Structure equation model-based approach for determining lake nutrient standards in Yungui Plateau ecoregion and Eastern Plain ecoregion lakes, China

Ji, Danfeng; Xi, Beidou; Su, Jing; Huo, Shouliang; Ji, Wang; Gong, Fangfang; Li, Mingxiao; Jia, Xuan; Wei, Daichun

doi:10.1007/s12665-014-3212-y

Cited by 7 publications

(7 citation statements)

References 20 publications

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“…The result showed that the calculated sedimentary TC values before the 1980s were higher than measured ones, giving a solider evidence for the sudden increase in carbon deposition probably caused by primary production developing (e.g. more algal blooms), suggesting increased eutrophication after the 1980s (Le et al 2010) which were probably attributed to human activities, considering Taihu a shallow lake in the eastern plain of China with dense river networks and nutrient frequently exchanging (Ji et al 2014). hundred) over the last century, except that in the sediment at 7N increasing all the time in the last 50 years from 726 to 904 mg kg -1 .…”

Section: Resultsmentioning

confidence: 86%

“…The traditional view of the eutrophication process in freshwater is that increased amount of phosphorus and nitrogen in water stimulate aquatic primary production (Clarke et al 2006) and the P and N thresholds for eutrophication were hard to determine, always by large-scale surveys and comparing them with reference values under natural conditions undisturbed by human activities (Gulati et al 2007;Ji et al 2014). However, archived data of pro-eutrophication periods, especially from before the 1970s are always rare or in lack of validation due to poor quality assurance (Clarke et al 2006;Le et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…In the whole Taihu, the eutrophication problem has been increasingly serious due to the rapid development of industry and agriculture all around (Duan et al 2009;Ji et al 2014) since the 1980s, with increasing coverage, duration and frequency of algal blooms in the last decades (Duan et al 2009(Duan et al , 2015, even though extensive efforts were made to reduce nutrient pollution emission and to improve catchment conditions in the last few years (Duan et al 2015;Di et al 2015). As a typical shallow lake, Taihu has sediment of 1632 km 2 as an original pool for P and N (Qin et al 2004).…”

Section: Introductionmentioning

confidence: 99%

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Using sedimentary phosphorus/nitrogen as indicators of shallow lake eutrophication: concentrations or accumulation fluxes

Zhang

Shan

2015

Environ Earth Sci

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Inland lakes have been suffering from eutrophication and nutrient sedimentation plays an important role in the eutrophication history of shallow lakes. Sedimentation processes and accumulation fluxes of nutrients were studied in the Central Lake zone (CL) of Taihu Lake (Taihu), a large shallow lake in China, with multisampling by the 210 Pb dating method and determination of sediment mass accumulation rates (MARs) and sedimentary phosphorus, nitrogen, carbon and iron concentrations, in order to track the anthropogenic eutrophication history of Taihu and to explore the available sedimentary indicators of trophic states of shallow lakes. It was found that MARs in CL varied from 0.016-0.048 to 0.078-0.339 g cm -2 a -1 with a turning point in 1980, corresponding to the rapid developing trend of society and economy in Taihu Basin after 1980. Rather than sedimentary nutrient concentrations, nutrient accumulation fluxes increased by 0.6-7.1-fold (P) and 2.3-12.2-fold (N) acting as paleolimnological indicators for the eutrophication explosion of Taihu since 1980. Yearly elevated TN in sediment cores and more greatly increased N accumulation fluxes than P with 350-1906 t a -1 in recent years (2009)(2010)(2011)(2012), suggest that nitrogen should get more attention to control for eutrophication risk of Taihu in future. There were spatial differences in nutrient accumulation fluxes and in weights of MARs and sedimentary nutrient concentrations contributing to the nutrient accumulation fluxes in CL. TOC in modern sediment (\1 m), responsible for increments in sedimentary P/Fe and TN and nutrient accumulation fluxes, acts as a key factor for controlling nutrient sedimentation and needs studies further for nutrient mass balance theory in Taihu.

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Section: Resultsmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Using sedimentary phosphorus/nitrogen as indicators of shallow lake eutrophication: concentrations or accumulation fluxes

Zhang

Shan

2015

Environ Earth Sci

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“…Predicting harmful algal blooms are particularly challenging in large shallow lakes such as the Lake Taihu due to their complex mixing patterns (Huang et al 2014a). Ji et al (2014) developed an approach for determining lake nutrient standards in different regions of China (Yungui Plateau ecoregion and Eastern Plain ecoregion lakes, Taihu). The most predictive indicator was found to be total phosphorus (TP).…”

Section: Lakes In China-taihumentioning

confidence: 99%

Thematic Issue: Water of the Taihu Lake

Sun

et al. 2015

Environ Earth Sci

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“…The water quality issue includes nutrients (Ji et al 2014;Wu et al 2013) and phosphorus (Chen et al 2014;Yuan et al 2014;Zhu et al 2013;Liu and Chang 2013;Marjore et al 2013).…”

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confidence: 99%