Effects of Ecological Water Conveyance Project on the Structure, Species Diversity and Stability of Desert Riparian Forest in the Lower Reaches of Tarim River, Northwest China

Xiyi, Wang; Ma, Tingting; Ling, Hongbo; Peng, Shuzhen

doi:10.21203/rs.3.rs-127475/v1

Cited by 3 publications

(3 citation statements)

References 33 publications

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“…This indicates that vegetation has undergone a process of degradation and then restoration. Many studies have suggested that the benefits of water conveyance will take several years to be visible and cannot be observed immediately (Wan, 2012;Guo et al, 2017;Wang and Guo, 2018). Similar to the gradual degradation of vegetation before water conveyance, the ecological responses of downstream vegetation and groundwater are also slow on the spatio-temporal scale (Chen et al, 2015a, b;Keyimu et al, 2017).…”

Section: Lucc Responses To Ecological Water Conveyancementioning

confidence: 99%

Land use/land cover change responses to ecological water conveyance in the lower reaches of Tarim River, China

et al. 2021

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The Tarim River is the longest inland river in China and is considered as an important river to protect the oasis economy and environment of the Tarim Basin. However, excessive exploitation and over-utilization of natural resources, particularly water resources, have triggered a series of ecological and environmental problems, such as the reduction in the volume of water in the main river, deterioration of water quality, drying up of downstream rivers, degradation of vegetation, and land desertification. In this study, the land use/land cover change (LUCC) responses to ecological water conveyance in the lower reaches of the Tarim River were investigated using ENVI (Environment for Visualizing Images) and GIS (Geographic Information System) data analysis software for the period of 1990-2018. Multi-temporal remote sensing images and ecological water conveyance data from 1990 to 2018 were used. The results indicate that LUCC covered an area of 2644.34 km 2 during this period, accounting for 15.79% of the total study area. From 1990 to 2018, wetland, farmland, forestland, and artificial surfaces increased by 533.42 km 2 (216.77%), 446.68 km 2 (123.66%), 284.55 km 2 (5.67%), and 57.51 km 2 (217.96%), respectively, whereas areas covered by grassland and other land use/land cover types, such as Gobi, bare soil, and deserts, decreased by 103.34 km 2 (14.31%) and 1218.83 km 2 (11.75%), respectively. Vegetation area decreased first and then increased, with the order of 2010<2000<1990<2018. LUCC in the overflow and stagnant areas in the lower reaches of the Tarim River was mainly characterized by fragmentation, irregularity, and complexity. By analyzing the LUCC responses to 19 rounds of ecological water conveyance in the lower reaches of the Tarim River from 2000 to the end of 2018, we proposed guidelines for the rational development and utilization of water and soil resources and formulation of strategies for the sustainable development of the lower reaches of the Tarim River. This study provides scientific guidance for optimal scheduling of water resources in the region.

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Section: Lucc Responses To Ecological Water Conveyancementioning

confidence: 99%

Land use/land cover change responses to ecological water conveyance in the lower reaches of Tarim River, China

et al. 2021

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“…Based on the cost-benefit theory, Ganshuang et al [17] evaluated the ecological benefit of The Hulunbuir Grasslands meadow ecological-function area. Wang Xiyi et al [18] used Constanza's value coefficient to calculate the ecological and social benefits of large-scale water-transfer projects in the lower reaches of the Tarim River. Fu Wenbing et al [19] calculated the ecological benefits of integrated management of rocky desertification in the Kras region of Suiyang County by setting up indices such as the plant-diversity index.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Research on the Profit Contribution of Forest Ecological Benefits Based on Policy and Market-Tools Compensation Projects in Nanping

