Karl‐Paul Witzel

2.6k total citations · 1 hit paper
33 papers, 2.0k citations indexed

About

Karl‐Paul Witzel is a scholar working on Ecology, Pollution and Molecular Biology. According to data from OpenAlex, Karl‐Paul Witzel has authored 33 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 28 papers in Ecology, 13 papers in Pollution and 11 papers in Molecular Biology. Recurrent topics in Karl‐Paul Witzel's work include Microbial Community Ecology and Physiology (24 papers), Wastewater Treatment and Nitrogen Removal (13 papers) and Genomics and Phylogenetic Studies (6 papers). Karl‐Paul Witzel is often cited by papers focused on Microbial Community Ecology and Physiology (24 papers), Wastewater Treatment and Nitrogen Removal (13 papers) and Genomics and Phylogenetic Studies (6 papers). Karl‐Paul Witzel collaborates with scholars based in Germany, Switzerland and Chile. Karl‐Paul Witzel's co-authors include Andreas Fesefeldt, Gesche Braker, Johannes F. Imhoff, Pilar Junier, Cristina Dorador, Irma Vila, Thomas Junier, Günter Jost, Ok-Sun Kim and Hermann Bothe and has published in prestigious journals such as Journal of Geophysical Research Atmospheres, Applied and Environmental Microbiology and FEMS Microbiology Reviews.

In The Last Decade

Karl‐Paul Witzel

32 papers receiving 1.9k citations

Hit Papers

Development of PCR Primer Systems for Amplification of Ni... 1998 2026 2007 2016 1998 200 400 600
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Development of PCR Primer Systems for Amplification of Nitrite Reductase Genes (nirKandnirS) To Detect Denitrifying Bacteria in Environmental Samples
    1998 723 citations Gesche Braker, Andreas Fesefeldt et al. Applied and Environmental Microbiology profile →

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Karl‐Paul Witzel Germany 19 1.4k 994 555 362 198 33 2.0k
Maria Tourna Greece 16 1.3k 1.0× 1.1k 1.1× 492 0.9× 341 0.9× 183 0.9× 19 2.0k
Laura E. Lehtovirta‐Morley United Kingdom 20 1.4k 1.0× 1.1k 1.1× 618 1.1× 369 1.0× 271 1.4× 35 2.2k
So‐Jeong Kim South Korea 22 839 0.6× 545 0.5× 544 1.0× 376 1.0× 176 0.9× 73 1.5k
Pierre Offre Netherlands 20 1.6k 1.2× 742 0.7× 1.0k 1.9× 531 1.5× 178 0.9× 24 2.7k
Karin Enwall Sweden 8 1.2k 0.9× 956 1.0× 308 0.6× 454 1.3× 179 0.9× 9 2.0k
S. Hallet France 9 1.0k 0.8× 794 0.8× 421 0.8× 369 1.0× 113 0.6× 9 2.0k
James W. Voordeckers United States 13 964 0.7× 440 0.4× 530 1.0× 227 0.6× 177 0.9× 14 1.7k
Stephan Stubner Germany 18 1.1k 0.8× 431 0.4× 718 1.3× 848 2.3× 155 0.8× 23 2.0k
Baozhan Wang China 25 911 0.7× 1.1k 1.1× 483 0.9× 238 0.7× 164 0.8× 52 2.1k
Nathalie Fortin Canada 25 691 0.5× 766 0.8× 724 1.3× 615 1.7× 83 0.4× 55 2.4k

Countries citing papers authored by Karl‐Paul Witzel

Since Specialization
Citations

This map shows the geographic impact of Karl‐Paul Witzel's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Karl‐Paul Witzel with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Karl‐Paul Witzel more than expected).

Fields of papers citing papers by Karl‐Paul Witzel

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Karl‐Paul Witzel. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Karl‐Paul Witzel. The network helps show where Karl‐Paul Witzel may publish in the future.

