Spatiotemporal evolution and future projections of habitat quality along the Duku Highway tourist corridor
This study utilizes the InVEST and PLUS models to demonstrate that habitat quality along China's Duku Highway tourist corridor has remained highly stable from 2000 to 2024 and is projected to remain virtually unchanged by 20230, despite specific land use conversions and seasonal tourism pressures.
Original paper licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). This is an AI-generated explanation of the paper below. It is not written or endorsed by the authors. For technical accuracy, refer to the original paper. Read full disclaimer
In the high, rugged mountains of Central Asia, the health of the land is measured by something called habitat quality. This is not a single number but a way of describing how well an ecosystem can support the plants and animals that live there. It depends on the mix of forests, grasslands, and water, and how much those places are disturbed by human activity. When roads cut through these landscapes, they often break up these natural spaces, making it harder for wildlife to survive. Scientists have long worried that building roads for tourists would inevitably damage these fragile environments, turning rich, wild areas into degraded zones. The question remains whether a road can exist in such a place without destroying the very nature that draws people to it in the first place.
A team of researchers from Xinjiang Normal University decided to test this idea by looking at one of the most famous scenic routes in China: the Duku Highway. This road slices through the heart of the Tianshan Mountains, connecting the north and south of the region. It is a unique case because it does not stay open all year. Due to heavy snow and dangerous conditions, the highway is closed for roughly six months every winter, reopening only from June to October. This seasonal rhythm means that while the road brings intense human activity for a few months, the ecosystem gets a long, uninterrupted break to recover. The researchers wanted to see if this pattern, combined with strict environmental rules, could protect the habitat quality even as tourism grew.
To find the answer, the team looked at the land along a twenty-kilometer strip on either side of the highway over a twenty-four-year period, from 2000 to 2024. They used computer models to track how the land changed and to measure the quality of the habitat at different times. They also looked ahead to 2030, simulating how the land might change under different scenarios, such as focusing more on the economy or prioritizing nature. The data showed that the landscape did shift slightly. Grassland, which covers most of the area, shrank by about 2.81 percent, while the amount of land covered by buildings and roads grew by 0.75 percent. Forests also expanded a bit. Despite these changes, the overall health of the habitat remained remarkably steady.
The study found that high-quality habitat, where the land is in the best condition for wildlife, consistently made up more than 70 percent of the entire corridor. Between 2000 and 2008, this high-quality area did drop by about 1.6 percent, and low-quality areas grew, but the trend slowed down and eventually stabilized. The researchers discovered that the type of land conversion mattered greatly. When unused, barren land turned into grassland, it helped improve the habitat, suggesting that nature was recovering or that restoration efforts were working. However, when grassland turned into unused land or buildings, it hurt the habitat quality. Interestingly, the expansion of buildings had a surprisingly small negative effect on the overall score because the built-up areas remained very small, covering only about 1 percent of the total land, and were mostly clustered at the northern and southern ends of the route.
Looking toward the future, the computer simulations for 2030 suggest that this stability will continue. Whether the region follows a path of natural development, strict ecological protection, or economic growth, the changes in land use are predicted to be minimal. The proportion of high-quality habitat is expected to stay just above 70 percent, with a tiny increase to 70.85 percent, while low-quality areas are projected to shrink slightly. The researchers conclude that the Duku Highway corridor has managed to avoid the severe degradation often seen with tourist roads. This success is attributed to three main factors: the harsh natural environment, which makes large-scale construction physically difficult; strict government policies that protect ecological zones; and the seasonal closure of the road, which gives the ecosystem a six-month window to heal every year.
This work fills a gap in scientific understanding by showing that a tourist road does not always have to be a threat to nature. In this specific setting, the combination of difficult terrain, strong regulations, and a seasonal break has allowed the highway and the wild landscape to coexist. The findings suggest that with the right constraints, it is possible to share a fragile environment with human visitors without causing lasting harm. The study does not claim that this result applies everywhere, but it offers a hopeful example for other sensitive mountain regions where tourism and conservation must find a balance.
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