World's Best Scientists 2026 revealed!
Alexander S. Flecker

Alexander S. Flecker

D-Index & Metrics

Ecology and Evolution

D-Index
65
Citations
16061
World Ranking
1783
National Ranking
651

Alexander S. Flecker 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 Alexander S. Flecker sits on this spectrum.

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 publications 531+

This scientist: 162 publications — 59th percentile

59% of scientists in this discipline score the same or lower.

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

Alexander S. Flecker 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 Alexander S. Flecker sits on this spectrum.

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: 65 D-Index — 79th percentile

79% of scientists in this discipline score the same or lower.

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

Overview

Alexander S. Flecker is a researcher affiliated with Cornell University in the United States, specializing in environmental science with an extensive focus on areas related to ecology and water science. Their work spans several interconnected subfields, including nature and landscape conservation, ecology, water science and technology, global and planetary change, and aquatic science.

Their research prominently covers main topics such as fish ecology and management studies, fish biology, ecology, and behavior, water-energy-food nexus studies, isotope analysis in ecology, hydrology and watershed management studies, aquaculture nutrition and growth, and water resources management and optimization.

Alexander S. Flecker has contributed to numerous scientific publications, with frequent appearances in journals like Ecology, Science, Science Advances, Frontiers in Environmental Science, and Global Change Biology.

Among their recent papers are:

  • Reducing adverse impacts of Amazon hydropower expansion, 2022, Science
  • Floating solar power could help fight climate change - let's get it right, 2022, Nature
  • The Evolutionary Consequences of Dams and Other Barriers for Riverine Fishes, 2022, BioScience
  • Impacts of detritivore diversity loss on instream decomposition are greatest in the tropics, 2021, Nature Communications
  • Hydropeaking Operations of Two Run-of-River Mega-Dams Alter Downstream Hydrology of the Largest Amazon Tributary, 2020, Frontiers in Environmental Science

Flecker frequently collaborates with several coauthors including Sebastián Heilpern, Rafael M. Almeida, Peter B. McIntyre, Suresh A. Sethi, and Carla P. Gomes, with whom they have published multiple papers.

Their consistent engagement with topics such as fish ecology and water resource management highlights a research trajectory aligned with understanding ecological dynamics and the environmental impacts of human infrastructure on aquatic ecosystems.

Best Publications

  • Biodiversity conservation in running waters

    J.D. Allan;A.S. Flecker

  • An ecosystem engineer, the beaver, increases species richness at the landscape scale

    Justin P. Wright;Clive G. Jones;Alexander S. Flecker

  • Ecosystem engineering by a dominant detritivore in a diverse tropical stream

    Alexander S. Flecker

  • Local adaptation in Trinidadian guppies alters ecosystem processes

    Ronald D. Bassar;Michael C. Marshall;Andrés López-Sepulcre;Eugenia Zandonà

  • Stoichiometry of nutrient recycling by vertebrates in a tropical stream: linking species identity and ecosystem processes

    Michael J. Vanni;Alexander S. Flecker;James M. Hood;Jenifer L. Headworth

  • A global experiment suggests climate warming will not accelerate litter decomposition in streams but might reduce carbon sequestration

    Luz Boyero;Richard G. Pearson;Mark O. Gessner;Mark O. Gessner;Leon A. Barmuta

  • Fish Predation and The Evolution of Invertebrate Drift Periodicity: Evidence from Neotropical Streams

    Alexander S. Flecker

  • Loss of a Harvested Fish Species Disrupts Carbon Flow in a Diverse Tropical River

    Brad W. Taylor;Alexander S. Flecker;Robert O. Hall

  • Fish Distributions and Nutrient Cycling in Streams: Can Fish Create Biogeochemical Hotspots?

    Peter B. McIntyre;Peter B. McIntyre;Alexander S. Flecker;Michael J. Vanni;James M. Hood

  • Fish extinctions alter nutrient recycling in tropical freshwaters

    Peter B. McIntyre;Laura E. Jones;Alexander S. Flecker;Michael J. Vanni

  • Community‐Wide Consequences of Trout Introduction in New Zealand Streams

    Alexander S. Flecker;Colin R. Townsend

  • Patch dynamics and environmental heterogeneity in lotic ecosystems

    Kirk O. Winemiller;Alexander S. Flecker;David J. Hoeinghaus

  • Disturbance and the temporal variability of invertebrate assemblages in two Andean streams

    Alexander S. Flecker;Brian Feifarek

  • Highly unsaturated fatty acids in nature: what we know and what we need to learn

    Cornelia Wingfield Twining;J. Thomas Brenna;Nelson G. Hairston Jr.;Alexander S. Flecker

  • Improving the fluorometric ammonium method: matrix effects, background fluorescence, and standard additions

    Brad W. Taylor;Christine F. Keep;Robert O. Hall;Benjamin J. Koch

  • Narrow thermal tolerance and low dispersal drive higher speciation in tropical mountains.

    Nicholas R. Polato;Brian A. Gill;Alisha A. Shah;Miranda M. Gray

  • Ecosystem Function and Services of Aquatic Predators in the Anthropocene.

    Neil Hammerschlag;Oswald J. Schmitz;Alexander S. Flecker;Kevin D. Lafferty

  • Fish Trophic Guilds and the Stucture of a Tropical Stream: Weak Direct vs. Strong Indirect Effects

    Alexander S. Flecker

  • The importance of predation, substrate and spatial refugia in determining lotic insect distributions.

    Alexander S. Flecker;J. David Allan

  • Reducing greenhouse gas emissions of Amazon hydropower with strategic dam planning.

    Rafael M. Almeida;Qinru Shi;Jonathan M. Gomes-Selman;Xiaojian Wu;Xiaojian Wu

  • Migratory Fishes as Material and Process Subsidies in Riverine Ecosystems

    Alexander S. Flecker;Peter B. McIntyre;Jonathan W. Moore

  • Riparian plant litter quality increases with latitude

    Luz Boyero;Manuel A. S. Graca;Alan M. Tonin;Javier Perez

Frequent Co-Authors

Steven A. Thomas
Steven A. Thomas University of Nebraska–Lincoln
Andrea C. Encalada
Andrea C. Encalada Universidad San Francisco de Quito
N. LeRoy Poff
N. LeRoy Poff Colorado State University
Peter B. McIntyre
Peter B. McIntyre Cornell University
David N. Reznick
David N. Reznick University of California, Riverside
Catherine M. Pringle
Catherine M. Pringle University of Georgia
Kelly R. Zamudio
Kelly R. Zamudio Cornell University
J. Thomas Brenna
J. Thomas Brenna The University of Texas at Austin
Mark O. Gessner
Mark O. Gessner Technical University of Berlin
Cameron K. Ghalambor
Cameron K. Ghalambor Norwegian University of Science and Technology

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Related Online Degrees & Career Pathways

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