Zobrazeno 1 - 10
of 161
pro vyhledávání: '"Ichiro Tayasu"'
Autor:
Masayuki Morohashi, Tatsuyoshi Saito, Masaaki Takahashi, Yayoi Inomata, Makoto Nakata, Masaki Ohno, Tomohiro Kose, Tsuyoshi Ohizumi, Ki-Cheol Shin, Ichiro Tayasu, Hiroyuki Sase
Publikováno v:
Asian Journal of Atmospheric Environment, Vol 18, Iss 1, Pp 1-15 (2024)
Abstract Trace elements released into the atmosphere by human activities, such as fossil fuel combustion, flow into forest ecosystems via wet and dry deposition and can flow out via mountainous stream water. The Kajikawa catchment site in Niigata Pre
Externí odkaz:
https://doaj.org/article/0b260eedfbec421e9cd4ed67a6557b30
Publikováno v:
Journal of Hydrology: Regional Studies, Vol 55, Iss , Pp 101920- (2024)
Study region: The middle and lower reaches of the Fuji River system, Central Japan Study focus: The increase in turbidity over the last decade is considered a major cause of habitat degradation of aquatic organisms in the Fuji River and the adjacent
Externí odkaz:
https://doaj.org/article/73ba077a05384152b428316474405586
Autor:
Yosuke Ohno, Yu Umezawa, Takeshi Okunishi, Ryuji Yukami, Yasuhiro Kamimura, Chikage Yoshimizu, Ichiro Tayasu
Publikováno v:
Frontiers in Marine Science, Vol 10 (2023)
Inter-annual variation in the feeding habits and food sources of Japanese sardine and mackerel at age-0 and age-1+ caught in the Kuroshio-Oyashio transition zone of the Western North Pacific were investigated based on analyses of bulk stable isotopes
Externí odkaz:
https://doaj.org/article/76c3121213c3461abc57307f50a0164d
Publikováno v:
Ecology and Evolution, Vol 13, Iss 9, Pp n/a-n/a (2023)
Abstract The analysis of otolith Sr isotope ratios (87Sr/86Sr) is a powerful method to study fish migration in freshwater areas. However, few studies have applied this method to study fish movement in brackish‐water environments. Furthermore, despi
Externí odkaz:
https://doaj.org/article/3325b6bede254445ac5b65f6f1fc30bf
Autor:
Kai Nils Nitzsche, Shigeyuki Wakaki, Katsuyuki Yamashita, Ki‐Cheol Shin, Yoshikazu Kato, Hiromitsu Kamauchi, Ichiro Tayasu
Publikováno v:
Ecosphere, Vol 13, Iss 2, Pp n/a-n/a (2022)
Abstract Recent studies showed the potential of stable isotopes of the macronutrient calcium (δ44/40Ca) and nonessential strontium (δ88/86Sr) as new trophic level indicators in terrestrial vertebrates and marine teleost fishes. In this study, we te
Externí odkaz:
https://doaj.org/article/1070426ac3a242d5b87edf7a9349e079
Autor:
Chia‐Ying Ko, Satoshi Asano, Meng‐Ju Lin, Tohru Ikeya, Elfritzson M. Peralta, Ellis Mika C. Triño, Yoshitoshi Uehara, Takuya Ishida, Tomoya Iwata, Ichiro Tayasu, Noboru Okuda
Publikováno v:
Ecosphere, Vol 12, Iss 5, Pp n/a-n/a (2021)
Abstract Agriculture is one of the most critical anthropogenic disturbances to freshwater ecosystems globally. In monsoon Asia, rice paddies provide habitats for aquatic species, but how their associated irrigation systems can affect downstream ecosy
Externí odkaz:
https://doaj.org/article/f05b33c4a28e4fdeb6d7f5c2bcb547dc
Publikováno v:
PLoS ONE, Vol 16, Iss 10, p e0257818 (2021)
Stable isotope mixing models (SIMMs) provide a powerful methodology for quantifying relative contributions of several sources to a mixture. They are widely used in the fields of ecology, geology, and archaeology. Although SIMMs have been rapidly evol
Externí odkaz:
https://doaj.org/article/6cb04a94d2ad4c7782429c44e0ee1fd3
Magnesium and zinc stable isotopes as a new tool to understand Mg and Zn sources in stream food webs
Autor:
Kai Nils Nitzsche, Ki‐Cheol Shin, Yoshikazu Kato, Hiromitsu Kamauchi, Shotaro Takano, Ichiro Tayasu
Publikováno v:
Ecosphere, Vol 11, Iss 8, Pp n/a-n/a (2020)
Abstract Non‐traditional stable isotopes of metals were recently shown as new dietary tracers in terrestrial and marine mammals. Whether these metal stable isotopes can be used to understand feeding habits in stream food webs is not known yet. In t
Externí odkaz:
https://doaj.org/article/71092f282dd54fa19c13211f9b528ae4
Autor:
Naoto F. Ishikawa, Yoshito Chikaraishi, Naohiko Ohkouchi, Aya R. Murakami, Ichiro Tayasu, Hiroyuki Togashi, Jun-ichi Okano, Yoichiro Sakai, Tomoya Iwata, Michio Kondoh, Noboru Okuda
Publikováno v:
Scientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
Abstract The relationship between biodiversity and ecosystem functioning is an important theme in environmental sciences. We propose a new index for configuration of the biomass pyramid in an ecosystem, named integrated trophic position (iTP). The iT
Externí odkaz:
https://doaj.org/article/48c8da88b29748da8a02b4ea4b49103c
Publikováno v:
Ecology and Evolution, Vol 6, Iss 19, Pp 6817-6823 (2016)
Abstract Vertical seed dispersal, which plays a key role in plant escape and/or expansion under climate change, was recently evaluated for the first time using negative correlation between altitudes and oxygen isotope ratio of seeds. Although this me
Externí odkaz:
https://doaj.org/article/495598732c074e57b8dc7a76c1f1f079