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Ecological networks in response to climate change and the human footprint in the Yangtze River Delta urban agglomeration, China

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Abstract

Context

A continuous increase in human activity and drastic changes in the global climate have aggravated the loss and degree of fragmentation of natural habitats, thereby forcing various species to change their habitats to acquire suitable survival spaces.

Objectives

To investigate the potential impacts of climate change and human activity on ecological networks.

Methods

By using the human footprint, and current and future temperature, we analyzed and compared the distribution of ecological sources, corridor patency and climate connectivity within the Yangtze River Delta urban agglomeration area under scenarios with and without corridors and various levels of warming.

Results

The human footprint significantly influenced the distribution of ecological sources and corridor patency in the study area. A high human footprint index was associated with a high degree of fragmentation and weak corridor patency. In general, the current distribution of ecological sources and climate corridors exhibited a significant north–south disparity. Under all climate change scenarios assessed, the number and areas of ecological sources that achieved climate connectivity by linkage migration were higher than those achieved by adjacent migration, with the numbers for the former being 1.3–2.5 times greater than those for the latter. In addition, the level of warming that can be tolerated with linkage migration is higher than that with adjacent migration (2.8 °C vs. 0.8 °C).

Conclusion

Climate connectivity can be better enhanced by constructing corridors than controlling warming, thereby effectively increasing the climate-wise biodiversity conservation potential. Therefore, the determination of priority conservation areas from the aspects of climate change and ecological corridor conservation is recommended.

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Funding

Funding as provided by National Natural Science Foundation of China (Grant Nos. 31670470, 51878328) and The National Key R&D Program of China (Grant No. 2017YFE0196000).

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Authors and Affiliations

  1. School of Architecture and Urban Planning, Nanjing University, No. 22, Hankou Road, Nanjing, 210093, China

    Jie Su & Haiwei Yin

  2. International Institute for Earth System Science (ESSI), Nanjing University, No. 163, Xianlin Ave., Nanjing, 210023, China

    Fanhua Kong

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  1. Jie Su
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  2. Haiwei Yin
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Correspondence to Haiwei Yin.

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Su, J., Yin, H. & Kong, F. Ecological networks in response to climate change and the human footprint in the Yangtze River Delta urban agglomeration, China. Landscape Ecol 36, 2095–2112 (2021). https://doi.org/10.1007/s10980-020-01129-y

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