CO 2 Rise Directly Impairs Crop Nutritional Quality.
Sterre F Ter Haar, Peter M van Bodegom, Laura Scherer
Kernaussage
Rising atmospheric CO2 concentrations lead to a significant mean decrease of 3.2% in the nutrient content of edible crop parts across all crops and nutrients, with 77% of high-power nutrients decreasing and 15% increasing, threatening nutrient security.
Abstract
Rising CO 2 levels indirectly affect food availability (e.g., through climate shifts, biological consequences, and shifting socioeconomic systems). Less known is the direct effect of CO 2 on nutrient availability by changing the plant stoichiometry. We help fill this gap, presenting a new methodology and creating the largest meta-analysis on edible plant parts to date, including the most data (5324 entries covering 29,524 observation pairs), crops (43), and (anti)nutrients (32). The results show a pervasive elemental shift across a wide range of species as CO 2 rises. Elements respond differentially, with zinc decreasing the most. Plants with not only a C3 but also a C4 photosynthetic pathway respond. Impacts vary by species and tissue type. This stoichiometric shift can lead to (worsening) malnutrition even in previously sufficient populations. Nutrient security is under threat even if food security remains adequate; food will become more caloric and less nutritious.
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Quelle: PubMed Central / National Library of Medicine (NLM). Apollion steht in keiner Verbindung mit NLM und wird von NLM nicht empfohlen. Evidenzgrade bewerten die methodische Studienqualität — nicht die inhaltliche Richtigkeit.
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