Effects of land use and nitrogen fertilizer on ecosystem respiration in alpine meadow on the Tibetan Plateau

2016 ◽  
Vol 17 (6) ◽  
pp. 1626-1634 ◽  
Author(s):  
Caiyun Luo ◽  
Shiping Wang ◽  
Liang Zhao ◽  
Shixiao Xu ◽  
Burenbayin Xu ◽  
...  
Keyword(s):  
Land Use ◽  
Tibetan Plateau ◽  
Nitrogen Fertilizer ◽  
Alpine Meadow ◽  
Ecosystem Respiration ◽  
The Tibetan Plateau ◽  
Effects Of Land Use

Effects of land use and management on ecosystem respiration in alpine meadow on the Tibetan plateau

2012 ◽  
Vol 124 ◽  
pp. 161-169 ◽  
Author(s):  
Zhenhua Zhang ◽  
Jichuang Duan ◽  
Shiping Wang ◽  
Caiyun Luo ◽  
Xiaofeng Chang ◽  
...  
Keyword(s):  
Land Use ◽  
Tibetan Plateau ◽  
Alpine Meadow ◽  
Ecosystem Respiration ◽  
The Tibetan Plateau ◽  
Land Use And Management ◽  
Effects Of Land Use

Responses of ecosystem respiration and its components to fertilization in an alpine meadow on the Tibetan Plateau

2013 ◽  
Vol 56 ◽  
pp. 101-106 ◽  
Author(s):  
Jing Jiang ◽  
Ning Zong ◽  
Minghua Song ◽  
Peili Shi ◽  
Weiling Ma ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Alpine Meadow ◽  
Ecosystem Respiration ◽  
The Tibetan Plateau

scholarly journals Biophysical effects on the interannual variation in carbon dioxide exchange of an alpine meadow on the Tibetan Plateau

2017 ◽  
Vol 17 (8) ◽  
pp. 5119-5129 ◽  
Author(s):  
Lei Wang ◽  
Huizhi Liu ◽  
Jihua Sun ◽  
Yaping Shao
Keyword(s):  
Carbon Dioxide ◽  
Tibetan Plateau ◽  
Air Temperature ◽  
Interannual Variation ◽  
Alpine Meadow ◽  
Ecosystem Respiration ◽  
Gross Primary Production ◽  
Seasonal Pattern ◽  
Carbon Dioxide Exchange ◽  
The Tibetan Plateau

Abstract. Eddy covariance measurements from 2012 to 2015 were used to investigate the interannual variation in carbon dioxide exchange and its control over an alpine meadow on the south-east margin of the Tibetan Plateau. The annual net ecosystem exchange (NEE) in the 4 years from 2012 to 2015 was −114.2, −158.5, −159.9 and −212.6 g C m−2 yr−1, and generally decreased with the mean annual air temperature (MAT). An exception occurred in 2014, which had the highest MAT. This was attributed to higher ecosystem respiration (RE) and similar gross primary production (GPP) in 2014 because the GPP increased with the MAT, but became saturated due to the limit in photosynthetic capacity. In the spring (March to May) of 2012, low air temperature (Ta) and drought events delayed grass germination and reduced GPP. In the late wet season (September to October) of 2012 and 2013, the low Ta in September and its negative effects on vegetation growth caused earlier grass senescence and significantly lower GPP. This indicates that the seasonal pattern of Ta has a substantial effect on the annual total GPP, which is consistent with results obtained using the homogeneity-of-slopes (HOS) model. The model results showed that the climatic seasonal variation explained 48.6 % of the GPP variability, while the percentages explained by climatic interannual variation and the ecosystem functional change were 9.7 and 10.6 %, respectively.

scholarly journals Biophysical effects on the interannual variation in carbon dioxide exchange of an alpine meadow on the Tibetan Plateau

2016 ◽  
Author(s):  
Lei Wang ◽  
Huizhi Liu ◽  
Jihua Sun ◽  
Yaping Shao
Keyword(s):  
Carbon Dioxide ◽  
Tibetan Plateau ◽  
Air Temperature ◽  
Interannual Variation ◽  
Alpine Meadow ◽  
Ecosystem Respiration ◽  
Gross Primary Production ◽  
Seasonal Pattern ◽  
Carbon Dioxide Exchange ◽  
The Tibetan Plateau

