World's Best Scientists 2026 revealed!
VIEW LIST
Karel Šimek

D-Index & Metrics

Biology and Biochemistry

D-Index
62
Citations
10110
World Ranking
11056
National Ranking
13

Karel Šimek publication distribution in Biology and Biochemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Biology and Biochemistry in 2026. The highlighted bar marks where Karel Šimek sits on this spectrum.

47–56 publications: 8 scientists 57–66 publications: 35 scientists 67–76 publications: 106 scientists 77–86 publications: 231 scientists 87–96 publications: 414 scientists 97–106 publications: 546 scientists 107–116 publications: 704 scientists 117–126 publications: 849 scientists 127–136 publications: 980 scientists 137–146 publications: 942 scientists 147–156 publications: 969 scientists 157–166 publications: 950 scientists 167–176 publications: 951 scientists 177–186 publications: 915 scientists 187–196 publications: 787 scientists 197–206 publications: 841 scientists 207–216 publications: 735 scientists 217–226 publications: 709 scientists 227–236 publications: 651 scientists 237–246 publications: 605 scientists 247–256 publications: 510 scientists 257–266 publications: 524 scientists 267–276 publications: 434 scientists 277–286 publications: 418 scientists 287–296 publications: 350 scientists 297–306 publications: 363 scientists 307–316 publications: 315 scientists 317–326 publications: 296 scientists 327–336 publications: 261 scientists 337–346 publications: 240 scientists 347–356 publications: 219 scientists 357–366 publications: 197 scientists 367–376 publications: 154 scientists 377–386 publications: 161 scientists 387–396 publications: 155 scientists 397–406 publications: 145 scientists 407–416 publications: 124 scientists 417–426 publications: 112 scientists 427–436 publications: 132 scientists 437–446 publications: 116 scientists 447–456 publications: 99 scientists 457–466 publications: 81 scientists 467–476 publications: 91 scientists 477–486 publications: 80 scientists 487–496 publications: 80 scientists 497–506 publications: 60 scientists 507–516 publications: 36 scientists 517–526 publications: 46 scientists 527–536 publications: 54 scientists 537–546 publications: 44 scientists 547–556 publications: 43 scientists 557–566 publications: 43 scientists 567–576 publications: 42 scientists 577–586 publications: 25 scientists 587–596 publications: 34 scientists 597–606 publications: 23 scientists 607–616 publications: 33 scientists 617–626 publications: 31 scientists 627–636 publications: 27 scientists 637–646 publications: 25 scientists 647–656 publications: 28 scientists 657–666 publications: 34 scientists 667–676 publications: 18 scientists 677–686 publications: 16 scientists 687–696 publications: 10 scientists 697–706 publications: 12 scientists 707–716 publications: 21 scientists 717–726 publications: 12 scientists 727–736 publications: 12 scientists 737–746 publications: 10 scientists 747–756 publications: 7 scientists 757–766 publications: 13 scientists 767–776 publications: 15 scientists 777–786 publications: 13 scientists 787–796 publications: 9 scientists 797–806 publications: 9 scientists 807–816 publications: 7 scientists 817–826 publications: 4 scientists 827–836 publications: 9 scientists 837–846 publications: 7 scientists 847–856 publications: 3 scientists 857–866 publications: 5 scientists 867–876 publications: 5 scientists 877–886 publications: 11 scientists 887–896 publications: 3 scientists 897–906 publications: 4 scientists 907–916 publications: 7 scientists 917–926 publications: 5 scientists 927–936 publications: 6 scientists 937–946 publications: 6 scientists 947–956 publications: 3 scientists 957–966 publications: 7 scientists 967–976 publications: 2 scientists 977–986 publications: 2 scientists 987–996 publications: 1 scientists 997–1,006 publications: 5 scientists 1,007–1,016 publications: 2 scientists 1,017–1,026 publications: 2 scientists 1,027 publications: 1 scientists 1,028+ publications: 100 scientists
47 publications 1,028+

This scientist: 149 publications — 26th percentile

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

The last bar groups every scientist with 1,028 publications or more.

Karel Šimek D-index placement in Biology and Biochemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Biology and Biochemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Karel Šimek sits on this spectrum.

