Phosphorus fractions and adsorption characteristics of floodplain sediments in the lower reaches of the Hanjiang River, China

Tian, Jian-Ru; Zhou, Peijiang

doi:10.1007/s10661-007-9743-x

Cited by 10 publications

(5 citation statements)

References 17 publications

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“…On the other hand, in Varano lagoon, the results showed that as the proportion of fine particles increased, the amount of total phosphorus also increased, above all in response to point-source inputs (south-eastern side of the lagoon), indicating that fine particles had a stronger adsorption capacity for phosphorus and play an important role in determining the phosphorus content in sediments. Similar results have been also observed by other recent studies (Tian and Zhou 2008;Lukawska-Matuszewska and Bolalek 2008;Owens and Walling 2002;Selig 2003;Vermont et al 2002). On the basis of these observations (highlighted by PCA analysis also), a not marked but evident difference between the two lagoons was observed and supported by ANOSIM test that suggested a greater influence of external sources on sediment macronutrient distributions in Varano rather than in Lesina lagoon.…”

Section: Discussionsupporting

confidence: 90%

Comparative study based on sediment characteristics and macrobenthic communities in two Italian lagoons

Specchiulli

Renzi

Scirocco

et al. 2008

Environ Monit Assess

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The aims of this study were to analyse sediment characteristics and macrobenthic assemblages in two very close Italian coastal lagoons (Lesina and Varano) and to assess the different behaviour between the two basins and the relationship between sediment matrix and benthic organisms within and between the two lagoons. The comparative study was performed in July 2007 at 13 sampling sites in Lesina lagoon and 15 sites in Varano basin for sediment grain size, total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP) and macrobenthic structure analyses. Both lagoons were generally dominated by fine-grained sediments (clay and silt components). The average contents of TOC and TN measured in Lesina was higher than in Varano (3.31% vs 2.52% for TOC and 5,200 microg.g(-1) vs 3,713 microg.g(-1) for TN); in contrast, the TP was lower (540 microg.g(-1) vs 620 microg.g(-1)). Based on macrobenthic community patterns, the central zone in Varano lagoon and the eastern area in Lesina lagoon were characterised by the lowest abundance (168.7 ind.m(-2) and 503.2 ind.m(-2), respectively) and by the lowest number of species, as highlighted by the diversity indices (Shannon-Wiener, H' range was 0.47-1.45 for Lesina and 0.00-1.68 for Varano; Margalef species richness, d range was 0.00-1.67 for Lesina lagoon and 0.00-2.38 for Varano basin). Ordination diagrams suggested an influence of marine and freshwater inputs on the sediment distribution in Varano lagoon and on macrobenthic assemblages in Lesina lagoon.

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Section: Discussionsupporting

confidence: 90%

Comparative study based on sediment characteristics and macrobenthic communities in two Italian lagoons

Specchiulli

Renzi

Scirocco

et al. 2008

Environ Monit Assess

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“…In Swan Lake, TP concentrations in surface sediments were not high, ranging at 79–616 mg/kg, which were similar to the margin sediments in Yellow Sea , but lower than other estuarine and coastal sediments of China, such as the wetland of Yellow River Delta , and the estuarine sediments of Daliao River . The spatial distribution of sediment P is mainly related to anthropogenic inputs, sediment texture, hydrodynamic conditions, and the distribution of aquatic organisms . In Swan Lake, highest TP concentrations were observed at the NW corner and central area, the lowest at SE corner.…”

Section: Discussionmentioning

confidence: 86%

“…P sorption on the sediments is an important process that affects P transport between the sediments and overlying water. P sorption characteristics mainly depend on sediment composition, such as amorphous Fe and Al , organic matter (OM) , grain size , and carbonate . However, the dominant factor influencing P adsorption was different in various aquatic systems.…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Bioavailability and Release Potential Risk of the Sediments in the Coastal Wetland: A Case Study of Rongcheng Swan Lake, Shandong, China

