Lucas Araujo Carvalho

Regional integration and local change: road paving, community connectivity, and social–ecological resilience in a tri-national frontier, southwestern Amazonia

Initiatives for global economic integration increasingly prioritize new infrastructure in relatively remote regions. Such regions have relatively intact ecosystems and provide valuable ecosystem services, which has stimulated debates over the wisdom of new infrastructure. Most prior research on infrastructure impacts highlights economic benefits, ecological damage, or social conflicts. We suggest a more integrative approach to regional integration by appropriating the concepts of connectivity from transport geography and social–ecological resilience from systems ecology. Connectivity offers a means of observing the degree of integration between locations, and social–ecological resilience provides a framework to simultaneously consider multiple consequences of regional integration. Together, they offer a spatial analysis of resilience that considers multiple dimensions of infrastructure impacts. Our study case is the southwestern Amazon, a highly biodiverse region which is experiencing integration via paving of the Inter-Oceanic Highway. Specifically, we focus on the “MAP” region, a tri-national frontier where Bolivia, Brazil, and Peru meet and which differs in the extent of highway paving. We draw on a tri-national survey of more than 100 resource-dependent rural communities across the MAP frontier and employ indicators for multiple dimensions of connectivity and social–ecological resilience. We pursue a comparative analysis among regions and subregions with differing degrees of community connectivity to markets in order to evaluate their social–ecological resilience. The findings indicate that connectivity and resilience have a multifaceted relationship, such that greater community connectivity corresponds to greater resilience in some respects but not others. We conclude by noting how our findings integrate those from heretofore largely disparate literatures on infrastructure. The integration of transport geography with resilience thought thus stands to advance the study of infrastructure impacts.

Trans-boundary infrastructure, access connectivity, and household land use in a tri-national frontier in the Southwestern Amazon

The land science literature has consistently documented the importance of infrastructure for land use. Less attention has gone to land use around national borders receiving trans-boundary infrastructure upgrades for cross-border integration. We take up the case of the Inter-Oceanic Highway, a trans-boundary road being paved in the tri-national ‘MAP’ frontier of the southwestern Amazon. We draw on a tri-national survey of households in rural communities across the MAP frontier to evaluate the effects of access connectivity on land use. At the time of fieldwork, paving was complete in Acre/Brazil, underway in Madre de Dios/Peru, and planned in Pando/Bolivia. This permits a tri-national comparative analysis. The results confirm different effects of access connectivity on land use by paving status; further, they also document cross-border processes stemming from trans-boundary infrastructure that affect land use. The findings call for more attention to the impacts of regional integration initiatives on landscapes.

Tenure diversity and dependent causation in the effects of regional integration on land use: evaluating the evolutionary theory of land rights in Acre, Brazil

ABSTRACT In the complex causation behind land change, dependent causation can play a central role. A case in point concerns land tenure diversity, where contrasting use rules for different lands may affect the impacts of other drivers on land use outcomes. We therefore evaluate the evolutionary theory of land rights (ETLR), which assumes homogeneous private property rights, in order to test for dependent causation due to distinct use rules among various types of private lands. In the present analysis, we focus on whether land tenure type modifies the effects of highway infrastructure on key outcomes highlighted in the ETLR framework. We take up the case of rural settlements along the Inter-Oceanic Highway in the eastern part of the Brazilian state of Acre, where there is considerable land tenure diversity. Findings from multivariate models for land titling, the castanha nut harvest, and cattle pasture all indicate that the effects of infrastructure depend on land tenure type. These results confirm the importance of dependent causation behind land use and bear implications for theory on land change, infrastructure impacts, and land system science.