Effect of algal blooms outbreak and decline on phosphorus migration in Lake Taihu, China

Wang, Jiehua; Zhou, Yunkai; Bai, Xin; Li, Wenchao

doi:10.1016/j.envpol.2021.118761

Cited by 40 publications

(16 citation statements)

References 46 publications

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“…In general, the levels of human disturbances in agricultural and industrial areas decreased to a certain extent, while those in urban areas of the inland plain increased substantially (Figure 6). The intensity of human disturbances decreased in the Huaihe river Basin (Figure 8), which might be due to the overall influences of improved management efficiency and pollution control capacity in the study area (12,17). The intensities and spatial distributions of human disturbances are closely related to the urbanization process, as well as to the intensity of resource exploitation and utilization in the Huaihe river Basin.…”

Section: Dynamics Of Human Disturbancesmentioning

confidence: 96%

“…Indeed, the increase in human activities through the rapid growth of population and urbanization has gradually become an important driving factor affecting the ecological environment on a global scale (4)(5)(6)(7). According to previous studies, over 75 and 90% of the earth's land surface and riverine systems, respectively, have been altered as a result of human activities (8)(9)(10)(11)(12), resulting in a series of eco-environmental problems, such as global warming, water pollution, and land degradation (13)(14)(15). The influence of human activities on the environment resulted in a high ecological risk, thereby threatening human survival (16,17).…”

Section: Introductionmentioning

confidence: 99%

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A novel method for quantifying human disturbances: A case study of Huaihe River Basin, China

Wang

Zhang²,

Wang³

et al. 2023

Front. Public Health

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Human disturbances have become the main factors affecting the ecological environment. Therefore, evaluating the intensity of human disturbances is of great significance for ensuring effective regional conservation and ecosystem management. In this study, we constructed a novel method to quantify human disturbances based on three components of human disturbances into three types, namely naturalness transformation, natural resource consumption, and pollutant emissions. These components were quantified using the land use naturalness index (LNI), resource consumption index (RCI), and pollution emission index (PEI). Based on these three indicators, the human disturbances index (HDI) was calculated to reflect the intensity of human disturbances. In addition, remote sensing (RS), geographic information system (GIS), and multisource data were combined in the HDI method, taking into account the temporal variability of input parameters to achieve more convenient and comprehensive dynamic monitoring and evaluation of human disturbances. The applicability and effectiveness of the HDI method were assessed in the Huaihe River Basin, China. The obtained results revealed an increase and decrease in the intensities of human disturbances in the Huaihe River Basin from 1990 to 2005 and from 2010 to 2018, respectively. In addition, areas with a high level of human disturbances in the 1990–2005 period were mainly concentrated in the agricultural and industrial areas, while those in the 2010–2018 period were mainly observed in urban areas. This change was mainly due to a decrease in the pollutant emission amounts from agricultural and industrial lands and a marked increase in resource consumption in urban areas. This study provides theoretical guidance for regional conservation in the Huaihe River Basin and a new method for quantifying human disturbances.

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Section: Dynamics Of Human Disturbancesmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

A novel method for quantifying human disturbances: A case study of Huaihe River Basin, China

Wang

Zhang²,

Wang³

et al. 2023

Front. Public Health

Self Cite

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“…Potentially, a transient micronutrient enrichment supplied by a volcanic ash resulted in intense bacteria and algae blooms in Lake Messel as well. Such blooms significantly enhance the diffusive fluxes of soluble reactive phosphate and iron from sediment pore water to the overlying water (Chen et al 2018;Wang et al 2022). While an increased pH value of the water column and upper sediment layer promotes the desorption of phosphate from mineral surfaces (Gao et al 2014), anoxic conditions at the sediment-water interface cause the reductive dissolution of iron oxide minerals and the coupled release of iron and surface-bound P into pore water (Smith et al 2011;Cosmidis et al 2014).…”

Section: Sources Of Phosphatementioning

confidence: 99%

“…The decomposition of algae during or after an algae bloom results in the release of P from degraded algal cells and re-release to the sediment and overlying water (Wang et al 2022). Settling tephra particles in Lake Messel could also have adsorbed P from the water column and contribute significantly to the synsedimentary, exceptional P accumulation in the sediment within and adjacent to the later marker horizon.…”

Section: Sources Of Phosphatementioning

confidence: 99%

Lithogenesis of a phosphatized tephra marker horizon in the Eocene Messel maar lake

