Abstract:

With the accelerating progress of urbanization,all kinds of ecological problems have become increasingly prominent;ensuring ecological security and constructing ecological civilization have thus become important in the context of current social development. This study proposes a source evaluation system that couples the ecological needs of residents of Guangzhou,based on "people-oriented" thinking in the construction of ecological civilization. The minimum cumulative resistance model and the resistance surface were then jointly corrected based on the nighttime light index and the impervious surface index to identify the ecological corridor network. Finally,the ecological security pattern of Guangdong Province based on the ecological components was constructed. The results show the high degree of importance of the ecological land in Guangdong Province,accounting for 61.17% of the total area,of which the ecological source area accounted for nearly half,amounting to 29.59% of the total area. The key ecological corridors,together with the potential ecological corridors and the existing corridors,have jointly built a spider web-style radiation distribution network with "one areamulticorridors-two protections". The validity of the pattern construction was verified through the nature reserve data,and the resistance surface of multi-variable data co-correction was found to be more appropriate. The ecological security pattern of Guangdong Province can be ensured by focusing on pollution control,ecological restoration,and ecological source areas maintenance. The protection of ecological sources and ecological corridors should be prioritized. The secondary ecological land around the built-up areas can be prioritized for the construction of public ecological service facilities and reducing the high-intensity ecological needs of the central city.

Key words: ecological safety pattern, minimum cumulative resistance model, ecological demand, ecological service, Guangdong Province