Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica

Abstract Summertime ecosystem respiration (ER) rates through seven sites were measured at an upland tundra on Fildes Peninsula in maritime Antarctica to investigate effects of topographic gradient, vegetation types and climatic factors on tundra ER rates. Overall the highest ER rates occurred at the...

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Autores principales:	Tao Bao, Renbin Zhu, Xianglan Li, Wenjuan Ye, Xiao Cheng
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/fc6586ff55cc48a186ceb5eddc124452
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spelling	oai:doaj.org-article:fc6586ff55cc48a186ceb5eddc1244522021-12-02T15:08:49ZEffects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica10.1038/s41598-018-30263-62045-2322https://doaj.org/article/fc6586ff55cc48a186ceb5eddc1244522018-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-30263-6https://doaj.org/toc/2045-2322Abstract Summertime ecosystem respiration (ER) rates through seven sites were measured at an upland tundra on Fildes Peninsula in maritime Antarctica to investigate effects of topographic gradient, vegetation types and climatic factors on tundra ER rates. Overall the highest ER rates occurred at the tundra top, followed at the middle slope, and the lowest rates at the lower slope. The daily highest ER rates occurred at noon whereas the lowest at 6 am. There was a significant positive correlation (P < 0.05) between tundra ER and 0–10 cm soil temperature, but a significant negative correlation (P < 0.01) between ER and soil moisture. A high Q10 value of 2.69 was obtained when all the data were combined, indicating soil temperature sensitivity of tundra ER. The mean ER at the tundra sites with moss coverage (72.2 ± 4.4 mg CO2 m−2 h−1) was significantly higher (P < 0.01) than that at the sites with lichen coverage (46.8 ± 8.7 mg CO2 m−2 h−1). The tundra sites without snow coverage experienced significant CO2 release, whereas the emission through ER was very low at the tundra sites with snow coverage. Our results indicated that topographic gradient, soil temperature, soil moisture, vegetation types and snow coverage might affect tundra ER in maritime Antarctica.Tao BaoRenbin ZhuXianglan LiWenjuan YeXiao ChengNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Tao Bao Renbin Zhu Xianglan Li Wenjuan Ye Xiao Cheng Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica
description	Abstract Summertime ecosystem respiration (ER) rates through seven sites were measured at an upland tundra on Fildes Peninsula in maritime Antarctica to investigate effects of topographic gradient, vegetation types and climatic factors on tundra ER rates. Overall the highest ER rates occurred at the tundra top, followed at the middle slope, and the lowest rates at the lower slope. The daily highest ER rates occurred at noon whereas the lowest at 6 am. There was a significant positive correlation (P < 0.05) between tundra ER and 0–10 cm soil temperature, but a significant negative correlation (P < 0.01) between ER and soil moisture. A high Q10 value of 2.69 was obtained when all the data were combined, indicating soil temperature sensitivity of tundra ER. The mean ER at the tundra sites with moss coverage (72.2 ± 4.4 mg CO2 m−2 h−1) was significantly higher (P < 0.01) than that at the sites with lichen coverage (46.8 ± 8.7 mg CO2 m−2 h−1). The tundra sites without snow coverage experienced significant CO2 release, whereas the emission through ER was very low at the tundra sites with snow coverage. Our results indicated that topographic gradient, soil temperature, soil moisture, vegetation types and snow coverage might affect tundra ER in maritime Antarctica.
format	article
author	Tao Bao Renbin Zhu Xianglan Li Wenjuan Ye Xiao Cheng
author_facet	Tao Bao Renbin Zhu Xianglan Li Wenjuan Ye Xiao Cheng
author_sort	Tao Bao
title	Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica
title_short	Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica
title_full	Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica
title_fullStr	Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica
title_full_unstemmed	Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica
title_sort	effects of multiple environmental variables on tundra ecosystem respiration in maritime antarctica
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/fc6586ff55cc48a186ceb5eddc124452
work_keys_str_mv	AT taobao effectsofmultipleenvironmentalvariablesontundraecosystemrespirationinmaritimeantarctica AT renbinzhu effectsofmultipleenvironmentalvariablesontundraecosystemrespirationinmaritimeantarctica AT xianglanli effectsofmultipleenvironmentalvariablesontundraecosystemrespirationinmaritimeantarctica AT wenjuanye effectsofmultipleenvironmentalvariablesontundraecosystemrespirationinmaritimeantarctica AT xiaocheng effectsofmultipleenvironmentalvariablesontundraecosystemrespirationinmaritimeantarctica
_version_	1718388038545965056

Effects of multiple environmental variables on tundra ecosystem respiration in maritime Antarctica

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