Estudios globales sobre el cadmio en relación con Theobroma cacao: Un análisis bibliométrico desde Scopus (1996 -2020)

Ligia  García; Fabio  Angulo Castro; Angel David  Hernández-Amasifuen; Mike Anderson  Corazon-Guivin; Javier  Alburquerque Vásquez; Juan Carlos  Guerrero-Abad; Erick  Arellanos; Jaris  Veneros; Nilton B.  Rojas B.; Segundo  Chavez Quintana; Manuel  Oliva

doi:10.17268/sci.agropecu.2021.065

Authors

Ligia García Instituto de Investigación, Innovación y Desarrollo para el Sector Agrario y Agroindustrial de la Región Amazonas (IIDAA). Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Chachapoyas https://orcid.org/0000-0001-7508-7516
Fabio Angulo Castro Instituto de Investigación, Innovación y Desarrollo para el Sector Agrario y Agroindustrial de la Región Amazonas (IIDAA). Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Chachapoyas https://orcid.org/0000-0003-0648-9479
Angel David Hernández-Amasifuen Departamento de Fitotecnia. Facultad de Agronomía, Universidad Nacional Agraria la Molina, La Molina. Av. La Molina s/n, Lima https://orcid.org/0000-0001-8267-409X
Mike Anderson Corazon-Guivin Laboratorio de Biología y Genética Molecular, Universidad Nacional de San Martín, Jr. Amorarca N° 315, Morales https://orcid.org/0000-0001-6027-4255
Javier Alburquerque Vásquez Facultad de Ciencias. Universidad Nacional de Piura, Urb. Miraflores S/N, Castilla https://orcid.org/0000-0002-2396-9557
Juan Carlos Guerrero-Abad Centro Experimental la Molina, Dirección de Recursos Genéticos y Biotecnología, Instituto Nacional de Innovación Agraria (INIA), Av. La Molina 1981, Lima https://orcid.org/0000-0002-7285-9506
Erick Arellanos Instituto de Investigación para el Desarrollo Sustentable de Ceja de Selva, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco N° 342-350-356, Calle Universitaria N° 304, Chachapoyas https://orcid.org/0000-0003-4665-7262
Jaris Veneros Department of Ecology, Montana State University, P.O. Box 173460, Bozeman, MT 59717 https://orcid.org/0000-0001-6981-4078
Nilton B. Rojas B. Instituto de Investigación para el Desarrollo Sustentable de Ceja de Selva, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco N° 342-350-356, Calle Universitaria N° 304, Chachapoyas https://orcid.org/0000-0002-5352-6140
Segundo Chavez Quintana Instituto de Investigación para el Desarrollo Sustentable de Ceja de Selva, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco N° 342-350-356, Calle Universitaria N° 304, Chachapoyas https://orcid.org/0000-0002-0946-3445
Manuel Oliva Instituto de Investigación para el Desarrollo Sustentable de Ceja de Selva, Universidad Nacional Toribio Rodríguez de Mendoza de Amazonas, Calle Higos Urco N° 342-350-356, Calle Universitaria N° 304, Chachapoyas https://orcid.org/0000-0002-9670-0970

DOI:

https://doi.org/10.17268/sci.agropecu.2021.065

Keywords:

bibliometric analysis, cadmium, Thebroma cacao, co-occurrences, co-citations, historiography

Abstract

The maximum cadmium tolerance standards were established by the European Union in 2014, for the importation of cocoa-based products, causing concern in the countries. Global studies on Theobroma cacao research related to cadmium activity in the atmosphere were analyzed. Bibliometric analyses in R and VOSviewer programs were used to examine 64 documents published in the Scopus database according to keywords. We identified 811 keywords in the co-occurrence of terms, 5 thematic groups in the bibliographic coupling, 20 institutions as most important affiliations, 20 countries of origin of corresponding authors, 112 institutions in co-authorship network of which 5 are in primary documents, and two groups in thematic similarity in co-citation of documents. The United States leads the scientific production with 11 papers, followed by Colombia (8) and Ecuador (7). In 1996, the first scientific article was registered for the network, with increases of up to 11 publications by 2020. In conclusion, the need to strengthen and create more research networks between countries, institutions, authors, and co-authors is evident. It is hoped that the results will allow a comprehensive unraveling of the cadmium-cocoa research trajectory, while at the same time yielding new prospective research.

