Spatio-temporal variation and coupling coordination relationship between urbanisation and habitat quality in the Grand Canal, China

Tang, Feng; Wang, Li; Guo, Yang; Fu, Meichen; Huang, Ni; Duan, Wenjun; Luo, Mingming; Zhang, Jianjun; Li, Wang; Song, Wei

doi:10.1016/j.landusepol.2022.106119

Cited by 77 publications

(55 citation statements)

References 56 publications

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“…The Grand Canal of China plays a great role in transportation, irrigation, flood diversion, drainage, water supply, and water transfer. Nowadays, the state of climate change is becoming more and more complex, and substantially affects the ecology of the Grand Canal [ 1 ]. Eukaryotic communities contribute to a vital ecological function by participating in many biological processes in river systems.…”

Section: Discussionmentioning

confidence: 99%

“…The Grand Canal of China is the largest artificial river in the world, stretching 1797 km long. It was dug manually, and so is a product of human transformation of the natural environment [ 1 ]. In addition to the fundamental ecological functions involving natural rivers, the Grand Canal plays an important role in transportation and recreational activities, and these human activities could cause environmental stress to the canal ecosystem [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, the understanding of how canal ecosystems respond to flooding is still in its infancy. Canals suffer more from human interference compared with natural rivers, and this is mainly due to the interference of hydraulic and biochemical factors brought by long-term navigation [ 1 , 2 ]. Characterizing the dynamics of eukaryotic community structures and their assembly patterns across canal environments, and responses to flood events will help us predict ecological changes in the canal systems as well as provide a basis for future environmental protection and ecological restoration measures in canals.…”

Section: Introductionmentioning

confidence: 99%

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Changes in Microeukaryotic Communities in the Grand Canal of China in Response to Floods

Cai

et al. 2022

IJERPH

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Floods are frequent natural disasters and could have serious impacts on aquatic environments. Eukaryotic communities in artificial canals influenced by floods remain largely unexplored. This study investigated the spatiotemporal variabilities among eukaryotes in response to floods in the Grand Canal, China. Generally, 781,078 sequence reads were obtained from 18S rRNA gene sequencing, with 304,721 and 476,357 sequence reads detected before and after flooding, respectively. Sediment samples collected after the floods exhibited a higher degree of richness and biodiversity but lower evenness than those before the floods. The eukaryotic communities changed from Fungi-dominated before floods to Stramenopile-dominated after floods. The spatial turnover of various species was the main contributor to the longitudinal construction of eukaryotes both before the floods (βSIM = 0.7054) and after the floods (βSIM = 0.6858). Some eukaryotic groups responded strongly to floods and might pose unpredictable risks to human health and environmental health. For example, Pezizomycetes, Catenulida, Glomeromycetes, Ellipura, etc. disappeared after the floods. Conversely, Lepocinclis, Synurale, Hibberdiales, Acineta, Diptera, and Rhinosporidium were all frequently detected after the floods, but not prior to the floods. Functional analyses revealed amino acid metabolism, carbohydrate metabolism, translation, and energy metabolism as the main metabolic pathways, predicting great potential for these processes in the Grand Canal.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Changes in Microeukaryotic Communities in the Grand Canal of China in Response to Floods

Cai

et al. 2022

IJERPH

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“…However, under challenges of global climate change and urbanization-induced human disturbance, riverine ecosystems are ranked as the most diverse and threatened ecosystem in the world [ 7 ]. With hydro-morphological and physico-chemical changes, most rivers, both in sparsely populated areas [ 8 ] and surrounded by densely populated regions, are inclined to habitat deterioration and river corridor disruption [ 9 , 10 ]. Habitat loss, fragmentation, and corridor interruption negatively impact on aquatic biodiversity, ecosystem structure, ecosystem function, ecosystem processes and services of freshwaters [ 11 , 12 , 13 , 14 ], which in turn influence the health of human beings [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Strategies for Restoring and Managing Ecological Corridors of Freshwater Ecosystem

