Roger Knowles

12.0k total citations · 6 hit papers
140 papers, 9.5k citations indexed

About

Roger Knowles is a scholar working on Pollution, Molecular Biology and Ecology. According to data from OpenAlex, Roger Knowles has authored 140 papers receiving a total of 9.5k indexed citations (citations by other indexed papers that have themselves been cited), including 54 papers in Pollution, 44 papers in Molecular Biology and 33 papers in Ecology. Recurrent topics in Roger Knowles's work include Wastewater Treatment and Nitrogen Removal (45 papers), Microbial metabolism and enzyme function (30 papers) and Soil Carbon and Nitrogen Dynamics (21 papers). Roger Knowles is often cited by papers focused on Wastewater Treatment and Nitrogen Removal (45 papers), Microbial metabolism and enzyme function (30 papers) and Soil Carbon and Nitrogen Dynamics (21 papers). Roger Knowles collaborates with scholars based in Canada, United States and Philippines. Roger Knowles's co-authors include Charles Bédard, Tadashi Yoshinari, Russell K. Hynes, Tim R. Moore, Peter F. Dunfield, John A. Amaral, R. Dumont, David G. Patriquin, T. H. Blackburn and Nigel T. Roulet and has published in prestigious journals such as Nature, Journal of Geophysical Research Atmospheres and Applied and Environmental Microbiology.

In The Last Decade

Roger Knowles

139 papers receiving 8.5k citations

Hit Papers

5 papers align trajectories

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.

Denitrification.

1982 728 citations Roger Knowles profile →
Physiology, biochemistry, and specific inhibitors of CH4, NH4+, and CO oxidation by methanotrophs and nitrifiers

1989 691 citations Charles Bédard, Roger Knowles profile →
Denitrification

1982 620 citations Roger Knowles profile →
Methane production and consumption in temperate and subarctic peat soils: Response to temperature and pH

1993 589 citations Peter F. Dunfield, Roger Knowles et al. Soil Biology and Biochemistry profile →
Acetylene inhibition of nitrous oxide reduction by denitrifying bacteria

1976 578 citations Tadashi Yoshinari, Roger Knowles Biochemical and Biophysical Research Communications profile →
Acetylene inhibition of nitrous oxide reduction and measurement of denitrification and nitrogen fixation in soil

1977 444 citations Tadashi Yoshinari, Russell K. Hynes et al. Soil Biology and Biochemistry profile →

Peers — A (Enhanced Table)

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

Name	h						Papers	Cites
Roger Knowles Canada	46	3.8k	3.0k	2.6k	2.0k	1.5k	140	9.5k
W. H. Patrick United States	62	5.3k 1.4×	4.3k 1.4×	3.0k 1.1×	2.3k 1.2×	207 0.1×	223	13.0k
Elizabeth M. Baggs United Kingdom	49	3.6k 0.9×	3.6k 1.2×	1.8k 0.7×	6.5k 3.3×	557 0.4×	110	10.7k
William P. Inskeep United States	51	2.2k 0.6×	3.0k 1.0×	1.8k 0.7×	393 0.2×	2.0k 1.3×	135	8.1k
P. N. Soltanpour United States	22	1.4k 0.4×	1.8k 0.6×	2.3k 0.9×	4.2k 2.1×	318 0.2×	62	10.1k
Shuqing An China	46	3.7k 1.0×	1.0k 0.3×	1.3k 0.5×	684 0.3×	343 0.2×	302	8.0k
Oswald Van Cleemput Belgium	43	1.8k 0.5×	2.1k 0.7×	972 0.4×	2.8k 1.4×	201 0.1×	181	6.8k
Chao Wang China	46	3.0k 0.8×	1.2k 0.4×	1.0k 0.4×	2.7k 1.4×	1.2k 0.8×	277	8.3k
Richard P. Dick United States	55	2.2k 0.6×	2.2k 0.7×	2.1k 0.8×	6.6k 3.4×	810 0.5×	189	11.8k
M. E. Sumner United States	19	1.4k 0.4×	1.7k 0.6×	1.8k 0.7×	3.8k 1.9×	238 0.2×	41	9.1k
Nicolas Brüggemann Germany	56	2.4k 0.6×	1.7k 0.6×	805 0.3×	3.9k 2.0×	628 0.4×	198	8.5k

Countries citing papers authored by Roger Knowles

Since Specialization

Citations

This map shows the geographic impact of Roger Knowles'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 Roger Knowles with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Roger Knowles more than expected).

Fields of papers citing papers by Roger Knowles

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Roger Knowles. 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 Roger Knowles. The network helps show where Roger Knowles may publish in the future.