40–41 D-Index: 80 scientists 42–43 D-Index: 183 scientists 44–45 D-Index: 317 scientists 46–47 D-Index: 504 scientists 48–49 D-Index: 718 scientists 50–51 D-Index: 900 scientists 52–53 D-Index: 1,026 scientists 54–55 D-Index: 1,150 scientists 56–57 D-Index: 1,236 scientists 58–59 D-Index: 1,253 scientists 60–61 D-Index: 1,163 scientists 62–63 D-Index: 1,131 scientists 64–65 D-Index: 1,032 scientists 66–67 D-Index: 897 scientists 68–69 D-Index: 814 scientists 70–71 D-Index: 715 scientists 72–73 D-Index: 709 scientists 74–75 D-Index: 596 scientists 76–77 D-Index: 512 scientists 78–79 D-Index: 473 scientists 80–81 D-Index: 412 scientists 82–83 D-Index: 373 scientists 84–85 D-Index: 358 scientists 86–87 D-Index: 285 scientists 88–89 D-Index: 273 scientists 90–91 D-Index: 227 scientists 92–93 D-Index: 208 scientists 94–95 D-Index: 193 scientists 96–97 D-Index: 153 scientists 98–99 D-Index: 157 scientists 100–101 D-Index: 148 scientists 102–103 D-Index: 120 scientists 104–105 D-Index: 113 scientists 106–107 D-Index: 100 scientists 108–109 D-Index: 86 scientists 110–111 D-Index: 67 scientists 112–113 D-Index: 72 scientists 114–115 D-Index: 73 scientists 116–117 D-Index: 64 scientists 118–119 D-Index: 53 scientists 120–121 D-Index: 60 scientists 122–123 D-Index: 54 scientists 124–125 D-Index: 43 scientists 126–127 D-Index: 38 scientists 128–129 D-Index: 49 scientists 130–131 D-Index: 26 scientists 132–133 D-Index: 18 scientists 134–135 D-Index: 23 scientists 136–137 D-Index: 32 scientists 138–139 D-Index: 32 scientists 140–141 D-Index: 27 scientists 142–143 D-Index: 19 scientists 144–145 D-Index: 22 scientists 146–147 D-Index: 12 scientists 148–149 D-Index: 16 scientists 150–151 D-Index: 14 scientists 152–153 D-Index: 10 scientists 154–155 D-Index: 13 scientists 156–157 D-Index: 10 scientists 158–159 D-Index: 7 scientists 160–161 D-Index: 9 scientists 162–163 D-Index: 13 scientists 164–165 D-Index: 4 scientists 166 D-Index: 4 scientists 167+ D-Index: 98 scientists
40 D-Index 167+

This scientist: 62 D-Index — 46th percentile

46% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 167 D-Index or more.

Overview

Karel Šimek is affiliated with the Institute of Hydrobiology at the Biology Centre of the Academy of Sciences of the Czech Republic. Their research primarily focuses on Environmental Science and Biochemistry, Genetics and Molecular Biology, with significant contributions in subfields such as Ecology, Molecular Biology, Oceanography, and Environmental Chemistry.

The main topics of their work include:

  • Microbial Community Ecology and Physiology
  • Protist diversity and phylogeny
  • Marine and coastal ecosystems
  • Environmental DNA in Biodiversity Studies
  • Genomics and Phylogenetic Studies
  • Aquatic Ecosystems and Phytoplankton Dynamics
  • Aquatic Ecosystems and Biodiversity

Šimek has published extensively, with notable contributions to journals such as bioRxiv (Cold Spring Harbor Laboratory), The ISME Journal, Environmental Microbiology, Microbiome, and Water Research. The top venues by number of publications include:

  • bioRxiv (Cold Spring Harbor Laboratory)
  • The ISME Journal
  • Environmental Microbiology
  • Microbiome
  • Water Research

Recent selected papers include:

