World's Best Scientists 2026 revealed!

D-Index & Metrics

Discipline name D-Index World Ranking Current World Ranking National Ranking Current National Ranking Publications Citations
Ecology and Evolution 47 4359 4205 483 464 385 11367

Alan Warren publications per year

The chart shows the history of publications by Alan Warren between 1983 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. Alan Warren published across 44 years, from 1983 to 2026, averaging 9.3 papers a year. Output peaked at 37 publications in 2021. 4 of the 407 publications appeared in the last two years.

No. of publications
10 20 30
Bar chart. Horizontal axis: year, 1983 to 2026. Vertical axis: number of publications, 0 to 37. Peak 37 publications in 2021. 1983: 1 publication 1984: 0 publications 1985: 1 publication 1986: 0 publications 1987: 1 publication 1988: 0 publications 1989: 0 publications 1990: 1 publication 1991: 0 publications 1992: 0 publications 1993: 4 publications 1994: 1 publication 1995: 2 publications 1996: 5 publications 1997: 5 publications 1998: 2 publications 1999: 8 publications 2000: 7 publications 2001: 5 publications 2002: 9 publications 2003: 7 publications 2004: 7 publications 2005: 9 publications 2006: 10 publications 2007: 12 publications 2008: 17 publications 2009: 11 publications 2010: 11 publications 2011: 19 publications 2012: 10 publications 2013: 21 publications 2014: 13 publications 2015: 21 publications 2016: 16 publications 2017: 23 publications 2018: 20 publications 2019: 18 publications 2020: 27 publications 2021: 37 publications 2022: 25 publications 2023: 11 publications 2024: 6 publications 2025: 3 publications 2026: 1 publication
1983 2026

407 publications in total across all disciplines

View publications per year as a table
Alan Warren: publications per year, 1983 to 2026
Year Publications
1983 1
1984 0
1985 1
1986 0
1987 1
1988 0
1989 0
1990 1
1991 0
1992 0
1993 4
1994 1
1995 2
1996 5
1997 5
1998 2
1999 8
2000 7
2001 5
2002 9
2003 7
2004 7
2005 9
2006 10
2007 12
2008 17
2009 11
2010 11
2011 19
2012 10
2013 21
2014 13
2015 21
2016 16
2017 23
2018 20
2019 18
2020 27
2021 37
2022 25
2023 11
2024 6
2025 3
2026 1
Total 407
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Alan Warren publications per year - data summary

  • Alan Warren, a Ecology and Evolution scholar from Natural History Museum, has 407 publications recorded across 44 years, from 1983 to 2026.
  • The oldest publication on record dates to 1983 and the most recent to 2026.
  • The most productive year is 2021, with 37 publications.
  • The least productive years with any output are 1983, 1985, 1987, 1990 and others, with 1 publication each.
  • 6 of the 44 years in the span carry no publications at all (1984, 1986, 1988, 1989 and others).
  • The rate of publication averages 9.3 papers per year over the whole span, or 10.7 per year counting only the 38 years with at least one publication.
  • The last 5 years on the chart (2022-2026) hold 46 publications, 11% of the career total.
  • Split into equal eras - 1983-1997: 21 publications (1.4 per year); 1998-2012: 144 publications (9.6 per year); 2013-2026: 242 publications (17.3 per year).
  • Comparing the opening and closing eras, the overall trend of publication is rising.

Alan Warren 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 Alan Warren 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, 382–386 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: 385 publications — 96th percentile

96% 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
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 13 385
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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Alan Warren publication distribution in Ecology and Evolution in 2026 - data summary

  • The chart plots the publication count of all 8,381 Ecology and Evolution scientists ranked by Research.com in 2026, grouped into 100 ranges running from 37–41 to 531+ publications.
  • Alan Warren, a Ecology and Evolution scholar from Natural History Museum, records 385 publications - the 96th percentile of the discipline.
  • 96% of ranked Ecology and Evolution scientists score the same or lower than Alan Warren, and about 4% score higher.
  • The median of the discipline falls in the 147–151 publications range, and Alan Warren ranks above the median.
  • The most crowded range is 97–101 publications, holding 333 scientists (4% of the field).
  • 58% of the field sits in the lowest quarter of the value range (up to 157–161 publications), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 531 publications or more, 100 scientists in all (1% of the field).

