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D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Ecology and Evolution 39 6427 6203 42 41 252 5354

Ichiro Tayasu publications per year

The chart shows the history of publications by Ichiro Tayasu between 1994 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Ichiro Tayasu published across 33 years, from 1994 to 2026, averaging 8.1 papers a year. Output peaked at 22 publications in 2016. 16 of the 268 publications appeared in the last two years.

No. of publications
5 10 15 20
Bar chart. Horizontal axis: year, 1994 to 2026. Vertical axis: number of publications, 0 to 22. Peak 22 publications in 2016. 1994: 1 publication 1995: 1 publication 1996: 1 publication 1997: 2 publications 1998: 4 publications 1999: 0 publications 2000: 3 publications 2001: 2 publications 2002: 3 publications 2003: 5 publications 2004: 0 publications 2005: 2 publications 2006: 3 publications 2007: 3 publications 2008: 7 publications 2009: 8 publications 2010: 12 publications 2011: 10 publications 2012: 7 publications 2013: 9 publications 2014: 10 publications 2015: 16 publications 2016: 22 publications 2017: 22 publications 2018: 20 publications 2019: 19 publications 2020: 15 publications 2021: 15 publications 2022: 7 publications 2023: 9 publications 2024: 14 publications 2025: 15 publications 2026: 1 publication
1994 2026

268 publications in total across all disciplines

View publications per year as a table
Ichiro Tayasu: publications per year, 1994 to 2026
Year Publications
1994 1
1995 1
1996 1
1997 2
1998 4
1999 0
2000 3
2001 2
2002 3
2003 5
2004 0
2005 2
2006 3
2007 3
2008 7
2009 8
2010 12
2011 10
2012 7
2013 9
2014 10
2015 16
2016 22
2017 22
2018 20
2019 19
2020 15
2021 15
2022 7
2023 9
2024 14
2025 15
2026 1
Total 268
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Ichiro Tayasu publication distribution in Ecology and Evolution in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Ecology and Evolution in 2026. The highlighted bar marks where Ichiro Tayasu sits on this spectrum.

No. of scientists
100 200 300
Bar chart with 100 bars. Horizontal axis: publications, 37–41 to 531+. Vertical axis: number of scientists, 0 to 333. Most scientists, 333, have 97–101 publications. The last bar groups every scientist with 531 publications or more. The highlighted bar, 252–256 publications, is where this scientist sits. 37–41 publications: 2 scientists 42–46 publications: 9 scientists 47–51 publications: 10 scientists 52–56 publications: 31 scientists 57–61 publications: 56 scientists 62–66 publications: 91 scientists 67–71 publications: 92 scientists 72–76 publications: 127 scientists 77–81 publications: 173 scientists 82–86 publications: 236 scientists 87–91 publications: 227 scientists 92–96 publications: 240 scientists 97–101 publications: 333 scientists 102–106 publications: 280 scientists 107–111 publications: 300 scientists 112–116 publications: 285 scientists 117–121 publications: 305 scientists 122–126 publications: 287 scientists 127–131 publications: 278 scientists 132–136 publications: 289 scientists 137–141 publications: 273 scientists 142–146 publications: 262 scientists 147–151 publications: 246 scientists 152–156 publications: 235 scientists 157–161 publications: 205 scientists 162–166 publications: 199 scientists 167–171 publications: 174 scientists 172–176 publications: 164 scientists 177–181 publications: 173 scientists 182–186 publications: 189 scientists 187–191 publications: 170 scientists 192–196 publications: 139 scientists 197–201 publications: 128 scientists 202–206 publications: 117 scientists 207–211 publications: 115 scientists 212–216 publications: 107 scientists 217–221 publications: 124 scientists 222–226 publications: 81 scientists 227–231 publications: 82 scientists 232–236 publications: 85 scientists 237–241 publications: 75 scientists 242–246 publications: 66 scientists 247–251 publications: 81 scientists 252–256 publications: 69 scientists 257–261 publications: 70 scientists 262–266 publications: 55 scientists 267–271 publications: 64 scientists 272–276 publications: 49 scientists 277–281 publications: 48 scientists 282–286 publications: 44 scientists 287–291 publications: 45 scientists 292–296 publications: 36 scientists 297–301 publications: 39 scientists 302–306 publications: 38 scientists 307–311 publications: 30 scientists 312–316 publications: 34 scientists 317–321 publications: 25 scientists 322–326 publications: 22 scientists 327–331 publications: 28 scientists 332–336 publications: 30 scientists 337–341 publications: 22 scientists 342–346 publications: 30 scientists 347–351 publications: 26 scientists 352–356 publications: 22 scientists 357–361 publications: 29 scientists 362–366 publications: 21 scientists 367–371 publications: 12 scientists 372–376 publications: 18 scientists 377–381 publications: 17 scientists 382–386 publications: 13 scientists 387–391 publications: 21 scientists 392–396 publications: 13 scientists 397–401 publications: 10 scientists 402–406 publications: 15 scientists 407–411 publications: 8 scientists 412–416 publications: 9 scientists 417–421 publications: 8 scientists 422–426 publications: 4 scientists 427–431 publications: 10 scientists 432–436 publications: 10 scientists 437–441 publications: 5 scientists 442–446 publications: 4 scientists 447–451 publications: 10 scientists 452–456 publications: 2 scientists 457–461 publications: 4 scientists 462–466 publications: 7 scientists 467–471 publications: 7 scientists 472–476 publications: 6 scientists 477–481 publications: 6 scientists 482–486 publications: 3 scientists 487–491 publications: 3 scientists 492–496 publications: 4 scientists 497–501 publications: 4 scientists 502–506 publications: 8 scientists 507–511 publications: 5 scientists 512–516 publications: 4 scientists 517–521 publications: 5 scientists 522–526 publications: 4 scientists 527–530 publications: 5 scientists 531+ publications: 100 scientists
37–41 publications 531+

