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Intertidal its complicated natural conditions, the distinctive regional characteristics, environmental cleanup and mitigation functions and rich natural resources, much attention of scholars at home and abroad. Matter and energy in the intertidal aggregation and release process, intertidal Earth (surface) a major cross-section of the circulation and flow of matter and energy, to study the cross section of the flow of matter and energy, and understanding of the entire material circulation and energy flow of the Earth system have a significant and far-reaching significance. Nutrients as a source of food for the primary producers of intertidal ecosystems, distribution, change and transport flux is not only a direct impact on marine productivity and changes in resources, but also reflect the situation of the level of pollution of the marine environment, ecological changes its The study of the distribution and change of the basis of the marine ecology, environment and fisheries resources research. Of the study area, the Yellow River Delta is a typical intertidal zone, with the tide and subtidal distance, approximately 3km, more significant tidal influence, with the ebb tide, sediment - water - gas-phase cycle sexual interaction, the study of the region nutrient distribution and flux of great significance to reveal the biogeochemical cycles of biogenic substances in the complex ecosystem of multi-media, multi-interface and multi-material interaction. The analysis concluded correctly predict the regional primary and secondary productivity of the main parameters to provide a theoretical basis for the rational use and sustainable development of the intertidal zone. To explore the intertidal region nutrients distribution and transport properties, in July 2007 in the Dongying Yellow River Delta in the intertidal zone were on-site investigation, collected and analyzed the overlying water and pore water dissolved inorganic nitrate nitrogen (NO3-N) , ammonia nitrogen (NH4-N), nitrite (NO2-N), phosphate (PO4-P), silicate (SiO3-Si), and dissolved total nitrogen (DTN), and total phosphorus content (DTP). The results show that: the intertidal zone in water NH4-N and NO2-N concentration range 0-80μmol / L and 0-24μmol / L, with an average concentration of 30 micromol / L and 10 micromol / L, are inshore to sea, and from south to north gradually reduced; NO3-N concentration range of 10-50 micromol / L, the average concentration of 30 micromol / L, decreasing from near-shore to the sea from north to south; PO4-P concentration in the 0-0.12μmol / L, with an average concentration of 0.04μmol / L, reduce the overall concentration gradually from south to north. The the intertidal interstitial water NH4-N concentration range of 120-180μmol / L, the average concentration of 140μmol / L; NO2-N concentration range of 0-16μmol / L, the average concentration of micromol / L, from the southwest near-shore the high values ??decreased in the offshore direction; NO3-N concentration range of 2-24μmol / L, the average concentration of 10 micromol / L, in addition to the low value area near the shore, the concentration of the region as a whole changed little; PO4-P concentration changes in the range of 0.1-1.5μmol / L, the average concentration of 0.3 micromol / L, to other regions decreased by two high-value areas of the northwest and southeast; SiO3-Si concentration range of 30-80μmol / L, the average concentration of 50 micromol / L; decreased from inshore to offshore direction. Explore the intertidal zone of regional sediment nutrient transport direction, the sediment cores laboratory leaching experiment, the results showed that: DTN and DTP concentration at low tide by the sediment surface to the bottom increments at low tide and high tide DTN inverting and DTP concentration changes. Calculated according to the stoichiometric limit to this article proceeds of pore water nutrients and benthic chlorophyll a content of the basic data, the potential role of nutritional factors on the growth of benthic algae are as follows: P and Si are likely to be in the region of benthic algae growth and reproduction limiting factor, where P is the primary impact factor. To explore the intertidal region nutrients Temporal and spatial changes and transport flux, in September 2007, April 2008 and July 2008 in the south of the Yellow River Delta in the intertidal zone set of three 15-hour continuous station, monitoring dissolved inorganic state of nitrate nitrogen (N03-N), ammonia (NH4-N), nitrite (NO2-N), phosphate (PO4-P), silicate (SiO3-Si) and dissolved total nitrogen (DTN) and total The content of phosphorus (DTP). The results show that: the concentration range 27.55-88.53μmol / L ((average 57.79μmol / L) ,96.00-249 .75 μmol / L (average 168.65μmol / L) and 92.97-265.33μmol, autumn, spring and summer DTN / L (average 173.00μmol / L); DIN concentration range of 8.86-85.82μmol / L (average 34.93μmol / L) ,70.56-235 .09 mmol / L (average 140.74μmol / L) and 64.08-152.17μmol, / L (average 101.12μmol / L); DTP concentration ranges were 0.22-3.14μmol / L (average of 1.05μmol / L) ,1.04-5 .27 μmol / L (average of 2.41μmol / L) and 1.40-8.03 micromol / L (average 4.60μmol / L); the DIP concentration ranges were 0.03-0.67μmol / L (average of 0.21μmol / L) ,0.12-0 .83 μmol / L (average 0.45μmol / L) and 1.12- 5.31μmol / L (average of 2.52μmol / L); autumn and summer DISI concentration ranges were 5.78-21.19μmol / L (average 13.97μmol / L) and 79.84-310.44μmol / L (average 119.43μmol / L ). the intertidal belt area N mainly from land-based sources of input; the autumn voyage of investigation showed that the regional DIP and DTP also with terrestrial input related, and the voyage in spring and summer voyage of the survey show that the tide in the region with P mainly from the water on the sediment surface agitation caused by the release; DISI from land-based sources of input to establish the intertidal zone and open waters, sediments and phytoplankton material exchange calculation model, based on the data and results of this paper, calculated with the study area in the summer intertidal nutrient closing branch results are as follows: the region of open sea water nutrient throughput (DIN to 15.70 107μmol/m2 the DIP to 0.46 × 107μmol/m2) is much larger than the sediments of water bodies nutrient supplement (DIN 6415.36μmol/m2 the DIP 5.28μmol/m2) and phytoplankton absorption of nutrients (DIN 5235.1μmol/m2, DIP for 147.77μmol/m2) that the season of the Yellow River Delta intertidal nutrients with water is a net output.
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