Based on the GIMMS AVHRR NDVI data (8 km spatial resolution) for 1982–2000, the SPOT VEGETATION NDVI data (1 km spatial resolution) for 1998–2009, and observational plant biomass data, the CASA model was used to model changes in alpine grassland net primary production (NPP) on the Tibetan Plateau (TP). This study will help to evaluate the health conditions of the alpine grassland ecosystem, and is of great importance to the promotion of sustainable development of plateau pasture and to the understanding of the function of the national ecological security shelter on the TP. The spatio-temporal characteristics of NPP change were investigated using spatial statistical analysis, separately on the basis of physico-geographical factors (natural zone, altitude, latitude and longitude), river basin, and county-level administrative area. Data processing was carried out using an ENVI 4.8 platform, while an ArcGIS 9.3 and ANUSPLIN platform was used to conduct the spatial analysis and mapping. The primary results are as follows: (1) The NPP of alpine grassland on the TP gradually decreases from the southeast to the northwest, which corresponds to gradients in precipitation and temperature. From 1982 to 2009, the average annual total NPP in the TP alpine grassland was 177.2×1012 gC yr−1(yr represents year), while the average annual NPP was 120.8 gC m−2 yr−1. (2) The annual NPP in alpine grassland on the TP fluctuates from year to year but shows an overall positive trend ranging from 114.7 gC m−2 yr−1 in 1982 to 129.9 gC m−2 yr−1 in 2009, with an overall increase of 13.3%; 32.56% of the total alpine grassland on the TP showed a significant increase in NPP, while only 5.55% showed a significant decrease over this 28-year period. (3) Spatio-temporal characteristics are an important control on annual NPP in alpine grassland: a) NPP increased in most of the natural zones on the TP, only showing a slight decrease in the Ngari montane desert-steppe and desert zone. The positive trend in NPP in the high-cold shrub-meadow zone, high-cold meadow steppe zone and high-cold steppe zone is more significant than that of the high-cold desert zone; b) with increasing altitude, the percentage area with a positive trend in annual NPP follows a trend of “increasing-stable-decreasing”, while the percentage area with a negative trend in annual NPP follows a trend of “decreasing-stable-increasing”, with increasing altitude; c) the variation in annual NPP with latitude and longitude co-varies with the vegetation distribution; d) the variation in annual NPP within the major river basins has a generally positive trend, of which the growth in NPP in the Yellow River Basin is most significant. Results show that, based on changes in NPP trends, vegetation coverage and phonological phenomenon with time, NPP has been declining in certain places successively, while the overall health of the alpine grassland on the TP is improving.
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Crabtree R, Potter C, Mullen R et al., 2009. A modeling and spatial-temporal analysis framework for monitoring environmental change using NPP as an ecosystem indicator. Remote Sensing of Environment, 113(7): 1486–1496.
Cramer W, Kicklighter D W, Bondeau A et al., 1999. Comparing global models of terrestrial net primary productivity (NPP): Overview and key results. Global Change Biology, 5(S1): 1–15.
Del Grosso S, Parton W, Stohlgren T et al., 2008. Global potential net primary production predicted from vegetation class, precipitation, and temperature. Ecology, 89(8): 2117–2126.
Ding M J, Zhang Y L, Liu L S et al., 2010. Temporal and spatial distribution of grassland coverage change in Tibetan Plateau since 1982. Journal of Natural Resources, 25(12): 2114–2122. (in Chinese)
Ding M J, Zhang Y L, Sun X M et al., 2013. Spatiotemporal variation in alpine grassland phenology in the Qinghai-Tibetan Plateau from 1999 to 2009. Chinese Science Bulletin, 58(3): 396–405.