This scientist: 252 publications — 85th percentile

85% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 531 publications or more.

View publications distribution as a table
Number of Ecology and Evolution scientists by publication count, Research.com 2026 ranking edition. Based on 8,381 ranked scientists.
Publications Scientists This scientist
37–41 2
42–46 9
47–51 10
52–56 31
57–61 56
62–66 91
67–71 92
72–76 127
77–81 173
82–86 236
87–91 227
92–96 240
97–101 333
102–106 280
107–111 300
112–116 285
117–121 305
122–126 287
127–131 278
132–136 289
137–141 273
142–146 262
147–151 246
152–156 235
157–161 205
162–166 199
167–171 174
172–176 164
177–181 173
182–186 189
187–191 170
192–196 139
197–201 128
202–206 117
207–211 115
212–216 107
217–221 124
222–226 81
227–231 82
232–236 85
237–241 75
242–246 66
247–251 81
252–256 69 252
257–261 70
262–266 55
267–271 64
272–276 49
277–281 48
282–286 44
287–291 45
292–296 36
297–301 39
302–306 38
307–311 30
312–316 34
317–321 25
322–326 22
327–331 28
332–336 30
337–341 22
342–346 30
347–351 26
352–356 22
357–361 29
362–366 21
367–371 12
372–376 18
377–381 17
382–386 13
387–391 21
392–396 13
397–401 10
402–406 15
407–411 8
412–416 9
417–421 8
422–426 4
427–431 10
432–436 10
437–441 5
442–446 4
447–451 10
452–456 2
457–461 4
462–466 7
467–471 7
472–476 6
477–481 6
482–486 3
487–491 3
492–496 4
497–501 4
502–506 8
507–511 5
512–516 4
517–521 5
522–526 4
527–530 5
531+ 100
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Ichiro Tayasu D-index placement in Ecology and Evolution in 2026

The chart shows the D-index (discipline H-index) distribution of Ecology and Evolution scientists ranked by Research.com in 2026. The highlighted bar marks where Ichiro Tayasu sits on this spectrum.

