Effect factors for terrestrial acidification in Brazil

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    Abstract

    To support the increased use of existing Life Cycle Impact Assessment (LCIA) methodologies across the world, new methodological elements have been developed towards spatially resolved impact assessment.
    Spatially resolved methods could better capture the differences of regional envir
    onmental conditions, which is an essential approach considering countries like Brazil, with high biodiversity. Previous studies have assessed the impacts of terrestrial acidification from the estimations of the potential losses of vascular plants species richness as a result of exposure to acidifying substances for 13 biomes, with 2409 species addressed for whole world. In this context this work aims to provide spatially-differentiated effect factors (EF)
    for terrestrial acidification in Brazil and support the development of spatially-differentiated characterization factors for Brazil. In order to maintain compatibility with existing LCIA methods the effect factors were
    developed using the framework adopted by LC-Impact and Impact World+ methods. Soil pH was used as an indicator of soil acidity to predict plant occurrences. From the number of plant species occuring at each 0.1 pH unit response relationships of species richness and soil pH were developed. The species richness in each ecoregion were transformed into an empirical potentially not occurring fraction, which is a zero-to-one measure used to represent the presence or absence of species. The set of data consists of 976345 records of plants occurrences in Brazil, represented by 33167 species, indicating that this is a comprehensive study. Maps of soil pH in Brazil were extracted at 1-km resolution and pH values were extracted for the depth range
    of 0-30cm. For each ecoregion, species richness was plotted against soil pH and the exposure-response curves for acidification described the behavior of plant species in a certain region when it is exposed to
    acidic conditions. From these curves it was possible to derive the effect factors for terrestrial acidification. The results of this work show that spatial differentiation is meaningful when it is possible to combine fine
    spatial resolutions and highly representative data and this approach can be applied for other impact categories and regions, and contribute to the development of spatial differentiated LCIA methodologies.
    Original languageEnglish
    Publication date2016
    Publication statusPublished - 2016
    EventSETAC Europe 26th Annual Meeting: Environmental contaminants from land to sea: continuities and interface in environmental toxicology and chemistry - La Cite Nantes Congress Center, Nantes, France
    Duration: 22 May 201626 May 2016
    Conference number: 22
    http://nantes.setac.eu/nantes/home//?contentid=851

    Conference

    ConferenceSETAC Europe 26th Annual Meeting
    Number22
    LocationLa Cite Nantes Congress Center
    CountryFrance
    CityNantes
    Period22/05/201626/05/2016
    Internet address

    Cite this

    Crespo Mendes, N., Laurent, A., & Hauschild, M. Z. (2016). Effect factors for terrestrial acidification in Brazil. Abstract from SETAC Europe 26th Annual Meeting, Nantes, France.