Global change in microcosms: Environmental and societal predictors of land cover change on the Atlantic Ocean Islands


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Norder, Sietze J. and Lima, R. F. de and Nascimento, Lea de and Lim, Jun Y. and Fernández Palacios, José María and Romeiras, María M. and Bento Elias, Rui and Cabezas Fuentes, Francisco José and Catarino, Luís and Ceriaco, Luis M.P. and Castilla-Beltrán, Álvaro and Gabriel, Rosalina and Menezes de Sequeira, Miguel and Rijsdijk, Kenneth F. and Nogué, Sandra and Kissling, W. Daniel and Van Loon, E. Emiel and Hall, Marcus and Matos, Margarida and Borges, Paulo A. V, (2020) Global change in microcosms: Environmental and societal predictors of land cover change on the Atlantic Ocean Islands. Anthropocene, 30 (100242). pp. 1-9. ISSN 2213-3054

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Islands contribute enormouslytoglobalbiodiversity,buttheir speciesandecosystems arehighly threatened and often confined to small patches of remaining native vegetation. Islands are thus ideal microcosms to study the local dimensions of global change. While human activities have drastically transformed most islands,the extentto which societal and environmental conditions shape differences in land cover remains unclear. This study analyses the role of contrasting environmental and societal conditions in affecting the extent of native vegetation cover on 30 islands in five Atlantic Ocean archipelagos (Azores, Madeira, Canary Islands, Cape Verde, Gulf of Guinea Islands). We adopt a mixed-method approach in which we combine a statistical analysis of environmental and societal variables with a qualitative reconstruction of historical socioeconomic trends. Statistical results indicate that terrain ruggedness predominantly shapes the extent of remainingnativevegetationcover, suggestingthattopography constrainshuman impactsonbiodiversity. Overall, environmental variables better explain differences in native vegetation cover between islands than societal variables like human population density. However, throughout history, islands experienced large changes in demography and socioeconomic trends, and therefore modern patterns of native vegetation might also partly reflect these past conditions. While anthropocene narratives often present humans as a global geophysicalforce,the results show thatlocal environmental context strongly mitigated the degree of human impact on biodiversity. These findings call for integrative approaches to understand the contributions of local human-environment interactions to ongoing global change.

Item Type:Article
Uncontrolled Keywords:Global biodiversity change; Social-ecological systems; Macaronesian Islands; Topographic ruggedness; Deforestation; Qualitative-quantitative mixed-methods
Subjects:Medical sciences > Biology > Ecology
ID Code:61666
Deposited On:29 Jul 2020 09:38
Last Modified:29 Jul 2020 11:39

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