Gao

Zhang

Shao

2013

CLEAN Soil Air Water

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Rongcheng Swan Lake, a natural coastal wetland, is connected to Rongcheng Bay of Yellow Sea, China. In this lagoon, water quality has deteriorated gradually in recent 30 years and filamentous Chaetomorpha linum have bloomed during the past five years. In present study, the concentration, fractions, and bioavailability of phosphorus (P) in surface sediments were investigated throughout the lake. In order to evaluate P retention ability of the wetland, six sediment samples from different lake regions were collected to study P adsortion kinetics, adsortion capacity and the relation to sediment properties. In Swan Lake, total P concentrations in sediments varied from 79 to 616 mg/kg, which were significantly higher in northwest region than those in southeast region. Sediment grain size and external inputs were the main factors affecting P distribution. Inorganic P concentration was obviously higher than that of organic P, and Ca-P was the important form in the sediments. Fe/Al-P showed a large spatial variation, with relatively high concentrations occurring at the northeastern corner and the western tip strongly affected by the discharge of wastewater. The adsorption isotherms were well fitted by Linear equation at low P conditions and by Langmuir equation at high initial P concentrations, respectively. The sediments in the northern and central lake had higher P adsorption capacity, while in southern lake the degree of P saturation of the sediments was high. Ammonium oxalate extractable Al, organic matter, and fine particle were important factors influencing P adsorption. In Swan Lake, algae available P (AAP) was the largest form of bioavailable P, followed by Olsen-P; moreover, AAP and Olsen-P showed significant correlations with Fe/Al-P. As a whole, TP concentration in sediments from Swan Lake was low, and the sediments at most regions had buffering ability for P in overlying water; while at the western tip of lake where macroalgal blooms frequently breakout, AAP concentration was relatively high and the sediments had higher potential for releasing P into water column.

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“…The published studies on the ecological environment related to this project have mainly focused on the area upstream of the Danjiangkou Dam, and there have been fewer studies on the middle and lower reaches ( Li et al, 2012 ). Published studies on the middle and lower reaches of the Hanjiang River have mainly focused on ecohydrological conditions, sediment regimes, characteristics of floodplain sediments, diatom blooms and other phenomena related to the changes in physical environment ( Tian and Zhou, 2008 ; Lu et al, 2012 ; Yang Q. et al, 2012 ; Wang et al, 2015 ). Compared to a single dam, the impact of cascade hydropower dam construction on watershed ecosystems is more serious owing to its multiple instances of obstruction and interception ( Rodríguez-Pérez et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Effects of South-to-North Water Diversion Project Cascade Dams on Riparian Vegetation Along the Middle and Lower Reaches of the Hanjiang River, China

Yang

et al. 2022

Front. Plant Sci.

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The influence of the construction of dams for water diversion on the ecological environment has attracted recent widespread attention. Over time, dams have emerged as one of the most important factors affecting the vegetation along the riparian zones of rivers. To elucidate the effects of cascade dams on riparian vegetation along the middle and lower reaches of the Hanjiang River, we examined riparian vegetation types upstream and downstream from dams. A total of 14 sample sites and 131 quadrats perpendicular to the river were investigated in June 2019, and 14 sample sites and 134 quadrats were investigated in October 2019. The riparian vegetation was divided into 15 (in June) and 11 (in October) vegetation types by two-way indicator species analysis (TWINSPAN). Significant differences were found between the vegetation types upstream and downstream of dams. Redundancy analysis (RDA) showed that soil moisture content, distance from the water, altitude and soil total nitrogen (TN) were the main environmental factors affecting plants distributions, and soil moisture content was the main factor affecting the zonal distribution of vegetation. By analyzing the impact of cascade dams on the hydrological regime, we found that the construction of cascade dams led to the differentiation of vegetation types upstream and downstream of the dam, and the riparian habitats were fragmented by these dams. This study provides both an important reference for the protection of riparian vegetation and riparian ecosystems and a basis for the management and restoration of river ecosystems after the construction of cascade dams.

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Phosphorus fractions and adsorption characteristics of floodplain sediments in the lower reaches of the Hanjiang River, China

Cited by 10 publications

References 17 publications

Comparative study based on sediment characteristics and macrobenthic communities in two Italian lagoons

Comparative study based on sediment characteristics and macrobenthic communities in two Italian lagoons

Phosphorus Bioavailability and Release Potential Risk of the Sediments in the Coastal Wetland: A Case Study of Rongcheng Swan Lake, Shandong, China

Effects of South-to-North Water Diversion Project Cascade Dams on Riparian Vegetation Along the Middle and Lower Reaches of the Hanjiang River, China

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