2023

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Measuring the profit contribution of ecological benefits is an important prerequisite for the operation of the value-realization mechanism of ecological products. Based on the theory of ecological benefits and ecosystem services, combined with system dynamics and the project cost-benefit method, a forest-ecosystem-service capitalization of the resources and assets value and the realization of an ecological product-benefit system is constructed. The value-realization project of the national reserve-forest ecological products in Nan-ping City, Fujian Province, the National Ecological Civilization Pilot Zone, was selected to calculate the cost and income during the 30-year operational period of the project, and to calculate the profitability of the forest-ecosystem ecological benefits in the project, using different scenarios. Scenario 1: The project income will only be enough to cover the costs of the project operation, and the cost will be recovered at the end of the project operation. Scenario 2: With policy-based ecological compensation, compared with scenario 1, the total project-input line-of-revenue breakthrough and total project-cost line were advanced by 3 years and 2.5 years, respectively. Scenario 3: With the additive effect of the ecological benefit of the ecosystem, compared with scenario 2, the total project-input line-of-revenue breakthrough and total project-cost line were advanced by 3.5 years and 6 years, respectively. It is suggested that the guiding role should be that of policy-based ecological compensation, expanding the scope of ecological-market access, and attracting social investors to participate in the development of ecological products by means of diversified ecological compensation such as market-oriented tools, so as to fully realize the profit contribution of ecological benefits to the project through the realization of the value of ecological products.

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“…The augmentation was mainly driven by increasing arboreal forests, shrubberies, and grasslands (Bao et al, 2017) [26]. It signifies an upward trend in the basin's ecological status (Wang et al, 2020;Jiang et al, 2022) [27,28]. In addition to the gains from the EWDP, temperature and precipitation have exerted a pivotal role in shifting ecosystem patterns.…”

Section: Introductionmentioning

confidence: 99%

Increased Humidity Improved Desert Riparian Ecosystems in the Tarim River Basin, Northwest China, from 1990 to 2020

Guo,

Zhu,

Tang

et al. 2023

Sustainability

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Land use and land cover change (LULCC), along with the conversion of natural ecosystem cover into farmland, poses significant ecological challenges for desert riparian ecosystems. The Tarim River Basin (TRB), home to the world’s largest and most densely distributed and well-preserved desert riparian ecosystem, remains exceptionally susceptible to climate change. However, our understanding of the role of climatic factors (mean annual temperature (MAT); mean temperature during the warmest month (MWMT); relative humidity in September, October, and November (RH_SON); and the annual heat–moisture index (AHM)) in driving pattern changes in these ecosystems remains limited. To address this gap, we employed a transfer matrix approach coupled with geographically weighted regression models to conduct an extensive analysis of LULCC trends and their driving factors within the TRB from 1990 to 2020. The 30-year dataset on LULCC provided invaluable insights, revealing that the proliferation of farmland and shrubberies has precipitated the decline of arbor forests and grassland expanses. Furthermore, this expansion of farmland and shrubberies has resulted in heightened ecosystem fragmentation, particularly notable between 2005 and 2010. Our assessment indicates that artificial ecosystems are gradually transitioning back into natural states, encompassing 8.24% of the total area, chiefly attributed to the expanding shrubbery regions. Additionally, in-depth scrutiny of the impacts of climatic factors on ecosystem structure unveiled that moisture exerts the most pronounced influence on ecosystem patterns, followed by air moisture content during the growing season, while temperature exerts a relatively lesser impact. Overall, this study contributes to the realization of SDG 13 (Climate Action) and SDG 15 (Life on Land) by informing conservation efforts and sustainable land management practices in dryland desert riparian ecosystems.

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Effects of Ecological Water Conveyance Project on the Structure, Species Diversity and Stability of Desert Riparian Forest in the Lower Reaches of Tarim River, Northwest China

Cited by 3 publications

References 33 publications

Land use/land cover change responses to ecological water conveyance in the lower reaches of Tarim River, China

Land use/land cover change responses to ecological water conveyance in the lower reaches of Tarim River, China

Research on the Profit Contribution of Forest Ecological Benefits Based on Policy and Market-Tools Compensation Projects in Nanping

Increased Humidity Improved Desert Riparian Ecosystems in the Tarim River Basin, Northwest China, from 1990 to 2020

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