Biological and chemical factors influencing shallow lake eutrophication: a long-term study

Lau, Sam S. S.; Lane, Stuart N.

doi:10.1016/s0048-9697(01)00957-3

Cited by 104 publications

(45 citation statements)

References 22 publications

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“…It could identify new, smaller set of uncorrelated variables that accounted for a large proportion of the total variance in the original variables (Ludwig and Reynolds, 1988;Lau and Lane, 2002;Bernard et al, 2004). For interpretation purposes, the two most significant factor axes were portrayed as plots.…”

Section: Data Preparation and Statistical Analysismentioning

confidence: 99%

“…Momen et al (1996) employed cluster and discriminant analysis to characterize the trophic classification of lakes in New York. Lau and Lane (2002) studied the governing role of nutrients and zooplankton upon phytoplankton variation by applying factor analysis in Barton Broad (UK). George and Arhonditsis (2004) used principal component and timeseries analysis to explore the patterns and mechanisms of phytoplankton variability in Lake Washington (USA).…”

Section: Introductionmentioning

confidence: 99%

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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: Data Preparation and Statistical Analysismentioning

confidence: 99%

Section: Introductionmentioning

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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“…Temperature is one of important environmental factor for directly related with the functioning of an aquatic ecosystem Khan 2008, 2009b;Lau and Lane 2002;Shen 2002). Temperature is recognized as an important environmental factor in aquatic ecosystems as it regulates all the biological activities like metabolism, growth, development and reproduction.…”

Section: Discussionmentioning

confidence: 99%

Seasonal dynamics in the trophic status of water, floral and faunal density along some selected coastal areas of the Red Sea, Tabuk, Saudi Arabia

et al. 2015

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Eutrophication is posing a threat to the coastal marine ecosystems. The consequence of anthropogenic induced eutrophication of waters has resulted in severe deterioration of surface waters. In this research a preliminary data was collected on eutrophication by environmental monitoring on some selected coastal areas of the Red Sea near Tabuk, Saudi Arabia. Sampling sites were selected from Haql, Sharmaa and Duba (five for each station) and water samples collected in four different seasons (Oct 2013, Jan 2014, April 2014 and July 2014) to study seasonal dynamics of water quality parameters (especially in reference to the trophic status of water). Only one coastal site from each station was found with some eutrophic characteristics. Water samples collected from these eutrophic sites were more alkaline, turbid, with higher nutrient and low dissolved oxygen contents as compared to other sampling sites. Dynamics in relative densities of coastal flora and fauna were also found to be related with coastal water quality. Human settlements, fish markets, boating clubs and tourisms near these coastal areas of the Red Sea were observed as the primary causes of nutrient loading; run-offs during rains carrying nutrients also aggravate the problem. The results of this study may help in estimating the intensity of the problem and as a forecast for time frame to take an action for the conservation of affected coastal marine ecosystems and restoration of degraded coastal areas of the Red Sea.

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“…Non-normality of the data was treated by taking a logarithm or square root, whenever appropriate (Ludwig and Reynolds 1988). PCA was useful for considering several related random environmental variables simultaneously, and so identifying a new, small set of uncorrelated variables that accounted for a large proportion of the total variance in the original variables (Reyment and Joreskog 1993;Lau and Lane 2002;Maria and Graca 2006). Any factor with an eigenvalue greater than unity (eigenvalue > 1) was selected as significant.…”

Section: Data Preparation and Analysismentioning

confidence: 99%

Effects of anthropogenic activities on chemical contamination within the Grand Canal, China

Wang¹,

Han²,

Xu³

et al. 2010

Environ Monit Assess

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Contamination of nutrients and heavy metals within aquatic system is of great concern due to its potential impact on human and animal health. The Grand Canal of China, the largest artificial river in the world, is of great importance in supplying water resource, transporting cargo, and recreating resident, as well as great historical heritage. This study assessed and examined the impact of human activities on characters of contamination distribution within the section of the Canal in Taihu watershed. Physicochemical parameters of surface water quality were determined monthly from the year 2004 to 2006 at

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Biological and chemical factors influencing shallow lake eutrophication: a long-term study

Cited by 104 publications

References 22 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

Seasonal dynamics in the trophic status of water, floral and faunal density along some selected coastal areas of the Red Sea, Tabuk, Saudi Arabia

Effects of anthropogenic activities on chemical contamination within the Grand Canal, China

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