  • "Expanding ecological assessment by integrating microorganisms into routine freshwater biomonitoring," 2020, Water Research
  • "Recovery of freshwater microbial communities after extreme rain events is mediated by cyclic succession," 2021, Nature Microbiology
  • "Bacterial and Eukaryotic Small-Subunit Amplicon Data Do Not Provide a Quantitative Picture of Microbial Communities, but They Are Reliable in the Context of Ecological Interpretations," 2020, mSphere
  • "High-resolution metagenomic reconstruction of the freshwater spring bloom," 2023, Microbiome
  • "CARD-FISH in the Sequencing Era: Opening a New Universe of Protistan Ecology," 2021, Frontiers in Microbiology

Frequent co-authors associated with Šimek include Indranil Mukherjee, Tanja Shabarova, Michaela M. Salcher, Petr Znachor, and Vojtěch Kasalický. Collaborations with these colleagues span multiple projects and publications, reflecting active engagement in microbial ecology and environmental microbiology research.

Best Publications

  • Changes in Bacterial Community Composition and Dynamics and Viral Mortality Rates Associated with Enhanced Flagellate Grazing in a Mesoeutrophic Reservoir

    Karel Šimek;Karel Šimek;Jakob Pernthaler;Markus G. Weinbauer;Karel Hornák

  • Ciliategrazing on picoplankton in a eutrophic reservoir during the summer phytoplankton maximum: A study at the species and community level

    Karel Šimek;Jitka Bobková;Miroslav Macek;Jiři Nedoma

  • Prey-size selection by freshwater flagellated protozoa

    Thomas H. Chrzanowski;Karel Šimek

  • Morphological and compositional shifts in an experimental bacterial community influenced by protists with contrasting feeding modes.

    K Simek;J Vrba;J Pernthaler;T Posch

  • Direct and indirect evidence of size-selective grazing on pelagic bacteria by freshwater nanoflagellates.

    Karel Šimek;Thomas H. Chrzanowski

  • Contrasting bacterial strategies to coexist with a flagellate predator in an experimental microbial assemblage.

    J Pernthaler;T Posch;K Simek;J Vrba

  • Expanding ecological assessment by integrating microorganisms into routine freshwater biomonitoring

    M. Sagova-Mareckova;J. Boenigk;A. Bouchez;K. Cermakova

  • Selective feeding behaviour of key free-living protists: avenues for continued study

    David J. S. Montagnes;Ana B. Barbosa;Jens Boenigk;Keith Davidson

  • The diversity of the Limnohabitans genus, an important group of freshwater bacterioplankton, by characterization of 35 isolated strains.

    Vojtěch Kasalický;Jan Jezbera;Martin W. Hahn;Karel Šimek

  • Maximum growth rates and possible life strategies of different bacterioplankton groups in relation to phosphorus availability in a freshwater reservoir

    Karel Šimek;Karel Šimek;Karel Horňák;Karel Horňák;Jan Jezbera;Jan Jezbera;Jiří Nedoma

  • Shifts in bacterial community composition associated with different microzooplankton size fractions in a eutrophic reservoir

    Karel Šimek;Karel Šimek;Petra Kojecká;Petra Kojecká;Jiří Nedoma;Petr Hartman

  • Predator-specific enrichment of actinobacteria from a cosmopolitan freshwater clade in mixed continuous culture.

    Jakob Pernthaler;Thomas Posch;Karel Simek;Karel Simek;Jaroslav Vrba

  • Food selection by bacterivorous protists: insight from the analysis of the food vacuole content by means of fluorescence in situ hybridization

    Jan Jezbera;Jan Jezbera;Karel Horňák;Karel Horňák;Karel Šimek;Karel Šimek

  • Top-down effects on the size-biomass distribution of a freshwater bacterioplankton community

    Pernthaler J;Sattler B;Simek K;Schwarzenbacher A

  • Synergistic and antagonistic effects of viral lysis and protistan grazing on bacterial biomass, production and diversity.

