11 Works

Temporal and interspecific dietary variation in wintering ducks in agricultural landscapes

Haruko Ando, Susumu Ikeno, Ayu Narita, Taketo Komura, Atsushi Takada, Yuji Isagi, Tomomi Inoue & Akio Takenaka
Farmlands are becoming more important as waterfowl foraging habitats, while natural wetlands are being lost globally. However, it is unclear how waterfowl coexist in agricultural landscapes by resource partitioning. We evaluated the diets of seven sympatric dabbling ducks foraging in rice paddy and lotus fields around Lake Kasumigaura, the second largest lake in Japan, during two wintering seasons (from November to February) by fecal DNA metabarcoding using chloroplast trnL and mitochondrial CO1 region sequences. We...

Areal (+)-borneol modulates root morphology, auxin signalling and meristematic activity in Arabidopsis roots

Junji Takabayashi, Kyohei Fukuda, Masayoshi Uefune, Hidehiro Fukaki, Yasuo Yamauchi, Ikuko Hara-Nishimura, Rika Ozawa, Kenji Matsui, Kazunori Okada, Ryozo Imai, Kenshi Takahashi, Shinichi Enami, Rene Wurst & Junji Takabayashi
One of the characteristic aspects of odour sensing in humans is the activation of olfactory receptors in a slightly different manner to different enantiomers. Here, we focused on whether plants showed enantiomer-specific responses similar to that in humans. We exposed Arabidopsis seedlings to methanol (control) and (+)- or (−)-borneol, and found that only (+)-borneol reduced the root length. Furthermore, the root-tip width was more increased upon (+)-borneol exposure than upon (−)-borneol exposure. In addition, root-hair...

Has long-distance flight ability been maintained by pigeons in highly insular habitats?

Daichi Tsujimoto, Haruko Ando, Hajime Suzuki, Kazuo Horikoshi, Nobuyoshi Nakajima, Yoshihisa Suyama, Ayumi Matsuo, Chieko Fujii & Yuji Isagi
Aim: A reduction in dispersal ability has been thought to be a general trend for island land birds because of their physical isolation to a limited area, scarcity of predators, and ability to forage without flight in island habitats. However, recent studies have indicated that long-distance dispersal among island habitats may be maintained in island pigeon populations, which may be related to unstable food resource availability on a single island. Here, we investigated whether pigeons...

The oceanographic isolation of the Ogasawara Islands and genetic divergence in a reef-building coral

Patricia H Wepfer, Yuichi Nakajima, Atsushi Fujimura, Alexander S. Mikheyev, Evan P. Economo & Satoshi Mitarai
Aim: Due to their spatial isolation, oceanic islands are natural systems to study evolutionary divergence. The Ogasawara Islands belong to the most isolated archipelagos on Earth and are well-known for their high terrestrial endemicity, however, less is known about the marine realm. Here, we analyze the degree of oceanographic isolation of the archipelago based on genetic data of a reef-building coral and a biophysical dispersal model. Location: North-Western Pacific (Ogasawara, Ryukyu, Daito Islands, Guam) Taxon:...

Dataset from: A curated DNA barcode reference library for parasitoids of northern European cyclically outbreaking geometrid moths

Tommi Nyman, Saskia Wutke, Elina Koivisto, Tero Klemola, Mark Shaw, Tommi Andersson, Håkon Haraldseide, Snorre Hagen, Ryosuke Nakadai & Kai Ruohomäki
Large areas of forests are annually damaged or destroyed by outbreaking insect pests. Understanding the factors that trigger and terminate such population eruptions has become crucially important, as plants, plant-feeding insects, and their natural enemies may respond differentially to the ongoing changes in the global climate. In northernmost Europe, climate-driven range expansions of the geometrid moths Epirrita autumnata and Operophtera brumata have resulted in overlapping and increasingly severe outbreaks. Delayed density-dependent responses of parasitoids are...

Data from: Underlying geology and climate interactively shape climate change refugia in mountain streams

Nobuo Ishiyama, Masanao Sueyoshi, Jorge Garcia Molinos, Kenta Iwasaki, Junjiro N Negishi, Itsuro Koizumi, Shigeya Nagayama, Akiko Nagasaka, Yu Nagasaka & Futoshi Nakamura
Identifying climate-change refugia is a key adaptation strategy for reducing global warming impacts. Knowledge of the effects of underlying geology on thermal regime along climate gradients and the ecological responses to the geology-controlled thermal regime is essential to plan appropriate climate adaptation strategies. In the present study, the dominance of volcanic rocks in the watershed is used as a landscape-scale surrogate for cold groundwater inputs to clarify the importance of underlying geology in stream ecosystems...

