| Ecological security evaluation based on emergy\|ecological footprint model at the northern farming\|pastoral ecotone in Dingxi city |
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| DOI：10.7606/j.issn.1000-7601.2023.02.28 |
| Key Words: emergy\|ecological footprint model ecological security assessment northern farming\|pastoral ecotone Dingxi city |
| Author Name | Affiliation | | LU Yanhua | College of forest, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | YAN Lijuan | College of Agronomy, Gansu Agriculture University,Lanzhou, Gansu 730070, China | | LI Guang | College of forest, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | MA Weiwei | College of forest, Gansu Agriculture University, Lanzhou, Gansu 730070, China | | LIANG Yunliang | College of forest, Gansu Agriculture University, Lanzhou, Gansu 730070, China |
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| Abstract: |
| In order to analyze the ecological security of the northern farming\|pastoral ecotone, this study took Dingxi City, a typical representative region of the northern farming\|pastoral ecotone, as a research object,and used the emergy\|ecological footprint model to examine the ecological security situation in this area for a long time series.The results revealed that from 1995 to 2019, the emergy ecological carrying capacity of per capita in Dingxi increased from 0.61 hm2·cap-1 to 0.75 hm2·cap-1, and the emergy ecological footprint of per capita increased from 1.22 hm2·cap-1to 1.60 hm2·cap-1. From the components of emergy ecological footprint, the emergy ecological footprint of cultivated land contributed the most to Dingxi, followed by the grassland. Over the past 25 years, Dingxi City has been in ecological deficit, which is expanding. The ecological footprint of ten\|thousand\|Yuan GDP has decreased from 11.92×104 hm2·CNY-1 to 1.09×104 hm2·CNY-1. The diversity of ecological footprint has changed from 0.92 to 1.44. The ecological coordination coefficient has decreased from 1.34 to 1.33. The ecological pressure index has increased from 2.01 to 2.15, development capacity index has increased from 1.12 to 2.32.The level of ecological security has changed between at risk and unsafe, and the problem of ecological security needs to be solved urgently. |
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