Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens
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...
Published in: | Science of The Total Environment |
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Elsevier
2022
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ftunivcmadrid:oai:www.ucm.es:72522 2023-05-15T13:45:45+02:00 Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens Beltrán Sanz, Nuria Raggio Quilez, José Gonzalez, Sergi Dal Grande, Francesco Prost, Stefan Pintado Valverde, Ana Green, Allan García Sancho, Leopoldo 2022-04-26 application/pdf https://eprints.ucm.es/id/eprint/72522/ https://eprints.ucm.es/id/eprint/72522/1/1-s2.0-S0048969722025918-main.pdf https://doi.org/10.1016/j.scitotenv.2022.155495 en eng Elsevier https://eprints.ucm.es/id/eprint/72522/1/1-s2.0-S0048969722025918-main.pdf cc_by_nc_nd info:eu-repo/semantics/openAccess CC-BY-NC-ND Botánica info:eu-repo/semantics/article PeerReviewed 2022 ftunivcmadrid https://doi.org/10.1016/j.scitotenv.2022.155495 2022-11-30T00:07:59Z 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. Metabolic activity is also crucial for estimating the NPP, which is highly dependent on the type, distribution, and duration of the hydration sources available throughout the year. Under RCP 4.5 and RCP 8.5, metabolic activity will increase slightly compared with that at present due to the increased precipitation events predicted in MIROC5. Temperature is highlighted as the main driver for NPP projections, and thus climate warming will lead to an average increase in NPP of 167–171% at the end of the century. However, small changes in other drivers such as light and relative humidity may strongly modify the metabolic activity patterns of poikilohydric autotrophs, and thus their NPP. Species with similar physiological response ranges to the species investigated in the present study are expected to behave in a similar manner provided that liquid water is available. Article in Journal/Newspaper Antarc* Antarctic Tundra Universidad Complutense de Madrid (UCM): E-Prints Complutense Antarctic The Antarctic Science of The Total Environment 835 155495 |
institution |
Open Polar |
collection |
Universidad Complutense de Madrid (UCM): E-Prints Complutense |
op_collection_id |
ftunivcmadrid |
language |
English |
topic |
Botánica |
spellingShingle |
Botánica Beltrán Sanz, Nuria Raggio Quilez, José Gonzalez, Sergi Dal Grande, Francesco Prost, Stefan Pintado Valverde, Ana Green, Allan García Sancho, Leopoldo Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens |
topic_facet |
Botánica |
description |
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. Metabolic activity is also crucial for estimating the NPP, which is highly dependent on the type, distribution, and duration of the hydration sources available throughout the year. Under RCP 4.5 and RCP 8.5, metabolic activity will increase slightly compared with that at present due to the increased precipitation events predicted in MIROC5. Temperature is highlighted as the main driver for NPP projections, and thus climate warming will lead to an average increase in NPP of 167–171% at the end of the century. However, small changes in other drivers such as light and relative humidity may strongly modify the metabolic activity patterns of poikilohydric autotrophs, and thus their NPP. Species with similar physiological response ranges to the species investigated in the present study are expected to behave in a similar manner provided that liquid water is available. |
format |
Article in Journal/Newspaper |
author |
Beltrán Sanz, Nuria Raggio Quilez, José Gonzalez, Sergi Dal Grande, Francesco Prost, Stefan Pintado Valverde, Ana Green, Allan García Sancho, Leopoldo |
author_facet |
Beltrán Sanz, Nuria Raggio Quilez, José Gonzalez, Sergi Dal Grande, Francesco Prost, Stefan Pintado Valverde, Ana Green, Allan García Sancho, Leopoldo |
author_sort |
Beltrán Sanz, Nuria |
title |
Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens |
title_short |
Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens |
title_full |
Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens |
title_fullStr |
Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens |
title_full_unstemmed |
Climate change leads to higher NPP at the end of the century in the Antarctic Tundra: Response patterns through the lens of lichens |
title_sort |
climate change leads to higher npp at the end of the century in the antarctic tundra: response patterns through the lens of lichens |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://eprints.ucm.es/id/eprint/72522/ https://eprints.ucm.es/id/eprint/72522/1/1-s2.0-S0048969722025918-main.pdf https://doi.org/10.1016/j.scitotenv.2022.155495 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Tundra |
genre_facet |
Antarc* Antarctic Tundra |
op_relation |
https://eprints.ucm.es/id/eprint/72522/1/1-s2.0-S0048969722025918-main.pdf |
op_rights |
cc_by_nc_nd info:eu-repo/semantics/openAccess |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1016/j.scitotenv.2022.155495 |
container_title |
Science of The Total Environment |
container_volume |
835 |
container_start_page |
155495 |
_version_ |
1766230542379909120 |