Responses of Grassland Net Primary Productivity to Environmental Variables in Northern China

doi:10.5814/j.issn.1674-764x.2016.02.003

Abstract

Abstract:

Various environmental factors affect net primary productivity (NPP) of grassland ecosystem. Extensive reports on the effects of environmental variables on NPP can be found in literature. However, the agreement on the relative importance of various factors in shaping the spatial pattern of grassland NPP has not yet been reached. Here a grassland in situ NPP database comprising 602 samples in northern China for 1980-1999 was developed based on a literature review of published biomass and forage yield field measurements. Correlation analyses and dominance analysis were used to quantify the separate and combined effects of environmental variables (climate, topography and soil) on spatial variation in NPP separately. Grassland NPP ranged from 4.76 g C m^-2a^-1 to 975.94 g C m^-2a^-1, showing significant variations in space. NPP increased with annual precipitation and declined with annual mean temperature significantly. Specifically, precipitation had the greatest impact on deserts, followed by steppes and meadows. Grassland NPP decreased with increasing altitude because of water limitation, and positively correlated with slope, but weakly correlated with aspect. Soil quality showed positive effects on NPP. Annual precipitation was the dominant factor affecting the spatial variability of net primary productivity, followed by elevation.

LIU Fang, ZHANG Hongqi, XU Erqi, KANG Lei. Responses of Grassland Net Primary Productivity to Environmental Variables in Northern China[J]. Journal of Resources and Ecology, 2016, 7(2): 92-100.

