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Your search keyword '"Sakschewski, B."' showing total 2 results
Start Over Author "Sakschewski, B." Publisher elsevier
2 results on '"Sakschewski, B."'

1. Achieving a nature- and people-positive future

Author

Obura, D. O. DeClerck, F. Verburg, P. H. Gupta, J. Abrams, J. F. Bai, X. Bunn, S. Ebi, K. L. Gifford, L. Gordon, C. Jacobson, L. Lenton, T. M. Liverman, D. Mohamed, A. Prodani, K. Rocha, J. C. Rockström, J. Sakschewski, B. Stewart-Koster, B. van Vuuren, D. Winkelmann, R. Zimm, C. and Obura, D. O. DeClerck, F. Verburg, P. H. Gupta, J. Abrams, J. F. Bai, X. Bunn, S. Ebi, K. L. Gifford, L. Gordon, C. Jacobson, L. Lenton, T. M. Liverman, D. Mohamed, A. Prodani, K. Rocha, J. C. Rockström, J. Sakschewski, B. Stewart-Koster, B. van Vuuren, D. Winkelmann, R. Zimm, C.

Abstract

Despite decades of increasing investment in conservation, we have not succeeded in “bending the curve” of biodiversity decline. Efforts to meet new targets and goals for the next three decades risk repeating this outcome due to three factors: neglect of increasing drivers of decline; unrealistic expectations and time frames of biodiversity recovery; and insufficient attention to justice within and between generations and across countries. Our Earth system justice approach identifies six sets of actions that when tackled simultaneously address these failings: (1) reduce and reverse direct and indirect drivers causing decline; (2) halt and reverse biodiversity loss; (3) restore and regenerate biodiversity to a safe state; (4) raise minimum wellbeing for all; (5) eliminate over-consumption and excesses associated with accumulation of capital; and (6) uphold and respect the rights and responsibilities of all communities, present and future. Current conservation campaigns primarily address actions 2 and 3, with urgent upscaling of actions 1, 4, 5, and 6 needed to help deliver the post-2020 global biodiversity framework.

Published
2023
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2. Rainfall seasonality dominates critical precipitation threshold for the Amazon forest in the LPJmL vegetation model.

Author

Nian D, Bathiany S, Sakschewski B, Drüke M, Blaschke L, Ben-Yami M, von Bloh W, and Boers N

Subjects
Biomass, Trees, Brazil, Models, Theoretical, Conservation of Natural Resources, Rain, Seasons, Climate Change, Rainforest
Abstract

Understanding the Amazon Rainforest's response to shifts in precipitation is paramount with regard to its sensitivity to climate change and deforestation. Studies using Dynamic Global Vegetation Models (DGVMs) typically only explore a range of socio-economically plausible pathways. In this study, we applied the state-of-the-art DGVM LPJmL to simulate the Amazon forest's response under idealized scenarios where precipitation is linearly decreased and subsequently increased between current levels and zero. Our results indicate a nonlinear but reversible relationship between vegetation Above Ground Biomass (AGB) and Mean Annual Precipitation (MAP), suggesting a threshold at a critical MAP value, below which vegetation biomass decline accelerates with decreasing MAP. We find that approaching this critical threshold is accompanied by critical slowing down, which can hence be expected to warn of accelerating biomass decline with decreasing rainfall. The critical precipitation threshold is lowest in the northwestern Amazon, whereas the eastern and southern regions may already be below their critical MAP thresholds. Overall, we identify the seasonality of precipitation and the potential evapotranspiration (PET) as the most important parameters determining the threshold value. While vegetation fires show little effect on the critical threshold and the biomass pattern in general, the ability of trees to adapt to water stress by investing in deep roots leads to increased biomass and a lower critical threshold in some areas in the eastern and southern Amazon where seasonality and PET are high. Our findings underscore the risk of Amazon forest degradation due to changes in the water cycle, and imply that regions that are currently characterized by higher water availability may exhibit heightened vulnerability to future drying., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier B.V. All rights reserved.)

Published
2024
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