Du J, Hu J, Zhang Y et al., 2008. Responses of net primary production to climatic changes over Tibet Plateau from 1971 to 2005. Journal of Nanjing Institute of Meteorology, 31(5): 738–743. (in Chinese)
Du J Q, Shu J M, Zhang L B, 2010. Responses of natural vegetation in Huangnan Prefecture of Qinghai to climate change: A study based on NPP. Chinese Journal of Ecology, (6): 1094–1102. (in Chinese)
Gao Q Z, Wan Y F, Li Y E et al., 2007a. Grassland net primary productivity and its spatio temporal distribution in Northern Tibet: A study with CASA model. Chinese Journal of Applied Ecology, 18(11): 2526–2532. (in Chinese)
Gao Q Z, Wan Y F, Li Y E et al., 2007b. Trends of grassland NPP and its response to human activity in northern Tibet. Acta Ecologica Sinica, 27(11): 336–341. (in Chinese)
Guo X Y, He Y, Shen Y P et al., 2006. Analysis of the terrestrial NPP based on the MODIS in the source regions of Yangtze and Yellow Rivers from 2000 to 2004. Journal of Glaciology and Geocryology, 28(4): 512–518. (in Chinese)
Ke J H, Piao S L, Fang J Y, 2003. NPP and its spatio-temporal patterns in the Yangtze River watershed. Acta Phytoecologica Sinica, 27(6): 764–770. (in Chinese)
Liu J F, Xiao W F, Guo M C et al., 2011. Pattern analysis of net primary productivity of China terrestrial vegetation using 3-PGS Model. Scientia Silvae Sinicae, 47(5): 16–22. (in Chinese)
Luo T X, Li W H, Luo J et al., 1999. A comparative study on biological production of major vegetation types on the Tibetan Plateau. Acta Ecologica Sinica, 19(6): 823–831. (in Chinese)
Melillo J M, Mcguire A D, Kicklighter D W et al., 1993. Global climate change and terrestrial net primary production. Nature, 363(6426): 234–240.
Nemani R R, Keeling C D, Hashimoto H et al., 2003. Climate-driven increases in global terrestrial net primary production from 1982 to 1999. Science, 300(5625): 1560–1563.
Piao S, Ciais P, Lomas M et al., 2011. Contribution of climate change and rising CO2 to terrestrial carbon balance in East Asia: A multi-model analysis. Global and Planetary Change, 75: 133–142.
Piao S, Fang J, He J, 2006. Variations in vegetation net primary production in the Qinghai-Xizang Plateau, China, from 1982 to 1999. Climatic Change, 74(1): 253–267.
Potter C, 2004. Predicting climate change effects on vegetation, soil thermal dynamics, and carbon cycling in ecosystems of interior Alaska. Ecological Modelling, 175(1): 1–24.
Potter C S, Randerson J T, Field C B et al., 1993. Terrestrial ecosystem production: A process model based on global satellite and surface data. Global Biogeochemical Cycles, 7(4): 811–841.
Qin S G, Zhong G H, Wang J S, 2010. The influence of climate patterns on grassland NPP and the study on livestock carrying capacity in Nagqu. Journal of Arid Land Resources and Environment, 7: 159–164. (in Chinese)
Running S W, Nemani R R, Heinsch F A et al., 2004. A continuous satellite-derived measure of global terrestrial primary production. Bioscience, 54(6): 547–560.
Sellers P J, Los S O, Tucker C J et al., 1996. A revised land surface parameterization (SiB2) for atmospheric GCMs. Part II: The generation of global fields of terrestrial biophysical parameters from satellite data. Journal of Climate, 9(4): 706–737.
Shao Q Q, Fan J W et al., 2012. Integrated monitoring and assessment of ecosystem in the source regions of three rivers, China. Beijing, Science Press. (in Chinese)
Shvidenko A Z, Schepashchenko D G, Vaganov E A et al., 2008. Net primary production of forest ecosystems of Russia: A new estimate. Doklady Earth Sciences, 421: 1009–1012.
