Influence of hydrology process on wetland landscape pattern: A case study in the Yellow River Delta

Li, Shengnan; Wang, Genxu; Deng, Wei; Hu, Yuanman; Hu, Weiwei

doi:10.1016/j.ecoleng.2009.07.009

Cited by 126 publications

(67 citation statements)

References 33 publications

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“…The evolution of the YRD is influenced by changes in river discharge, suspended sediment load, and changes of the river channel. Water flow and sedimentation from the Yellow River (YR) formed an important base for the extension and development of the YRD and its wetland landscape (Li et al 2009). The current course of the YR has resulted from the artificial change of the river course in 1976, followed by a shift towards the north bank of the Qingshuigou-course in 1996 (Cui, 2002).…”

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confidence: 99%

Analysis of macrobenthic assemblages and ecological health of Yellow River Delta, China, using AMBI & M-AMBI assessment method

Bouma

et al. 2017

Marine Pollution Bulletin

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a b s t r a c t a r t i c l e i n f oYellow River delta (YRD) is a typical example of a valuable coastal ecosystem that is under increasing anthropogenic threat in China. To understand the current health status of this region, three surveys in 2011 for the abiotic conditions and macrobenthic assemblages were performed. The concentration of trace metals were relatively low in the sediment at all sampling stations representing a good sediment quality. A total of 159 macrobenthic species were identified during the three surveys. ABC curves showed that the macrobenthic fauna at 8 sampling stations suffered disturbances from human activities. M-AMBI index indicates that the benthic ecological quality of YRD is currently still not in a good condition. Five trace metals, water temperature and depth were the main environmental variables affecting the distribution pattern of macrobenthic assemblages. Community succession has occurred over the past 60 years, as evidenced by changes of species composition, key species, distribution pattern and range.

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confidence: 99%

Analysis of macrobenthic assemblages and ecological health of Yellow River Delta, China, using AMBI & M-AMBI assessment method

Bouma

et al. 2017

Marine Pollution Bulletin

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“…Considerable siltation occurred in the reservoir after commissioning, with a total sediment trapping of 32.47 9 10 8 t from 1997 to 2007 (Peng et al 2010). The flow-sediment regulation scheme has greatly influenced wetland landscape patterns in the lower reach of the YR since 2002; As and Cd concentrations were significantly higher in both marsh soils after the regulation (Mitsch and Gosselink 2007;Bai et al 2012;Li et al 2009). This result is a major limiting factor of soil heavy metal mobilization and transformation in wetland ecosystems.…”

Section: Discussionmentioning

confidence: 99%

Comparison of arsenic and heavy metals contamination between existing wetlands and wetlands created by river diversion in the Yellow River estuary, China

et al. 2014

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Samples were collected at 71 sites in the Yellow River Delta Natural Reserve in December 2010 to represent soil conditions before and after the Yellow River (YR) diversion. The As, Cd, Cu, Pb, Zn, and Ni concentrations were measured to determine metal contamination levels. Results suggest that Cd concentrations were significantly higher after the YR diversion than before. The As, Cd, Cr, Cu, Ni, Pb, and Zn soil contamination indices did not exceed contamination levels, although the heavy metal content increased after the YR diversion. The mean concentrations of these heavy metals were lower than the Class I criteria. Correlation analysis shows significant correlations between As and Cr, Cu, Ni, Pb, and Zn concentrations both before and after the YR diversion. However, no significant correlations were observed between heavy metal concentration and pH before the diversion, and no heavy metal concentration was correlated with salinity. The principal component analysis indicates that these trace elements, including As, were closely correlated with each other and therefore likely originated from shared pollution sources before the diversion. These results are useful for assessing the heavy metal contamination and proposing feasible suggestions to improve soil quality.

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“…Meanwhile, the water demand for industry and resident life increased, which accelerated the crisis of the downstream ecological water resources. The annual flow of the Yellow River has decreased dramatically in the past decade, and the flow has a significant negative correlation with the temperature and positive correlation with precipitation [49,[86][87][88][89][90]. Climate change was a long-term critical impact factor on the reduction of flow.…”

Section: Climate Changementioning

confidence: 99%

“…The wetlands of the Yellow River Delta are not only important for protection of the eco-environmental system but also for internationally endangered bird species [22,49,50]. Generally, the modern Yellow River Delta is located from Wu Hao Zhuang (north) to Song Chun Rong Gou (south) (longitude 118.30~119.30° E, latitude 37.05~38.20° N) [51].…”

Section: Study Areamentioning

confidence: 99%

Four Decades of Estuarine Wetland Changes in the Yellow River Delta Based on Landsat Observations Between 1973 and 2013

Zhu

Zhang

Huang

2018

Water

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Yellow River Delta wetlands are essential for the migration of endangered birds and breeding. The wetlands, however, have been severely damaged during recent decades, partly due to the lack of wetland ecosystem protection by authorities. To have a better historical understanding of the spatio-temporal dynamics of the wetlands, this study aims to map and characterize patterns of the loss and degradation of wetlands in the Yellow River Delta using a time series of remotely sensed images (at nine points in time) based on object-based image analysis and knowledge transfer learning technology. Spatio-temporal analysis was conducted to document the long-term changes taking place in different wetlands over the four decades. The results showed that the Yellow River Delta wetlands have experienced significant changes between 1973 and 2013. The total area of wetlands has been reduced by 683.12 km 2 during the overall period and the trend of loss continues. However, the rates and trends of change for the different types of wetlands were not the same. The natural wetlands showed a statistically significant decrease in area during the overall period (36.04 km 2 ·year −1 ). Meanwhile, the artificial wetlands had the opposite trend and showed a statistically significant increase in area during the past four decades (18.96 km 2 ·year −1 ). According to the change characteristics revealed by the time series wetland classification maps, the evolution process of the Yellow River Delta wetlands could be divided into three stages: (1) From 1973From -1984, basically stable, but with little increase; (2) from 1984-1995, rapid loss; and (3) from 1995-2013, slow loss. The area of the wetlands reached a low point around 1995, and then with a little improvement, the regional wetlands entered a slow loss stage. It is believed that interference by human activities (e.g., urban construction, cropland creation, and oil exploitation) was the main reason for wetland degradation in the Yellow River Delta over the past four decades. Climate change also has long-term impacts on regional wetlands. In addition, due to the special geographical environment, the hydrological and sediment conditions and the location of the Yellow River mouth also have a significant influence on the evolution process of the wetlands.

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Influence of hydrology process on wetland landscape pattern: A case study in the Yellow River Delta

Cited by 126 publications

References 33 publications

Analysis of macrobenthic assemblages and ecological health of Yellow River Delta, China, using AMBI & M-AMBI assessment method

Analysis of macrobenthic assemblages and ecological health of Yellow River Delta, China, using AMBI & M-AMBI assessment method

Comparison of arsenic and heavy metals contamination between existing wetlands and wetlands created by river diversion in the Yellow River estuary, China

Four Decades of Estuarine Wetland Changes in the Yellow River Delta Based on Landsat Observations Between 1973 and 2013

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