Unexpected reversal of C 3 versus C 4 grass response to elevated CO 2 during a 20-year field experiment

Autor:	Melissa A. Pastore, Peter B. Reich, Tali D. Lee, Sarah E. Hobbie
Rok vydání:	2018
Předmět:	0106 biological sciences geography Biomass (ecology) Multidisciplinary geography.geographical_feature_category 010504 meteorology & atmospheric sciences Chemistry Field experiment Photosynthesis 01 natural sciences Grassland Carbon cycle chemistry.chemical_compound Animal science Carbon dioxide Nitrogen fixation Nitrogen cycle 010606 plant biology & botany 0105 earth and related environmental sciences
Zdroj:	Science. 360:317-320
ISSN:	1095-9203 0036-8075
Popis:	A short-term trend reversed Theory and empirical data both support the paradigm that C 4 plant species (in which the first product of carbon fixation is a four-carbon molecule) benefit less from rising carbon dioxide (CO 2 ) concentrations than C 3 species (in which the first product is a three-carbon molecule). This is because their different photosynthetic physiologies respond differently to atmospheric CO 2 concentrations. Reich et al. document a reversal of this pattern in a 20-year CO 2 enrichment experiment using grassland plots with each type of plant (see the Perspective by Hovenden and Newton). Over the first 12 years, biomass increased with elevated CO 2 in C 3 plots but not C 4 plots, as expected. But over the next 8 years, the pattern reversed: Biomass increased in C 4 plots but not C 3 plots. Thus, even the best-supported short-term drivers of plant response to global change might not predict long-term results. Science , this issue p. 317 ; see also p. 263
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5e1f09ed775cb2ee25d8b9869d359e14 https://doi.org/10.1126/science.aas9313 Zobrazit plný text záznamu Plný text ve formátu PDF Plný text ve formátu HTML
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