Chin J Plan Ecolo ›› 2014, Vol. 38 ›› Issue (7): 675-686.doi: 10.3724/SP.J.1258.2014.00063

• Research Articles • Previous Articles     Next Articles

Impact of land use change during 1989–2009 on eco-capacity in Dongjiang watershed

PENG Zi1, GU Cheng-Yan1, LIU Zhi-Yong2, LIN Wen3, and ZHOU Ping1*   

  1. 1Guangdong Academy of Forestry, Guangzhou 510520, China;

    2Institute of Geography, Heidelberg University, Heidelberg 69120, Germany;

    3College of Forestry, South China Agricultural University, Guangzhou 510642, China
  • Received:2013-12-16 Revised:2014-06-07 Online:2014-07-10 Published:2014-07-01
  • Contact: ZHOU Ping E-mail:zhoupinger@qq.com

Abstract:

Aims For sustainable watershed development planning, this study explores how ecological carrying capacity varies with changes in land use type and population.
Methods Based on interpretation and analysis of five Landsat TM remote sensing images for 1989, 1994, 1999, 2004, and 2009, respectively, we examined the spatio-temporal patterns of land use change in the upper, middle, and lower reaches of Dongjiang watershed, using the total rate of change and single and integrated degree of land use dynamics as indicators. We calculated the total and per capita eco-capacity for the watershed in different years based on the population data, equivalence factors, and yield factors, in addition to the data of land use and land cover change, and further analyzed the factors determining the direction of changes in the eco-capacity.
Important findings The results showed that: (1) there were apparent changes in the area for various land use types between 1989 and 2009. Despite the urban development, the coverage of forest vegetation increased, indicating lack of trade-off between urbanization and vegetation coverage. However, there were different patterns of change in land use among the upper, middle, and lower reaches. The land use type mainly varied from garden fields to forests in the upper and middle reaches of the watershed, while in the lower reach a change from arable land to build-up area dominated. (2) With the population growth along the Dongjiang watershed over the past two decades, although the per capita eco-capacity indicated a downward trend, its rate of decline lagged behind the population growth rate, and the total eco-capacity still showed a trend of increase, implying an optimization of land use types during the 20-year period. With respect to the temporal patterns, in the decade (1994–2004) after the end of the “10-year greening of Guangdong Province”, per capita eco-capacity tended to be relatively stable under the pressure of population growth, while it declined quickly in the periods of 1989–1994 and 2004–2009. The former period was probably associated with the development of reform and opening up policy, and the latter seemed to have less possibility on spatial optimization of land use types. The total eco-capacity showed different trends among the three regions; the upper and middle reaches exhibited an unstable trend (i.e., from decreasing to increasing), while the lower reach indicated a pattern of increasing–decreasing–stable trend. In conclusion, the increasing population demand for urbanization did not lead to deterioration of the forest resources in the watershed. To some extent, we could thus achieve the coordinated development in both aspects. In spite of increasing demand on ecological resources with population growth, we could establish a better strategy in land use to improve ecological services, and to reduce the downward trend in the per capita eco-capacity.

No related articles found!
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] Dan Jiang;Yinxin Li *;Lingfeng Huang;Fanrong Zeng;Yuke Zhang . Effects of Salinity and Temperature on Introduction and Cultivation of the Euhalophyte Salicornia bigelovii Torr. in the Xiamen Ambient Sea[J]. Chin Bull Bot, 2008, 25(05): 533 -542 .
[2] Liang Zheng. Advance of Studies on the Structure and Function of Peroxisomes and Glyoxysomes[J]. Chin Bull Bot, 1989, 6(03): 141 -146 .
[3] YANG Lei ZHAO Yun-Yun HE Yi-Kun. The Molecular Mechanism of Endoreduplication[J]. Chin Bull Bot, 2004, 21(03): 280 -287 .
[4] Wu Zhao-ming Wang Quan-qiu Gao Xiao-xia and Xu Rong. Effect of Lanthanum and Cerium on the Activity of Glutamic-Pyruvic Transminase and Glutamate Dehydrogenase[J]. Chin Bull Bot, 1997, 14(增刊): 64 -67 .
[5] WU Min-Sheng and DAI Jing-Rui. Amplified Fragment Length Polymorphism (AFLP) a New Molecular Marker[J]. Chin Bull Bot, 1998, 15(04): 68 -74 .
[6] Niu Jia-shu. Studies on the Determination of Element Potassium in Plant by Ahematin Current Oscillopolarngraphy[J]. Chin Bull Bot, 1997, 14(02): 55 -57 .
[7] Jianfeng Ning, Qingsong Zheng, Xianzhong Zou, Lili Sun, Yao Yao, Yong Chen, Jinlong Wu, Lan Wei. Physiological Responses of Apocynum venetum to Different Levels of Salt Stress[J]. Chin Bull Bot, 2010, 45(06): 689 -697 .
[8] Yuxia Song;Yongqing Ma;*;Dongling Niu;Shenghu Guo;Guoqi Zheng;Hongai Ma;Miao Li. Morphological Development of Parasitic Growth in Cistanche deserticola[J]. Chin Bull Bot, 2008, 25(06): 680 -686 .
[9] Liu Bing-hua and Yang Li. A Study of Meiotic Duration in Field Wheat[J]. Chin Bull Bot, 1988, 5(04): 243 -245 .
[10] BAO Jin-song and XIA Ying-Wu. Recent Advances on Molecular Biology of Starch Biosynthesis in Rice (Oryza sativa L.)[J]. Chin Bull Bot, 1999, 16(04): 352 -358 .