Alan Warren 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 Alan Warren 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, 47 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: 47 D-Index — 49th percentile

49% 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
40 280
41 274
42 266
43 233
44 248
45 208
46 201
47 213 47
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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Alan Warren D-index placement in Ecology and Evolution in 2026 - data summary

  • The chart plots the discipline H-index (D-index) of all 8,381 Ecology and Evolution scientists ranked by Research.com in 2026, grouped into 92 ranges running from 30 to 121+ D-Index.
  • Alan Warren, a Ecology and Evolution scholar from Natural History Museum, records 47 D-Index - the 49th percentile of the discipline.
  • 49% of ranked Ecology and Evolution scientists score the same or lower than Alan Warren, and about 51% score higher.
  • The median of the discipline falls in the 48 D-Index range, and Alan Warren ranks below the median.
  • The most crowded range is 40 D-Index, holding 280 scientists (3% of the field).
  • 60% of the field sits in the lowest quarter of the value range (up to 52 D-Index), so the distribution is heavily right-skewed and high scores are rare.
  • The final bar has no upper bound: it groups every scientist with 121 D-Index or more, 100 scientists in all (1% of the field).

Overview

Alan Warren is affiliated with the Natural History Museum in the United Kingdom. Their research spans multiple fields, focusing predominantly on Environmental Science and Biochemistry, Genetics, and Molecular Biology. Within these, their work extends into several subfields including Ecology, Molecular Biology, Environmental Chemistry, Oceanography, and Pollution.

The scientist's research topics cover a range of areas related to microbial and environmental studies. These include:

  • Microbial Community Ecology and Physiology
  • Protist diversity and phylogeny
  • Methane Hydrates and Related Phenomena
  • Marine and coastal ecosystems
  • Genomics and Phylogenetic Studies
  • Environmental DNA in Biodiversity Studies
  • Marine Biology and Ecology Research

Alan Warren has contributed extensively to publishing, with frequent appearances in several scientific journals. The most common venues for their work include:

  • European Journal of Protistology
  • Frontiers in Microbiology
  • Marine Life Science & Technology
  • Marine Pollution Bulletin
  • Zoological Journal of the Linnean Society

Their recent papers include the following:

  • "Biodiversity of freshwater ciliates (Protista, Ciliophora) in the Lake Weishan Wetland, China: the state of the art" (2022), published in Marine Life Science & Technology
  • "Morphology, taxonomy and molecular phylogeny of three marine peritrich ciliates, including two new species: Zoothamnium apoarbuscula n. sp. and Z. apohentscheli n. sp. (Protozoa, Ciliophora, Peritrichia)" (2020), published in Marine Life Science & Technology
  • "New contributions to the phylogeny of the ciliate class Heterotrichea (Protista, Ciliophora): analyses at family-genus level and new evolutionary hypotheses" (2020), published in Science China Life Sciences
  • "Does the Gonostomum-patterned oral apparatus in hypotrichia carry a phylogenetic signal? Evidence from morphological and molecular data based on extended taxon sampling using three nuclear genes (Ciliophora, Spirotrichea)" (2020), published in Science China Life Sciences
  • "A new hypotrich ciliate, Oxytricha xianica sp. nov., with notes on the morphology and phylogeny of a Chinese population of Oxytricha auripunctata Blatterer & Foissner, 1988 (Ciliophora, Oxytrichidae)" (2021), published in Marine Life Science & Technology

The scientist has collaborated frequently with a number of coauthors over their career. These include:

  • Saleh Alfarraj
  • Weibo Song
  • Borong Lu
  • Xiaozhong Hu
  • Henglong Xu

Best Publications

  • The magnitude of global marine species diversity

    Ward Appeltans;Shane T. Ahyong;Shane T. Ahyong;Gary Anderson;Martin V. Angel

  • The All-Data-Based Evolutionary Hypothesis of Ciliated Protists with a Revised Classification of the Phylum Ciliophora (Eukaryota, Alveolata).

    Feng Gao;Alan Warren;Qianqian Zhang;Jun Gong

  • Investigation of Escherichia coli removal in various designs of subsurface flow wetlands used for wastewater treatment

    O Decamp;A Warren

  • An approach to analyzing spatial patterns of planktonic ciliate communities for monitoring water quality in Jiaozhou Bay, northern China.

