Role of hydrological conditions on organic phosphorus forms and their availability in sediments from Poyang Lake, China

2015 ◽  
Vol 22 (13) ◽  
pp. 10116-10129 ◽  
Author(s):  
Zhaokui Ni ◽  
Shengrui Wang ◽  
Li Zhang ◽  
Zhiqiang Wu
Keyword(s):  
Poyang Lake ◽  
Organic Phosphorus ◽  
Hydrological Conditions ◽  
Phosphorus Forms

scholarly journals A study of the relationship between wetland vegetation communities and water regimes using a combined remote sensing and hydraulic modeling approach

2016 ◽  
Vol 47 (S1) ◽  
pp. 278-292 ◽  
Author(s):  
Tan Zhiqiang ◽  
Zhang Qi ◽  
Li Mengfan ◽  
Li Yunliang ◽  
Xu Xiuli ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Poyang Lake ◽  
Spatial Scales ◽  
Hydraulic Modeling ◽  
Wetland Vegetation ◽  
Vegetation Distribution ◽  
Vegetation Communities ◽  
Water Regimes ◽  
Hydrological Conditions ◽  
Hydrologic Condition

Hydrologic condition is a major driving force for wetland ecosystems. The influence of water regimes on vegetation distribution is of growing interest as wetlands are increasingly disturbed by climate change and intensive human activities. However, at large spatial scales, the linkage between water regimes and vegetation distribution remains poorly understood. In this study, vegetation communities in Poyang Lake wetland were classified from remote sensing imagery. Water regimes characterized by inundation duration (IDU), inundation depth (IDE), and inundation frequency were simulated using physics-based hydraulic models and were then linked with vegetation communities by a Gaussian regression model. The results showed that the Carex community was found to favor more hydrologic environments with longer IDU and deeper IDE in comparison to the Phragmites community. In addition, we found that the Carex community could survive in a relatively wider variety of hydrological conditions than the Phragmites community. For the typical sub-wetlands of the Poyang Lake National Nature Reserve (PLNNR), only the influence of IDU on the distribution of vegetation communities was significant. Outcomes of this research extend our knowledge of the dependence of wetland vegetation on hydrological conditions at larger spatial scales. The results provide practical information for ecosystem management.

Phosphorus forms and enzymatic hydrolyzability of organic phosphorus in soils after 30 years of organic and conventional farming

2012 ◽  
Vol 175 (3) ◽  
pp. 385-393 ◽  
Author(s):  
Martina Keller ◽  
Astrid Oberson ◽  
Kathrin E. Annaheim ◽  
Federica Tamburini ◽  
Paul Mäder ◽  
...  
Keyword(s):  
Organic Phosphorus ◽  
Conventional Farming ◽  
Phosphorus Forms ◽  
Organic And Conventional Farming

scholarly journals Spatiotemporal Variability in the Water Quality of Poyang Lake and Its Associated Responses to Hydrological Conditions

Water ◽  
2016 ◽  
Vol 8 (7) ◽  
pp. 296 ◽  
Author(s):  
Bing Li ◽  
Guishan Yang ◽  
Rongrong Wan ◽  
Yanhui Zhang ◽  
Xue Dai ◽  
...  
Keyword(s):  
Water Quality ◽  
Poyang Lake ◽  
Spatiotemporal Variability ◽  
Hydrological Conditions

scholarly journals Hydrologiczne uwarunkowania morfogenezy wybranych erozyjnych form rzeźby równi zalewowej na przykładzie doliny Bugu

2018 ◽  
Vol 27 (1) ◽  
pp. 57-70
Author(s):  
Piotr Ostrowski ◽  
Marta Utratna
Keyword(s):  
Flow Direction ◽  
Main Channel ◽  
River Valley ◽  
Oxbow Lakes ◽  
Hydrological Conditions ◽  
Ice Storms ◽  
Overbank Flow ◽  
The Relationship

