Changes of nutrients and phytoplankton chlorophyll-a in a large shallow lake, Taihu, China: an 8-year investigation

Chen, Yuwei; Fan, Chengxin; Teubner, Katrin; Dokulil, Martin T.

doi:10.1023/b:hydr.0000008604.09751.01

Cited by 204 publications

(106 citation statements)

References 15 publications

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“…The opposite varieties can partly be explained by the change of external nutrient input. From early 1990's, the increased attention on water quality improvement has been accompanied by the eutrophication development in Taihu Lake (Zhu, 1996;Zhang and Wang, 2001;Chen and Fan, 2003). Accordingly investments and measures in pollution control have been enhanced more recently.…”

Section: Discussionmentioning

confidence: 99%

Exploration of relationships between phytoplankton biomass and related environmental variables using multivariate statistic analysis in a eutrophic shallow lake: A 5-year study

Wang

Lü

et al. 2007

Journal of Environmental Sciences

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Understanding the process of the changing phytoplankton patterns can be particularly useful in water quality improvement and management decisions. However, it is generally not easy to illustrate the interactions between phytoplankton biomass and related environmental variables given their high spatial and temporal heterogeneity. To elucidate relationships between them, in a eutrophic shallow lake, Taihu Lake, relative long-term data set of biotic and abiotic parameters of water quality in the lake were conducted using multivariate statistical analysis within seasonal periodicity. The results indicate that water temperature and total phosphorus (TP) played governing roles in phytoplankton dynamics in most seasons (i.e. temperature in winter, spring and summer; TP in spring, summer and autumn); COD (chemical oxygen demand) and BOD (biological oxygen demand) presented significant positive relationships with phytoplankton biomass in spring, summer and autumn. However, a complex interplay was found between phytoplankton biomass and nitrogen considering significant positive relationships occurring between them in spring and autumn, and conversely negative ones in summer. As the predatory factor, zooplankton presented significant grazing-pressure on phytoplankton biomass during summer in view of negative relationship between them in the season. Significant feedback effects of phytoplankton development were identified in summer and autumn in view that significant relationships were observed between phytoplankton biomass and pH, Trans (transparency of water) and DO. The results indicate that interactions between phytoplankton biomass and related environmental variables are highly sensitive to seasonal periodicity, which improves understanding of different roles of biotic and abiotic variables upon phytoplankton variability, and hence, advances management methods for eutrophic lakes.

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Section: Discussionmentioning

confidence: 99%

Exploration of relationships between phytoplankton biomass and related environmental variables using multivariate statistic analysis in a eutrophic shallow lake: A 5-year study

Wang

Lü

et al. 2007

Journal of Environmental Sciences

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“…It functions as a drinking water source, but also as a receiver of untreated domestic sewage (Chen et al, 2003). In 2002-2004, dredging was carried out to remove polluted sediment, using an IHC Holland suction hopper dredger (more details are given in the legend to Fig.…”

Section: Methodsmentioning

confidence: 99%

Phosphorus fractions and alkaline phosphatase activity in sediments of a large eutrophic Chinese lake (Lake Taihu)

et al. 2008

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Spatial, vertical, and seasonal variations in phosphorus fractions and in alkaline phosphatase activity (APA) were investigated in sediments in a large-shallow eutrophic Chinese lake (Lake Taihu) in [2003][2004]. The phosphorus content was highest in the most seriously polluted lake area. Iron-bound phosphorus (Fe(OOH)*P) dominated (47% on average) among the phosphorus fractions determined according to Golterman (Hydrobiologia 335:87-95, 1996). Notably, organically-bound P comprised a further significant additional portion (acid-soluble + hot NaOH-extractable organic P = 25%), which was highest at the most polluted sites. The Fe(OOH)*P content was the lowest in spring (April, 2004), suggesting that degradation of organic matter led to the release of iron-bound phosphates. Sediment APA showed a significant positive relationship with both organically-bound P and Fe(OOH)*P. Consequently, organically-bound P is an important portion of the sediment phosphorus in Lake Taihu. It is mainly derived from freshly-settled autochthonous particles and from external discharges. Organicallybound P induces APA and may lead to the release of bioavailable phosphates from the organic sediments, thereby accelerating lake eutrophication.

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“…However, the TSI-TP declined towards the end of the year, following an increase in rainfall, discharge and subsequent water levels in Lake Naivasha probably due to a dilution effect. A similar dilution effect has been observed in other lakes, such as Lake Taihu in China (Chen et al, 2003).…”

Section: Total Phosphorussupporting

confidence: 81%

Assessing water quality in lake Naivasha

Ndungu¹

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Changes of nutrients and phytoplankton chlorophyll-a in a large shallow lake, Taihu, China: an 8-year investigation

Cited by 204 publications

References 15 publications

Exploration of relationships between phytoplankton biomass and related environmental variables using multivariate statistic analysis in a eutrophic shallow lake: A 5-year study

Exploration of relationships between phytoplankton biomass and related environmental variables using multivariate statistic analysis in a eutrophic shallow lake: A 5-year study

Phosphorus fractions and alkaline phosphatase activity in sediments of a large eutrophic Chinese lake (Lake Taihu)

Assessing water quality in lake Naivasha

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