区域生态承载力预警评估方法及案例研究

doi:10.18306/dlkxjz.2017.03.005

Abstract

Abstract:

Based on the national needs for resources and environment carrying capacity monitoring and early-warning, this article addresses the definition of ecological carrying capacity and its evaluation method for early-warning. A case study was carried out for the Beijing-Tianjin-Hebei region. The article concludes that ecological carrying capacity refers to the ability of ecosystems in providing ecosystem services, preventing ecological problems, and ensuring ecological security. Ecological carrying capacity evaluation for early-warning is to examine the extent of human disturbances that affect ecosystem services supply with regard to water retention, soil retention, sandstorm prevention; produce ecological problems; and affect regional and national ecological security. The main procedures involve indicator and evaluation method selection, threshold identification, status and trend analysis of ecological carrying capacity with reference to early-warning threshold, and cause analysis. The method and case study of ecological carrying capacity evaluation for early-warning proposed in this study can serve as a basis for regional and national assessment.

Key words: ecological carrying capacity, early-warning, ecosystem services, ecological security, Beijing-Tianjin-Hebei region

Weihua XU, Yanying YANG, Lu ZHANG, Yi XIAO, Xiaoke WANG, Zhiyun OUYANG. Evaluation methods and case study of regional ecological carrying capacity for early-warning[J].PROGRESS IN GEOGRAPHY, 2017, 36(3): 306-312.

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References 18

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类型区	容许土壤流失量/(t/(km²·a))
西北黄土高原区	1000
南方红壤丘陵区,西南土石山区	500
东北黑土区,北方土石山区	200

类型区	高	中	低
西北黄土高原区	≤1.0	1~5.0	>5.0
南方红壤丘陵区,西南土石山区	≤1.0	1~10.0	>10.0
东北黑土区,北方土石山区	≤1.0	1~12.5	>12.5

Evaluation methods and case study of regional ecological carrying capacity for early-warning

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