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Constructed wetlands can play an active role in improving the water quality of urban rivers. In this study, a sequential series system of the floating-bed constructed wetland (FBCW), horizontal subsurface flow constructed wetland (HSFCW), and surface flow constructed wetland (SFCW) were constructed for the urban river treatment in the cold regions of North China, which gave full play to the combined advantages. In the Yitong River, the designed capacity and the hydraulic loading of the system was 100 m3/d and 0.10 m3/m2d, respectively. The hydraulic retention time was approximately 72 h. The monitoring results, from April to October in 2016, showed the multiple wetland ecosystem could effectively remove chemical oxygen demand (COD), ammonia nitrogen (NH4+-N), total nitrogen (TN), total phosphate (TP), and suspended solids (SS) at average removal rates of 74.79%, 80.90%, 71.12%, 78.44%, and 91.90%, respectively. The removal rate of SS in floating-bed wetland was the largest among all the indicators (80.24%), which could prevent the block of sub-surface flow wetland effectively. The sub-surface flow wetland could remove the NH4-N, TN, and TP effectively, and the contribution rates were 79.20%, 64.64%, and 81.71%, respectively. The surface flow wetland could further purify the TN and the removal rate of TN could reach 23%. The total investment of this ecological engineering was $12,000. The construction cost and the operation cost were $120 and $0.02 per ton of polluted water, which was about 1/3 to 1/5 and 1/6 to 1/3 of the conventional sewage treatment, respectively. The results of this study provide a technical demonstration of the restoration of polluted water in urban rivers in northern China.
Xueyuan Bai; Xianfang Zhu; Haibo Jiang; Zhongqiang Wang; Chunguang He; Lianxi Sheng; Jie Zhuang. Purification Effect of Sequential Constructed Wetland for the Polluted Water in Urban River. Water 2020, 12, 1054 .
AMA StyleXueyuan Bai, Xianfang Zhu, Haibo Jiang, Zhongqiang Wang, Chunguang He, Lianxi Sheng, Jie Zhuang. Purification Effect of Sequential Constructed Wetland for the Polluted Water in Urban River. Water. 2020; 12 (4):1054.
Chicago/Turabian StyleXueyuan Bai; Xianfang Zhu; Haibo Jiang; Zhongqiang Wang; Chunguang He; Lianxi Sheng; Jie Zhuang. 2020. "Purification Effect of Sequential Constructed Wetland for the Polluted Water in Urban River." Water 12, no. 4: 1054.
Small- and medium-sized rivers are facing a serious degradation of ecological function in water resource-scarce regions of Northern China. Reservoir ecological operation can restore the damaged river ecological environment. Research on reservoir ecological operation and watershed management of urban rivers is limited in cold regions of middle and high latitudes. In this paper, the urban section of the Yitong River was selected as the research object in Changchun, Northern China. The total ecological water demand and reservoir operation water (79.35 × 106 m3 and 15.52 × 106 m3, respectively) were calculated by the ecological water demand method, and a reservoir operation scheme was established to restore the ecological function of the urban section of the river. To examine the scientific basis and rationality of the operation scheme, the water quality of the river and physical habitat after carrying out the scheme were simulated by the MIKE 11 one-dimensional hydrodynamic-water quality model and the Physical Habitat Simulation Model (PHABSIM). The results indicate that the implementation of the operation scheme can improve the ecological environment of the urban section of the Yitong River. A reform scheme was proposed for the management of the Yitong River Basin based on the problems in the process of carrying out the operation schemes, including clarifying department responsibility, improving laws and regulations, strengthening service management, and enhancing public participation.
Guangyi Deng; Xiaohan Yao; Haibo Jiang; Yingyue Cao; Yang Wen; Wenjia Wang; She Zhao; Chunguang He. Study on the Ecological Operation and Watershed Management of Urban Rivers in Northern China. Water 2020, 12, 914 .
AMA StyleGuangyi Deng, Xiaohan Yao, Haibo Jiang, Yingyue Cao, Yang Wen, Wenjia Wang, She Zhao, Chunguang He. Study on the Ecological Operation and Watershed Management of Urban Rivers in Northern China. Water. 2020; 12 (3):914.
Chicago/Turabian StyleGuangyi Deng; Xiaohan Yao; Haibo Jiang; Yingyue Cao; Yang Wen; Wenjia Wang; She Zhao; Chunguang He. 2020. "Study on the Ecological Operation and Watershed Management of Urban Rivers in Northern China." Water 12, no. 3: 914.
