Effect of ecological engineering on the nutrient content of surface sediments in Lake Taihu, China

Gao, Yongxia; Zhu, Guangwei; Qin, Boqiang; Pang, Yong; Gong, Zhijun; Zhang, Yunlin

doi:10.1016/j.ecoleng.2008.07.002

Cited by 15 publications

(4 citation statements)

References 28 publications

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“…However, nutrient-rich sediment may be another contributory factor [18,19]. Excessive nutrients in the sediment may facilitate nutrient accumulation in submerged macrophyte tissue, which, when in excess, may lead to decreased macrophyte growth [20].…”

Section: Introductionmentioning

confidence: 99%

Response of Vallisneria natans to Increasing Nitrogen Loading Depends on Sediment Nutrient Characteristics

Jin

et al. 2016

Water

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High nitrogen (N) loading may contribute to recession of submerged macrophytes in shallow lakes; yet, its influences vary depending on environmental conditions. In August 2013, we conducted a 28-day factorial-designed field mesocosm experiment in Lake Taihu at the Taihu Laboratory for Lake Ecosystem Research (TLLER) to examine the effects of high N loading on the growth of Vallisneria natans in systems with contrasting sediment types. We ran the experiments with two levels of nutrient loading-present-day external nutrient loading (average P: 5 µg·L −1 ·day −1 , N: 130 µg·L −1 ·day −1 ) and P: 5 µg·L −1 ·day −1 , and with three times higher N loading (N: 390 µg·L −1 ·day −1 ) and used sediment with two contrasting nutrient levels. V. natans growth decreased significantly with increasing N loading, the effect being dependent, however, on the nutrient status of the sediment. In low nutrient sediment, relative growth rates, leaf biomass and root biomass decreased by 11.9%, 18.2% and 23.3%, respectively, at high rather than low N loading, while the decline was larger (44.0%, 32.7% and 41.8%, respectively) when using high nutrient sediment. The larger effect in the nutrient-rich sediment may reflect an observed higher shading of phytoplankton and excess nutrient accumulation in plant tissue, though potential toxic effects of the high-nutrient sediment may also have contributed. Our study confirms the occurrence of a negative effect of increasing N loading on submerged plant growth in shallow nutrient-enriched lakes and further shows that this effect is augmented when the plants grow in nutrient-rich sediment. External N control may, therefore, help to protect or restore submerged macrophytes, especially when the sediment is enriched with nutrients and organic matter.

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Section: Introductionmentioning

confidence: 99%

Response of Vallisneria natans to Increasing Nitrogen Loading Depends on Sediment Nutrient Characteristics

Jin

et al. 2016

Water

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“…Macrophyte restoration alone is likely not going to be a successful management method for eutrophic lakes. There are indications that if a lake is managed to reduce nutrient levels, macrophyte restoration may be successful to help the lake ecosystem reach a stable-state [36] [86]. Improved understanding of appropriate macrophyte species to select for restoration on a whole lake scale will be very beneficial in improving this as a management strategy.…”

Section: Biological Methodsmentioning

confidence: 99%

“…An ecological engineering approach was employed in Lake Taihu, to utilize both physical and biological strategies to reduce eutrophic conditions in the lake [36]. An enclosure was set up and concrete pilings were built along with the enclosure to help reduce wave power to decrease sediment resuspension [15].…”

Section: Biological Methodsmentioning

confidence: 99%

Sustainable Management of Eutrophic Lakes and Reservoirs

Wagner¹,

Erickson²

2017

JEP

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Eutrophication of lakes and reservoirs is a major water quality problem that poses significant environmental, economic and social threats around the world. Monitoring and managing lakes and reservoirs to prevent or limit eutrophication, therefore, has significant value. The literature has been reviewed to study ecological engineering and management methods that have been and can be applied to improve water quality. Ecological engineering has the potential to be utilized to improve the design and operation of lakes and reservoirs through monitoring and active management of biological, chemical and physical components. Phosphorus concentrations can be reduced by effective and sustainable management practices to improve water quality.

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“…Therefore, for the planning and management of regional water resources, it is extremely important to systematically analyze the impacts of socioeconomic water usage on the water environment and ecosystem, particularly in shallow lakes. Overall, shallow lakes are mostly located in densely populated areas, and are more likely to be disturbed by excessive human activities (Gao et al, 2009;Huang and Liu, 2009;Matt et al, 2014;La et al, 2013). Compared to deep lakes, they have more vulnerable ecosystems; not only its ecosystem services but also its balance of water supply and demand are more susceptible to be disturbed.…”

Section: Introductionmentioning

confidence: 97%

System dynamics modeling of the influence of the TN/TP concentrations in socioeconomic water on NDVI in shallow lakes

Zhu

Wang

Zhang

et al. 2015

Ecological Engineering

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Effect of ecological engineering on the nutrient content of surface sediments in Lake Taihu, China

Cited by 15 publications

References 28 publications

Response of Vallisneria natans to Increasing Nitrogen Loading Depends on Sediment Nutrient Characteristics

Response of Vallisneria natans to Increasing Nitrogen Loading Depends on Sediment Nutrient Characteristics

Sustainable Management of Eutrophic Lakes and Reservoirs

System dynamics modeling of the influence of the TN/TP concentrations in socioeconomic water on NDVI in shallow lakes

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