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[1]LI Tingting,MA Chao,GUO Zengzhang.Response of Spatiotemporal Change of NPP to Climate in Helanshan Mountain Nature Reserve from 2004 to 2015[J].Research of Soil and Water Conservation,2020,27(06):254-261.

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Response of Spatiotemporal Change of NPP to Climate in Helanshan Mountain Nature Reserve from 2004 to 2015

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 27 Number of periods: 2020 06 Page number: 254-261 Column: 目次 Public date: 2020-10-20

Title:: Response of Spatiotemporal Change of NPP to Climate in Helanshan Mountain Nature Reserve from 2004 to 2015

Author(s):: LI Tingting¹, MA Chao^1,2, GUO Zengzhang^2,3; (1.School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, China; 2.Key Laboratory of Spatiotemporal Information and Ecological Restoration of Mines, MNR, Henan Polytechnic University, Jiaozuo, Henan 454003, China; 3.Henan College of Surveying and Mapping, Zhengzhou 451464, China)

Keywords:: Helanshan Mountain Nature Reserve; Ningxia; net primary productivity; ecological profile; biomass; climate change

CLC:: Q948; P467

DOI:: -

Abstract:: In order to reveal the correlation between the change of net primary productivity(NPP)and climate in Helanshan Mountain Nature Reserve of Ningxia, spatial and temporal variation of vegetation NPP and its response to climate over Helanshan Mountain Nature Reserve of Ningxia from 2004 to 2015 was quantitatively analyzed on the basis of MOD17A3H NPP data, SRTM DEM data and China Meteorological data. The results showed that:(1)from 2004 to 2015, the average vegetation NPP in the study area was 97.91 g C/(m²·a); the growth rate of vegetation NPP was 0.28 g C/(m²·a); the total NPP variation range was 0.32～0.50 Tg C/a during research period;(2)vegetation NPP had strong spatial heterogeneity; the horizontal zonality analysis indicated that total NPP in the north was better than that in the south(0.042 5 Tg C>0.031 6 Tg C), and that in the east was better than that in the west(0.014 5 Tg C>0.007 3 Tg C); and the vertical zonality analysis indicated that the NPP had characteristics of vertical landscape structure change of coniferous forest-broadleaf forest-shrub-grassland-desert; the high NPP mainly distributed in area above the altitude of 2 500 m;(3)the change trend of climate over study area was from cold to humidification, the annual change rate of temperature was -0.01℃, and the annual change rate of precipitation was 2.77 mm; the vegetation NPP had a significant positive correlation with annual precipitation(r=0.646 8, p<0.05), in detail, vegetation NPP of grassland and shrub area had the strongest response to precipitation. Although the ecological structure of Helanshan Mountain Nature Reserve of Ningxia had the slowly improving trend, the forest ecosystem was still extremely fragile. The ecological protection work will have a long way to go.

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Last Update: 2020-10-20