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Altitudinal variation of ecosystem CO2 fluxes in an alpine grassland from 3600 to 4200 m |
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| Authors: | Mitsuru Hirota Pengcheng Zhang Song Gu Mingyuan Du Ayako Shimono Haihua Shen Yingnian Li Yanhong Tang |
| Affiliation: | 1. Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennohdai, Tsukuba, Ibaraki 305-8572, Japan;2. Northwest Plateau Institute of Biology, Chinese Academy of Sciences, Xining 810001, People's Republic of China;3. National Institute for Agro-Environmental Sciences, Kannondai 3-1-3, Tsukuba, Ibaraki 305-8604, Japan;4. National Institute for Environmental Studies, Onogawa 16-2, Tsukuba, Ibaraki 305-8506, Japan |
| Abstract: | Aims Recent studies have recognized the alpine grasslands on the Qinghai–Tibetan plateau as a significant sink for atmospheric CO2. The carbon-sink strength may differ among grassland ecosystems at various altitudes because of contrasting biotic and physical environments. This study aims (i) to clarify the altitudinal pattern of ecosystem CO2 fluxes, including gross primary production (GPP), daytime ecosystem respiration (Redaytime) and net ecosystem production (NEP), during the period with peak above-ground biomass; and (ii) to elucidate the effects of biotic and abiotic factors on the altitudinal variation of ecosystem CO2 fluxes. |
| Keywords: | ecosystem respiration grazing gross primary production net ecosystem production Qinghai-Tibetan Plateau |
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