{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T04:43:00Z","timestamp":1775450580848,"version":"3.50.1"},"reference-count":61,"publisher":"MDPI AG","issue":"7","license":[{"start":{"date-parts":[[2026,4,3]],"date-time":"2026-04-03T00:00:00Z","timestamp":1775174400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001871","name":"FCT\u2014Portugal National Agency","doi-asserted-by":"publisher","award":["UIDB\/04643\/2020"],"award-info":[{"award-number":["UIDB\/04643\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001871","name":"FCT\u2014Funda\u00e7\u00e3o para a Ci\u00eancia e a Tecnologia","doi-asserted-by":"publisher","award":["UIDB\/05037\/2020"],"award-info":[{"award-number":["UIDB\/05037\/2020"]}],"id":[{"id":"10.13039\/501100001871","id-type":"DOI","asserted-by":"publisher"}]},{"award":["UIDB\/05037\/2020"],"award-info":[{"award-number":["UIDB\/05037\/2020"]}],"id":[{"id":"https:\/\/ror.org\/00snfqn58","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sustainability"],"abstract":"<jats:p>Madeira\u2019s agricultural sector is characterised by pronounced structural heterogeneity, land fragmentation, and increasing socio-economic and environmental pressures. However, comprehensive typological and spatial analyses remain limited, particularly in small island contexts. This study addresses this gap by providing a typological and spatial analysis of the agrarian structure in the Autonomous Region of Madeira, Portugal, using 2019 Agricultural Census data. An integrated framework combining Principal Component Analysis (PCA), Partitioning Around Medoids (PAM) clustering, and Random Forest validation\u2014representing a novel approach in agrarian typology studies\u2014is employed to identify three agricultural models: Intensive Subtropical Agriculture (24.1% of parishes), characterised by small holdings and high labour intensity; Extensive Traditional Agriculture (64.8%), featuring moderate farm size and diversified cropping; and Pasture-based Agriculture (11.1%), dominated by larger farms and low labour input. The results confirm significant structural trade-offs, including a strong inverse relationship between farm size and labour intensity (r = \u22120.653) and a negative correlation between specialisation and crop diversity (r = \u22120.673). Spatially, the models exhibit clear territorial differentiation, with subtropical systems concentrated in southern coastal areas and traditional systems prevailing in northern and interior regions. These findings support the hypothesis of a hybrid agrarian transition. Despite relying on cross-sectional data, the results provide a robust basis for targeted and place-based policy design within the Common Agricultural Policy (CAP) framework.<\/jats:p>","DOI":"10.3390\/su18073545","type":"journal-article","created":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T03:11:28Z","timestamp":1775445088000},"page":"3545","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Agrarian Structure in a Small Island Region: A Typological and Spatial Analysis of Agricultural Systems in Madeira Island"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0062-4476","authenticated-orcid":false,"given":"Matheus","family":"Koengkan","sequence":"first","affiliation":[{"name":"The National Institute for Agricultural and Veterinary Research (INIAV), 2780-157 Oeiras, Portugal"},{"name":"University of Coimbra Institute for Legal Research (UCILeR), Faculty of Law, University of Coimbra, 3000-018 Coimbra, Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6937-5420","authenticated-orcid":false,"given":"Jos\u00e9 Alberto","family":"Fuinhas","sequence":"additional","affiliation":[{"name":"Faculty of Economics, Centre for Business and Economics Research (CeBER), University of Coimbra, 3004-531 