    Markus G. Weinbauer;Karel Hornák;Jan Jezbera;Jiři Nedoma

  • Unveiling Distribution Patterns of Freshwater Phytoplankton by a Next Generation Sequencing Based Approach

    Alexander Eiler;Stina Drakare;Stefan Bertilsson;Jakob Pernthaler

  • Response of Alteromonadaceae and Rhodobacteriaceae to glucose and phosphorus manipulation in marine mesocosms

    Elke Allers;Laura Gómez-Consarnau;Jarone Pinhassi;Josep M. Gasol

  • Investigations on pelagic food webs in mountain lakes - aims and methods

    Viera Straškrabová;Cristiana Callieri;Presentacion Carrillo;Luis Cruz-Pizarro

  • Predator-induced changes of bacterial size-structure and productivity studied on an experimental microbial community

    Thomas Posch;Karel Simek;Jaroslav Vrba;Jakob Pernthaler

  • Ecological role and bacterial grazing of Halteria spp.: small freshwater oligotrichs as dominant pelagic ciliate bacterivores.

    Karel Šimek;Klaus Jürgens;Jiří Nedoma;Marta Comerma

Frequent Co-Authors

John R. Dolan
John R. Dolan Université Paris Cité
Jakob Pernthaler
Jakob Pernthaler University of Zurich
Martin W. Hahn
Martin W. Hahn University of Innsbruck
Josef Hejzlar
Josef Hejzlar Czech Academy of Sciences
Markus G. Weinbauer
Markus G. Weinbauer Centre national de la recherche scientifique, CNRS
Roland Psenner
Roland Psenner University of Innsbruck
Josep M. Gasol
Josep M. Gasol Spanish National Research Council
Hans-Peter Grossart
Hans-Peter Grossart University of Potsdam
Lubomír Adamec
Lubomír Adamec Czech Academy of Sciences
Rudolf Amann
Rudolf Amann Max Planck Institute for Marine Microbiology

External Links

Personal website of Karel Šimek

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

Expanding your studies in Biology and Biochemistry can open diverse career possibilities in healthcare, research, and administration. Many professionals now consider advancing their skills through flexible, high-quality online degree programs.

If you’re interested in healthcare management, exploring cahme accreditation mha programs can lead to leadership roles overseeing healthcare organizations. For nurses aiming for advanced practice or leadership, there are msn to dnp online no clinicals options that provide flexibility while deepening clinical and administrative expertise.

Those interested in high-level policy or consultancy work may consider the best doctorate of healthcare administration programs to gain insights into strategic decision-making. Additionally, science graduates can step into pharmacy through accessible learning from online pharmd programs.

Whether your goal is frontline healthcare, research, or administration, these programs support career advancement and specialization, making them valuable pathways for biology and biochemistry graduates.

Best Scientists Citing Karel Šimek

Hans-Peter Grossart

Hans-Peter Grossart

University of Potsdam

Publications: 65

Jakob Pernthaler

Jakob Pernthaler

University of Zurich

Publications: 59

Télesphore Sime-Ngando

Télesphore Sime-Ngando

University of Clermont Auvergne

Publications: 42

Josep M. Gasol

Josep M. Gasol

Spanish National Research Council

Publications: 41

Klaus Jürgens

Klaus Jürgens

Leibniz Institute for Baltic Sea Research

Publications: 41

Martin W. Hahn

Martin W. Hahn

University of Innsbruck

Publications: 38

Markus G. Weinbauer

Markus G. Weinbauer

Centre national de la recherche scientifique, CNRS

Publications: 38

Katherine D. McMahon

Katherine D. McMahon

University of Wisconsin–Madison

Publications: 28

Stefan Bertilsson

Stefan Bertilsson

Swedish Research Council

Publications: 26

Stéphan Jacquet

Stéphan Jacquet

INRAE : Institut national de recherche pour l'agriculture, l'alimentation et l'environnement