References

1 Bai Y F, Wu J G, Xing Q et al . 2008. Primary production and rain use efficiency across a precipitation gradient on the Mongolia plateau. Ecology , 89(8): 2140-2153.
2 Budescu D V, 1993. Dominance Analysis - a New Approach to the Problem of Relative Importance of Predictors in Multiple-Regression. Psychological Bulletin , 114(3): 542-551.
3 Chen J M, Chen X, Ju W, 2013. Effects of vegetation heterogeneity and surface topography on spatial scaling of net primary productivity. Biogeosciences , 10(7): 4879-4896.
4 Chen S R, Wang S X, Zhou Y, 2008. Estimation of Chinese grassland productivity using remote sensing. Transactions of the CSAE , 24(1): 208-214. (in Chinese)
5 Chen X F, Chen J M, An S Q et al . 2007. Effects of topography on simulated net primary productivity at landscape scale. Journal of Environmental Management , 85(3): 585-596.
6 Coolen H, 2008. The meaning of dwelling features: conceptual and methodological issues. IOS Press, Amsterdam
7 Cramer W, Field C B, 1999. Comparing global models of terrestrial net primary productivity (NPP): introduction. Global Change Biology , 5: Iii-Iv.
8 Hong D Y, Blackmore S, 2015. The Plants of China. Cambridge University Press, Cambridge, pp154.
9 Fang J Y, Liu G H, Xu S L , 1996. Carbon storage in terrestrial ecosystem of China. In: Wang GC, Wen YP (eds) The measurement of greenhouse gas and their release and related processes. China Environmental Science Press, Beijing, pp 391-397
10 Gao Q Z, Wan Y F, Li Y et al . 2013. Effects of topography and human activity on the net primary productivity (NPP) of alpine grassland in northern Tibet from 1981 to 2004. International Journal of Remote Sensing , 34(6): 2057-2069.
11 Gomez-Mendoza L, Galicia L, Cuevas-Fernandez M L et al., 2008. Assessing onset and length of greening period in six vegetation types in Oaxaca, Mexico, using NDVI-precipitation relationships. International Journal of Biometeorology , 52(6): 511-520.
12 Goovaerts P, 2000. Geostatistical approaches for incorporating elevation into the spatial interpolation of rainfall. Journal of Hydrology , 228(1-2): 113-129.
13 Guo Q, Hu Z M, Li S G et al ., 2012. Spatial variations in aboveground net primary productivity along a climate gradient in Eurasian temperate grassland: effects of mean annual precipitation and its seasonal distribution. Global Change Biology , 18(12): 3624-3631.
14 Hong Y, Nix H A, Hutchinson M F et al . 2005. Spatial interpolation of monthly mean climate data for China. International Journal of Climatology , 25(10): 1369-1379.
15 Hsu J S, 2011. Potential Effects of Altered Precipitation Regimes on Primary Production in Terrestrial Ecosystems. Utah State University, Logan, Utah
16 Huang C Y, Asner G P, Barger N N, 2012. Modeling regional variation in net primary production of pinyon-juniper ecosystems. Ecological Modelling , 227(24): 82-92.
17 Huxman T E, Smith M D, Fay P A et al . 2004. Convergence across biomes to a common rain-use efficiency. Nature , 429(6992): 651-654.
18 Jenkins J C, Birdsey R A, Pan Y, 2001. Biomass and NPP estimation for the mid-Atlantic region (USA) using plot-level forest inventory data. Ecological Applications , 11(4): 1174-1193.
19 Kang S, Lee D, Lee J et al. 2006. Topographic and climatic controls on soil environments and net primary production in a rugged temperate hardwood forest in Korea. Ecological Research , 21(1): 64-74.
20 Knapp A K, Smith M D, 2001. Variation among biomes in temporal dynamics of aboveground primary production. Science , 291(5503): 481-484.
21 Liu J H, Gao J X, 2009. Effects of climate and land use change on the changes of NPP in the farming-pastoral ecotone of Northern China. Resources Science , 31(3): 493-500. (in Chinese)
22 Luck G W, 2007. The relationships between net primary productivity, human population density and species conservation. Journal of Biogeography , 34(2): 201-212.
23 Ma W H, Fang J Y, Yang Y H et al . 2010. Biomass carbon stocks and their changes in northern China's grasslands during 1982-2006. Science China-Life Sciences , 53(7): 841-850.
24 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.
25 Ni J, 2004. Estimating net primary productivity of grasslands from field biomass measurements in temperate northern China. Plant Ecology , 174(2): 217-234.
26 Parton W J, Scurlock J M O, Ojima D S et al. 1995. Impact of Climate Change on Grassland Production and Soil Carbon Worldwide. Global Change Biology , 1(1): 13-22.
27 Piao S L, Fang J Y, He J S et al. 2004. Spatial distribution of grassland biomass in China. Chinese Journal of Plant Ecology , 28(4): 491-498. (in Chinese)
28 Pratt J W, 1987. Dividing the indivisible: Using simple symmetry to partition variance explained. Paper presented at the Proceedings of the Second International Conference in Statistics, Tampere, Finland: University of Tampere
29 Roger E M, Alberto M-O, 2009. The SAGE handbook of quantitative methods in Psychology. SAGE Publications Ltd, London
30 Schimel D S, House J I, Hibbard K A et al. , 2001. Recent patterns and mechanisms of carbon exchange by terrestrial ecosystems. Nature , 414(6860): 169-172.
31 Scurlock J M O, Cramer W, Olson R J et al. 1999. Terrestrial NPP: Toward a consistent data set for global model evaluation. Ecological Applications , 9(3): 913-919.
32 Scurlock J M O, Hall D O, 1998. The global carbon sink: a grassland perspective. Global Change Biology , 4(2): 229-233.
33 Scurlock J M O, Johnson K, Olson R J, 2002. Estimating net primary productivity from grassland biomass dynamics measurements. Global Change Biology , 8(8): 736-753.
34 Shi Y L, 1989. 1: 1000000 Land Resources Map of China. Xi'an Map Press, Xi’an
35 Su D X, 1994. The regional distribution and productivity structure of the Chinese grassland resources. Acta Agrestia Sinica 2(1): 71-77
36 Svoray T, Karnieli A, 2011. Rainfall, topography and primary production relationships in a semiarid ecosystem. Ecohydrology , 4(1): 56-66.
37 Vanderbi, 2010. Net Primary Productivity. http: //sev.lternet.edu/node/3359. Accessed 11 September 2013
38 Wang J, Meng J J, Cai Y L, 2008. Assessing vegetation dynamics impacted by climate change in the southwestern karst region of China with AVHRR NDVI and AVHRR NPP time-series. Environmental Geology , 54(6): 1185-1195.
39 Wang K B, Shangguan Z P, 2012. Simulating the vegetation-producing process in small watersheds in the Loess Plateau of China. Journal of Arid Land , 4(3): 300-309.
40 Wang L, Jing Y S, Li K, 2010. Spatio-temporal characteristics of vegetation net primary productivity and climate change effects in Jiangsu province. Ecology and Environmental Sciences , 19(11): 2529-2533. (in Chinese)
41 Zhang H, Gao S Y, Zheng Q H, 2002. Responses of NPP of salinized meadows to global change in hyperarid regions. Journal of Arid Environments , 50(3): 489-498.
42 Wang J, Meng J J, Cai Y L, 2008. Assessing vegetation dynamics impacted by climate change in the southwestern karst region of China with AVHRR NDVI and AVHRR NPP time-series. Environmental Geology , 54(6): 1185-1195.
43 Gerten D, Luo Y Q, Le Maire G et al. 2008. Modelled effects of precipitation on ecosystem carbon and water dynamics in different climatic zones. Global Change Biology , 14(10): 1-15.
44 Wu Z T, Dijkstra P, Koch G W et al. 2011. Responses of terrestrial ecosystems to temperature and precipitation change: a meta-analysis of experimental manipulation. Global Change Biology , 17(2): 927-942.