References

Adeyeye, E. I., Ajibade, P. A., & Temola, A. F. (2005). Metal concentration in cocoa seeds shell ash, liquid effluent, soil sediments and associated plants in a cocoa processing industry in Nigeria. International Journal of Environmental Studies, 62(2), 171–180.

Alcívar-Córdova, K. S., Quezada-Campoverde, J. M., Barrezueta-Unda, S., Garzón-Montealegre, V. J., & Carvaja-Romero, H. (2021). Análisis económico de la exportación del cacao en el Ecuador durante el periodo 2014–2019. Polo del Conocimiento, 6(3), 2430-2444.

Alekseevna Bunich, G., Aleksandrovich Rovenskiy, Y., Tambievna Akhvlediani, J., Yuriev-ich Rusanov, Y., & Alekseevna Bunich, G., et al. (2019). Regional Development Banks: Theory And Practice 1 Bancos Regionales De Desarrollo: Teoría Y Práctica. Especial, 35, 2861–2871.

Angulo-Bazán, Y. (2020). Bibliometric indicators of peruvian scientific output on medicinal plants. Revista Peruana de Medicina Experimental y Salud Pública, 37(3), 495–503.

Araujo-Abad, S., Tapia, W., & Villamarín-Ortiz, A. (2020). Verification of the atomic absorption spectroscopy with graphite furnace analytical method for the quantification of cadmium in cocoa almonds (Theobroma cacao). Granja, 31(1), 59–73.

Arévalo-Gardini, E., Arévalo-Hernández, C. O., Baligar, V. C., & He, Z. L. (2017). Heavy metal accumulation in leaves and beans of cacao (Theobroma cacao L.) in major cacao growing regions in Peru. Science of the Total Environment, 605–606, 792–800.

Argüello, D., Chavez, E., Lauryssen, F., Vanderschueren, R., Smolders, E., & Montalvo, D. (2019). Soil properties and agronomic factors affecting cadmium concentrations in cacao beans: A nationwide survey in Ecuador. Science of the Total Environment, 649, 120–127.

Argüello, D., Montalvo, D., Blommaert, H., Chavez, E., & Smolders, E. (2020). Surface soil liming reduces cadmium uptake in cacao seedlings but subsurface uptake is enhanced. Journal of Environmental Quality, 49(5), 1359–1369.

Aria, M., & Cuccurullo, C. (2017). bibliometrix: An R-tool for comprehensive science mapping analysis. Journal of Informetrics, 11(4), 959–975.

Baas, J., Schotten, M., Plume, A., Côté, G., & Karimi, R. (2020). Scopus as a curated, high-quality bibliometric data source for academic research in quantitative science studies. Quantitative Science Studies, 1(1), 377–386.

Bakkalbasi, N., Bauer, K., Glover, J., & Wang, L. (2006). Three options for citation tracking: Google Scholar, Scopus and Web of Science. Biomedical Digital Libraries, 3.

Bansah, K. J., & Addo, W. K. (2016). Phytoremediation Potential of Plants Grown on Reclaimed Spoil Lands. Ghana Mining Journal, 16(1), 68.

Bar-Ilan, J. (2010). Citations to the “Introduction to informetrics” indexed by WOS, Scopus and Google Scholar. Scientometrics, 82(3), 495–506.

Barraza, F., Schreck, E., Uzu, G., Lévêque, T., Zouiten, C., Boidot, M., & Maurice, L. (2021). Beyond cadmium accumulation: Distribution of other trace elements in soils and cacao beans in Ecuador. Environmental Research, 192, 110241.

