Sustainability of global Golden Inland Waterways

Wang, Yichu; Chen, Xiabin; Borthwick, Alistair G. L.; Li, Tianhong; Liu, Huaihan; Yang, Shaohua; Chen, Kewei; Xu, Jiang; Ni, Jinren

doi:10.1038/s41467-020-15354-1

Cited by 28 publications

(28 citation statements)

References 44 publications

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“…Rivers, as typically lotic ecosystems, are the major channels transferring millions of tons of organic materials and nutrients from the continent to the ocean, contributing substantially to global biogeochemical cycling and energy flow [17,18]. Large rivers are the cradles of flourishing human civilizations [19]. On the other hand, they are also considered critical sinks for excessive bioavailable nitrogen [20], in which nitrification is coupled with denitrification and anaerobic ammonia oxidation (anammox) to maintain the balance of nitrogen load [21].…”

Section: Introductionmentioning

confidence: 99%

Comammox Nitrospira within the Yangtze River continuum: community, biogeography, and ecological drivers

Chen

et al. 2020

The ISME Journal

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121

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The recent discovery of comammox Nitrospira as complete nitrifiers has fundamentally renewed perceptions of nitrogen cycling in natural and engineered systems, yet little is known about the environmental controls on these newly recognized bacteria. Based on improved phylogenetic resolution through successful assembly of ten novel genomes (71–96% completeness), we provided the first biogeographic patterns for planktonic and benthic comammox Nitrospira in the Yangtze River over a 6030 km continuum. Our study revealed the widespread distributions and relative abundance of comammox Nitrospira in this large freshwater system, constituting 30 and 46% of ammonia-oxidizing prokaryotes (AOPs) and displaying 30.4- and 17.9-fold greater abundances than canonical Nitrospira representatives in water and sediments, respectively. Comammox Nitrospira contributed more to nitrifier abundances (34–87% of AOPs) in typical oligotrophic environments with a higher pH and lower temperature, particularly in the plateau (clade B), mountain and foothill (clade A) areas of the upper reach. The dominant position of planktonic comammox Nitrospira was replaced by canonical Nitrospira sublineages I/II and ammonia-oxidizing bacteria from the plateau to downstream plain due to environmental selection, while the dissimilarity of benthic comammox Nitrospira was moderately associated with geographic distance. A substantial decrease (83%) in benthic comammox Nitrospira abundance occurred immediately downstream of the Three Gorges Dam, consistent with a similarly considerable decrease in overall sediment bacterial taxa. Together, this study highlights the previously unrecognized dominance of comammox Nitrospira in major river systems and underlines the importance of revisiting the distributions of and controls on nitrification processes within global freshwater environments.

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Section: Introductionmentioning

confidence: 99%

Comammox Nitrospira within the Yangtze River continuum: community, biogeography, and ecological drivers

Chen

et al. 2020

The ISME Journal

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121

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“…resenting resource consumption is a measure of how much the required area of biologically productive land or water an individual, population, or activity requires the produce of all the consuming resources and to absorb the generated waste (Wang et al, 2020 andYang, 2019). Considering the inconsistent output and equilibrium of various types of land, the waterway area (A 1 ) and water-levelfluctuating zone area (A 2 ) are converted into ecologically productive land with unified units by multiplying the corresponding output factor (F 1 ) and equilibrium factor (F 2 ).…”

Section: Economic Efficiency Indexmentioning

confidence: 99%

“…To evaluate the effect of engineering projects on the ecosystem, the following six indices were considered: the fragmentation index (FI), wetland disconnectivity index (WDI), fraction of impervious surfaces (FIS), flow disruption index (FDI), fish richness index (FRI), and proportion of non-native fish (PNF). Using the ecological pressure index (EPI), Wang et al (2020) integrated these indices to better evaluate the engineering effects on the ecosystem.…”

