近20 a塔里木河生态输水对植被总初级生产力变化的影响

doi:10.12118/j.issn.1000–6060.2021.03.14

干旱区地理 ›› 2021, Vol. 44 ›› Issue (3): 718-728.doi: 10.12118/j.issn.1000–6060.2021.03.14

• 塔里木河流域生态与环境 • 上一篇下一篇

近20 a塔里木河生态输水对植被总初级生产力变化的影响

张雪琪^1,²(),夏倩倩^3,⁴,陈亚宁¹(),夏振华¹,朱成刚¹,李京龙^4,⁵,郝海超^1,²,向燕芸^1,²

1.中国科学院新疆生态与地理研究,所荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐 830011
2.中国科学院大学,北京 100049
3.伊犁师范大学生物与地理科学学院,新疆伊宁 835000
4.新疆大学资源与环境科学学院,新疆乌鲁木齐 830046
5.中国气象局乌鲁木齐沙漠气象研究所,新疆乌鲁木齐 830017

收稿日期:2021-02-01 修回日期:2021-02-26 出版日期:2021-05-25 发布日期:2021-06-01
通讯作者: 陈亚宁
作者简介:张雪琪（1994-）,女,博士研究生,主要从事干旱区资源利用与生态安全研究. E-mail: zhangxueqi19@mails.ucas.ac.cn
基金资助:
科技部科技基础资源调查专项(2019FY100203)

Effects of ecological water conveyance on gross primary productivity of vegetation in Tarim River in recent 20 years

ZHANG Xueqi^1,²(),XIA Qianqian^3,⁴,CHEN Yaning¹(),XIA Zhenhua¹,ZHU Chengang¹,LI Jinglong^4,⁵,HAO Haichao^1,²,XIANG Yanyun^1,²

1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
2. University of Chinese Academy of Sciences, Beijing 100049, China
3. College of Biology and Geography, Yili Normal University, Yining 835000, Xinjiang, China
4. College of Resources and Environmental Sciences, Xinjiang University, Urumqi 830046, Xinjiang, China
5. Institute of Desert Meteorology, China Meteorological Administration, Urumqi 830017, Xinjiang, China

Received:2021-02-01 Revised:2021-02-26 Online:2021-05-25 Published:2021-06-01
Contact: Yaning CHEN

摘要/Abstract

摘要：

植被总初级生产力（Gross primary productivity,GPP）是陆地生态系统碳循环的关键环节,对维持全球碳平衡至关重要。基于Google Earth Engine平台,利用NASA LP DAAC发布的MOD17A2H产品,研究分析了塔里木河生态输水期间陆地生态系统生长季的GPP变化。结果表明：（1）生态输水后,塔里木河生态环境整体得到改善。输水前期,塔里木河生长季GPP平均为3675.51 g C·m^-2·季^-1,输水中期,生长季GPP增加到4024.09 g C·m^-2·季^-1,输水后期,该值跃升为4896.61 g C·m^-2·季^-1。2000—2020年塔里木河生长季GPP表现出明显的增加趋势,增长幅度约为每个生长季增加90.25 g C·m^-2。2010年后,上、中、下游日GPP增加幅度亦更明显,分别为每10 a增加2.54 g C·m^-2、2.17 g C·m^-2和1.74 g C·m^-2。（2）塔里木河陆地生态系统生长季（5—10月）的日GPP变化在不同区域存在明显差异。上游区日GPP变化总体上表现出先增加后减小的单峰趋势,下游区则以双峰变化趋势为主。（3）塔里木河生态输水工程有益于生长季GPP的变化,其中对6、8月的GPP变化影响更显著。

关键词: 植被总初级生产力（GPP）, 生态输水工程, 时空分布, 胡杨林重点保护区, 塔里木河

Abstract:

Gross primary productivity (GPP) is a key link in the carbon cycle of terrestrial ecosystems and is very important for maintaining global carbon balance. This paper studied and analyzed the GPP changes of terrestrial ecosystem water conveyance of the Tarim River, Xinjiang, China based on the Google Earth Engine platform; by using MOD17A2H products released by NASA LP DAAC. The results showed that: (1) the ecological environment of the Tarim River has significantly improved after ecological water conveyance. In the early stage of water conveyance, the average GPP of Tarim River growing season was 3675.51 g C·m^-2 per season in the middle stage, GPP increased to 4024.09 g C·m^-2 per season in the growing season, and raised to 4896.61 g C·m^-2 per season in the later stage. From 2000 to 2020, GPP showed an obvious increasing trend in the growing season, with an increased rate of about 90.25 g C·m^-2 in each growing season. After 2010, the daily GPP increased more in the upper, middle, and lower reaches, increasing by 2.54 g C·m^-2, 2.17 g C·m^-2, and 1.74 g C·m^-2 per 10 years, respectively. (2) During the growing season (May-October), the diurnal GPP changes of the Tarim River terrestrial ecosystem were significantly different in different regions. Overall, the daily GPP change in the upstream region showed a single peak trend that first increases and then decreases, whereas the downstream region showed a bimodal trend. (3) The ecological water conveyance project of Tarim River is beneficial to the change of GPP in the growing season, especially the change of GPP in June and August.

Key words: gross primary productivity (GPP), ecological water conveyance project, spatiotemporal distribution, Populus euphratica key conservation areas, Tarim River

张雪琪,夏倩倩,陈亚宁,夏振华,朱成刚,李京龙,郝海超,向燕芸. 近20 a塔里木河生态输水对植被总初级生产力变化的影响[J]. 干旱区地理, 2021, 44(3): 718-728.

ZHANG Xueqi,XIA Qianqian,CHEN Yaning,XIA Zhenhua,ZHU Chengang,LI Jinglong,HAO Haichao,XIANG Yanyun. Effects of ecological water conveyance on gross primary productivity of vegetation in Tarim River in recent 20 years[J]. Arid Land Geography, 2021, 44(3): 718-728.

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近20 a塔里木河生态输水对植被总初级生产力变化的影响

Effects of ecological water conveyance on gross primary productivity of vegetation in Tarim River in recent 20 years

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