Chin J Plan Ecolo ›› 2017, Vol. 41 ›› Issue (2): 157-164.doi: 10.17521/cjpe.2016.0223

• Research Articles •     Next Articles

Vegetation cover change and driving factors in Fujian Province between 1975 and 2014

Chao LI, Shu-Qing ZHAO, Jing-Yun FANG*()   

  1. College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University, Beijing 100871, China
  • Received:2015-07-04 Accepted:2016-11-28 Online:2017-03-16 Published:2017-02-10
  • Contact: Jing-Yun FANG E-mail:jyfang@urban.pku.edu.cn
  • About author:

    KANG Jing-yao(1991-), E-mail: kangjingyao_nj@163.com

Abstract:

Aims Fujian Province has been one of the most severe soil erosion regions since Ming and Qing Dynasty in China. Recently, several ecological restoration projects have been implemented and they have significantly changed vegetation cover in this region.
Methods We analyzed the four-decade vegetation cover change in Fujian Province using seven time-series data of Landsat Multispectral Scanner (MSS), Thematic Mapper (TM), and Operational Land Imager (OLI) between 1975 and 2014. We further explored the possible drivers on vegetation cover change by incorporating statistical data of plantation, cropland and urbanized area.
Important findings Vegetation coverage in Fujian Province has increased from 69.0% to 77.8% between 1975 and 2014. However, a slight decrease was observed between 1995 and 2005. Spatially, forest was the primary vegetation type in the northwest, where croplands and human settlements were scattered along rivers or oceans. Shrubs and bare lands were also scattered across the northwest. In southwest, the areas of bare land, shrub land and cropland decreased, while areas of forest and human settlements expanded. The vegetation coverage and urbanized area increased at the cost of cropland and bare land.

Key words: land coverage, Landsat TM/MSS/OLI, long-term vegetation dynamics, driving factors, vegetation ecology

Table 1

Parameters of data sources of remote sensing"

卫星参数
Satellite parameter
卫星高度
Satellite height (km)
倾角
Orbit inclination (°)
覆盖周期
Overlapping period (d)
扫幅宽度
Scanning width (km)
波段数
Band number
机载传感器
Borne sensor
空间分辨率
Spatial resolution (m)
LandSat 1 920 99.125 18 185 4 MSS 78
LandSat 2 920 99.125 18 185 4 MSS 78
LandSat 3 920 99.125 18 185 4 MSS 78
LandSat 4 705 98.22 16 185 7 MSS, TM 30, 120
LandSat 5 705 98.22 16 185 7 MSS, TM 30, 120
LandSat 8 705 98.20 16 80 11 OLI, TIRS 15, 30, 100

Fig. 1

Flow chart of OLI/TM/MSS data processing. The rectangular with dash line means data preprocessing. The rectangular with dash and point line means establishment and assessment of supervised classification model. The rectangular with dash and double points line means post processing and change analysis."

Table 2

Accuracy assessment of the confusion matrix"

年份 Year 1975 1985 1995 2000 2005 2010 2014
总体精度 Total accuracy (%) 82.0 81.3 88.2 88.0 91.2 90.8 90.5
Kappa系数 Kappa coefficient 0.784 0.786 0.848 0.846 0.874 0.869 0.867

Fig. 2

Vegetation coverage of Fujian Province between 1975 and 2014. Project system: Beijing-54. Unit: m."

Fig. 3

Vegetation cover change of Fujian Province between 1975 and 2014. Small change means the ratio of changed numbers of pixels is less than 1%, and big change means vice versa. Project system: Beijing-54. Unit: m."

Table 3

Area changes and factor contributions to the changes of land use/cover in Fujian Province between 1975 and 2014 (area unit: 104 km2)"

森林Forest 人工林
Plantation
城镇
Urban
农田
Cropland
灌丛和草丛
Shrub & grass
裸地
Bare land
未分类用地
Unclassified
植被覆盖
Vegetation cover
植被覆盖率
Vegetation cover rate (%)
1975 6.334 1.640 0.047 1.450 2.043 1.889 0.377 8.377 69.0
1985 7.155 1.730 0.067 1.426 1.642 1.602 0.248 8.797 72.5
1995 7.117 3.060 0.154 1.392 1.993 1.403 0.081 9.111 75.0
2000 7.332 3.200 0.178 1.383 1.739 1.456 0.052 9.071 74.7
2005 7.393 3.390 0.212 1.348 1.538 1.493 0.156 8.931 73.6
2010 7.506 3.590 0.244 1.336 1.863 1.107 0.084 9.369 77.2
2014 8.060 3.980 0.268 1.311 1.382 1.079 0.040 9.442 77.8
面积变化
Area change
1.726 2.340 0.221 -0.139 -0.661 -0.810 -0.337 1.065
贡献率(%)
Contribution rate
162.1 219.7 20.8 -13.1 -62.1 -76.1 -31.6 100

Fig. 4

Remotely sensed area changes of forest, shrub and vegetation cover."

Fig. 5

Area changes of cropland, bare land and urban or built-up land based on statistics records."

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