The aim of the study was to analyze the relationship between hydrological conditions and morphogenesis of erosional landforms on the floodplain of the Bug river valley. It was found that forms such as side arms and oxbow lakes as a result of cyclical floods are subject to secondary erosion. The main reason for this phenomenon is the fact that they combine strings of overbank flow direction. In the case of ice storms, these forms take on the role of the main channel limiting the effects of floods.

scholarly journals The potential role of sediment organic phosphorus in algal growth in a low nutrient lake

2019 ◽  
Vol 255 ◽  
pp. 113235 ◽  
Author(s):  
Zhaokui Ni ◽  
Shengrui Wang ◽  
Jingjing Cai ◽  
Hong Li ◽  
Alan Jenkins ◽  
...  
Keyword(s):  
Potential Role ◽  
Organic Phosphorus ◽  
Algal Growth

Fractional Composition of Phosphorus Forms in Sediments Related to Release

1982 ◽  
Vol 14 (4-5) ◽  
pp. 215-226 ◽  
Author(s):  
H Furumai ◽  
S Ohgaki
Keyword(s):  
Fractional Composition ◽  
Organic Phosphorus ◽  
Aluminum Phosphate ◽  
Iron Phosphate ◽  
Phosphorus Release ◽  
Phosphorus Forms ◽  
P Fraction ◽  
Fractionation Method ◽  
Release Potential ◽  
Total Sediment

The relation between the fractional composition of phosphorus forms in sediment and phosphorus release was investigated experimentally using incubation bottles. The validity of the sediment phsophorus fractionation method developed in the field of soil science was examined and it proved to be successful for fractionation of pure phosphate compounds which were added to sediments. The iron and aluminum phosphate and adsorbed phosphorus were recovered in NaOH (lN) extractable ortho-phosphate (NaOH-o-P) fraction, calcium phosphate in HC1 (lN) extractable ortho-phosphate (HCl-o-P) fraction, and organic phosphorus in MaOH extractable total-phosphorus except for ortho-phosphate (NaOH-[T-o]-P) fraction and residual (Res.-P) fraction. This method was used to identify the form of phosphorus in sediments collected from a lake and a canal. NaOH-o-P fraction was the main phosphorus constituent in both sediments. The change in MaOH-o-P fraction accounted for most of the change in total sediment phosphorus. NaOH-o-P fraction in the sediment decreased during the period of incubation as the concentrations in the water increased but other fractions remained constant. The addition of iron phosphate and adsorbed phosphorus to the sediments promoted phosphorus release. Therefore, the changes in the fractional composition of the phosphorus forms indicated that NaOH-o-P fraction is the form of phosphorus which is most easily released under anaerobic condition. The amount of this fraction is the index of the phosphorus release potential of sediments.

Variation in Soil Phosphorus Forms in Larix olgensis Plantations in Eastern Montane Area of Northeast China

2012 ◽  
Vol 518-523 ◽  
pp. 4801-4805
Author(s):  
Li Xin Chen ◽  
Wen Biao Duan
Keyword(s):  
Rhizosphere Soil ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Inorganic Phosphorus ◽  
Field Investigation ◽  
Stand Age ◽  
Available Phosphorus ◽  
Larix Olgensis ◽  
Phosphorus Forms ◽  
Mature Stand

Variation in total phosphorus (TP), available phosphorus (AP), the forms of organic phosphorus (OP) and inorganic phosphorus (IP) in rhizosphere soil (RS) and non-rhizosphere soil (NRS) at different development stages in larch (Larix olgensis) plantations was quantitively studied through field investigation, chemical analysis and statistical test. The results indicated that: AP, O-P (occluded phosphate), TP, OP in RS exhibited a significantly or apparently decreased tendency over stand age, but IP, Ca-P (phosphate combined with calcium) and Fe-P (phosphate combined with Ferrum) in RS presented a significantly or apparently increased trend when stand age increased; Ca-P in NRS increased when stand age became larger; Fe-P in half-mature stand (HMS), AP and Fe-P in near mature stand (NMS), AP and Ca-P in mature stand (MS) in NRS was higher than in RS

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