Coimbra, Portugal"}]},{"given":"Iyabo","family":"Olanrele","sequence":"additional","affiliation":[{"name":"Department of Economics and Business Policy, Nigerian Institute of Social and Economic Research (NISER), Ibadan 200284, Nigeria"}]}],"member":"1968","published-online":{"date-parts":[[2026,4,3]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Connell, J. (2014). Islands at Risk? Environments, Economies and Contemporary Change, Edward Elgar Publishing.","DOI":"10.4337\/9781781003510.00013"},{"key":"ref_2","unstructured":"FAO (2019). Small Island Developing States and Agriculture, Food and Agriculture Organization. Available online: https:\/\/openknowledge.fao.org\/server\/api\/core\/bitstreams\/137c207f-180c-4858-be24-f1d128aefc4d\/content."},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Baldacchino, G. (2018). The Routledge International Handbook of Island Studies: A World of Islands, Routledge.","DOI":"10.4324\/9781315556642"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"183","DOI":"10.1525\/bio.2011.61.3.4","article-title":"Resilience in agriculture through crop diversification: Adaptive management for environmental change","volume":"61","author":"Lin","year":"2011","journal-title":"BioScience"},{"key":"ref_5","doi-asserted-by":"crossref","unstructured":"Barnett, J., and Waters, E. (2016). Rethinking the vulnerability of small island states: Climate change and development in the Pacific Islands. The Palgrave Handbook of International Development, Palgrave Macmillan.","DOI":"10.1057\/978-1-137-42724-3_40"},{"key":"ref_6","first-page":"415","article-title":"Impacts of climate change on the terrestrial ecosystems of Madeira","volume":"4","author":"Cruz","year":"2009","journal-title":"Int. J. Des. Nat. Ecodyn."},{"key":"ref_7","unstructured":"Pinheiro de Carvalho, M.A.A., Ragonezi, C., Oliveira, M.C.O., Reis, F., Macedo, F.L., de Freitas, J.G.R., Nobrega, H., and Gananca, J.F.T. (2022). Agricultural sustainability in Madeira: Historical perspectives and future challenges. Sustainability, 14."},{"key":"ref_8","unstructured":"DREM (2026, March 04). Agricultural Census 2019: Structure of Agricultural Holdings, Available online: https:\/\/estatistica.madeira.gov.pt."},{"key":"ref_9","unstructured":"DREM (2022). Regional Agricultural Statistics 2022, Dire\u00e7\u00e3o Regional de Estat\u00edstica da Madeira."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"3323","DOI":"10.1016\/S1574-0072(09)04065-1","article-title":"Farm size","volume":"Volume 4","author":"Evenson","year":"2010","journal-title":"Handbook of Agricultural Economics"},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"147","DOI":"10.1016\/j.foodpol.2018.03.015","article-title":"New perspectives on farm size and productivity","volume":"84","author":"Rada","year":"2019","journal-title":"Food Policy"},{"key":"ref_12","unstructured":"Ellis, F. (1993). Peasant Economics: Farm Households and Agrarian Development, Cambridge University Press. [2nd ed.]."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"20150202","DOI":"10.1098\/rsta.2015.0202","article-title":"Principal component analysis: A review and recent developments","volume":"374","author":"Jolliffe","year":"2016","journal-title":"Philos. Trans. R. Soc. A"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Kaufman, L., and Rousseeuw, P.J. (1990). Finding Groups in Data: An Introduction to Cluster Analysis, Wiley.","DOI":"10.1002\/9780470316801"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1023\/A:1010933404324","article-title":"Random forests","volume":"45","author":"Breiman","year":"2001","journal-title":"Mach. Learn."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"391","DOI":"10.1111\/1467-9523.00156","article-title":"Rural development: From practices and policies towards theory","volume":"40","author":"Renting","year":"2000","journal-title":"Sociol. Rural."