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
1787
National Ranking
651

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

If you think any of the details on this page are incorrect, let us know.

Report an issue

We appreciate your kind effort to assist us to improve this page, it would be helpful providing us with as much detail as possible in the text box below:

Related Online Degrees & Career Pathways

If you’re interested in Ecology and Evolution, there are several related online degrees and potential career paths you might want to consider. Many students begin their journey with a background in biological sciences, then specialize in areas such as psychology or counseling. These additional fields offer both versatile skills and new professional opportunities.

For those curious about human behavior and its biological roots, a how much does a forensic psychologist make guide can offer insight into salary expectations and career prospects. Similarly, combining an ecological perspective with child development may lead you to explore online options—such as an online masters child psychology degree.

Interested in providing support and guidance to others? There are affordable masters in counseling programs that can deepen your understanding of human and environmental interactions. You can also pursue advanced research or clinical practice through online masters in clinical psychology to build a flexible and impactful career.

Best Scientists Citing Alexander S. Flecker

Trending Scientists

Recently Published Articles