No. of scientists
50 100 150 200 250
Bar chart with 92 bars. Horizontal axis: D-Index, 30 to 121+. Vertical axis: number of scientists, 0 to 280. Most scientists, 280, have 40 D-Index. The last bar groups every scientist with 121 D-Index or more. The highlighted bar, 39 D-Index, is where this scientist sits. 30 D-Index: 95 scientists 31 D-Index: 123 scientists 32 D-Index: 191 scientists 33 D-Index: 245 scientists 34 D-Index: 252 scientists 35 D-Index: 244 scientists 36 D-Index: 249 scientists 37 D-Index: 244 scientists 38 D-Index: 254 scientists 39 D-Index: 254 scientists 40 D-Index: 280 scientists 41 D-Index: 274 scientists 42 D-Index: 266 scientists 43 D-Index: 233 scientists 44 D-Index: 248 scientists 45 D-Index: 208 scientists 46 D-Index: 201 scientists 47 D-Index: 213 scientists 48 D-Index: 207 scientists 49 D-Index: 172 scientists 50 D-Index: 209 scientists 51 D-Index: 199 scientists 52 D-Index: 153 scientists 53 D-Index: 169 scientists 54 D-Index: 163 scientists 55 D-Index: 148 scientists 56 D-Index: 120 scientists 57 D-Index: 146 scientists 58 D-Index: 137 scientists 59 D-Index: 140 scientists 60 D-Index: 104 scientists 61 D-Index: 119 scientists 62 D-Index: 118 scientists 63 D-Index: 99 scientists 64 D-Index: 77 scientists 65 D-Index: 100 scientists 66 D-Index: 86 scientists 67 D-Index: 83 scientists 68 D-Index: 75 scientists 69 D-Index: 94 scientists 70 D-Index: 57 scientists 71 D-Index: 68 scientists 72 D-Index: 59 scientists 73 D-Index: 63 scientists 74 D-Index: 66 scientists 75 D-Index: 60 scientists 76 D-Index: 42 scientists 77 D-Index: 49 scientists 78 D-Index: 39 scientists 79 D-Index: 37 scientists 80 D-Index: 43 scientists 81 D-Index: 41 scientists 82 D-Index: 45 scientists 83 D-Index: 34 scientists 84 D-Index: 40 scientists 85 D-Index: 35 scientists 86 D-Index: 55 scientists 87 D-Index: 24 scientists 88 D-Index: 24 scientists 89 D-Index: 30 scientists 90 D-Index: 23 scientists 91 D-Index: 25 scientists 92 D-Index: 27 scientists 93 D-Index: 27 scientists 94 D-Index: 13 scientists 95 D-Index: 23 scientists 96 D-Index: 12 scientists 97 D-Index: 14 scientists 98 D-Index: 19 scientists 99 D-Index: 16 scientists 100 D-Index: 14 scientists 101 D-Index: 5 scientists 102 D-Index: 21 scientists 103 D-Index: 16 scientists 104 D-Index: 10 scientists 105 D-Index: 7 scientists 106 D-Index: 7 scientists 107 D-Index: 7 scientists 108 D-Index: 6 scientists 109 D-Index: 9 scientists 110 D-Index: 11 scientists 111 D-Index: 12 scientists 112 D-Index: 9 scientists 113 D-Index: 7 scientists 114 D-Index: 3 scientists 115 D-Index: 8 scientists 116 D-Index: 5 scientists 117 D-Index: 11 scientists 118 D-Index: 4 scientists 119 D-Index: 2 scientists 120 D-Index: 5 scientists 121+ D-Index: 100 scientists
30 D-Index 121+

This scientist: 39 D-Index — 26th percentile

26% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 121 D-Index or more.

View D-Index distribution as a table
Number of Ecology and Evolution scientists by D-index, Research.com 2026 ranking edition. Based on 8,381 ranked scientists.
D-Index Scientists This scientist
30 95
31 123
32 191
33 245
34 252
35 244
36 249
37 244
38 254
39 254 39
40 280
41 274
42 266
43 233
44 248
45 208
46 201
47 213
48 207
49 172
50 209
51 199
52 153
53 169
54 163
55 148
56 120
57 146
58 137
59 140
60 104
61 119
62 118
63 99
64 77
65 100
66 86
67 83
68 75
69 94
70 57
71 68
72 59
73 63
74 66
75 60
76 42
77 49
78 39
79 37
80 43
81 41
82 45
83 34
84 40
85 35
86 55
87 24
88 24
89 30
90 23
91 25
92 27
93 27
94 13
95 23
96 12
97 14
98 19
99 16
100 14
101 5
102 21
103 16
104 10
105 7
106 7
107 7
108 6
109 9
110 11
111 12
112 9
113 7
114 3
115 8
116 5
117 11
118 4
119 2
120 5
121+ 100
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Overview

