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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 43 5300 5119 1813 1739 126 7400

James D. Ackerman publications per year

The chart shows the history of publications by James D. Ackerman between 1977 and 2026, highlighting the no. of papers published in each year and offering an overview of the publication velocity of this scholar. James D. Ackerman published across 50 years, from 1977 to 2026, averaging 3 papers a year. Output peaked at 9 publications in 2021. 9 of the 150 publications appeared in the last two years.

No. of publications
2 4 6 8
Bar chart. Horizontal axis: year, 1977 to 2026. Vertical axis: number of publications, 0 to 9. Peak 9 publications in 2021. 1977: 1 publication 1978: 0 publications 1979: 1 publication 1980: 2 publications 1981: 2 publications 1982: 2 publications 1983: 4 publications 1984: 0 publications 1985: 1 publication 1986: 1 publication 1987: 2 publications 1988: 0 publications 1989: 3 publications 1990: 3 publications 1991: 1 publication 1992: 3 publications 1993: 4 publications 1994: 2 publications 1995: 0 publications 1996: 4 publications 1997: 1 publication 1998: 0 publications 1999: 3 publications 2000: 4 publications 2001: 2 publications 2002: 3 publications 2003: 4 publications 2004: 5 publications 2005: 2 publications 2006: 3 publications 2007: 5 publications 2008: 0 publications 2009: 2 publications 2010: 3 publications 2011: 4 publications 2012: 4 publications 2013: 8 publications 2014: 3 publications 2015: 4 publications 2016: 4 publications 2017: 4 publications 2018: 2 publications 2019: 3 publications 2020: 3 publications 2021: 9 publications 2022: 4 publications 2023: 7 publications 2024: 9 publications 2025: 7 publications 2026: 2 publications
1977 2026

150 publications in total across all disciplines

View publications per year as a table
James D. Ackerman: publications per year, 1977 to 2026
Year Publications
1977 1
1978 0
1979 1
1980 2
1981 2
1982 2
1983 4
1984 0
1985 1
1986 1
1987 2
1988 0
1989 3
1990 3
1991 1
1992 3
1993 4
1994 2
1995 0
1996 4
1997 1
1998 0
1999 3
2000 4
2001 2
2002 3
2003 4
2004 5
2005 2
2006 3
2007 5
2008 0
2009 2
2010 3
2011 4
2012 4
2013 8
2014 3
2015 4
2016 4
2017 4
2018 2
2019 3
2020 3
2021 9
2022 4
2023 7
2024 9
2025 7
2026 2
Total 150
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James D. Ackerman 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 James D. Ackerman 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, 122–126 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: 126 publications — 37th percentile

37% 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
122–126 287 126
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
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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James D. Ackerman 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 James D. Ackerman 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, 43 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: 43 D-Index — 38th percentile

38% 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 43
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

James D. Ackerman is affiliated with the University of Puerto Rico in the United States. Their body of work spans several fields including Agricultural and Biological Sciences, Biochemistry, Genetics and Molecular Biology, and Environmental Science. Within these domains, their research touches upon subfields such as Ecology, Evolution, Behavior and Systematics, Plant Science, Molecular Biology, Nature and Landscape Conservation, and Ecological Modeling.

The scientist's main topics of study include Plant and Animal Studies, Plant Parasitism and Resistance, Ecology and Vegetation Dynamics Studies, Plant and Fungal Species Descriptions, Species Distribution and Climate Change, Plant Diversity and Evolution, and Insect and Pesticide Research.

Among recent publications authored or coauthored by James D. Ackerman are:

  • Beyond the Various Contrivances by Which Orchids Are Pollinated: Global Patterns in Orchid Pollination Biology (2023, Botanical Journal of the Linnean Society)
  • The Origin and Speciation of Orchids (2024, New Phytologist)
  • Island Biogeography of Native and Alien Plant Species: Contrasting Drivers of Diversity Across the Lesser Antilles (2020, Diversity and Distributions)
  • Alien Species Affect the Abundance and Richness of Native Species in Tropical Forests: The Role of Adaptive Strategies (2022, Ecosphere)
  • Trick or Treat? Pollinator Attraction in Vanilla pompona (Orchidaceae) (2021, Biotropica)

Frequent coauthors contributing to the research collaborations with Ackerman include Raymond L. Tremblay, Adam P. Karremans, Diego Bogarín, Oscar A. Pérez-Escobar, and Ryan D. Phillips.