    Yong Jiang;Henglong Xu;Xiaozhong Hu;Mingzhuang Zhu

  • Periphytic ciliate colonization: annual cycle and responses to environmental conditions

    Jun Gong;Weibo Song;Alan Warren

  • Effect of bone meal (calcium phosphate) amendments on metal release from contaminated soils--a leaching column study.

    M.E Hodson;E Valsami-Jones;J.D Cotter-Howells;W.E Dubbin

  • Protistan communities in aquifers: a review

    Gianfranco Novarino;Alan Warren;Helen Butler;Gail Lambourne

  • Bacterivory in ciliates isolated from constructed wetlands (reed beds) used for wastewater treatment

    Olivier Decamp;Alan Warren

  • "Candidatus Sonnebornia yantaiensis", a member of candidate division OD1, as intracellular bacteria of the ciliated protist Paramecium bursaria (Ciliophora, Oligohymenophorea).

    Jun Gong;Jun Gong;Yao Qing;Xiaohong Guo;Alan Warren

  • Taxonomic Redescriptions of Two Ciliates, Protogastrostyla pulchra n. g., n. comb. and Hemigastrostyla enigmatica (Ciliophora: Spirotrichea, Stichotrichia), with Phylogenetic Analyses Based on 18S and 28S rRNA Gene Sequences

    Jun Gong;Jun Gong;Jun Gong;Se-Joo Kim;Sun-Young Kim;Gi-Sik Min

  • Beyond the "Code": A Guide to the Description and Documentation of Biodiversity in Ciliated Protists (Alveolata, Ciliophora).

    Alan Warren;David J. Patterson;Micah Dunthorn;John C. Clamp

  • The role of ciliated protozoa in subsurface flow wetlands and their potential as bioindicators

    O. Decamp;A. Warren;R. Sanchez

  • Analysis of the Internal Transcribed Spacer 2 (ITS2) Region of Scuticociliates and Related Taxa (Ciliophora, Oligohymenophorea) to Infer their Evolution and Phylogeny

    Miao Miao;Alan Warren;Weibo Song;Shi Wang

  • Planktonic protist communities in a semi-enclosed mariculture pond : structural variation and correlation with environmental conditions

    Henglong Xu;Weibo Song;Alan Warren;Khaled A. S. Al-Rasheid

  • Protozoan predation as a mechanism for the removal of cryptosporidium oocysts from wastewaters in constructed wetlands.

    R. Stott;Eric May;E. Matsushita;A. Warren

  • Diversity of free-living marine ciliates (Alveolata, Ciliophora): Faunal studies in coastal waters of China during the years 2011–2016

    Weiwei Liu;Jiamei Jiang;Yuan Xu;Xuming Pan

  • Shifts in diversity and community structure of endophytic bacteria and archaea across root, stem and leaf tissues in the common reed, Phragmites australis, along a salinity gradient in a marine tidal wetland of northern China

    Bin Ma;Xiaofei Lv;Alan Warren;Jun Gong

  • An approach to determining the sampling effort for analyzing biofilm-dwelling ciliate colonization using an artificial substratum in coastal waters.

    Henglong Xu;Wei Zhang;Yong Jiang;Mingzhuang Zhu

  • Functional groups of marine ciliated protozoa and their relationships to water quality

    Yong Jiang;Henglong Xu;Xiaozhong Hu;Alan Warren

  • Morphology and SSU rRNA gene-based phylogeny of two marine Euplotes species, E. orientalis spec. nov. and E. raikovi (Ciliophora, Euplotida).

    Jiamei Jiang;Qianqian Zhang;Alan Warren;Khaled A.S. Al-Rasheid

  • Predation of Cryptosporidium oocysts by protozoa and rotifers: implications for water quality and public health.

    R. Stott;Eric May;E. Ramirez;A. Warren

Frequent Co-Authors

Weibo Song
Weibo Song Ocean University of China
Khaled A. S. Al-Rasheid
Khaled A. S. Al-Rasheid King Saud University
Henglong Xu
Henglong Xu Ocean University of China
Zigui Chen
Zigui Chen Chinese University of Hong Kong
Nianzhi Jiao
Nianzhi Jiao Xiamen University
Thorsten Stoeck
Thorsten Stoeck Technical University of Kaiserslautern
Micah Dunthorn
Micah Dunthorn University of Oslo
Ronald W. Harvey
Ronald W. Harvey United States Geological Survey
Bangqin Huang
Bangqin Huang Xiamen University
Mark E. Hodson
Mark E. Hodson University of York

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