J.H. van Wyk

2.6k total citations
81 papers, 2.0k citations indexed

About

J.H. van Wyk is a scholar working on Global and Planetary Change, Ecology, Evolution, Behavior and Systematics and Ecology. According to data from OpenAlex, J.H. van Wyk has authored 81 papers receiving a total of 2.0k indexed citations (citations by other indexed papers that have themselves been cited), including 37 papers in Global and Planetary Change, 31 papers in Ecology, Evolution, Behavior and Systematics and 18 papers in Ecology. Recurrent topics in J.H. van Wyk's work include Amphibian and Reptile Biology (36 papers), Animal Behavior and Reproduction (29 papers) and Species Distribution and Climate Change (12 papers). J.H. van Wyk is often cited by papers focused on Amphibian and Reptile Biology (36 papers), Animal Behavior and Reproduction (29 papers) and Species Distribution and Climate Change (12 papers). J.H. van Wyk collaborates with scholars based in South Africa, United States and Canada. J.H. van Wyk's co-authors include James R. Spotila, P. le Fras N. Mouton, William E. Cooper, Edward Archer, Susana Clusella‐Trullas, Gideon Wolfaardt, Martin J. Whiting, PJ Oberholster, Paul J. Oberholster and Ben V. Burger and has published in prestigious journals such as SHILAP Revista de lepidopterología, Ecology and Environmental Pollution.

In The Last Decade

J.H. van Wyk

80 papers receiving 1.9k citations

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
J.H. van Wyk South Africa 24 1.1k 907 438 368 353 81 2.0k
Christoph Sperisen Switzerland 29 1.1k 1.1× 525 0.6× 544 1.2× 178 0.5× 736 2.1× 54 3.5k
Abraham Addo‐Bediako South Africa 17 695 0.7× 253 0.3× 1.3k 3.0× 512 1.4× 702 2.0× 48 2.2k
Lloyd C. Fitzpatrick United States 23 627 0.6× 750 0.8× 856 2.0× 147 0.4× 121 0.3× 61 1.9k
Bryce A. Richardson United States 23 280 0.3× 343 0.4× 644 1.5× 250 0.7× 274 0.8× 68 1.5k
Till Eggers Germany 18 652 0.6× 318 0.4× 695 1.6× 159 0.4× 173 0.5× 22 1.8k
Lars Pettersson Sweden 29 1.0k 1.0× 532 0.6× 879 2.0× 321 0.9× 316 0.9× 81 2.4k
A. Louise Allcock Ireland 29 1.2k 1.2× 829 0.9× 1.7k 3.9× 98 0.3× 381 1.1× 146 3.1k
Wen Bo Liao China 30 1.5k 1.4× 1.2k 1.3× 723 1.7× 237 0.6× 236 0.7× 118 2.2k
Stine Slotsbo Denmark 17 447 0.4× 268 0.3× 794 1.8× 241 0.7× 329 0.9× 57 1.5k
Francisco Molina‐Freaner Mexico 28 973 0.9× 155 0.2× 308 0.7× 139 0.4× 286 0.8× 108 1.9k

Countries citing papers authored by J.H. van Wyk

Since Specialization
Citations

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

Fields of papers citing papers by J.H. van Wyk

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by J.H. van Wyk. 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 J.H. van Wyk. The network helps show where J.H. van Wyk may publish in the future.

