Global implications of crop-based bioenergy with carbon capture and storage for terrestrial vertebrate biodiversity.

Autor: Hanssen SV; Department of Environmental Science Radboud Institute for Biological and Environmental Sciences Radboud University Nijmegen The Netherlands., Steinmann ZJN; Department of Environmental Science Radboud Institute for Biological and Environmental Sciences Radboud University Nijmegen The Netherlands.; Environmental Systems Analysis Group Wageningen University & Research Wageningen The Netherlands., Daioglou V; PBL Netherlands Environmental Assessment Agency The Hague The Netherlands.; Copernicus Institute of Sustainable Development Utrecht University Utrecht The Netherlands., Čengić M; Department of Environmental Science Radboud Institute for Biological and Environmental Sciences Radboud University Nijmegen The Netherlands., Van Vuuren DP; PBL Netherlands Environmental Assessment Agency The Hague The Netherlands.; Copernicus Institute of Sustainable Development Utrecht University Utrecht The Netherlands., Huijbregts MAJ; Department of Environmental Science Radboud Institute for Biological and Environmental Sciences Radboud University Nijmegen The Netherlands.
Jazyk: angličtina
Zdroj: Global change biology. Bioenergy [Glob Change Biol Bioenergy] 2022 Mar; Vol. 14 (3), pp. 307-321. Date of Electronic Publication: 2021 Dec 20.
DOI: 10.1111/gcbb.12911
Abstrakt: Bioenergy with carbon capture and storage (BECCS) based on purpose-grown lignocellulosic crops can provide negative CO 2 emissions to mitigate climate change, but its land requirements present a threat to biodiversity. Here, we analyse the implications of crop-based BECCS for global terrestrial vertebrate species richness, considering both the land-use change (LUC) required for BECCS and the climate change prevented by BECCS. LUC impacts are determined using global-equivalent, species-area relationship-based loss factors. We find that sequestering 0.5-5 Gtonne of CO 2 per year with lignocellulosic crop-based BECCS would require hundreds of Mha of land, and commit tens of terrestrial vertebrate species to extinction. Species loss per unit of negative emissions decreases with: (i) longer lifetimes of BECCS systems, (ii) less overall deployment of crop-based BECCS and (iii) optimal land allocation, that is prioritizing locations with the lowest species loss per negative emission potential, rather than minimizing overall land use or prioritizing locations with the lowest biodiversity. The consequences of prevented climate change for biodiversity are based on existing climate response relationships. Our tentative comparison shows that for crop-based BECCS considered over 30 years, LUC impacts on vertebrate species richness may outweigh the positive effects of prevented climate change. Conversely, for BECCS considered over 80 years, the positive effects of climate change mitigation on biodiversity may outweigh the negative effects of LUC. However, both effects and their interaction are highly uncertain and require further understanding, along with the analysis of additional species groups and biodiversity metrics. We conclude that factoring in biodiversity means lignocellulosic crop-based BECCS should be used early to achieve the required mitigation over longer time periods, on optimal biomass cultivation locations, and most importantly, as little as possible where conversion of natural land is involved, looking instead to sustainably grown or residual biomass-based feedstocks and alternative strategies for carbon dioxide removal.
Competing Interests: The authors declare no conflict of interest.
(© 2021 The Authors. GCB Bioenergy published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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