Liesegang

Wuttke

2022

Int J Earth Sci (Geol Rundsch)

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The bituminous black pelite of the Messel UNESCO world heritage site is an exceptional palaeobiological archive from the Middle Eocene greenhouse climate. The pronounced homogeneity of the annually laminated pelite through a time interval of 640 kyr complicates the relative stratigraphic classification of fossil remains and is, thus, largely dependent on particular marker horizons within the uniform sedimentary column. We analyzed the most prominent marker horizon M using petrographic microscopy, X-ray powder diffraction, and electron probe microanalyses to identify and characterize its structure and phosphate-dominated mineralogy. Based on our analytical data, we suggest that this phosphatic marker horizon resulted from the exceptional combination of external tephra enclosed in bacteria and algae-rich layers, producing a coupled phosphorus and cation diffusion during diagenesis. Mantienneite (KMg2Al2Ti(PO4)4(OH)3 • 15H2O) is documented for the first time in the Messel fossil deposit. The diagenetic succession of messelite, montgomeryite, and mantienneite precipitation reflects the internal heterogeneities in primary mineral composition of an ash layer. Kerogen maturation and hydrocarbon migration produced acidic, reducing pore fluids with high P concentration, which enhanced the mobility of Al and Ti. The mantienneite-forming reaction marks the change from a regime of reducing to oxidizing conditions. With the deposition and diagenesis of the marker horizon M, a singular event is preserved in a sedimentary sequence otherwise regarded as largely uniform over a time span of about 640 kyr.

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“…Moreover, wet and dry deposition in recent years has become an important contributor to the watershed in many parts of the world, particularly nitrogen by wet deposition [ 16 , 17 ]. P in the watershed mainly enters the soil through fertilization [ 18 ], and then part of the solution in the soil enters the plant through plant absorption, forming biologically bound organic P. Another part of the phosphate solution in the soil can be transformed between the adsorbed and free state by over-adsorption and desorption [ 19 , 20 ]. In all the processes of migration and transformation of soil P, P can be leached into groundwater or merged into surface water with surface runoff [ 21 ].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Rainfall on Aquatic Nitrogen and Phosphorus in a Semi-Humid Area Catchment, Northern China

Shou

Tian

Zeng

et al. 2022

IJERPH

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The impact of rainfall on water quality may be more important in semi-arid regions, where rainfall is concentrated over a couple of months. To explore the impact of rainfall changes on water quality, e.g., nitrogen (TN) and phosphorous (TP), the diversion from Luan River to Tianjin Watershed in the northern semi-humid area was selected as the study area. TN and TP concentrations in rivers and the Yuqiao Reservoir during the three-year high-flow season (2019–2021) were analyzed. The response relationship and influencing factors among the watershed’s biogeochemical process, rainfall, and water quality were clarified. The results showed that rainfall in the high flow season mainly controlled the river flow. The concentration of TN and TP in the inflow rivers is regulated by rainfall/flow, while the concentration of TN and TP in the water diversion river has different variation characteristics in the water diversion period and other periods. The lowest annual concentrations of TN and TP were observed in the normal year, while the highest annual concentration was observed in the wet year, indicating that the hydrological process drove the nutrient transport in the watershed. For the tributaries, the Li River catchment contributed a large amount of N and P to the aquatic environment. For the reservoir, the extreme TN concentrations were the same as the tributaries, while the extremes of TP concentrations decreased from the dry year to wet year, which was in contrast to the tributaries. The spatial variation of TN and TP concentrations in the reservoir showed that the concentration decreased following the flow direction from the river estuary to the reservoir outlet. Considering climate change, with the increase of rainfall in North China in the future, the TN and TP transport fluxes in the watershed may continue to increase, leading to the nitrogen and phosphorus load of the downstream reservoir. To ensure the impact of the increase of potential N and P output fluxes in the watershed on the water quality of the reservoir area, it is necessary to strengthen the effective prevention and control of non-point source pollution in the watershed.

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Effect of algal blooms outbreak and decline on phosphorus migration in Lake Taihu, China

Cited by 40 publications

References 46 publications

A novel method for quantifying human disturbances: A case study of Huaihe River Basin, China

A novel method for quantifying human disturbances: A case study of Huaihe River Basin, China

Lithogenesis of a phosphatized tephra marker horizon in the Eocene Messel maar lake

The Effect of Rainfall on Aquatic Nitrogen and Phosphorus in a Semi-Humid Area Catchment, Northern China

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