Effects of Urbanization Expansion on Landscape Pattern and Region Ecological Risk in Chinese Coastal City: A Case Study of Yantai City

Table 5

Area of different level ecological risk from 1990 to 2009.

Ecological risk grade	1990	2000	2009	1990	2000	2009
	Area (km^2)			Area proportion (%)
Low ecological risk region	92.97	91.47	88.47	3.42	3.36	3.25
Sublow ecological risk region	654.59	629.28	388.12	24.07	23.14	14.27
Moderate ecological risk region	1633.04	1550.90	1487.92	60.05	57.03	54.72
Subhigh ecological risk region	300.94	386.22	650.65	11.07	14.2	23.93
High ecological risk region	37.79	61.47	104.18	1.39	2.26	3.83