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Demetriou, D. (2013). The Development of an Integrated Planning and Decision Support System (IPDSS) for Land Consolidation, Springer.","DOI":"10.1007\/978-3-319-02347-2"},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"465","DOI":"10.24043\/isj.362","article-title":"Greenland and the Pacific Islands: An improbable conjunction of development trajectories","volume":"11","author":"Connell","year":"2016","journal-title":"Isl. Stud. J."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1227","DOI":"10.1007\/s12571-022-01281-0","article-title":"Perspectives on strengthening local food systems in Small Island Developing States","volume":"14","author":"Guell","year":"2022","journal-title":"Food Secur."},{"key":"ref_20","doi-asserted-by":"crossref","unstructured":"Gin\u00e9sy, M., and Biasi, R. (2025). New Insights into Agriculture on Small Mediterranean Islands: A Systematic Review. Land, 14.","DOI":"10.3390\/land14091874"},{"key":"ref_21","unstructured":"DREM (2024). Statistical Yearbook of the Autonomous Region of Madeira 2023, Dire\u00e7\u00e3o Regional de Estat\u00edstica da Madeira."},{"key":"ref_22","unstructured":"Lantz, B. (2015). Machine Learning with R, Packt Publishing. [2nd ed.]."},{"key":"ref_23","unstructured":"Magurran, A.E. (2004). Measuring Biological Diversity, Blackwell Publishing."},{"key":"ref_24","unstructured":"Jolliffe, I.T. (2002). Principal Component Analysis, Springer. [2nd ed.]."},{"key":"ref_25","unstructured":"Wickham, H., Fran\u00e7ois, R., Henry, L., and M\u00fcller, K. (2026, March 04). dplyr. Available online: https:\/\/CRAN.R-project.org\/package=dplyr."},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"240","DOI":"10.1098\/rspl.1895.0041","article-title":"Notes on regression and inheritance in the case of two parents","volume":"58","author":"Pearson","year":"1895","journal-title":"Proc. R. Soc. Lond."},{"key":"ref_27","first-page":"281","article-title":"Some methods for classification and analysis of multivariate observations","volume":"Volume 1","author":"MacQueen","year":"1967","journal-title":"Proceedings of the Fifth Berkeley Symposium on Mathematical Statistics and Probability"},{"key":"ref_28","first-page":"1","article-title":"FactoMineR: An R package for multivariate analysis","volume":"25","author":"Josse","year":"2008","journal-title":"J. Stat. Softw."},{"key":"ref_29","unstructured":"Wei, T., and Simko, V. (2026, March 04). R package \u2018corrplot\u2019: Visualization of a Correlation Matrix. Available online: https:\/\/github.com\/taiyun\/corrplot."},{"key":"ref_30","unstructured":"Field, A. (2013). Discovering Statistics Using IBM SPSS Statistics, Sage. [4th ed.]."},{"key":"ref_31","doi-asserted-by":"crossref","first-page":"353","DOI":"10.1016\/j.jenvman.2006.04.021","article-title":"Farm management indicators and farm typologies as a basis for assessments in a changing policy environment","volume":"82","author":"Andersen","year":"2007","journal-title":"J. Environ. Manag."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"141","DOI":"10.1177\/001316446002000116","article-title":"The application of electronic computers to factor analysis","volume":"20","author":"Kaiser","year":"1960","journal-title":"Educ. Psychol. Meas."},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"245","DOI":"10.1207\/s15327906mbr0102_10","article-title":"The scree test for the number of factors","volume":"1","author":"Cattell","year":"1966","journal-title":"Multivar. Behav. Res."},{"key":"ref_34","doi-asserted-by":"crossref","first-page":"33","DOI":"10.1016\/0308-521X(77)90015-4","article-title":"Agricultural typology: Concept and method","volume":"2","author":"Kostrowicki","year":"1977","journal-title":"Agric. Syst."