Co-authorship network of co-authors of Karl‐Paul Witzel

This figure shows the co-authorship network connecting the top 25 collaborators of Karl‐Paul Witzel. A scholar is included among the top collaborators of Karl‐Paul Witzel based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Karl‐Paul Witzel. Karl‐Paul Witzel is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Junier, Pilar, et al.. (2014). Genetic diversity of Rhizobium present in nodules of Phaseolus vulgaris L. cultivated in two soils of the central region in Chile. Applied Soil Ecology. 80. 60–66. 9 indexed citations
2.
Dorador, Cristina, Irma Vila, Francisco Remonsellez, Johannes F. Imhoff, & Karl‐Paul Witzel. (2010). Unique clusters of Archaea in Salar de Huasco, an athalassohaline evaporitic basin of the Chilean Altiplano. FEMS Microbiology Ecology. 73(2). no–no. 58 indexed citations
3.
Kim, Ok-Sun, Johannes F. Imhoff, Karl‐Paul Witzel, & Pilar Junier. (2010). Distribution of denitrifying bacterial communities in the stratified water column and sediment–water interface in two freshwater lakes and the Baltic Sea. Aquatic Ecology. 45(1). 99–112. 39 indexed citations
4.
Junier, Pilar, Verónica Molina, Cristina Dorador, et al.. (2009). Phylogenetic and functional marker genes to study ammonia-oxidizing microorganisms (AOM) in the environment. Applied Microbiology and Biotechnology. 85(3). 425–440. 135 indexed citations
5.
Junier, Pilar, Ok-Sun Kim, Thomas Junier, et al.. (2009). Community analysis of betaproteobacterial ammonia-oxidizing bacteria using the amoCAB operon. Applied Microbiology and Biotechnology. 83(1). 175–188. 15 indexed citations
6.
Junier, Pilar, Margarita Carú, & Karl‐Paul Witzel. (2009). Effect of common bean (Phaseolus vulgaris L.) on the community composition of ammonia-oxidizing bacteria in soil previously cultivated with Medicago sativa. European Journal of Soil Biology. 45(3). 252–258. 6 indexed citations
7.
Sabehi, Gazalah, Itai Sharon, Karl‐Paul Witzel, et al.. (2008). Widespread distribution of proteorhodopsins in freshwater and brackish ecosystems. The ISME Journal. 2(6). 656–662. 89 indexed citations
8.
Junier, Pilar, Thomas Junier, & Karl‐Paul Witzel. (2008). TRiFLe, a Program for In Silico Terminal Restriction Fragment Length Polymorphism Analysis with User-Defined Sequence Sets. Applied and Environmental Microbiology. 74(20). 6452–6456. 76 indexed citations
9.
Kim, Ok-Sun, Pilar Junier, Johannes F. Imhoff, & Karl‐Paul Witzel. (2008). Comparative analysis of ammonia monooxygenase (amoA) genes in the water column and sedimentâwater interface of two lakes and the Baltic Sea. FEMS Microbiology Ecology. 66(2). 367–378. 28 indexed citations
10.
Junier, Pilar, Ok-Sun Kim, Ora Hadas, Johannes F. Imhoff, & Karl‐Paul Witzel. (2008). Evaluation of PCR Primer Selectivity and Phylogenetic Specificity by Using Amplification of 16S rRNA Genes from Betaproteobacterial Ammonia-Oxidizing Bacteria in Environmental Samples. Applied and Environmental Microbiology. 74(16). 5231–5236. 30 indexed citations
11.
Junier, Pilar, Ok-Sun Kim, Verónica Molina, et al.. (2008). Comparative in silico analysis of PCR primers suited for diagnostics and cloning of ammonia monooxygenase genes from ammonia-oxidizing bacteria. FEMS Microbiology Ecology. 64(1). 141–152. 33 indexed citations
12.
13.
Bakhrouf, Amina, et al.. (2008). Resuscitation of eleven-year VBNC Citrobacter. Journal of Water and Health. 6(4). 565–568. 17 indexed citations
14.
Dorador, Cristina, Irma Vila, Johannes F. Imhoff, & Karl‐Paul Witzel. (2008). Cyanobacterial diversity in Salar de Huasco, a high altitude saline wetland in northern Chile: an example of geographical dispersion?. FEMS Microbiology Ecology. 64(3). 419–432. 59 indexed citations
15.
Dorador, Cristina, et al.. (2007). Cyanobacterial diversity in Salar de Huasco, a high altitude saline wetland in northern Chile: an example of geographical dispersion?. Helmholtz Centre for Ocean Research Kiel (GEOMAR). 1 indexed citations
16.
Wiese, Jutta, et al.. (2003). Wide Geographic Distribution of Bacteriophages That Lyse the Same Indigenous Freshwater Isolate ( Sphingomonas sp. Strain B18). Applied and Environmental Microbiology. 69(4). 2395–2398. 21 indexed citations
17.
Bothe, Hermann, Günter Jost, Michael Schloter, Bess B. Ward, & Karl‐Paul Witzel. (2000). Molecular analysis of ammonia oxidation and denitrification in natural environments. FEMS Microbiology Reviews. 24(5). 673–690. 234 indexed citations
18.
Braker, Gesche, Andreas Fesefeldt, & Karl‐Paul Witzel. (1998). Development of PCR Primer Systems for Amplification of Nitrite Reductase Genes (nirKandnirS) To Detect Denitrifying Bacteria in Environmental Samples. Applied and Environmental Microbiology. 64(10). 3769–3775. 723 indexed citations breakdown →
19.
Neve, Horst, et al.. (1993). Direct Electron Microscopy Study on the Morphological Diversity of Bacteriophage Populations in Lake Plußsee. Applied and Environmental Microbiology. 59(10). 3378–3384. 53 indexed citations
20.
Höfle, Manfred G., et al.. (1984). Research strategies in aquatic microbial ecology. MPG.PuRe (Max Planck Society). 19. 2 indexed citations

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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2026