Section: Ecological Pressure Indexmentioning

confidence: 99%

“…A sustainability evaluation system, a hierarchical model (Wang et al, 2020), for gold inland waterways has been introduced to assess the sustainability of waterways from Chongqing to Yibin in the upper Yangtze River considering three aspects: exploitation, EE, and ecological pressure. The sustainability of waterways is evaluated by virtue of the sustainability index (SI), which is deduced from the score of the exploitation ratio (S ER ), the score of the consistency index (S CI ), and the score of EEI and EPI (S EEI, EPI ):…”

Section: Sustainability Indexmentioning

confidence: 99%

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Impact assessment of waterway development on the socioeconomic conditions and ecosystem in the upper Yangtze River

et al. 2022

River Research & Apps

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The waterway from Chongqing to Yibin in the upper Yangtze River provides strong support for the socioeconomic development in Western China, while it also has a negative influence on the river ecosystem, such as river fragmentation, wetland disconnectivity, fish habitat, and biodiversity. Accurately characterizing the exploitation, economic efficiency, and ecological pressure of the waterway from Chongqing to Yibin is of great significance for the further development of the upper Yangtze River. In this study, based on statistical data from the National Bureau of Statistics of China, the waterway development, economic benefits, and ecological pressure of the waterway from Chongqing to Yibin were evaluated. The sustainability index (SI) was introduced to comprehensively assess the sustainability of waterways using the hierarchical model, which integrates the exploitation ratio (ER), economic efficiency index (EEI), and ecological pressure index (EPI). A relatively low ER (41.04%), a low consistency index (CI, 0.31), a high EEI (9037.18 USA$/gha), and a low EPI (0.33) yielded an SI of 0.70, indicating that the waterway from Chongqing to Yibin in the upper Yangtze River is in a sustainable development stage. Compared with the typical global Golden Inland Waterways, the waterway from Chongqing to Yibin still has great development potential under the prioritizing ecological protection.

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“…Inland waterways play an essential role in the global transportation system ( 1 ). In the construction and development of the Yangtze River Golden Waterway (YRGW), rock-socketed concrete-filled steel tube (RSCFST) pile has been widely used for its unique structure ( 2 ).…”

mentioning

confidence: 99%

Experimental Investigation into Cyclic Shear Behaviors in the Interface Between Steel and Crushed Mudstone Particles

Liang

Xia

Liu

et al. 2021

Transportation Research Record: Journal of the Transportation R

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In the waterway construction projects of the upper streams of the Yangtze River, crushed mudstone particles are widely used to backfill the foundations of the rock-socketed concrete-filled steel tube (RSCFST) pile. The mudstone particles are prone to being crushed, which influences the mechanical properties of the soil and the interface between the soil and the steel cased on the RSCFST pile. The crushing of the particles will be aggravated by reciprocating shear of the interface when the pile experiences repeating lateral loads. The reciprocating shear of the interface may, therefore, weaken the bearing capacity of the pile. In this study, we develop a new apparatus to study the mechanical properties of the steel–soil interface under a reciprocating shear condition. With this apparatus, a set of large-scale direct shear experiments are carried out with two different boundary conditions, that is, a constant stress boundary and a constant stiffness boundary, respectively. Comparative experiments and parallel experiments are carried out to study the physical properties of steel–mudstone particle interface and the stability of the apparatus. Parallel experiments show that the instrument has good stability. The comparative experiment results also reveal the differences of the shear behaviors of the interface under two conditions. Analysis of the experiment results shows that the normal stiffness condition is closer to the real boundary condition when the soil–steel interface is cyclically sheared. The particle crushing and the attenuation of normal stress is the main reason causing the degrading of the interface.

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Sustainability of global Golden Inland Waterways

Cited by 28 publications

References 44 publications

Comammox Nitrospira within the Yangtze River continuum: community, biogeography, and ecological drivers

Comammox Nitrospira within the Yangtze River continuum: community, biogeography, and ecological drivers

Impact assessment of waterway development on the socioeconomic conditions and ecosystem in the upper Yangtze River

Experimental Investigation into Cyclic Shear Behaviors in the Interface Between Steel and Crushed Mudstone Particles

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