Particle-size distribution and phosphorus forms as a function of hydrological forcing in the Yellow River.

Samples were collected monthly from January to December in 2010, and daily observations were made during the water-sediment regulation event in June-July 2010. Sequential extractions were applied to determine the forms of P in different particle-size fractions and to assess the potential bioavailability of particulate phosphorus (PP). The results indicated that exchangeable phosphorus, organic phosphorus, authigenic phosphorus, and refractory phosphorus increased with the decreasing of particulate size; conversely, detrital phosphorus decreased with the decreasing of particulate size.

[Distribution characteristics of COD and DO and its influencing factors in the Daliaohe Estuary].

The concentrations of COD and DO were measured in the Daliaohe Estuary in April, July and November of 2010, and their distribution characteristics and influencing factors were discussed. The results showed that the concentrations of COD were 12.10, 4.

[Distribution of phosphorus in surface sediments from the Yellow River estuary wetland].

Surface sediments were collected from Yellow River estuary wetland. The distribution of phosphorus in sediments was analyzed with modified SEDEX. The results indicated that the contents of TP in surface sediments varied from 12.

[Mixing behavior of nutrients in different seasons at Liaohe Estuary].

The distribution and species of nutrients in the Daliaohe Estuary were studied in April, July and November, 2010. Concentrations of nutrients displayed obviously seasonal variability in the Daliaohe Estuary. Highest concentrations of PO4(3-) -P, DOP, DTP and TP were in April, and the lowest were in July.

[Research advances in the effects of environmental factors on the growth and development of Aurelia spp].

Aurelia spp. is a cosmopolitan coastal species, and also, one dominant species of large jellyfish in the coastal waters of China. In recent years, Aurelia spp.

[Composition of n-alkanes in soils of the Yellow River Estuary Wetlands and their potential as organic matter source indicators].

Abstract: Surface soil samples from the Yellow River Estuary Wetlands were analyzed for total organic carbon (TOC) and n-alkanes. Molecular indicators of n-alkanes were calculated and their potential as organic matter source indicators was discussed and compared among different sampling areas and times. C25-C33 n-alkanes with odd-to-even predominance were observed in most surface soils of the wetlands, suggesting the dominant contribution of terrestrial higher plants for the soil organic matter (SOM), and the ubiquitous presence of unresolved complex mixture indicated the presence of petroleum contamination.

[Forms and distributions of particulate phosphorus in the surface sediments of North Yellow Sea].

Surface sediments were collected from the North Yellow Sea in October 2007. The sediments were analyzed with modified SEDEX to obtain six forms of phosphorus. The results indicate that among the total phosphorus the detrital phosphorus and authigenic phosphorus are the main forms and the content varies from 25.

[Phosphorus forms of the suspended particulate matter in the Yellow River downstream during water and sediment regulation 2008].

Suspended particulate matter samples were collected from Lijin Station on the Yellow River during the 2008 water and sediment regulation. Using water elutriation method, samples were physically separated according to grain size, and phosphorus forms were detected by the improved SEDEX technology. Results show that authigenic apatite phosphorus and organic phosphorus are the dominant forms of the particulate phosphorus.

[Distributions of dissolved inorganic mercury in the lower part of the Three Gorges Reservoir].

One year after the first filling stage of the Three Gorges Reservoir(TGR), dissolved inorganic mercury (Hg(DI)) was measured in August 2004. Concentration of Hg(DI) varied from undetection to 82.6 ng x L(-1) with average of 22.