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[1]TAN Miao,ZHOU Qigang.Characteristics of Spatial and Temporal Distribution of Net Primary Productivity in Typical Mountain Regions from 2000 to 2015[J].Research of Soil and Water Conservation,2019,26(06):339-346.

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Characteristics of Spatial and Temporal Distribution of Net Primary Productivity in Typical Mountain Regions from 2000 to 2015

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 26 Number of periods: 2019 06 Page number: 339-346 Column: Public date: 2019-10-17

Title:: Characteristics of Spatial and Temporal Distribution of Net Primary Productivity in Typical Mountain Regions from 2000 to 2015

Author(s):: TAN Miao¹, ZHOU Qigang^1,2,3; 1. College of Environment and Resources, Chongqing Technology and Business University, Chongqing 400067, China;
2. School of Tourism and Land Resources, Chongqing Technology and Business University, Chongqing 400067, China;
3. Chongqing Key Laboratory of Spatial Data Mining and Big Data Integration for Ecology and Environment, Chongqing 400067, China

Keywords:: mountain area; net primary productivity; MOD17A3; terrain factor

CLC:: Q948

DOI:: -

Abstract:: In order to clarify the relationship between carbon sequestration capacity of regional vegetation and topographic factors, and to grasp the spatial and temporal distribution characteristics of primary productivity through regional long time series, based on the vegetation NPP data of MOD17A3 and DEM data of topographic factors from 2000 to 2015, with the help of regression analysis and grading statistics, the spatial and temporal variation characteristics of vegetation NPP in Chongqing City as a typical mountainous area in recent 16 years were analyzed quantitatively by using GIS technology, and the correlation between topographic factors (elevation, slope) and vegetation NPP was studied. The results showed that:(1) from 2000 to 2015, the vegetation NPP in Chongqing City was high in the southeast and low in the northwest; the difference of vegetation NPP in the south of the Yangtze River was obvious, and it decreased from south to north, which was higher than that in the north of the Yangtze River; (2) during 16 years, the annual mean NPP of vegetation in Chongqing City fluctuated between 481.512~658.557 g C/(m²·a), of which 500~600 g C/(m²·a) accounted for the largest proportion, followed by 600~700 g C/(m²·a), compared with 2015 and 2000, the annual mean NPP of vegetation presented the increasing trend; (3) the elevation and slope were classified, and the analysis showed that the average vegetation NPP in Chongqing City increased firstly and then decreased with the increase of elevation and slope, and reached the peak value in the areas with elevations of 500~1000 m and slopes with 15°~25°; (4) the inverted ‘V’ pattern of vegetation NPP with increase first and then decrease to some extent reflects that when elevation and slope are at a critical point, climate, precipitation, vegetation distribution, slope erosion intensity and other factors have more significant impacts on vegetation NPP. These results can provide theoretical and data support for the status of vegetation carbon storage and the regulation and restoration of ecological environment in Chongqing City.

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