[Figure 6]
Additionally, the variations of ecosystem indicators were different
among cities (Fig 7). The ecosystem vigor increased wholly, mainly in
Inner Mongolia, Shaanxi, Gansu, Yunnan, Guizhou, and Guangxi provinces.
Nevertheless, vigor in cities along the middle and lower reaches of the
Yellow River basin and the Yangtze River basin showed a downward trend
(Fig 7a). Furthermore, ecosystem organization and resilience were
dominated by a slight decline state, with relatively prominent in the
areas east of the Hu Line (Fig 7b, 7c). In addition, the change rate of
EHI mainly displayed slightly increased (Fig 7d). However, some cities
witnessed degraded ecosystem health, mainly in the Tibet Autonomous
Region, Heilongjiang Province, southern Liaoning Province, Hebei
Province, the middle and lower reaches of the Yellow River Basin, and
along the Yangtze River Basin, with a significant decline in the YRD
area.