Anthropogenic global shifts in biospheric N and P concentrations and ratios and their impacts on biodiversity, ecosystem productivity, food security, and human health

0537367 - ÚVGZ 2021 RIV GB eng J - Journal Article
Penuelas, Josep - Janssens, I. A. - Ciais, P. - Obersteiner, M. - Sardans, Jordi
Anthropogenic global shifts in biospheric N and P concentrations and ratios and their impacts on biodiversity, ecosystem productivity, food security, and human health.
Global Change Biology. Roč. 26, č. 4 (2020), s. 1962-1985. ISSN 1354-1013. E-ISSN 1365-2486
Institutional support: RVO:86652079
Keywords : atmospheric nitrogen-deposition * foliar elemental composition * soil nutrient concentrations * long-term trends * gulf-of-mexico * cnp stoichiometry * phosphorus flows * litter decomposition * shrub encroachment * terrestrial ecosystems * anthropogenic global shifts * biodiversity * biospheric N and P concentrations * ecosystem productivity * food security * human health * soil and plant N * P ratios * water
OECD category: Biodiversity conservation
Impact factor: 10.863, year: 2020
Method of publishing: Open access
https://onlinelibrary.wiley.com/doi/10.1111/gcb.14981

The availability of carbon (C) from high levels of atmospheric carbon dioxide (CO2) and anthropogenic release of nitrogen (N) is increasing, but these increases are not paralleled by increases in levels of phosphorus (P). The current unstoppable changes in the stoichiometries of C and N relative to P have no historical precedent. We describe changes in P and N fluxes over the last five decades that have led to asymmetrical increases in P and N inputs to the biosphere. We identified widespread and rapid changes in N:P ratios in air, soil, water, and organisms and important consequences to the structure, function, and biodiversity of ecosystems. A mass-balance approach found that the combined limited availability of P and N was likely to reduce C storage by natural ecosystems during the remainder of the 21st Century, and projected crop yields of the Millennium Ecosystem Assessment indicated an increase in nutrient deficiency in developing regions if access to P fertilizer is limited. Imbalances of the N:P ratio would likely negatively affect human health, food security, and global economic and geopolitical stability, with feedbacks and synergistic effects on drivers of global environmental change, such as increasing levels of CO2, climatic warming, and increasing pollution. We summarize potential solutions for avoiding the negative impacts of global imbalances of N:P ratios on the environment, biodiversity, climate change, food security, and human health.
Permanent Link: http://hdl.handle.net/11104/0315082