Barraza, F., Maurice, L., Uzu, G., Becerra, S., López, F., et al. (2018). Distribution, contents and health risk assessment of metal(loid)s in small-scale farms in the Ecuadorian Amazon: An insight into impacts of oil activities. Science of the Total Environment, 622–623, 106–120.

Batistič, S., Černe, M., & Vogel, B. (2017). Just how multi-level is leadership research? A document co-citation analysis 1980–2013 on leadership constructs and outcomes. The Leadership Quarterly, 28(1), 86–103.

Beintema, N. M., & Echeverría, R. G. (2020). Evolution of cgiar funding. Disponible en: https://ebrary.ifpri.org/digital/collection/p15738coll2/id/134011

Bertoldi, D., Barbero, A., Camin, F., Caligiani, A., & Larcher, R. (2016). Multielemental fingerprinting and geographic traceability of Theobroma cacao beans and cocoa products. Food Control, 65, 46–53.

Boeris, C. E. (2010). Aplicación de métodos bibliométricos a la evaluación de colecciones: El caso de la Biblioteca del Instituto Argentino de Radioastronomía. Tesis presentada para la obtención del grado de Licenciada en Bibliotecología y Ciencia de la Información. Facultad de Humanidades y Ciencias de la Educación. Universidad Nacional de La Plata. Argentina.

Bravo, D., & Benavides-Erazo, J. (2020). The use of a two-dimensional electrical resistivity tomography (2D-ERT) as a technique for cadmium determination in Cacao crop soils. Applied Sciences (Switzerland), 10(12), 4149.

Cañedo, R., Celorrio, I., Coello, D., & Hidalgo, R. (2010). Contribuciones en Pubmed entre 2010 y 2014, de autores afiliados a instituciones de salud de Holguín, Cuba. Correo científico médico de Holguín, 19(2), 385-390.

Casteblanco, J. A. (2018). Heavy metals remediation with potential application in cocoa cultivation. Granja, 27(1), 21–35.

Castro, A. v., de Almeida, A. A. F., Pirovani, C. P., Reis, G. S. M., Almeida, N. M., & Mangabeira, P. A. O. (2015). Morphological, biochemical, molecular and ultrastructural changes induced by Cd toxicity in seedlings of Theobroma cacao L. Ecotoxicology and Environmental Safety, 115, 174–186.

Chen, W., Chang, A. C., & Wu, L. (2007). Assessing long-term environmental risks of trace elements in phosphate fertilizers. Ecotoxicology and Environmental Safety, 67(1), 48–58.

Clemens, S., & Ma, J. F. (2016). Toxic Heavy Metal and Metalloid Accumulation in Crop Plants and Foods. Annual Review of Plant Biology, 67, 489–512.

Corrales-Reyes, I. E. (2017). Coautoría y redes de colaboración científica en Medwave. Medwave, 17(9), e7103.

DalCorso, G., Farinati, S., Maistri, S., & Furini, A. (2008). How plants cope with cadmium: Staking all on metabolism and gene expression. In Journal of Integrative Plant Biology, 50(10), 1268–1280.

de Almeida, A.-A. F., Valle, R. R., Almeida, A.-A. F., & Valle, R. R. (2007). Ecophysiology of the cacao tree. Braz. J. Plant Physiol, 19(4), 425-448.

Donthu, N., Kumar, S., Mukherjee, D., Pandey, N., & Lim, W. M. (2021). How to conduct a bibliometric analysis: An overview and guidelines. Journal of Business Research, 133, 285–296.

dos Santos, M. L. S., de Almeida, A. A. F., da Silva, N. M., Oliveira, B. R. M., Silva, J. V. S., Junior, J. O. S., Ahnert, D., & Baligar, V. C. (2020). Mitigation of cadmium toxicity by zinc in juvenile cacao: Physiological, biochemical, molecular and micromorphological responses. Environmental and Experimental Botany, 179, 104201.

