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  • Cerrado  (1)
  • land use model  (1)
  • 1
    Publication Date: 2023-01-20
    Description: Socio‐economic scenarios such as the Shared Socioeconomic Pathways (SSPs) have been widely used to analyze global change impacts, but representing their diversity is a challenge for the analytical tools applied to them. Taking Great Britain as an example, we represent a set of stakeholder‐elaborated UK‐SSP scenarios, linked to climate change scenarios (Representative Concentration Pathways), in a globally‐embedded agent‐based modeling framework. We find that distinct model components are required to account for divergent behavioral, social and societal conditions in the SSPs, and that these have dramatic impacts on land system outcomes. From strong social networks and environmental sustainability in SSP1 to land consolidation and technological intensification in SSP5, scenario‐specific model designs vary widely from one another and from present‐day conditions. Changes in social and human capitals reflecting social cohesion, equality, health and education can generate impacts larger than those of technological and economic change, and comparable to those of modeled climate change. We develop an open‐access, transferrable model framework and provide UK‐SSP projections to 2080 at 1 km2 resolution, revealing large differences in land management intensities, provision of a range of ecosystem services, and the knowledge and motivations underlying land manager decision‐making. These differences suggest the existence of large but underappreciated areas of scenario space, within which novel options for land system sustainability could occur.
    Description: Key Points: A national‐scale agent‐based model is developed to represent paired climatic and socio‐economic scenarios in the land system. Key scenario characteristics relate to forms of human behavior, interactions and societal preferences. Large differences emerge between scenarios in terms of land management intensities, ecosystem service provision and land sparing.
    Description: Helmholtz Association http://dx.doi.org/10.13039/501100009318
    Description: Natural Environment Research Council http://dx.doi.org/10.13039/501100000270
    Description: Climate Resilience Programme
    Description: Forestry Commission UK Forestry Commission http://dx.doi.org/10.13039/100017497
    Description: UKRI, Engineering and Physical Sciences Research Council http://dx.doi.org/10.13039/501100000266
    Description: Global Food Security Programme
    Description: DAAD, German Academic Exchange Service London http://dx.doi.org/10.13039/501100001654
    Description: Government of the United Kingdom http://dx.doi.org/10.13039/100013986
    Description: Deutscher Akademischer Austauschdienst http://dx.doi.org/10.13039/501100001655
    Description: Bundesministerium für Bildung und Forschung http://dx.doi.org/10.13039/501100002347
    Description: Karlsruhe Institute of Technology http://dx.doi.org/10.13039/100009133
    Description: Leibniz‐Gemeinschaft http://dx.doi.org/10.13039/501100001664
    Description: https://landchange.earth/CRAFTY
    Description: https://doi.org/10.17605/OSF.IO/CY8WE
    Keywords: ddc:333.7 ; land use change ; land use model ; scenario analysis ; socio‐economic scenario ; model evaluation ; TRACE
    Language: English
    Type: doc-type:article
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  • 2
    ISSN: 1432-1939
    Keywords: Key words Savanna ; Cerrado ; Fire ; Elevated CO2 ; Carbohydrate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  The savannas (cerrado) of south-central Brazil are currently subjected to frequent anthropogenic burning, causing widespread reduction in tree density. Increasing concentrations of atmospheric CO2 could reduce the impact of such frequent burning by increasing the availability of nonstructural carbohydrate, which is necessary for resprouting. We tested the hypotheses that elevated CO2 stimulates resprouting and accelerates replenishment of carbohydrate reserves. Using a factorial experiment, seedlings of a common Brazilian savanna tree, Keilmeyera coriacea, were grown at 350 ppm and 700 ppm CO2 and at two nutrient levels. To simulate burning, the plants were either clipped at 15 weeks or were left unclipped. Among unclipped plants, CO2 and nutrients both stimulated growth, with no significant interaction between nutrient and CO2 effects. Among clipped plants, both CO2 and nutrients stimulated resprouting. However, there was a strong interaction between CO2 and nutrient effects, with CO2 having a significant effect only in the presence of high nutrient availability. Under elevated CO2, carbohydrate reserves remained at higher levels following clipping. Root total nonstructural carbohydrate remained above 36% in all treatments, so carbohydrate reserves did not limit regrowth. These results indicate that under elevated CO2 this species may be better able to endure the high frequency of anthropogenic burning in the Brazilian savannas.
    Type of Medium: Electronic Resource
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