Co-authorship network of co-authors of J.H. van Wyk

This figure shows the co-authorship network connecting the top 25 collaborators of J.H. van Wyk. A scholar is included among the top collaborators of J.H. van Wyk 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 J.H. van Wyk. J.H. van Wyk 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.
Wyk, J.H. van, et al.. (2021). Impacts of three glyphosate formulations on gonadal development of Xenopus laevis. SHILAP Revista de lepidopterología. 5. 1002941930–1002941930. 1 indexed citations
2.
Archer, Edward, et al.. (2020). Investigating (anti)estrogenic activities within South African wastewater and receiving surface waters: Implication for reliable monitoring. Environmental Pollution. 263(Pt A). 114424–114424. 26 indexed citations
3.
Archer, Edward, et al.. (2020). Exposure Impacts of Environmentally Relevant Concentrations of a Glufosinate Ammonium Herbicide Formulation on Larval Development and Thyroid Histology of Xenopus laevis. Archives of Environmental Contamination and Toxicology. 80(4). 717–725. 13 indexed citations
4.
Oberholster, Paul J., et al.. (2019). A laboratory based exposure of Microcystis and Oscillatoria cyanobacterial isolates to heterotrophic bacteria. Toxicon. 165. 1–12. 8 indexed citations
5.
Wyk, J.H. van, et al.. (2018). Bacteria as biological control agents of freshwater cyanobacteria: is it feasible beyond the laboratory?. Applied Microbiology and Biotechnology. 102(23). 9911–9923. 37 indexed citations
6.
Dabrowski, J., Paul J. Oberholster, Johan Steyl, et al.. (2017). Thyroid function of steatitis-affected Mozambique tilapia Oreochromis mossambicus from a sub-tropical African reservoir. Diseases of Aquatic Organisms. 125(2). 101–113. 1 indexed citations
7.
Archer, Edward, Gideon Wolfaardt, & J.H. van Wyk. (2017). Review: <i>Pharmaceutical and personal care products (PPCPs) as endocrine disrupting contaminants (EDCs) in South African surface waters</i>. Water SA. 43(4). 684–684. 66 indexed citations
8.
Wyk, J.H. van, et al.. (2017). Comparative Early Life Stage Toxicity of the African Clawed Frog, Xenopus laevis Following Exposure to Selected Herbicide Formulations Applied to Eradicate Alien Plants in South Africa. Archives of Environmental Contamination and Toxicology. 75(1). 8–16. 17 indexed citations
9.
Oberholster, PJ, et al.. (2016). An overview of cyanobacterial bloom occurrences and research in Africa over the last decade. Harmful Algae. 60. 11–26. 108 indexed citations
10.
Wyk, J.H. van, et al.. (2016). An In Vitro and In Vivo Assessment of Endocrine Disruptive Activity in a Major South African River. Water Air & Soil Pollution. 227(2). 7 indexed citations
11.
Botha, C.J., Jan G. Myburgh, T.W. Naudé, et al.. (2009). Molasses as a possible cause of an "endocrine disruptive syndrome. Onderstepoort Journal of Veterinary Research. 1 indexed citations
12.
Botha, C.J., Jan G. Myburgh, T.W. Naudé, et al.. (2009). Molasses as a possible cause of an ''endocrine disruptive syndrome'' in calves. Onderstepoort Journal of Veterinary Research. 76(2). 209–25. 4 indexed citations
13.
Esterhuyse, Maria M., Caren C. Helbing, & J.H. van Wyk. (2009). Isolation and characterization of three estrogen receptor transcripts in Oreochromis mossambicus (Peters). The Journal of Steroid Biochemistry and Molecular Biology. 119(1-2). 26–34. 16 indexed citations
14.
15.
Cooper, William E., et al.. (1999). Incompletely Protective Refuges: Selection and Associated Defences by a Lizard, Cordylus cordylus (Squamata: Cordylidae). Ethology. 105(8). 687–700. 30 indexed citations
16.
Mouton, P. le Fras N., et al.. (1995). Sexual dimorphism in two girdled lizard species,Cordylus nigerandCordylus cordylus. South African Journal of Zoology. 30(4). 187–196. 27 indexed citations
17.
Wyk, J.H. van. (1995). The Male Reproductive Cycle of the Lizard, Cordylus giganteus (Sauria: Cordylidae). Journal of Herpetology. 29(4). 522–522. 29 indexed citations
18.
Wyk, J.H. van & P. le Fras N. Mouton. (1992). Glandular epidermal structures in cordylid lizards. Amphibia-Reptilia. 13(1). 1–12. 30 indexed citations
19.
Wyk, J.H. van. (1991). Biennial reproduction in the female viviparous lizard Cordylus giganteus. Amphibia-Reptilia. 12(3). 329–342. 31 indexed citations
20.
Wyk, J.H. van. (1989). The female reproductive cycle of the lizard,Cordylus polyzonus polyzonus(Sauria: Cordylidae) in the Orange Free State. South African Journal of Zoology. 24(4). 263–269. 16 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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