Engbersen, N., Gramlich, A., Lopez, M., Schwarz, G., Hattendorf, B., Gutierrez, O., & Schulin, R. (2019a). Cadmium accumulation and allocation in different cacao cultivars. Science of the Total Environment, 678, 660–670.

Engbersen, N., Gramlich, A., Lopez, M., Schwarz, G., Hattendorf, B., Gutierrez, O., & Schulin, R. (2019b). Cadmium accumulation and allocation in different cacao cultivars. Science of the Total Environment, 678, 660–670.

FAO. (2020). Investment Centre Annual Review 2019. Food Administration Organization (FAO). Italia. 60p.

Febrero-Bande, M., & Oviedo De La Fuente, M. (2012). Statistical Computing in Functional Data Analysis: The R Package fda.usc. In JSS Journal of Statistical Software (Vol. 51). http://www.jstatsoft.org/

Fuglie, K. (2016). The growing role of the private sector in agricultural research and development world-wide. Global Food Security, 10, 29–38.

Galvez, C. (2018). Co-word analysis applied to highly cited papers in Library and Information Science (2007-2017). Transinformacao 30(3), 277–286.

Ganesan, V. (2008). Rhizoremediation of cadmium soil using a cadmium-resistant plant growth-promoting rhizopseudomonad. Current Microbiology, 56(4), 403–407.

García, M. J. M., Moreno-Grau, S., Martínez García, J. J., Moreno, J., Bayo, J., Pérez, J. J. G., & Moreno-Clavel, J. (2001). Distribution of the metals lead, cadmium, copper, and zinc in the top soil of Cartagena, Spain. Water, Air, and Soil Pollution, 131, 329–347.

Garfield, E. (2004). Historiographic mapping of knowledge domains literature. Journal of Information Science, 30(2), 119–145.

Garfield, E., Pudovkin, A. I., & Istomin, V. S. (2003). Why Do We Need Algorithmic Historiography? Journal of the American Society for Information Science and Technology, 54(5), 400-412.

Gramlich, A., Tandy, S., Gauggel, C., López, M., Perla, D., Gonzalez, V., & Schulin, R. (2018). Soil cadmium uptake by cocoa in Honduras. Science of the Total Environment, 612, 370–378.

Hirzel, J., Retamal-Salgado, J., Walter, I., & Matus, I. (2017). Cadmium accumulation and distribution in plants of three durum wheat cultivars under different agricultural environments in Chile. Journal of Soil and Water Conservation, 72(1), 77–88.

Hjørland, B. (2013). Facet analysis: The logical approach to knowledge organization. Information Processing and Management, 49(2), 545–557.

Järup, L., Berglund, M., Elinder, C. G., Nordberg, G., Vahter, M. (1998). Health effects of cadmium exposure--a review of the literature and a risk estimate. Scand J Work Environ Health, 24(Suppl 1), 1-51.

Kataoka, Y., Watanabe, T., Hayashi, K., & Akiyama, H. (2018). Surveillance of Cadmium Concentration in Chocolate and Cocoa Powder Products Distributed in Japan. Food Hygiene and Safety Science, 59(6), 269-274.

Kaya, C., Okant, M., Ugurlar, F., Alyemeni, M. N., Ashraf, M., & Ahmad, P. (2019). Melatonin-mediated nitric oxide improves tolerance to cadmium toxicity by reducing oxidative stress in wheat plants. Chemosphere, 225, 627–638.

Kessler, M. M. (1963). Bibliographic coupling between scientific papers. American documentation, 14(1), 10-25.

Lafargue-Molina, P. (2021). Marker development for the traceability of certified sustainably produced cacao (Theobroma cacao) in the chocolate industry. (Thesis). Faculty of Health and Applied Sciences, Centre for Research in Biosciences. University of the West of England. 225p.

