & Akifumi Makita
Despite the advantage of plant clonality in patchy environments, studies focusing on genet demography in relation to spatially heterogeneous environments remain scarce. Regeneration of bamboos in forest understoreys after synchronous die-off provides an opportunity for assessing how they come to proliferate across heterogeneous light environments. In a Japanese forest, we examined genet demography of a population of Sasa kurilensis over a 7-year period starting 10 years after die-off, shortly after which some genets began spreading...

Data from: Anatomy and affinities of a new 535-million-year-old medusozoan from the Kuanchuanpu Formation, South China

Xing Wang, Jian Han, Jean Vannier, Qiang Ou, Xiaoguang Yang, Kentaro Uesugi, Osamu Sasaki & Tsuyoshi Komiya
We describe here Sinaster petalon gen. et sp. nov., a new embryonic form from the c. 535 million-year-old Kuanchuanpu Formation of South China (Ningqiang, Shaanxi Province). The excellent three-dimensional, phosphatic preservation of these microfossils allowed us to use x-ray microtomographic techniques to make accurate reconstructions of their internal structures and to compare their anatomy point-by-point with that of extant cnidarians and other animal groups. Sinaster petalon has anatomical features typical of extant Medusozoa (Cnidaria), such...

Registration Year

  • 2017

Resource Types

  • Dataset


  • Tohoku University
  • Chiba University
  • University of Tokyo
  • Helmholtz Centre for Environmental Research
  • Universidade Federal de Goiás
  • Tohoku University Hospital
  • Université de Sherbrooke
  • Federal University of São Carlos
  • Ibaraki University
  • Charles Sturt University