Co-authorship network of co-authors of Roger Knowles

This figure shows the co-authorship network connecting the top 25 collaborators of Roger Knowles. A scholar is included among the top collaborators of Roger Knowles 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 Roger Knowles. Roger Knowles is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

Sort: Min cites: Since: Top N: Style:

20 of 20 papers shown

Dunfield, Peter F., et al.. (1999). High-Affinity Methane Oxidation by a Soil Enrichment Culture Containing a Type II Methanotroph. Applied and Environmental Microbiology. 65(3). 1009–1014. 154 indexed citations

Amaral, John A., et al.. (1995). Denitrification associated with Groups I and II methanotrophs in a gradient enrichment system. FEMS Microbiology Ecology. 18(4). 289–298. 69 indexed citations

Richards, Samia & Roger Knowles. (1995). Inhibition of nitrous oxide reduction by a component of Hamilton Harbour sediment. FEMS Microbiology Ecology. 17(1). 39–46. 8 indexed citations

Roy, Ranjan & Roger Knowles. (1995). Differential inhibition by allylsulfide of nitrification and methane oxidation in freshwater sediment. Applied and Environmental Microbiology. 61(12). 4278–4283. 28 indexed citations

Knowles, Roger, et al.. (1995). Effect of ionophores on denitrification inFlexibacter canadensis. Canadian Journal of Microbiology. 41(3). 227–234. 13 indexed citations

Roy, Ranjan, Pierre Legendre, Roger Knowles, & M. N. Charlton. (1994). Denitrification and methane production in sediment of Hamilton Harbour (Canada). Microbial Ecology. 27(2). 123–141. 30 indexed citations

Knowles, Roger, et al.. (1994). Cellular regulation of nitrate uptake in denitrifying Flexibacter canadensis. Canadian Journal of Microbiology. 40(7). 576–582. 8 indexed citations

Jones, Alison M., Thomas C. Hollocher, & Roger Knowles. (1992). Nitrous oxide reductase ofFlexibacter canadensis: a unique membrane-bound enzyme. FEMS Microbiology Letters. 92(2). 205–209. 24 indexed citations

Bédard, Charles & Roger Knowles. (1991). Hypolimnetic O₂Consumption, Denitrification, and Methanogenesis in a Thermally Stratified Lake. Canadian Journal of Fisheries and Aquatic Sciences. 48(6). 1048–1054. 27 indexed citations

10.

Jones, Alison M. & Roger Knowles. (1991). Enumeration of Flexibacter canadensis in environmental samples by using a bacteriophage isolated from soil. Applied and Environmental Microbiology. 57(10). 3043–3045. 5 indexed citations

11.

Moore, Tim R. & Roger Knowles. (1990). Methane emissions from fen, bog and swamp peatlands in Quebec. Biogeochemistry. 11(1). 203 indexed citations

12.

Knowles, Roger, et al.. (1990). Effect of picolinic acid (2-pyridine carboxylic acid) on the oxidation of methane and ammonia in soil and in liquid culture. Soil Biology and Biochemistry. 22(5). 635–641. 13 indexed citations

13.

Germon, J. C. & Roger Knowles. (1988). Metabolism of acetylene and acetaldehyde by Rhodococcus rhodochrous. Canadian Journal of Microbiology. 34(3). 242–248. 10 indexed citations

14.

Knowles, Roger & D. R. S. Lean. (1987). Nitrification: A Significant Cause of Oxygen Depletion Under Winter Ice. Canadian Journal of Fisheries and Aquatic Sciences. 44(4). 743–749. 28 indexed citations

15.

Hynes, Russell K. & Roger Knowles. (1983). Inhibition of Chemoautotrophic Nitrification by Sodium Chlorate and Sodium Chlorite: a Reexamination. Applied and Environmental Microbiology. 45(4). 1178–1182. 98 indexed citations

16.

Hynes, Russell K. & Roger Knowles. (1980). DENITRIFICATION, NITROGEN FIXATION AND NITRIFICATION IN CONTINUOUS FLOW LABORATORY SOIL COLUMNS. Canadian Journal of Soil Science. 60(2). 355–363. 15 indexed citations

17.

Knowles, Roger, et al.. (1979). Effects of sulfide and acetylene on nitrous oxide reduction by soil and by Pseudomonas aeruginosa. Canadian Journal of Microbiology. 25(10). 1133–1138. 66 indexed citations

18.

Yoshinari, Tadashi & Roger Knowles. (1976). Acetylene inhibition of nitrous oxide reduction by denitrifying bacteria. Biochemical and Biophysical Research Communications. 69(3). 705–710. 578 indexed citations breakdown →

19.

Knowles, Roger. (1975). Fixation d'azote moléculaire dans la rhizosphère des macrophytes aquatiques. Bulletin de la Société Botanique de France. 122(sup2). 121–129. 1 indexed citations

20.

Knowles, Roger, et al.. (1968). Urease Activity in a Black Spruce Humus Sterilized by Gamma Radiation. Soil Science Society of America Journal. 32(4). 518–521. 5 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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