Leung, X. Y., Sun, J., & Bai, B. (2017). Bibliometrics of social media research: A co-citation and co-word analysis. International Journal of Hospitality Management, 66, 35–45.

Lewis, C., Lennon, A. M., Eudoxie, G., Sivapatham, P., & Umaharan, P. (2021). Plant metal concentrations in Theobroma cacao as affected by soil metal availability in different soil types. Chemosphere, 262, 127749.

Lewis, C., Lennon, A. M., Eudoxie, G., & Umaharan, P. (2018). Genetic variation in bioaccumulation and partitioning of cadmium in Theobroma cacao L. Science of the Total Environment, 640–641, 696–703.

Louekari, K., Mäkelä-Kurtto, R., & Jousilahti, P. (2008). Health risks associated with predicted increase of cadmium in cultivated soils and in the diet. Environmental Modeling and Assessment, 13(4), 517–525.

Lugon-Moulin, N., Zhang, M., Gadani, F., Rossi, L., Koller, D., Krauss, M., & Wagner, G. J. (2004). Critical Review of the Scienceand Options for Reducing Cadmium in Tobacco (Nicotiana tabacum L.) and Other Plants. Advances in Agronomy, 83, 111–180.

Maddela, N. R., Kakarla, D., García, L. C., Chakraborty, S., Venkateswarlu, K., & Megharaj, M. (2020). Cocoa-laden cadmium threatens human health and cacao economy: A critical view. Science of the Total Environment, 720, 137645.

Maddi, A. (2020). Measuring open access publications: a novel normalized open access indicator. Scientometrics, 124(1), 379–398.

Martín, S. G., & Lafuente, V. (2017). Referencias bibliográficas: indicadores para su evaluación en trabajos científicos. Investigación bibliotecológica, 31(71), 151-180.

Powis, T. G., Valdez, F., Hester, T. R., Hurst, W. J., & Tarka, S. M. (2002). Spouted vessels and cacao use among the preclassic Maya. Latin American Antiquity, 13(1), 85-106.

Merigó, J. M., Pedrycz, W., Weber, R., & de la Sotta, C. (2018). Fifty years of Information Sciences: A bibliometric overview. Information Sciences, 432, 245–268.

Meunier, N., Laroulandie, J., Blais, J. F., & Tyagi, R. D. (2003). Cocoa shells for heavy metal removal from acidic solutions. Bioresource Technology, 90(3), 255–263.

Molina, R., Ramos Martínez, M. F. (2020). Variables que impiden incrementar las exportaciones de cacao en grano del estado de Tabasco. Revista Cimexus, 15(2), 63-81.

Moore, R. E. T., Ullah, I., de Oliveira, V. H., Hammond, S. J., Strekopytov, S., Tibbett, M., Dunwell, J. M., & Rehkämper, M. (2020). Cadmium isotope fractionation reveals genetic variation in Cd uptake and translocation by Theobroma cacao and role of natural resistance-associated macrophage protein 5 and heavy metal ATPase-family transporters. Horticulture Research, 7(1), 71.

Mounicou, S., Szpunar, J., Andrey, D., Blake, C., & Lobinski, R. (2003). Concentrations and bioavailability of cadmium and lead in cocoa powder and related products. Food Additives and Contaminants, 20(4), 343–352.

Mulet-Forteza, C., Socias Salvá, A., Monserrat, S., & Amores, A. (2020). 80th Anniversary of Pure and Applied Geophysics: A Bibliometric Overview. Pure and Applied Geophysics, 177(2), 531–570.

Nair, K. P. (2021). Tree Crops. Springer International Publishing. 536p.

Nawrot, T., Plusquin, M., Hogervorst, J., Roels, H. A., Celis, H., Thijs, L., ... & Staessen, J. A. (2006). Environmental exposure to cadmium and risk of cancer: a prospective population-based study. The lancet oncology, 7(2), 119-126.