Publications: 25

Hartmut Arndt

Hartmut Arndt

University of Cologne

Publications: 25

Rudolf Amann

Rudolf Amann

Max Planck Institute for Marine Microbiology

Publications: 22

Qinglong L. Wu

Qinglong L. Wu

Chinese Academy of Sciences

Publications: 21

Roland Psenner

Roland Psenner

University of Innsbruck

Publications: 21

Ruben Sommaruga

Ruben Sommaruga

University of Innsbruck

Publications: 20

Eva S. Lindström

Eva S. Lindström

Uppsala University

Publications: 19

Trending Scientists

Krassimir N. Bozhilov

Krassimir N. Bozhilov

University of California, Riverside

Peter Van Loo

Peter Van Loo

The Francis Crick Institute

Jianxin Shi

Jianxin Shi

National Institutes of Health

Katarina Čufar

Katarina Čufar

University of Ljubljana

Luca Larcher

Luca Larcher

University of Modena and Reggio Emilia

Bernd Girod

Bernd Girod

Stanford University

Jerome Brunelin

Jerome Brunelin

Jean Monnet University

Stephen M. Richardson

Stephen M. Richardson

University of Manchester

Ying Wu

Ying Wu

East China Normal University

Minoru Kusakabe

Minoru Kusakabe

Okayama University

William T. Riley

William T. Riley

National Institutes of Health

Yang Yang Li

Yang Yang Li

City University of Hong Kong

Dennis K. P. Ng

Dennis K. P. Ng

Chinese University of Hong Kong

Patricia J. Y. Wong

Patricia J. Y. Wong

Nanyang Technological University

Thomas J. Near

Thomas J. Near

Yale University

Hal Gurgenci

Hal Gurgenci

University of Queensland

Related Biology and Biochemistry Rankings & Guides

2026 Is Psychiatric Mental Health Nurse Practitioner a Hard Major? What Students Should Know

2026 Is Psychiatric Mental Health Nurse Practitioner a Hard Major? What Students Should Know
2026 How to Become a Credentialing Specialist: Education, Salary, and Job Outlook

2026 How to Become a Credentialing Specialist: Education, Salary, and Job Outlook
2026 Is Gerontology a Hard Major? What Students Should Know

2026 Is Gerontology a Hard Major? What Students Should Know
2026 How to Become a Pediatric Occupational Therapist: Education, Salary, and Job Outlook

2026 How to Become a Pediatric Occupational Therapist: Education, Salary, and Job Outlook
2026 Are Online Radiology Technician Degrees Respected by Employers?

2026 Are Online Radiology Technician Degrees Respected by Employers?
2026 Online Clinical Research Management Degree Programs Costs: Tuition & Fees

2026 Online Clinical Research Management Degree Programs Costs: Tuition & Fees
2026 Military-Friendly Online Pharmacy Degree Programs: Benefits, Accreditation, and Career Outcomes

2026 Military-Friendly Online Pharmacy Degree Programs: Benefits, Accreditation, and Career Outcomes
2026 Quality Improvement in Healthcare Careers: Skills, Education, Salary & Job Outlook

2026 Quality Improvement in Healthcare Careers: Skills, Education, Salary & Job Outlook
2026 How to Verify Accreditation for Medical Billing & Coding Degree Programs

2026 How to Verify Accreditation for Medical Billing & Coding Degree Programs
2026 Public Health Degree Master's Programs You Can Start Without Meeting All Requirements

2026 Public Health Degree Master's Programs You Can Start Without Meeting All Requirements
2026 How Fast Can You Get a Biology Degree Online?

2026 How Fast Can You Get a Biology Degree Online?
2026 MRI Tech vs. Radiology Tech: Explaining the Difference

2026 MRI Tech vs. Radiology Tech: Explaining the Difference
2026 Which Schools Offer Flexible Start-Anytime Enrollment for a Biology Program?

2026 Which Schools Offer Flexible Start-Anytime Enrollment for a Biology Program?
2026 Fastest Online Healthcare Administration Degree Programs You Can Finish in Under 2 Years

2026 Fastest Online Healthcare Administration Degree Programs You Can Finish in Under 2 Years
2026 HIM vs. Medical Billing and Coding: Explaining the Difference

2026 HIM vs. Medical Billing and Coding: Explaining the Difference
2026 Fastest Online Health Informatics Degree Programs You Can Finish in Under 2 Years

2026 Fastest Online Health Informatics Degree Programs You Can Finish in Under 2 Years
2026 Is Demand for Bioinformatics Degree Graduates Growing or Declining?

