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Bioavailability of copper(II) to Suaeda heteroptera and Nereis succinea was analyzed in this paper by comparing the concentrations of the copper (Cu) chemical forms in sediments to the Cu concentrations in the tissues of S. heteroptera and N. succinea. The morphological distribution of heavy metals in the sediment was related to the concentration of Cu added to the sediment. In the S. heteroptera treatment groups, available Cu in sediments decreased, and N. succinea activities improved the sediment physical and chemical properties, and thus increased the bioavailable Cu for S. heteroptera uptake. The Cu contents reached 160.75 mg/kg in S. heteroptera and 2801.4 mg/kg in N. succinea. When S. heteroptera and N. succinea were combined, significantly more Cu was removed from the sediments than for the two working separately. Therefore, the existence of N. succinea could enhance the absorption of Cu in the coastal sediment planted with S. heteroptera and had a positive impact on environmental pollution.

This paper studied the impact of Cu and Pb pollution on concentrations of reactive oxygen species (superoxide anion radical (O2●−) and peroxide (H2O2)) and on the activity of antioxidant enzyme (superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD)) in the halophyte Suaeda heteroptera. At concentrations less than 50 mg kg−1, Cu had little effect on S. heteroptera. At concentrations higher than 200 Cu mg kg−1, the growth of S. heteroptera was significantly inhibited, an impact that was most pronounced in seedling weight (p

A knowledge of the total amount of heavy metals is not enough to assess the environmental impact of polluted soils. Therefore, the determination of Cu fractions in sediment is important to evaluate its behavior in the environment and its mobilization capacity. The distribution of Cu (II) fractions in the sediment was studied in a laboratory simulation experiment. The results indicated that the distribution of Cu fractions was related to the concentration of Cu in sediments. In the Suaeda heteroptera group, the content of exchangeable and carbonate-bound were reducing, while the Fe-Mn oxide- and organic matter-bound were basically raising. In the Nereis succinea group, the content of Fe-Mn oxide- and organic matter-bound were from raising to reducing, and the residual was basically reducing with the increasing Cu concentrations. Generally speaking, the existence of N. succinea could enhance the uptake of Cu in the coastal sediment planted with S. heteroptera. When S. heteroptera and N. succinea in combination, effect of S. heteroptera and N. succinea on Cu fractions in sediments was significantly higher than the two working singly.

Suaeda salsa(S.salsa) is a typical vegetation of coastal wetland in the north of Liaodong Bay. The S. salsa biomass assessment plays an important role in understanding the ecosystem productivity of coastal wetland and the formation of ecosystem structure and function. Usually the S.salsa coverage is inhomogeneous. The low S.salsa coverage can be found at a natural condition, the soil background has a strong influence on S.salsa spectral data. The Transformed Soil Adjusted Vegetation Index (TSAVI) used as independent variable was derived by the Landsat 8 OLI simulation data. The S.salsa biomass inversion models were built based on the regression analysis of TSAVI and ground measured biomass in this study. The correlation between TSAVI (600~687, 820~880 nm) and biomass was significant, the correlation coefficient was about 0.9, up to 0.92. The results of linear and quadratic models were better than those of logarithmic, exponential and power models, the determination coefficient r2 of linear and quadratic models were 0.83. Combined with F value and operation efficiency, the linear model was the best option for mature S.salsa biomass inversion. The linear model was applied to invert the S.salsa biomass by using the Landsat 8 OLI data in the study area and it was further validated using in-situ data. The correlation coefficient between the in-situ value and retrieved value was 0.962, the relative error was 0.106. For higher S.salsa coverage, the relative error was lower. The relative error of the low-cover S.salsa biomass inversion was around 0.18. The results showed that the established model has good accuracy for different coverage. In addition, with the introduction of ±5% error of soil line parameters a and b, the average relative errors were relatively stable, and the correlation coefficients were reduced, but all the correlative coefficients were above 0.9. The results showed that the established model is stable.