Abstract. Eddy covariance measurements from 2012 to 2015 were used to investigate the interannual variation in carbon dioxide exchange and its control over an alpine meadow on the southeast margin of the Tibetan Plateau. The annual net ecosystem exchange (NEE) from 2012 to 2015 was −114.2, −158.5, −159.9 and −212.6 g C m−2 yr−1 and generally decreased with the mean annual air temperature (MAT). An exception occurred in 2014, which had the highest MAT. This was attributed to higher ecosystem respiration (RE) and similar gross primary production (GPP) in 2014 because the GPP increased with MAT but became saturated due to the photosynthesis capacity limit. In the spring (March to May) of 2012, lower air temperature (Ta) and drought events delayed grass germination and reduced GPP. In the late wet season (September to October) of 2012 and 2013, the lower Ta in September and its negative effects on vegetation growth caused earlier grass senescence and significantly lower GPP. This indicates that the seasonal pattern of Ta greatly affected the annual total GPP, which is consistent with the result of the homogeneity-of-slopes model. The model shows that the climatic seasonal variation explained 48.6 % of the GPP variability, and the percentage of climatic interannual variation and the ecosystem functional change were 9.7 % and 10.6 %, respectively.

Effects of seeding ratios and nitrogen fertilizer on ecosystem respiration of common vetch and oat on the Tibetan plateau

2012 ◽  
Vol 362 (1-2) ◽  
pp. 287-299 ◽  
Author(s):  
Zhenhua Zhang ◽  
Jichuang Duan ◽  
Shiping Wang ◽  
Caiyun Luo ◽  
Xiaoxue Zhu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Nitrogen Fertilizer ◽  
Ecosystem Respiration ◽  
The Tibetan Plateau ◽  
Common Vetch

Response of ecosystem respiration to warming and grazing during the growing seasons in the alpine meadow on the Tibetan plateau

2011 ◽  
Vol 151 (7) ◽  
pp. 792-802 ◽  
Author(s):  
Xingwu Lin ◽  
Zhenhua Zhang ◽  
Shiping Wang ◽  
Yigang Hu ◽  
Guangping Xu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Alpine Meadow ◽  
Ecosystem Respiration ◽  
The Tibetan Plateau ◽  
Growing Seasons

Interactive effects of short-term nitrogen enrichment and simulated grazing on ecosystem respiration in an alpine meadow on the Tibetan Plateau

2013 ◽  
Vol 33 (19) ◽  
pp. 6191-6201 ◽  
Author(s):  
宗宁 ZONG Ning ◽  
石培礼 SHI Peili ◽  
蔣婧 JIANG Jing ◽  
熊定鹏 XIONG Dingpeng ◽  
孟丰收 MENG Fengshou ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Alpine Meadow ◽  
Ecosystem Respiration ◽  
Interactive Effects ◽  
Nitrogen Enrichment ◽  
The Tibetan Plateau ◽  
Short Term ◽  
Simulated Grazing

scholarly journals Response of ecosystem respiration to experimental warming and clipping in Tibetan alpine meadow at three elevations

2013 ◽  
Vol 10 (8) ◽  
pp. 13015-13047 ◽  
Author(s):  
G. Fu ◽  
Y.-J. Zhang ◽  
X.-Z. Zhang ◽  
P.-L. Shi ◽  
Y.-T. Zhou ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Tibetan Plateau ◽  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Water Availability ◽  
Alpine Meadow ◽  
Ecosystem Respiration ◽  
The Tibetan Plateau ◽  
Experimental Warming

Abstract. This study aims to understand the response of ecosystem respiration (Reco) to warming and clipping in the alpine meadow of Tibet. A field warming experiment using open top chambers was conducted in three alpine meadow sites at elevation 4313 m, 4513 m and 4693 m on the Tibetan Plateau since July 2008. Clipping was conducted three times a year since 2009. Reco was measured from June to September in 2010–2012. For most cases, the seasonal variation of Reco was mainly affected by soil water content rather than soil and air temperature, especially under warmer environment. Experimental warming tended to decrease seasonal average Reco by 21.6% and 10.9% at elevation 4313 m and 4513 m, respectively, but significantly increased seasonal average Reco by 11.3% at elevation 4693 m. The different responses of Reco to experimental warming could be mainly dependent on temperature and water availability condition. Clipping decreased seasonal average Reco by 6.9%, 36.9% and 31.6% at elevation 4313 m, 4513 m and 4693 m. The consistent declines caused by clipping may be mainly attributed to clipping-induced decline in aboveground biomass. Our findings suggested that the response of Reco to warming differed among the alpine meadow and was regulated by soil water content on the Tibetan Plateau.

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