From pursuing quantity to pursuing quality: exploring the coupling coordination and influencing factors of high-quality tourism development and ecosystem service value in the Pearl River Delta urban agglomeration of China

The findings are as follows: (1) the comprehensive index of high-quality tourism development exhibited a trend of an initial rise followed by a decline, displaying a spatial distribution pattern of "high in the central region, low in the eastern and western regions." (2) The overall ESV showed a fluctuating downward trend, with a spatial pattern of "low in the east, high in the west; high in the north, low in the south." (3) The coupling coordination effect first increased and then decreased, having long been in a run-in phase, presenting a spatial distribution of "high in the north, low in the south; high in the west, low in the east." (4) The coordinated development of the two systems is influenced by economic development, governmental environmental regulations, urban expansion, and industrial structure. The results of this research provide significant theoretical and practical implications for the coordinated development of tourism system and ecosystem services.