The scientist has published multiple articles in high-profile venues such as Biological Invasions, Zenodo (CERN European Organization for Nuclear Research), Lankesteriana, Diversity and Distributions, and bioRxiv (Cold Spring Harbor Laboratory).

Best Publications

  • Variation in sexual reproduction in orchids and its evolutionary consequences: a spasmodic journey to diversification

    Raymond L. Tremblay;James D. Ackerman;Jess K. Zimmerman;Ricardo N. Calvo

  • Diversity and host specificity of endophytic Rhizoctonia-like fungi from tropical orchids

    J. Tupac Otero;James D. Ackerman;Paul Bayman

  • SHORT- AND LONG-TERM LIMITATIONS TO FRUIT PRODUCTION IN A TROPICAL ORCHID'

    James D. Ackerman;Arlee M. Montalvo

  • Long-term ecology of euglossine orchid-bees (Apidae: Euglossini) in Panama.

    D. W. Roubik;J. D. Ackerman

  • Specificity and mutual dependency of the orchid‐euglossine bee interaction

    J. D. Ackerman

  • Differences in mycorrhizal preferences between two tropical orchids

    J. Tupac Otero;James D. Ackerman;Paul Bayman

  • Limitations to Fruit Production in Ionopsis utricularioides (Orchidaceae)

    Arlee M. Montalvo;James D. Ackerman

  • DIVERSITY AND SEASONALITY OF MALE EUGLOSSINE BEES (HYMENOPTERA: APIDAE) IN CENTRAL PANAMA'

    James D. Ackerman

  • Seedling establishment in an epiphytic orchid: an experimental study of seed limitation.

    J. D. Ackerman;A. Sabat;J. K. Zimmerman

  • Limitations to Sexual Reproduction in Encyclia krugii (Orchidaceae)

    James D. Ackerman

  • Food-Foraging Behavior of Male Euglossini (Hymenoptera: Apidae): Vagabonds or Trapliners?

    James D. Ackerman;Michael R. Mesler;Karen L. Lu;Arlee M. Montalvo

  • Widespread mycorrhizal specificity correlates to mycorrhizal function in the neotropical, epiphytic orchid Ionopsis utricularioides (Orchidaceae).

    J. Tupac Otero;Nicola S. Flanagan;E. Allen Herre;James D. Ackerman

  • orchid flora of Puerto Rico and the Virgin Islands

    James D. Ackerman

  • Orchid-phorophyte relationships in a forest watershed in Puerto Rico

    Luis E. Migenis;James D. Ackerman

  • Gene flow and effective population size in Lepanthes (Orchidaceae): a case for genetic drift

    Raymond L. Tremblay;James D. Ackerman

  • Geographic and seasonal variation in fragrance choices and preferences of male euglossine bees.

    James D. Ackerman

  • EFFECTS OF DISPLAY SIZE, FLOWERING PHENOLOGY, AND NECTAR AVAILABILITY ON EFFECTIVE VISITATION FREQUENCY IN COMPARETTIA FALCATA (ORCHIDACEAE)

    Javier A. Rodríguez-Robles;Elvia J. Meléndez;James D. Ackerman

  • Variation in mycorrhizal performance in the epiphytic orchid Tolumnia variegata in vitro : the potential for natural selection

    J. Tupac Otero;J. Tupac Otero;Paul Bayman;James D. Ackerman

  • Biogeography of the Antilles based on a parsimony analysis of orchid distributions

    J. Carlos Trejo-Torres;James D. Ackerman

  • Variation in the floral fragrance of Epidendrum ciliare (Orchidaceae)

    Samuel Moya;James D. Ackerman

Frequent Co-Authors

Jess K. Zimmerman
Jess K. Zimmerman University of Puerto Rico
David W. Roubik
David W. Roubik Smithsonian Tropical Research Institute
Lawrence R. Walker
Lawrence R. Walker University of Nevada, Las Vegas
W. Mark Whitten
W. Mark Whitten Florida Museum of Natural History
Salvatore Cozzolino
Salvatore Cozzolino University of Naples Federico II
Bart Muys
Bart Muys KU Leuven
Norris H. Williams
Norris H. Williams University of Florida
Curtis C. Daehler
Curtis C. Daehler University of Hawaii at Manoa
Pavel Kindlmann
Pavel Kindlmann Charles University
Frederick N. Scatena
Frederick N. Scatena University of Pennsylvania

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