Lin

Song

Zhang

et al. 2022

IJERPH

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Along with accelerating urbanization and associated anthropogenic disturbance, the structure and function of freshwater ecosystems worldwide are substantially damaged. To improve ecosystem health, and thus enhance the ecosystem security of the urban ecosystem, numbers of management approaches and engineering projects have been applied to mitigate the degradation of freshwaters. Nevertheless, there is still a lack of comprehensive and systematic research on the ecological corridor restoration of freshwater ecosystems; especially for Suzhou Grand Canal, one section of the world’s longest and ancient Grand Canal which is inclined to severe ecosystem degradation. Through investigating the adjacent land use characteristics, habitat quality, vegetation cover, instream water quality, and habitat composition, we aimed to: (i) assess the water quality of the Suzhou Grand Canal; (ii) evaluate the ecological characteristics of the canal ecosystem; (iii) develop strategic countermeasures to restore the ecological corridors for the mitigation of ecological problems. The results demonstrated: a large built area, a smaller ecological zone, a low habitat quality and habitat connectivity, and a high degree of habitat fragmentation within the canal corridor, also a simplified instream habitat composition, and greater nutrient and COD concentrations in the surface water—especially in the upstream and midstream canal. All urbanization-induced multiple stressors, such as land use changes, altered hydrology, and the simplified riparian zone et al., contributed synergistically to the degradation of the canal ecosystem. To alleviate the ecosystem deterioration, three aspects of recommendations were proposed: water pollution control, watershed ecosystem restoration, and ecological network construction. Basically, building a comprehensive watershed ecological network—on the basis of associated ecosystem restoration, and the connection of multi-dimensional ecological corridors—would dramatically increase the maintenance of aquatic–terrestrial system biodiversity, and improve the regional ecological security pattern and watershed resilience toward stochastic future disturbances. This study contributes to the understanding of the ecological challenges and related causes of the canal ecosystem. The integrated strategy introduced in this study provides policymakers, water resource managers, and planners with comprehensive guidelines to restore and manage the ecological corridor of the canal ecosystem. This can be used as a reference in freshwater ecosystems elsewhere, to improve ecosystem stability for supporting the sustainable development of urban ecosystems.

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“…His research indicates that the AHP method can provide stable results regarding the priority level of vulnerability and hazard in other regions with a coastal and settlement typology approach. In addition (Song & Li, 2020;Tanga et al, 2022) conducted research on patterns exploring the countryside in the Beijing region, which has undergone a dramatic transformation. The method used is a land transformation model using high military satellite imagery.…”

Section: Introductionmentioning

confidence: 99%

Distribution Patterns and Settlement Density Using Nearest Neighbor Analysis and Kernel Density Analysis in Diy Coastal Areas

Yusliana

Fitria

Antus

et al. 2022

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DIY's coastal area is one of DIY's development priorities by establishing the site as an economic corridor that impacts physical development, such as settlements in the coastal area of DIY. This study aims to analyze the distribution and density of settlements. The method used in research is a quantitative descriptive and Geography Information System approach. The analysis used in this study is Nearest Neighbour Analysis (NNA) and Kernel Density Analysis with an analysis tool in ArcGIS 10.5. The results of the NNA show that the three districts located on the coast of DIY have the same distribution pattern characteristics, namely, the clustered pattern, which means the NNA index value is <1 or the T value ranges from 0-0.80. The results of the kernel density analysis show that the most significant density is found in Kulon Progo Regency, precisely in Wates District, and Bantul Regency, precisely in Srandakan District. At the same time, for Gunung Kidul Regency, it is less significant, and the density is only centered on one density point. Several factors cause settlement density, including physical factors (topography, slope, soil type, and clean water sources), accessibility (proximity to transportation routes and proximity to the city center), availability of facilities and infrastructure (electricity network, educational facilities, and health), and environmental factors (natural and human resources).Keywords: Settlements, Coastal, NNA, Kernel Density

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Spatio-temporal variation and coupling coordination relationship between urbanisation and habitat quality in the Grand Canal, China

Cited by 77 publications

References 56 publications

Changes in Microeukaryotic Communities in the Grand Canal of China in Response to Floods

Changes in Microeukaryotic Communities in the Grand Canal of China in Response to Floods

Strategies for Restoring and Managing Ecological Corridors of Freshwater Ecosystem

Distribution Patterns and Settlement Density Using Nearest Neighbor Analysis and Kernel Density Analysis in Diy Coastal Areas

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