Resources Science ›› 2018, Vol. 40 ›› Issue (1): 32-43.doi: 10.18402/resci.2018.01.04

• Orginal Article • Previous Articles     Next Articles

Impact of urbanization on terrestrial ecosystem production using Linear Modeling for Jiangsu

Jianguo LI1,2(), Huan WANG1, Jing WANG1, Qiang LI1, Zhongqi ZHANG1, Lili LIU1, Lijie PU3,4()   

  1. 1. School of Geography, Geomatics and Planning, Jiangsu Normal University, Xuzhou 221116, China
    2. Department of Geography and School of Global Studies, University of Sussex, Falmer, Brighton, BN1 9RH, UK
    3. School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China
    4. Key Laboratory of Coastal Zone Exploitation and Protection, Ministry of Land and Resources, Nanjing 210023, China
  • Received:2017-06-09 Revised:2017-10-09 Online:2018-01-20 Published:2018-01-20

Abstract:

Terrestrial ecosystem production capacity is fundamental to regional ecosystem service functioning. Urbanization processes have been the main influencing factor to reduce terrestrial ecosystem production. Here we use net primary productivity (NPP) and urbanization determined using remote sensing and GIS to study the impact of urbanization on terrestrial ecosystem production losses. Remote sensing images from Jiangsu in 1985, 1995, 2005, 2010 and 2015 were collected to record land use and cover change (LUCC) processes from 1985 to 2015. NPP of corresponding times were determined using the Carnegie-Ames-Stanford Approach. We found that urban construction lands of Jiangsu rose slowly from 1985 to 2015, and reached 10452.74 km2. During this period, the expansion rate peaked from 2005 to 2010. The urban construction land expansion rate in southern Jiangsu is significantly higher than that of northern Jiangsu. Jiangsu’s NPP varied from 33.3 to 40.23 Tg C/yr and had a rising tendency from 1985 to 2015 and the south-central part of which is highest including Yancheng City and Nantong City. The precision of NPP loss estimation rises significantly under linear modeling comprised using the traditional equalization method. Urban construction land expansion of Jiangsu triggered a significantly decrease in terrestrial ecosystem production losses of 4.43-5.99 Tg C over the past 30 years, of which the decreasing NPP in croplands caused by urbanization was the major reason, followed by wetlands. This study reveals that the rate of terrestrial ecosystem production loss in northern Jiangsu will be faster than that of southern Jiangsu in the future. Promoting urbanization quality, especially increasing the greening rate, will effectively mitigate the risk of terrestrial ecosystem production loss.

Key words: urbanization, LUCC, NPP, terrestrial ecosystem production loss, Linear Model, Jiangsu