Effects of enhanced ultraviolet B (UV-B, 280-320 nm) on macroalgae have gained particular attention in recent years. We investigated the changes in the growth, physiological and biochemical characteristics of C. ocellatus under UV-B radiation in this study. The results showed that UV-B could inhibit the growth of C. ocellatus (pC. ocellatus were not obvious. The soluble proteins content and MDA content in C. ocellatus were increased by UV-B radiation, and the increase of MDA content was extraordinary significant. The SOD activity and CAT activity were increased when the intensity of UV-B radiation was 7.2 J/m2, while the SOD activity and CAT activity were decreased when the intensity of UV-B radiation was 21.6 J/m2.

Effects of Ulva pertusa Kjellman stress and UV-B radiation on the growth, physiology and biochemistry of Alexandrium tamarense were studied under laboratory conditions. The results demonstrated that U. pertusa stress and UV-B radiation could inhibit the growth of A. tamarense. Physiology and biochemistry of A. tamarense could be affected under U. pertusa stress and UV-B radiation treatment. U. pertusa stress caused the increase in SOD activity and decrease in H2O2 content. As for UV-B radiation, Chl-a content and soluble content were decreased, while H2O2 content, MDA content and SOD activity were increased. With regard to the combined effects of U. pertusa stress and UV-B radiation, Chl-a content and soluble content were decreased, while MDA content and SOD activity were increased. Compared with UV-B radiation, the combined effects of U. pertusa stress and UV-B radiation treatment on the growth, physiological and biochemical were indiscernible.

For the sustainable development of oceans, we need a reliable, effective and fast MEIA (Marine Environmental Impact Assessment) System. According to the certain goal of MEIA system, this paper design a preliminary MEIA System based on 3S technology. The system consists of a database management subsystem, statistical analysis subsystem and MEIA subsystem.It will put the 3S technology to the best use to achieve the analysis, evaluation, decision automation,technology process and visualization of MEIA. Taking into account the scalability of the system, it will reserve the interface for secondary development.

With the required data collected and analyzed, the RS image data and spatial attribute data database design, aiming at the estuaries environmental impact assessment system (EEIAS) data characteristics, has been completed. It provides more targeted data processing and storage support for the EEIAS

A simple indoor recirculating system for production of juvenile sea cucumber ( Apostichopus japonicus ) was operated on a commercial scale for 90 days during winter. The system consists of three 70 m 3 sea cucumber rearing tanks and one biofilter tank where macroalgae ( Ulva pertusa ) was used as a biofilter in order to reduce water requirements. Effluent from the sea cucumber tanks drained into the macroalgae biofilter tank and were then returned to the sea cucumber tanks by a discontinuous-flow recirculation system. Survival and growth rates in the sea cucumber culture tanks were similar to those in the control tank (with one water exchange per day). The survival rate averaged about 87%. The average body weight increased from 3.5 ± 0.3 g to 8.1 ± 0.8 g and total sea cucumber biomass production over the experimental period was 745 g m −2 after initial stocking densities of 375 g m −2 . The growth rate of U. pertusa was 3.3% day −1 . U. pertusa was efficient in removing toxic ammonia and in maintaining the water quality within acceptable levels for sea cucumber culture; there were only small daily variations of temperature, pH and DO. The U. pertusa tank removed 68% of the TAN (total ammonia-nitrogen) and 26% of the orthophosphate from the sea cucumber culture effluent; the macroalgae biofilter removed ammonia at an average rate of 0.459 g N m −2 day −1 . It would be efficient to use the U. pertusa biofilter in a recirculating system for production of A. japonicus juveniles in winter.

To investigate the chemical constituents of Kochia scoparia.The constituents of EtOAc-soluble portion were isolated and purified by silica gel column chromatography. Their structures were identified by spectral features.Twelve compounds were isolated and identified as tectorigenin (1), pratensein (2), 5,2'-dihydroxy-6,7-methylenedioxyisoflavone (3), iriflogenin (4), 5-hydroxy-6, 7-methylenedioxyflavone (5), fumalicacid (6), N-trans-feruloylmethoxytyramine (7), N-transferuloyltyramine (8), stigmasterol (9), oleanolic acid (10), beta-stigmasterol (11), daucosterol (12).compounds 1-9 are isolated from this plant for the first time.