Nitrogen addition leads to large increases in shoot growth but limited increases in root growth and reductions in mycorrhizal colonization of Sorbus pohuashanensis and Acanthopanax sessiliflorus. Soil in the cultivated fields of Changbai Mountain region of China is rich in phosphorus (P) and deficient in nitrogen (N) for most woody plants. However, currently N deposition is increasing and reducing its limitation on plant growth. How N addition shifts carbon investment among shoots, roots and arbuscular mycorrhizal (AM) fungi is not well understood, especially in woody plants growing in the field. We examine the responses of the growth, biomass partitioning and AM colonization of Sorbus pohuashanensis Hedl. and Acanthopanax sessiliflorus Seem. to low and high N fertilization in northeastern China on high-P soil over 3 years. With N addition, both plants increased shoot biomass by 20–45%, and N and P content by 13–30%, while root biomass increased only by 2.1–5.4%. The slower increase in root growth relative to shoot growth resulted in lower root mass fraction. After plant size (ontogeny) was accounted for, root mass fraction still decreased significantly with high N fertilization in both species. Mycorrhizal colonization intensity and AM-colonized root length decreased with an increase in N addition. In this P-rich site, the limited increase in root biomass and large decrease in AM colonization with N addition presumably promoted plant growth and nutrient uptake. Our results imply that the growth of these two species may be improved by increased carbon allocation to shoots, as N addition permitted sufficient nutrient uptake by roots and AM fungi to meet shoot nutrient demand without additional belowground carbon expenditure.
Jing Guo; Yingzhi Gao; David M. Eissenstat; Chunguang He; Lianxi Sheng. Belowground responses of woody plants to nitrogen addition in a phosphorus-rich region of northeast China. Trees 2019, 34, 143 -154.
AMA StyleJing Guo, Yingzhi Gao, David M. Eissenstat, Chunguang He, Lianxi Sheng. Belowground responses of woody plants to nitrogen addition in a phosphorus-rich region of northeast China. Trees. 2019; 34 (1):143-154.
Chicago/Turabian StyleJing Guo; Yingzhi Gao; David M. Eissenstat; Chunguang He; Lianxi Sheng. 2019. "Belowground responses of woody plants to nitrogen addition in a phosphorus-rich region of northeast China." Trees 34, no. 1: 143-154.
The treatment of polluted water and sediment often costs too much and has little benefit. In this study, we proposed a novel design using dredged sediment, shrub willow (Salix spp.) and recirculating hand pumps for the restoration of polluted river water in Changchun city, China. Sediment was filled as a matrix for plant growth, shrub willow was transplanted for the absorption of nutrients, and ten hand-pumped water wells were built for recycling the polluted water. During the 5-month experimental period, the shrub willow growth and nutrient contents, sediment nutrient concentration and water quality were measured. The results showed that this pond system could effectively decrease the sediment pollutant levels, and its removal efficiencies of organic matter (OM), total nitrogen (TN) and total phosphorus (TP) could respectively reach as high as 11%, 10% and 26%. The dissolved oxygen (DO) content increased by more than 90% in August, and the chemical oxygen demand (COD) and total nitrogen (TN) content decreased by 44.93% and 19.82%, respectively. This means that the treatment pond could efficiently work toward the purification of polluted river water. The benefits and feasibility of this system application were also analyzed, and we found that it could be widely used for the treatment of polluted water and sediment in urban areas.
Yi Chen; Xueyuan Bai; Tao Yang; Lifang Zou; Zhisheng Liu; Zhongqiang Wang; Chunguang He. A Preliminary Study on A Novel Water Treatment Pond Design Using Dredged Sediment, Shrub Willow and Recycling Hand Pumps for the Restoration of Water Pollution. Water 2019, 11, 972 .
AMA StyleYi Chen, Xueyuan Bai, Tao Yang, Lifang Zou, Zhisheng Liu, Zhongqiang Wang, Chunguang He. A Preliminary Study on A Novel Water Treatment Pond Design Using Dredged Sediment, Shrub Willow and Recycling Hand Pumps for the Restoration of Water Pollution. Water. 2019; 11 (5):972.
Chicago/Turabian StyleYi Chen; Xueyuan Bai; Tao Yang; Lifang Zou; Zhisheng Liu; Zhongqiang Wang; Chunguang He. 2019. "A Preliminary Study on A Novel Water Treatment Pond Design Using Dredged Sediment, Shrub Willow and Recycling Hand Pumps for the Restoration of Water Pollution." Water 11, no. 5: 972.
Understanding what controls wetland vegetation community composition is vital to conservation and biodiversity management. This study investigates the factors that affect wetland plant communities and distribution in the Tumen River Basin, Northeast China, an internationally important wetland for biodiversity conservation. We recorded floristic composition of herbaceous plants, soil properties, and microclimatic variables in 177, 1 × 1 m2 quadrats at 45 sites, located upstream (26), midstream (12), and downstream (7) of the Basin. We used TWINSPAN to define vegetation communities and canonical correspondence analysis (CCA) to examine the relationships between environmental and biological factors within the wetland plant communities. We recorded 100 plant species from 93 genera and 40 families in the upstream, 100 plant species from 57 genera and 31 families in the midstream, and 85 plant species from 76 genera and 38 families in the downstream. Higher species richness was recorded upstream of the River Basin. The plant communities and distribution were influenced by elevation, soil properties (total potassium, pH, and available phosphorus), and microclimate variables (surface temperature, precipitation, average temperature, sunshine hours, and relative humidity). More than any other factor, according to our results, elevation strongly influenced the structure of wetland plant communities. These findings support prevailing models describing the distribution of wetland plants along environmental gradients. The determination of the relationship between soil and plants is a useful way to better understand the ecosystem condition and can help manage the wetland ecosystem.