Ichiro Tayasu is affiliated with Kyoto University in Japan, focusing their research primarily within the fields of Environmental Science and Earth and Planetary Sciences. Their scholarly contributions explore diverse subfields including Ecology, Ecology, Evolution, Behavior and Systematics, Nature and Landscape Conservation, Atmospheric Science, and Global and Planetary Change.

The main topics covered in Tayasu's research encompass Isotope Analysis in Ecology, Plant and Animal Studies, Geology and Paleoclimatology Research, Fish Ecology and Management Studies, Groundwater and Isotope Geochemistry, Ecology and Vegetation Dynamics Studies, and Marine Animal Studies Overview.

They have published multiple papers in a range of scientific journals. Notable recent publications include:

  • Trust me? Consumer trust in expert information on food product labels (2020) in Food and Chemical Toxicology
  • Some mycoheterotrophic orchids depend on carbon from dead wood: novel evidence from a radiocarbon approach (2020) in New Phytologist
  • Tracking long-distance migration of marine fishes using compound-specific stable isotope analysis of amino acids (2020) in Ecology Letters
  • Novel mycorrhizal cheating in a green orchid: Cremastra appendiculata depends on carbon from deadwood through fungal associations (2021) in New Phytologist
  • Specialized mycorrhizal association between a partially mycoheterotrophic orchid Oreorchis indica and a Tomentella taxon (2020) in Mycorrhiza

Tayasu frequently collaborates with several researchers in their field. Key coauthors include Chikage Yoshimizu, Kenji Suetsugu, Jun Matsubayashi, Takashi Haraguchi, and Takuya Ishida.

Their work appears regularly in certain journals, particularly:

  • New Phytologist
  • bioRxiv (Cold Spring Harbor Laboratory)
  • Ecosphere
  • Rapid Communications in Mass Spectrometry
  • Mycorrhiza

The research of Ichiro Tayasu revolves around using isotope analysis methods in ecological and environmental studies. Their studies address plant-fungal interactions in orchids, migratory behavior in marine fishes, and broader ecological and environmental dynamics. The investigations include insights into carbon transfer in mycoheterotrophic orchids and the application of stable isotopes to track ecological processes.

Best Publications

  • Advances in the application of amino acid nitrogen isotopic analysis in ecological and biogeochemical studies

    Naohiko Ohkouchi;Yoshito Chikaraishi;Yoshito Chikaraishi;Hilary G. Close;Brian Fry

  • Feeding groups, lifetypes and the global ecology of termites

    Paul Eggleton;Ichiro Tayasu

  • Sources of nitrate and ammonium contamination in groundwater under developing Asian megacities

    Yu Umezawa;Takahiro Hosono;Shin ichi Onodera;Fernando Siringan

  • New organic reference materials for carbon- and nitrogen-stable isotope ratio measurements provided by Center for Ecological Research, Kyoto University, and Institute of Biogeosciences, Japan Agency for Marine-Earth Science and Technology

    Ichiro Tayasu;Riyo Hirasawa;Nanako O. Ogawa;Naohiko Ohkouchi

  • Nitrogen and carbon isotope ratios in termites: an indicator of trophic habit along the gradient from wood-feeding to soil-feeding

    I. Tayasu;T. Abe;P. Eggleton;D. E. Bignell

  • Differential role of symbiotic fungi in lignin degradation and food provision for fungus-growing termites (Macrotermitinae: Isoptera)

    F. Hyodo;I. Tayasu;T. Inoue;J.‐I. Azuma

  • Role of the mutualistic fungus in lignin degradation in the fungus-growing termite Macrotermes gilvus (Isoptera; Macrotermitinae).