},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"53","DOI":"10.1016\/0377-0427(87)90125-7","article-title":"Silhouettes: A graphical aid to the interpretation and validation of cluster analysis","volume":"20","author":"Rousseeuw","year":"1987","journal-title":"J. Comput. Appl. Math."},{"key":"ref_36","doi-asserted-by":"crossref","first-page":"95","DOI":"10.1080\/01969727408546059","article-title":"Well-separated clusters and optimal fuzzy partitions","volume":"4","author":"Dunn","year":"1974","journal-title":"J. Cybern."},{"key":"ref_37","doi-asserted-by":"crossref","first-page":"3201","DOI":"10.1093\/bioinformatics\/bti517","article-title":"Computational cluster validation in post-genomic data analysis","volume":"21","author":"Handl","year":"2005","journal-title":"Bioinformatics"},{"key":"ref_38","doi-asserted-by":"crossref","first-page":"193","DOI":"10.1007\/BF01908075","article-title":"Comparing partitions","volume":"2","author":"Hubert","year":"1985","journal-title":"J. Classif."},{"key":"ref_39","doi-asserted-by":"crossref","first-page":"583","DOI":"10.1080\/01621459.1952.10483441","article-title":"Use of ranks in one-criterion variance analysis","volume":"47","author":"Kruskal","year":"1952","journal-title":"J. Am. Stat. Assoc."},{"key":"ref_40","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v061.i06","article-title":"NbClust: An R package for determining the relevant number of clusters in a data set","volume":"61","author":"Charrad","year":"2014","journal-title":"J. Stat. Softw."},{"key":"ref_41","doi-asserted-by":"crossref","first-page":"24","DOI":"10.1016\/j.isprsjprs.2016.01.011","article-title":"Random forest in remote sensing: A review","volume":"114","author":"Belgiu","year":"2016","journal-title":"ISPRS J. Photogramm. Remote Sens."},{"key":"ref_42","first-page":"18","article-title":"Classification and regression by randomForest","volume":"2","author":"Liaw","year":"2002","journal-title":"R News"},{"key":"ref_43","doi-asserted-by":"crossref","first-page":"1","DOI":"10.18637\/jss.v028.i05","article-title":"Building predictive models in R using the caret package","volume":"28","author":"Kuhn","year":"2008","journal-title":"J. Stat. Softw."},{"key":"ref_44","doi-asserted-by":"crossref","unstructured":"Wickham, H. (2016). ggplot2: Elegant Graphics for Data Analysis, Springer.","DOI":"10.1007\/978-3-319-24277-4_9"},{"key":"ref_45","doi-asserted-by":"crossref","unstructured":"Liu, Y., Li, Z., Xiong, H., Gao, X., and Wu, J. (2010). Understanding of internal clustering validation measures. Proceedings of the 2010 IEEE International Conference on Data Mining, IEEE.","DOI":"10.1109\/ICDM.2010.35"},{"key":"ref_46","doi-asserted-by":"crossref","first-page":"641","DOI":"10.1038\/nmeth.4346","article-title":"Principal component analysis","volume":"14","author":"Lever","year":"2017","journal-title":"Nat. Methods"},{"key":"ref_47","doi-asserted-by":"crossref","first-page":"111","DOI":"10.1016\/j.ecolecon.2016.01.001","article-title":"Economic and ecological trade-offs of agricultural specialization at different spatial scales","volume":"122","author":"Klasen","year":"2016","journal-title":"Ecol. Econ."},{"key":"ref_48","doi-asserted-by":"crossref","first-page":"e36","DOI":"10.1017\/S1742170523000303","article-title":"Water footprint of representative agricultural crops on volcanic is-lands: The case of the Canary Islands","volume":"38","author":"Santamarta","year":"2023","journal-title":"Renew. Agric. Food Syst."