Nawrot, T. S., Staessen, J. A., Roels, H. A., Munters, E., Cuypers, A., Richart, T., Ruttens, A., Smeets, K., Clijsters, H., & Vangronsveld, J. (2010). Cadmium exposure in the population: From health risks to strategies of prevention. BioMetals, 23(5), 769–782.

Nelson, V., & Morton, J. (2020). CGIAR Research Program 2020 Reviews: Climate Change, Agriculture and Food Security. https://cas.cgiar.org/

Nguyen, A. H., Hoying, C. R., Urbina, T. M., & Drennan, P. (2016). Effects of cadmium on growth, short-term photosynthetic acclimation and metal accumulation in radish plants (Raphanus sativus L.). Int. J. Environmental Technology and Management, 20(1/2), 78–86.

Nordberg, G. F. (2009). Historical perspectives on cadmium toxicology. Toxicology and Applied Pharmacology, 238(3), 192–200.

Odoemelam, S. A., Iroh, C. U., & Igwe, J. C. (2011). Copper (II), cadmium (II) and lead (II) adsorption kinetics from aqueous metal solutions using chemically modified and unmodified cocoa pod husk (Theobroma cacao) waste biomass. Research Journal of Applied Sciences, 6(1), 44-52.

Oliveira, B. R. M., de Almeida, A. A. F., Pirovani, C. P., Barroso, J. P., Carlos, C. H., Santos, N. A., Ahnert, D., Baligar, V. C., & Mangabeira, P. A. O. (2020). Mitigation of Cd toxicity by Mn in young plants of cacao, evaluated by the proteomic profiles of leaves and roots. Ecotoxicology, 29(3), 340–358.

Onianwa, P. C., Adetola, I. G., Iwegbue, C. M. A., Ojo, M. F., & Tella, O. O. (1999). Trace heavy metals composition of some Nigerian beverages and food drinks. Food Chemistry, 66(3), 275-279.

Pereira de Araújo, R., Furtado de Almeida, A. A., Silva Pereira, L., Mangabeira, P. A. O., Olimpio Souza, J., Pirovani, C. P., Ahnert, D., & Baligar, V. C. (2017). Photosynthetic, antioxidative, molecular and ultrastructural responses of young cacao plants to Cd toxicity in the soil. Ecotoxicology and Environmental Safety, 144, 148–157.

Pérez, U. A., Gómez, M. R., Serralde, D. P., Peñaranda Rolón, A. M., Wilches Ortiz, W. A., Ramírez, L., & Rengifo Estrada, G. A. (2019). Arbuscular mycorrhizal fungi (AMF) as a strategy to reduce the absorption of cadmium in cocoa (Theobroma cacao) plants. Terra Latinoamericana, 37(2), 121–130.

Pisco, R. R., Jiménez, D. G., & Cruz, D. B. (2018). Cadmium phytoextraction with mulberry grass (Solanum nigrum L.) in soils grown with cocoa (Theobroma cacao L.). Acta Agronómica, 67(3), 420–424.

Ramtahal, G., Umaharan, P., Hanuman, A., Davis, C., & Ali, L. (2019). The effectiveness of soil amendments, biochar and lime, in mitigating cadmium bioaccumulation in Theobroma cacao L. Science of the Total Environment, 693, 133563.

Rascio, N., & Navari-Izzo, F. (2011). Heavy metal hyperaccumulating plants: How and why do they do it? And what makes them so interesting? Plant Science, 180(2), 169–181.

Ravikumar, S., Agrahari, A., & Singh, S. N. (2015). Mapping the intellectual structure of scientometrics: A co-word analysis of the journal scientometrics (2005–2010). Scientometrics, 102(1), 929–955.

Rofner, (2021) N. F. Revisión sobre límites máximos de cadmio en cacao (Theobroma cacao L.). LA GRANJA: Revista de Ciencias de la Vida, 34(2), 117-130.

