JOURNAL OF NATURAL RESOURCES ›› 2017, Vol. 32 ›› Issue (10): 1691-1704.doi: 10.11849/zrzyxb.20160928

• Resource Ecology • Previous Articles     Next Articles

Impacts of Urban Expansion on Ecosystem Services in the Drylands of Northern China: A Case Study in the Hohhot-Baotou-Ordos Urban Agglomeration Region

SUN Ze-xiang1a, 1b, LIU Zhi-feng1a, 1b, HE Chun-yang1a, 1b, WU Jian-guo1a, 2   

  1. 1. a. Center for Human-Environment System Sustainability, State Key Laboratory of Earth Surface Processes and Resource Ecology, b. School of Natural Resources, Faculty of Geographical Science, Beijing Normal University, Beijing 100875, China;
    2. School of Life Sciences and Global Institute of Sustainability, Arizona State University, Tempe, AZ 85287, USA
  • Received:2016-08-29 Revised:2016-09-27 Online:2017-10-20 Published:2017-10-20
  • Supported by:
    National Natural Science Foundation of China, No.41501195; National Basic Research Program of China, No.2014CB954302 and 2014CB954303

Abstract: Understanding the impacts of urban expansion on ecosystem services (ESs) in the drylands of northern China is important for regional human well-being and sustainable develop-ment. In this paper, we assessed the impacts of urban expansion on ESs in the Hohhot-Baotou-Ordos (HBO) urban agglomeration region, a rapidly urbanizing drylands in North China, at three scales: urban agglomeration scale, city scale, and county scale. First, we quantified four key ESs in HBO region in 1990, including habitat quality (HQ), crop production (CP), meat production (MP), and carbon storage (CS). Second, we analyzed the processes and modes of urban expansion in HBO region during 1990-2013. Finally, we evaluated the influences of urban expansion on ESs at urban agglomeration, city and county scales. We found that the HBO region experienced a rapid urban expansion during 1990-2013, with urban land area increasing by 1.2 times from 314.22 km2 to 692.10 km2. The rapid urban expansion in HBO region resulted in obvious decreases of the four key ESs. Among these ESs, CP suffered the biggest loss with a decrease of 13 581.41 t, accounting for 0.99% of total CP in HBO region in 1990. At the same time, MP and CS decreased 70.19 t and 1.65 Tg C, accounting for 0.25% of total MP and 0.29% of total CS in HBO region in 1990, respectively. In addition, HQ decreased 0.47, accounting for 88.68% of the mean HQ in HBO region in 1990. The modes of edge expansion and leapfrog expansion had the greatest impacts on ESs in HBO region. During 1990-2013, the decreases of CP, MP and CS caused by edge expansion accounted for more than 60% of the total decrease of ESs in HBO. The losses of MP caused by leapfrog expansion accounted for more than 1/3 of the total losses of ESs in HBO region. The large-scale decreases of cropland and grassland during the urban growth of edge expansion and leapfrog expansion were the main causes for the losses of ESs. Thus, we suggest that effective utilization and management of urban land with respect to urban growth of edge expansion and leapfrog expansion are needed to reduce the impacts of urban expansion on ESs in HBO region.

Key words: drylands in North China, ecosystem service, Hohhot-Baotou- Ordos (HBO), multi-scale analysis, urban expansion, urban growth mode

CLC Number: 

  • F293.2