    F Hyodo;T Inoue;J.-I Azuma;I Tayasu

  • Xylophagous termites depending on atmospheric nitrogen

    I. Täyasu;A. Sugimoto;E. Wada;T. Abe

  • Multiple isotope (H, O, N, S and Sr) approach elucidates complex pollution causes in the shallow groundwaters of the Taipei urban area

    Takahiro Hosono;Chung Ho Wang;Yu Umezawa;Takanori Nakano

  • Impact of fertilizer on a small watershed of Lake Biwa: use of sulfur and strontium isotopes in environmental diagnosis.

    Takahiro Hosono;Takanori Nakano;Akitake Igeta;Ichiro Tayasu

  • Are stored carbohydrates necessary for seed production in temperate deciduous trees

    Tomoaki Ichie;Shuichi Igarashi;Shohei Yoshida;Tanaka Kenzo

  • Methane and hydrogen production in a termite-symbiont system

    Atsuko Sugimoto;Tetsushi Inoue;Ichiro Tayasu;Leigh Miller

  • Soil-Feeding Termites: Biology, Microbial Associations and Digestive Mechanisms

    Alain Brauman;David E. Bignell;Ichiro Tayasu

  • Effect of agriculture on water quality of Lake Biwa tributaries, Japan

    Takanori Nakano;Ichiro Tayasu;Yoshihiro Yamada;Takahiro Hosono

  • Use of carbon and nitrogen isotope ratios in termite research

    Ichiro Tayasu

  • Spatial distribution of nitrate sources of rivers in the Lake Biwa watershed, Japan: Controlling factors revealed by nitrogen and oxygen isotope values

    Nobuhito Ohte;Nobuhito Ohte;Ichiro Tayasu;Ayato Kohzu;Ayato Kohzu;Chikage Yoshimizu

  • Mountain-climbing bears protect cherry species from global warming through vertical seed dispersal.

    Shoji Naoe;Ichiro Tayasu;Yoichiro Sakai;Takashi Masaki

  • Erratum to “Sources of nitrate and ammonium contamination in groundwater under developing Asian megacities”

    Yu Umezawa;Takahiro Hosono;Shin ichi Onodera;Fernando Siringan

  • Collagen turnover and isotopic records in cortical bone

    Jun Matsubayashi;Ichiro Tayasu

  • Gradual enrichment of 15N with humification of diets in a below-ground food web: relationship between 15N and diet age determined using 14C

    F. Hyodo;I. Tayasu;S. Konate;J. E. Tondoh

  • Confirmation of soil‐feeding termites (Isoptera; Termitidae; Termitinae) in Australia using stable isotope ratios

    I. Tayasu;T. Inoue;L. R. Miller;A. Sugimoto

  • Carbon autonomy of reproductive shoots of Siberian alder (Alnus hirsuta var. sibirica)

    Shigeaki Hasegawa;Shigeaki Hasegawa;Keisuke Koba;Ichiro Tayasu;Hiroshi Takeda

  • Major decline in marine and terrestrial animal consumption by brown bears (Ursus arctos).

    Jun Matsubayashi;Jun Matsubayashi;Junko O. Morimoto;Ichiro Tayasu;Tsutomu Mano

Frequent Co-Authors

Toshi Nagata
Toshi Nagata University of Tokyo
Nobuhito Ohte
Nobuhito Ohte Kyoto University
Makoto Taniguchi
Makoto Taniguchi Research Institute for Humanity and Nature
Naohiko Ohkouchi
Naohiko Ohkouchi Japan Agency for Marine-Earth Science and Technology
Keisuke Koba
Keisuke Koba Kyoto University
Takahiro Hosono
Takahiro Hosono Kumamoto University
Yasuyuki Shibata
Yasuyuki Shibata Tokyo University of Marine Science and Technology
Masao Uchida
Masao Uchida National Institute for Environmental Studies
Yoshito Chikaraishi
Yoshito Chikaraishi Japan Agency for Marine-Earth Science and Technology
Nanako O. Ogawa
Nanako O. Ogawa Japan Agency for Marine-Earth Science and Technology

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