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Shells are waste products from mariculture that presents a major disposal problem in coastal regions in China. While based on previous researches, shells can be used as carrier in Aerobic Bio-filter (ABF). It was investigated in present research that the role of shell for wastewater pH adjustment and alkalinity releasing through static experiment. Under the wastewater and shell volume ratio of 9:1...
Sediments microbial communities in aquatic environments are important because they are fundamental to biogeochemical and energy cycling, productivity as well as "buffering" capacity of aquatic ecosystems. We collected sediment samples from four stations characterized by different aquatic environmental conditions during two periods of times and investigated effects of nutrient factors on...
Nutrient has been considered to be undoubtedly one of the key factors stimulating algae growth. By a series of experiments the relationship between nutrient elements and phytoplankton growth was explored in three lakes: Lake Yezhihu, Lake Tangxunhu and Lake Nanhu, located in Wuhan City, China. We undertook 5 days in-site incubation experiments in the late April, 2007. The results showed that the chlorophyll...
A clonal herb species, Iris japonica, is used for constructing understory horticultural landscape, and it has high adaptability in understory condition. Root characteristics differences between I. japonica and other herb species in two typical natural habitats, Open area at forest edge (OAFE) and Bamboo forest (BF) were carried out on Jinyun Mountain, Chongqing, China, and a reciprocal transplant-replant...
This paper mainly studied the characteristics of pollutants removal by ecological floating-bed for Linjiang River which was one of the heavily polluted branch rivers in Three-Gorges reservoir area. Ecological floating-bed employed ceramisite as the substrate. The removal effects of Total Nitrogen (TN), Total Phosphorus (TP) and Chemical Oxygen Demand (COD) and purification characteristics of floating-bed...
Concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) in surface sediments collected from the Jiaozhou Bay were measured by GC-FID. The results showed that the total concentrations of PAHs varied from 1242.2 to 29558.1 ng g-1 (average concentration was 5065.1 ng g-1), which indicated that the total PAHs concentrations were at moderate level compared to relevant areas worldwide. The proportion...
The increasing different stress caused by human activities induced changes in Tianjin Binhai New Area intertidal wetlands recent years. To find out whether the ecosystem health status of the wetlands in this area has been changed correspondingly, data of macrobentho abundance and biomass of 20 stations, both in May and August 2007 were applied, and multiple ecological indicators of different levels...
Rainout shelters and irrigation systems were manipulated in a Mongolian pine plantations to simulate changes in precipitation amount and to explore how it would affect soil N availability in in Keerqin Sandy lands. Both reduced (RP) and increased (IP) precipitation treatments significantly affected soil inorganic N concentration, increasing it through the growing season except in September under RP...
The paper investigated the effects of irrigation of poultry waste water on soil fertility and biomass production of cabbage in accordance with the standard of Environmental Technical Terms for Green Food Production Area (NY/T391-2000). The results showed that irrigation of 46.88m3 per hectare every 10 days resulted in the highest production of biomass of cabbage as well best soil fertility index....
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