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Title

Depopulation impacts on ecosystem services in Mediterranean rural areas

AuthorsBruno, Daniel; Sorando, Ricardo CSIC ORCID ; Álvarez-Farizo, Begoña; Castellano, Clara; Céspedes, Vanessa; Gallardo, Belinda CSIC ORCID ; Jiménez, Juan J. CSIC ORCID ; López Sánchez, María Victoria CSIC ORCID ; López-Flores. Rocío; Moret-Fernández, David CSIC ORCID ; Navarro, Enrique CSIC ; Picazo, Félix; Sevilla-Callejo, Miguel CSIC ; Tormo, Jaume; Vidal-Macua, Juan José; Nicolau, J. M.; Comín, Francisco A. CSIC ORCID
KeywordsRural abandonment
Land-use change
Agricultural intensification
Rewilding
Environmental management
Demographic changes
Issue DateDec-2021
PublisherElsevier
CitationBruno D... [et al.] Depopulation impacts on ecosystem services in Mediterranean rural areas. Ecosystem Services 52: 101369 (2021)
AbstractDespite the exponential increase in human population at global scale, some rural areas have experienced a progressive abandonment over the last decades. Under particular socioecological and policy contexts, changes in demography may promote land-use changes and, consequently, alter ecosystem services (ES) supply. However, most studies on this topic have targeted urban population increase, whereas depopulation has been rarely addressed. Here, we examined how shifts in demographic variables (human population, population density, and number of villages) affect provisioning (water supply, food and biomass production) and regulating (soil retention, water and nutrient regulation) ES in Mediterranean rural areas with contrasting environmental, socioeconomic and land-use contexts. When depopulation results in underuse of socio-ecological systems, we expected a decrease of provisioning and an increase of regulating ES, whereas we expected the opposite pattern when it results in land-use intensification. To test this hypothesis, we compared demographic data and ES estimated with Soil and Water Assessment Tool (SWAT) linked to land-use changes between the 1950s and 2000s in three rural areas of Aragón (NE Spain). Generalized Additive Mixed Models and Linear Mixed-Effect Models were used to analyze demographic trends, ES changes and the relationship between them. We found severe depopulation (−42% inhabitants) and associated land-use changes in the three areas, which was particularly evident in isolated mountainous zones (−63% inhabitants). Depopulation trends significantly affected land use and, consequently, all of the ES evaluated. In mountainous depopulated areas, land abandonment and rewilding resulted in the increase in water regulation (>1000%) and soil retention (>400%). In contrast, agriculture was intensified in more fertile and easy-to-access lowland areas, boosting the food production service (>600%). Accordingly, the interactions among depopulation, crop production and regulating ES should be considered in the management schemes and policies targeting rural areas for a balanced and sustainable supply of ES in the long term.
Description11 Pags.- 6 Figs.- 4 Tabls. © 2021 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license.
Publisher version (URL)https://doi.org/10.1016/j.ecoser.2021.101369
URIhttp://hdl.handle.net/10261/255048
DOI10.1016/j.ecoser.2021.101369
ISSN2212-0416
Appears in Collections:(EEAD) Artículos
(IPE) Artículos
(CIDE) Artículos

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