کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5750027 1619694 2017 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ecosystem services response to urbanization in metropolitan areas: Thresholds identification
ترجمه فارسی عنوان
پاسخ خدمات اکوسیستم به شهرنشینی در مناطق شهری: شناسایی آستانه
کلمات کلیدی
خدمات محیط زیستی، آستانه های شهری، رگرسیون خطی تقسیم شده، منطقه پرای شهری، شهر پکن،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
چکیده انگلیسی


- Multiple advantageous area of ecosystem services (ESs) was identified.
- There were thresholds of ESs response to population and economic urbanization.
- ESs response to land urbanization was proved to be linear decreasing.

Ecosystem service is the key comprehensive indicator for measuring the ecological effects of urbanization. Although various studies have found a causal relationship between urbanization and ecosystem services degradation, the linear or non-linear characteristics are still unclear, especially identifying the impact thresholds in this relationship. This study quantified four ecosystem services (i.e. soil conservation, carbon sequestration and oxygen production, water yield, and food production) and total ecosystem services (TES), and then identified multiple advantageous area of ecosystem services in the peri-urban area of Beijing City. Using piecewise linear regression, the response of TES to urbanization (i.e., population density, GDP density, and construction land proportion) and its thresholds were detected. The results showed that, the TES was high in the north and west and low in the southeast, and there were seven multiple advantageous areas (distributed in the new urban development zone and ecological conservation zone), one single advantageous area (distributed in the ecological conservation zone), and six disadvantageous areas (mainly distributed in the urban function extended zone). TES response to population and economic urbanization each had a threshold (229 person km− 2 and 107.15 million yuan km− 2, respectively), above which TES decreased rapidly with intensifying urbanization. However, there was a negative linear relationship between land urbanization and TES, which indicated that the impact of land urbanization on ecosystem services was more direct and effective than that of population and economic urbanization. It was also found that the negative impact of urbanization on TES was highest in the urban function extended zone, followed in descending order by that in the new urban development zone and ecological conservation zone. According to the detected relationships between urbanization and TES, the economic and population urbanization should be strengthened accompanied by slowing or even reducing land urbanization, so as to achieve urban ecological sustainability with less ecosystem services degradation.

151

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Science of The Total Environment - Volumes 607–608, 31 December 2017, Pages 706-714
نویسندگان
, , , , , ,