2026 Is Demand for Bioinformatics Degree Graduates Growing or Declining?
2026 Cheapest and Shortest Online Ultrasound Technology Degree Programs That Pay Well: Cost, Duration, and Salary Outlook

2026 Cheapest and Shortest Online Ultrasound Technology Degree Programs That Pay Well: Cost, Duration, and Salary Outlook
2026 How To Become a Marine Biologist? Salary & Career Paths

2026 How To Become a Marine Biologist? Salary & Career Paths
2026 Do Online Pharmacy Programs Offer Weekly Start Dates? Enrollment Calendar & Start Options

2026 Do Online Pharmacy Programs Offer Weekly Start Dates? Enrollment Calendar & Start Options
2026 Part-Time vs. Full-Time Ultrasound Technology Degree Programs

2026 Part-Time vs. Full-Time Ultrasound Technology Degree Programs

Recently Published Articles

2026 Fastest Online Aerospace Engineering Degree Programs You Can Finish in Under 2 Years

2026 Fastest Online Aerospace Engineering Degree Programs You Can Finish in Under 2 Years
2026 Different Types of Fashion Merchandising Degrees and Their Salaries

2026 Different Types of Fashion Merchandising Degrees and Their Salaries
2026 How to Become a Nutritionist in Missouri

2026 How to Become a Nutritionist in Missouri
2026 Online Engineering Degree Programs for Veterans: GI Bill Benefits, Costs & Top Considerations

2026 Online Engineering Degree Programs for Veterans: GI Bill Benefits, Costs & Top Considerations
2026 Online Graphic Design Degree Programs for Veterans: GI Bill Benefits, Costs & Top Considerations

2026 Online Graphic Design Degree Programs for Veterans: GI Bill Benefits, Costs & Top Considerations
2026 Best Online Spanish Programs for Professionals Seeking Translation Careers

2026 Best Online Spanish Programs for Professionals Seeking Translation Careers
2026 Best Value Online Social Work Master's Degrees: Affordable Accredited Programs with the Highest ROI

2026 Best Value Online Social Work Master's Degrees: Affordable Accredited Programs with the Highest ROI
2026 Military-Friendly Online Economics Degree Programs: Benefits, Accreditation, and Career Outcomes

2026 Military-Friendly Online Economics Degree Programs: Benefits, Accreditation, and Career Outcomes
2026 Best College Majors to Pursue: Salary & Job Growth Data

2026 Best College Majors to Pursue: Salary & Job Growth Data
2026 Is a Paralegal Online Degree Worth It?

2026 Is a Paralegal Online Degree Worth It?
2026 How to Become a BCBA in New Jersey

2026 How to Become a BCBA in New Jersey
2026 Fastest Online Pharmacy Technician Certificate Programs

2026 Fastest Online Pharmacy Technician Certificate Programs
2026 Different Types of Animal Science Degrees and Their Salaries

2026 Different Types of Animal Science Degrees and Their Salaries
2026 Political Science Degree Coursework Explained: What Classes Can You Expect to Take?

2026 Political Science Degree Coursework Explained: What Classes Can You Expect to Take?
2026 Online Management Information Systems Bachelor's Degree Programs With No SAT or ACT Requirements

2026 Online Management Information Systems Bachelor's Degree Programs With No SAT or ACT Requirements
2026 Best Online Nutrition Certifications

2026 Best Online Nutrition Certifications
2026 Accelerated Online Political Science Degree Programs VS Weekly Start Online Degrees: Which Is Faster

2026 Accelerated Online Political Science Degree Programs VS Weekly Start Online Degrees: Which Is Faster
2026 Fastest Online Information Technology Master's Degree Programs You Can Finish in Under 2 Years

2026 Fastest Online Information Technology Master's Degree Programs You Can Finish in Under 2 Years
2026 Admission Requirements for Clinical Mental Health Counseling Degree Master's Programs: GPA, Prerequisites, and Acceptance Criteria

2026 Admission Requirements for Clinical Mental Health Counseling Degree Master's Programs: GPA, Prerequisites, and Acceptance Criteria
2026 Most Affordable Master’s in Child and Adolescent Psychology Online

2026 Most Affordable Master’s in Child and Adolescent Psychology Online
2026 Best Online Criminal Justice Degrees for Victim Advocacy Careers

2026 Best Online Criminal Justice Degrees for Victim Advocacy Careers