State Council Information Office (SCIO), 2003. Tibetan Ecological Construction and Environment Protection. (in Chinese)
Stow D A, Hope A, Mcguire D et al., 2004. Remote sensing of vegetation and land-cover change in Arctic tundra ecosystems. Remote Sensing of Environment, 89(3): 281–308.
Sun H L, Zheng D, Yao T D et al., 2012. Protection and construction of the national ecological security shelter zone on Tibetan Plateau. Acta Geographica Sinica, 67(1): 3–12. (in Chinese)
The Ecological Protection and Construction of Three-Rivers Nature Reserve Editorial Board (EPCTRNREB), 2007. The Ecological Protection and Construction of Three-Rivers Nature Reserve Xining: Qinghai People’s Publishing House. (in Chinese)
The Environmental Protection Bureau Office of Qinghai Province (EPBOQP), 2003. State Council officially approved Three-Rivers as a National Nature Reserve. Journal of Qinghai Environment, (1): 42. (in Chinese)
The People’s Government of Qinghai Province (PGQP), 2009. About further implementation of ecological protection and construction in the Three-Rivers Nature Reserve according to The People’s Government of Qinghai Province Certain Opinions. (in Chinese)
Tucker C J, Pinzon J E, Brown M E et al., 2005. An extended AVHRR 8-km NDVI dataset compatible with MODIS and SPOT vegetation NDVI data. International Journal of Remote Sensing, 26(20): 4485–4498.
Xiao Q G, Chen W Y, 1996. Estimating the net primary productivity in China using meteorological satellite data. Acta Botanica Sinica, 38(1): 35–39. (in Chinese)
Zhang C, Zheng J, Zhang S H et al., 2005. Extraction of hydrological information from digital elevation model with ArcGIS 9.0. Water Resources and Hydropower Engineering, 36(11): 1–4. (in Chinese)
Zhang H Z, Lu H Y, Hong J C et al., 2013. Climate change and its effect on steppe animal husbandry in Northwest Tibet. Arid Zone Research, 30(2): 308–314. (in Chinese)
Zhang W, 2007. Research of land use/cover classification and carbon stocks: A case study on Tibetan Plateau [D]. Beijing: Graduate University of Chinese Academy of Sciences. (in Chinese)
Zhang Y L, Li B Y, Zheng D, 2002. A discussion on the boundary and area of the Tibetan Plateau in China. Geographical Research, 21(1): 1–8. (in Chinese)
Zhang Z X, Liao M S, 1994. The development and application of NOAA/AVHRR. Foreign Surveying and Mapping, (4): 36–39. (in Chinese)
Zhao G S, 2011. Estimation of net primary productivity in Qinghai Province with LUE Model [D]. Harbin: Northeast Forestry University. (in Chinese)
Zhao M, Running S W, 2010. Drought-induced reduction in global terrestrial net primary production from 2000 through 2009. Science, 329(5994): 940.
Zheng D, 1996. Natural region system research of Tibetan Plateau. Science in China (Series D), 26(4): 336–341.
Zhou C P, Ouyang H, Cao Y et al., 2008. Estimation of net primary productivity in middle reaches of Yarlung Zangbo River and its two tributaries. Chinese Journal of Applied Ecology, 19(5): 1071–1076. (in Chinese)
Zhou C P, Ouyang H, Wang Q X et al., 2004. Estimation of net primary productivity in Tibetan Plateau. Acta Geographica Sinica, 59(1): 74–79. (in Chinese)
Foundation: National Basic Research Program of China, No.2010CB951704; Strategic Priority Research Program of the Chinese Academy of Sciences, No.XDB03030501; No.XDA05060704
Author: Zhang Yili, Professor, specialized in physical geography and biogeography.
This paper has been published in Chinese and revised partially.
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Zhang, Y., Qi, W., Zhou, C. et al. Spatial and temporal variability in the net primary production of alpine grassland on the Tibetan Plateau since 1982. J. Geogr. Sci. 24, 269–287 (2014). https://doi.org/10.1007/s11442-014-1087-1