Romero-Estévez, D., Yánez-Jácome, G. S., Simbaña-Farinango, K., & Navarrete, H. (2019). Content and the relationship between cadmium, nickel, and lead concentrations in Ecuadorian cocoa beans from nine provinces. Food Control, 106, 106750.

Sasaki, A., Yamaji, N., & Ma, J. F. (2014). Overexpression of OsHMA3 enhances Cd tolerance and expression of Zn transporter genes in rice. Journal of Experimental Botany, 65(20), 6013–6021.

Scott, S. R., Smith, K. E., Dahman, C., Gorski, P. R., Adams, S. v., & Shafer, M. M. (2019). Cd isotope fractionation during tobacco combustion produces isotopic variation outside the range measured in dietary sources. Science of the Total Environment, 688, 600–608.

Singh, R., Sibi, P. S., Sharma, P., Tamang, M., & Singh, A. K. (2021). Twenty Years of Journal of Quality Assurance in Hospitality & Tourism: A Bibliometric Assessment. Journal of Quality Assurance in Hospitality and Tourism (In press).

Small, H., Boyack, K. W., & Klavans, R. (2014). Identifying emerging topics in science and technology. Research Policy, 43(8), 1450–1467.

Song, Y., Jin, L., & Wang, X. (2017). Cadmium absorption and transportation pathways in plants. International Journal of Phytoremediation, 19(2), 133–141.

Jiménez, C. S. (2015). Estado legal mundial del cadmio en cacao (Theobroma cacao): fantasía o realidad. Producción + Limpia, 10(1), 89-104.

Tang, Y., Ren, Z., Kong, W., & Jiang, H. (2020). Compiler testing: a systematic literature analysis. Frontiers of Computer Science, 14(1).

ICCO - The International Cocoa Organization (2021). https://www.icco.org/

Ullah, I., Wang, Y., Eide, D. J., & Dunwell, J. M. (2018). Evolution, and functional analysis of Natural Resistance-Associated Macrophage Proteins (NRAMPs) from Theobroma cacao and their role in cadmium accumulation. Scientific Reports, 8(1), 14412.

van Eck, N. J., & Waltman, L. (2014). Visualizing Bibliometric Networks. In Measuring Scholarly Impact (pp. 285–320). Springer International Publishing.

van Raan, A. F. J. (2005). For Your Citations Only? Hot Topics in Bibliometric Analysis. Measurement: Interdisciplinary Research & Perspective, 3(1), 50–62.

Vogel, B., Reichard, R. J., Batistič, S., & Černe, M. (2020). A bibliometric review of the leadership development field: How we got here, where we are, and where we are headed. The Leadership Quarterly, 32(5), 101381.

Wang, Q., & Zhang, F. (2020). Does increasing investment in research and development promote economic growth decoupling from carbon emission growth? An empirical analysis of BRICS countries. Journal of Cleaner Production, 252, 119853.

Wu, X., Chen, X., Zhan, F. B., & Hong, S. (2015). Global research trends in landslides during 1991–2014: a bibliometric analysis. Landslides, 12(6), 1215–1226.

Zarcinas, B. A., Fauziah Ishak, C., Mclaughlin, M. J., & Cozens, G. (2004). Heavy metals in soils and crops in southeast Asia. 1. Peninsular Malaysia. Environmental Geochemistry and Health, 26, 343–357.

Zarrillo, S., Gaikwad, N., Lanaud, C., Powis, T., Viot, C., et al. (2018). The use and domestication of Theobroma cacao during the mid-Holocene in the upper Amazon. Nature Ecology and Evolution, 2(12), 1879–1888.

Zhu, D., Wei, Y., Zhao, Y., Wang, Q., & Han, J. (2018). Heavy Metal Pollution and Ecological Risk Assessment of the Agriculture Soil in Xunyang Mining Area, Shaanxi Province, Northwestern China. Bulletin of Environmental Contamination and Toxicology, 101(2), 178–184.