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Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens
Title: Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens
Authors: Beltrán Sanz, NúriaRaggio, JoséGonzález Herrero, Sergi ORCID RESEARCHERID Autor AEMETDal Grande, FrancescoProst, StefanGreen, AllanPintado Valverde, AnaGarcía Sancho, Leopoldo
Keywords: Net primary photosynthesis; Macroclimate; Microclimate; Cryptogam; Metabolic activity; Symbiosis
Issue Date: 2022
Publisher: Elsevier
Citation: Science of the Total Environment. 2022, 835, 155495
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Abstract: Poikilohydric autotrophs are the main colonizers of the permanent ice-free areas in the Antarctic tundra biome. Global climate warming and the small human footprint in this ecosystem make it especially vulnerable to abrupt changes. Elucidating the effects of climate change on the Antarctic ecosystem is challenging because it mainly comprises poikilohydric species, which are greatly influenced by microtopographic factors. In the present study, we investigated the potential effects of climate change on the metabolic activity and net primary photosynthesis (NPP) in the widespread lichen species Usnea aurantiaco-atra. Long-term monitoring of chlorophyll a fluorescence in the field was combined with photosynthetic performance measurements in laboratory experiments in order to establish the daily response patterns under biotic and abiotic factors at micro- and macro-scales. Our findings suggest that macroclimate is a poor predictor of NPP, thereby indicating that microclimate is the main driver due to the strong effects of microtopographic factors on cryptogams.
Sponsorship : This study was financed by grant CIM2015-64728-C2-1-R and PID2019-105469RB-C21 from the Spanish Ministry of Economy and Competitiveness.
ISSN: 0048-9697
Appears in Collections:Artículos científicos 2019-2022

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