Dataset and R code from: Positive and negative effects of land abandonment on butterfly communities revealed by a hierarchical sampling design across climatic regions

Keita Fukasawa, Naoki Sugimoto, Akio Asahara, Minoru Kasada, Misako Matsuba & Tadashi Miyashita
Land abandonment may decrease biodiversity but also provides an opportunity for rewilding. It is therefore necessary to identify areas that may benefit from traditional land management practices and those that may benefit from a lack of human intervention. In this study, we conducted comparative field surveys of butterfly occurrence in abandoned and inhabited settlements in 18 regions of diverse climatic zones in Japan to test the hypotheses that species-specific responses to land abandonment correlate with...

Data from: Recovery of macrobenthic communities in tidal flats following the Great East Japan Earthquake

Jotaro Urabe, Takeshi Yuhara, Takao Suzuki, Tatsuki Nishita, Junichi Murakami, Wataru Makino, , Kyoko Kinoshita, Natsuru Yasuno & Takashi Uchino
Extreme geo-climatic events can occur everywhere in the world. The Great East Japan Earthquake, with a moment magnitude scale of 9.0 M on March 11, 2011, was one of these events and caused huge tsunamis that changed largely tidal communities on the Pacific coast of eastern Japan. However, subsequent long-term changes in the communities after such an extreme geo-climatic event have rarely been examined. Therefore, we performed the biological monitoring over a ten-year span, before...

Estimation of breeding population size using DNA-based pedigree reconstruction in brown bears

Michito Shimozuru, Mina Jimbo, Keisuke Adachi, Kei Kawamura, Yuri Shirane, Yoshihiro Umemura, Tsuyoshi Ishinazaka, Masanao Nakanishi, Mayu Kiyonari, Masami Yamanaka, Yukihiro Amagai, Ayaho Ijuin, Tomoki Sakiyama, Shinsuke Kasai, Takane Nose, Masataka Shirayanagi, Hifumi Tsuruga, Tsutomu Mano, Toshio Tsubota, Keita Fukasawa & Hiroyuki Uno
Robust estimates of demographic parameters are critical for effective wildlife conservation and management, but are difficult to obtain for elusive species. We estimated the breeding and adult population sizes, as well as the minimum population size, in a high-density brown bear population on the Shiretoko Peninsula, in Hokkaido, Japan, using DNA-based pedigree reconstruction. A total of 1,288 individuals, collected in and around the Shiretoko Peninsula between 1998 and 2020, were genotyped at 21 microsatellite loci....

Data from: Mate choice for body size leads to size assortative mating in the Ryukyu Scops Owl Otus elegans

Akira Sawada, Tetsuya Iwasaki, Kana Akatani & Masaoki Takagi
Understanding evolutionary phenomena that involve size assortative mating, requires elucidating the generating mechanisms on which assortment is based. Although various mechanisms have been suggested, their relative importance may differ across taxonomic groups. Males selecting for large, fecund females combined with the dominance of large males in the competition for females, has been suggested as a major mechanism in specific groups. However, raptors do not appear to conform to this, because the selection for smallness among...

TCCON data from Saga (JP), Release GGG2020.R0

K. Shiomi, S. Kawakami, H. Ohyama, K. Arai, H. Okumura, H. Ikegami & M. Usami
The Total Carbon Column Observing Network (TCCON) is a network of ground-based Fourier Transform Spectrometers that record direct solar absorption spectra of the atmosphere in the near-infrared. From these spectra, accurate and precise column-averaged abundances of atmospheric constituents including CO2, CH4, N2O, HF, CO, H2O, and HDO, are retrieved. This is the GGG2020 data release of observations from the TCCON station at Saga, Japan

Registration Year

  • 2022

Resource Types

  • Dataset


  • National Institute for Environmental Studies
  • Tohoku University
  • Hokkaido Research Organization
  • Hokkaido University
  • Kyoto University
  • University of Tokyo
  • University of Guam
  • University of Eastern Finland
  • Tokyo University of Agriculture and Technology
  • National Agriculture and Food Research Organization