},{"key":"ref_49","doi-asserted-by":"crossref","unstructured":"Fischetti, E., Beni, C., Santangelo, E., and Bascietto, M. (2025). Agroecology and precision agriculture as combined approaches to increase field-scale crop resilience and sustainability. Sustainability, 17.","DOI":"10.3390\/su17030961"},{"key":"ref_50","doi-asserted-by":"crossref","unstructured":"Dinis, I. (2019). The concept of family farming in the Portuguese political discourse. Soc. Sci., 8.","DOI":"10.3390\/socsci8070213"},{"key":"ref_51","doi-asserted-by":"crossref","unstructured":"Houssni, M., Kassout, J., El Mahroussi, M., Chakkour, S., Kadiri, M., Ater, M., and Petrisor, A.I. (2023). Evaluation and structuring of agrodiversity in oases agroecosystems of Southern Morocco. Agriculture, 13.","DOI":"10.3390\/agriculture13071413"},{"key":"ref_52","unstructured":"Batista, D. (2026, March 04). The Multi-Functionality and Resilience of the Mediterranean Landscape: Traditional Vegetable Gardens in Southern Portugal and Northern Morocco. Available online: http:\/\/hdl.handle.net\/10174\/14013."},{"key":"ref_53","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1016\/j.jrurstud.2017.03.006","article-title":"Crisis and rural resilience in Greece","volume":"52","author":"Anthopoulou","year":"2017","journal-title":"J. Rural Stud."},{"key":"ref_54","doi-asserted-by":"crossref","unstructured":"Hidalgo, P.J., Hern\u00e1ndez, H., S\u00e1nchez-Almendro, A.J., L\u00f3pez-Tirado, J., Vessella, F., and Porras, R. (2021). Fragmentation and connectivity of island forests in agricultural Mediterranean environments. Forests, 12.","DOI":"10.3390\/f12091201"},{"key":"ref_55","doi-asserted-by":"crossref","unstructured":"Troiano, C., Buglione, M., Petrelli, S., Belardinelli, S., De Natale, A., Svenning, J.-C., and Fulgione, D. (2021). Traditional free-ranging livestock farming and landscape preservation. Land, 10.","DOI":"10.3390\/land10090957"},{"key":"ref_56","first-page":"40","article-title":"The dairy sector in the Azores Islands: Possibilities and main constraints towards increased added value","volume":"53","author":"Alvarenga","year":"2020","journal-title":"Trop. Anim. Health Prod."},{"key":"ref_57","doi-asserted-by":"crossref","unstructured":"Morais, T.G., Teixeira, R.F.M., Rodrigues, N.R., and Domingos, T. (2018). Carbon footprint of milk from pasture-based dairy farms in Azores, Portugal. Sustainability, 10.","DOI":"10.3390\/su10103658"},{"key":"ref_58","unstructured":"European Commission (2025). EU Agricultural Outlook 2024\u20132035, Publications Office of the Eropean Union."},{"key":"ref_59","unstructured":"Eurostat (2026, March 04). Agri-Environmental Indicator\u2014Specialisation. Available online: https:\/\/ec.europa.eu\/eurostat\/statistics-explained."},{"key":"ref_60","doi-asserted-by":"crossref","unstructured":"Ortiz-Miranda, D., Moragues-Faus, A., and Arnalte-Alegre, E. (2013). Agriculture in Mediterranean Europe: Between Old and New Paradigms, Emerald. Available online: https:\/\/orca.cardiff.ac.uk\/id\/eprint\/52908.","DOI":"10.1108\/S1057-1922(2013)19"},{"key":"ref_61","doi-asserted-by":"crossref","unstructured":"Arora, A., Bela\u00efd, F., and Lechtenberg-Kasten, S. (2024). Resilience of small islands: Unveiling nature-based solutions for sustainable futures. Climate-Resilient Cities, Springer.","DOI":"10.1007\/978-3-031-73090-0"}],"container-title":["Sustainability"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2071-1050\/18\/7\/3545\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T03:21:21Z","timestamp":1775445681000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2071-1050\/18\/7\/3545"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,4,3]]},"references-count":61,"journal-issue":{"issue":"7","published-online":{"date-parts":[[2026,4]]}},"alternative-id":["su18073545"],"URL":"https:\/\/doi.org\/10.3390\/su18073545","relation":{},"ISSN":["2071-1050"],"issn-type":[{"value":"2071-1050","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,4,3]]}}}