scholarly journals Asymmetric warming significantly affects net primary production, but not ecosystem carbon balances of forest and grassland ecosystems in northern China

2015 ◽  
Vol 5 (1) ◽  
Author(s):  
Hongxin Su ◽  
Jinchao Feng ◽  
Jan C. Axmacher ◽  
Weiguo Sang
Keyword(s):  
Primary Production ◽  
Net Primary Production ◽  
Northern China ◽  
Ecosystem Carbon ◽  
Grassland Ecosystems ◽  
Carbon Balances

Net primary production and ecosystem carbon flux of Brazilian tropical savanna ecosystems from eddy covariance and inventory methods

2022 ◽  
Author(s):  
George Louis Vourlitis ◽  
Osvaldo Borges Pinto Jr. ◽  
Higo José Dalmagro ◽  
Paulo Arruda ◽  
Francisco de Almeida Lobo ◽  
...  
Keyword(s):  
Primary Production ◽  
Eddy Covariance ◽  
Carbon Flux ◽  
Net Primary Production ◽  
Tropical Savanna ◽  
Ecosystem Carbon

Response of the annual biomass production of a typical steppe plant community to precipitation fluctuations

2014 ◽  
Vol 36 (6) ◽  
pp. 527 ◽  
Author(s):  
Zhen Wang ◽  
Qing Zhang ◽  
Xiaoping Xin ◽  
Yong Ding ◽  
Xiangyang Hou ◽  
...  
Keyword(s):  
Plant Community ◽  
Coefficient Of Variation ◽  
Positive Relationship ◽  
Net Primary Production ◽  
Northern China ◽  
Perennial Grasses ◽  
Annual Precipitation ◽  
Typical Steppe ◽  
Grassland Ecosystems ◽  
Annual Biomass

Understanding the relationship between the aboveground net primary production (ANPP) and annual precipitation in arid and semiarid grasslands is crucial for assessing the effects of climate change on grassland ecosystems. The temporal pattern of ANPP, based on long-term data on a semiarid ecosystem in Inner Mongolia, was investigated. The biomass of perennial grasses, perennial forbs and Stipa grandis P. Smirn., showed a positive relationship with annual precipitation. The amount of annual precipitation also changed the annual biomass of 13 other dominant species and consequently the ANPP. The coefficient of variation of the ANPP of the plant community was lower than the coefficient of variation of annual precipitation. Irrespective of the strong inter-annual variation in annual precipitation, the positive relationship found between ANPP and annual precipitation suggests the dependence of ANPP upon hydrological variations in typical steppe. Our findings highlight the importance of dominant perennial species and functional groups in mediating the responses of ANPP to annual precipitation in the typical steppe in northern China.

scholarly journals Human appropriation of net primary production estimates in the Xinjiang grasslands

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0242478
Author(s):  
Xiaotao Huang ◽  
Li Ma ◽  
Geping Luo ◽  
Chunbo Chen ◽  
Gangyong Li ◽  
...  
Keyword(s):  
Primary Production ◽  
Human Activities ◽  
Net Primary Production ◽  
Grazing Intensity ◽  
Grassland Management ◽  
Tianshan Mountains ◽  
Interannual Variations ◽  
Natural Ecosystems ◽  
Grassland Ecosystems ◽  
Southern Xinjiang

The human appropriation of net primary production (HANPP) was developed to estimate the intensity of human activities in natural ecosystems, which is still unclear in the Xinjiang grasslands. Using the Biome-Biogeochemical Cycle (Biome-BGC) grazing model in combination with field data, we assessed the HANPP and explored its spatiotemporal patterns in the Xinjiang grasslands. Our results showed that (1) the HANPP increased from 38 g C/m2/yr in 1979 to 88 g C/m2/yr in 2012, with an average annual increase of 1.47%. The HANPP was 80 g C/m2/yr, which represented 51% of the potential net primary production (NPPpot), and the HANPP efficiency was 70% in this region. (2) The areas with high HANPP values mainly occurred in northern Xinjiang and northwest of the Tianshan Mountains, while areas with low HANPP values mainly occurred in southern Xinjiang and southwest of the Tianshan Mountains. (3) Interannual variations in HANPP and NPPpot were significantly positively correlated (P<0.01). Interannual variations in HANPP efficiency and grazing intensity were negatively correlated (P<0.01). These results can help identify the complex impacts of human activities on grassland ecosystems and provide basic data for grassland management.

scholarly journals Quantifying and mapping the human appropriation of net primary production in earth's terrestrial ecosystems

2007 ◽  
Vol 104 (31) ◽  
pp. 12942-12947 ◽  
Author(s):  
H. Haberl ◽  
K. H. Erb ◽  
F. Krausmann ◽  
V. Gaube ◽  
A. Bondeau ◽  
...  
Keyword(s):  
Primary Production ◽  
Net Primary Production ◽  
Terrestrial Ecosystems
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