Xiaojun Zheng; Jing Fu; Noelikanto Ramamonjisoa; Weihong Zhu; Chunguang He; Chunyan Lu. Relationship between Wetland Plant Communities and Environmental Factors in the Tumen River Basin in Northeast China. Sustainability 2019, 11, 1559 .
AMA StyleXiaojun Zheng, Jing Fu, Noelikanto Ramamonjisoa, Weihong Zhu, Chunguang He, Chunyan Lu. Relationship between Wetland Plant Communities and Environmental Factors in the Tumen River Basin in Northeast China. Sustainability. 2019; 11 (6):1559.
Chicago/Turabian StyleXiaojun Zheng; Jing Fu; Noelikanto Ramamonjisoa; Weihong Zhu; Chunguang He; Chunyan Lu. 2019. "Relationship between Wetland Plant Communities and Environmental Factors in the Tumen River Basin in Northeast China." Sustainability 11, no. 6: 1559.
Habitat loss is a key factor affecting Siberian crane stopovers. The accurate calculation of water supply and effective water resource management schemes plays an important role in stopover habitat restoration for the Siberian crane. In this paper, the ecological water demand was calculated and corrected by developing a three-dimensional model. The results indicated that the calculated minimum and optimum ecological water demand values for the Siberian crane were 2.47 × 108 m3~3.66 × 108 m3 and 4.96 × 108 m3~10.36 × 108 m3, respectively, in the study area. After correction with the three-dimensional model, the minimum and optimum ecological water demand values were 3.75 × 108 m3 and 5.21 × 108 m3, respectively. A water resource management scheme was established to restore Siberian crane habitat. Continuous, area-specific and simulated flood water supply options based on water diversions were used to supply water. The autumn is the best season for area-specific and simulating flood water supply. These results can serve as a reference for protecting other waterbirds and restoring wetlands in semi-arid areas.
Haibo Jiang; Chunguang He; Wenbo Luo; Haijun Yang; Lianxi Sheng; Hongfeng Bian; Changlin Zou. Hydrological Restoration and Water Resource Management of Siberian Crane (Grus leucogeranus) Stopover Wetlands. Water 2018, 10, 1714 .
AMA StyleHaibo Jiang, Chunguang He, Wenbo Luo, Haijun Yang, Lianxi Sheng, Hongfeng Bian, Changlin Zou. Hydrological Restoration and Water Resource Management of Siberian Crane (Grus leucogeranus) Stopover Wetlands. Water. 2018; 10 (12):1714.
Chicago/Turabian StyleHaibo Jiang; Chunguang He; Wenbo Luo; Haijun Yang; Lianxi Sheng; Hongfeng Bian; Changlin Zou. 2018. "Hydrological Restoration and Water Resource Management of Siberian Crane (Grus leucogeranus) Stopover Wetlands." Water 10, no. 12: 1714.
The effectiveness of instream restoration measures in improving habitats has been extensively examined; however, the evidence is inadequate to infer that these measures have positive effects on benthic macroinvertebrates. In this study, we compared the effects of the instream wetland (IW), groin (GR), artificial drop (AD) and boulder placement (BP) measures on the physical habitat and benthic macroinvertebrates. On a five-year scale (two to six years after the implementation of the restoration project), the sample sites treated with the four restoration measures and the unrestored upstream control sample site were compared. The results show that the instream restoration measures had significant positive effects on the physical habitat and benthic macroinvertebrates in the agricultural headwater stream, that the physical habitat quality was a key factor affecting the restoration of the benthic macroinvertebrates, and that the restorative effects were affected by the interaction between the restoration measure and time. The five-year observation period showed continuous improvement in the habitat quality as well as a continuous increase in the taxon richness and diversity of the benthic macroinvertebrates at the restored sample sites. The AD and BP measures had the most significant positive effects on the richness and diversity of the benthic macroinvertebrates. The density of the benthic macroinvertebrates in the habitat at the sample site treated with the IW continuously remained at a high level. The benthic macroinvertebrates in the habitat at the sample site treated with the GR exhibited outstanding durability against and resilience to a flood. Schemes involving densely placed instream restoration measures had continuous positive effects on the physical habitat and benthic macroinvertebrates in agricultural headwater streams on a medium time scale (six years).
Kun Li; Zhenxing Zhang; Haijun Yang; Hongfeng Bian; Haibo Jiang; Lianxi Sheng; Chunguang He. Effects of instream restoration measures on the physical habitats and benthic macroinvertebrates in an agricultural headwater stream. Ecological Engineering 2018, 122, 252 -262.
AMA StyleKun Li, Zhenxing Zhang, Haijun Yang, Hongfeng Bian, Haibo Jiang, Lianxi Sheng, Chunguang He. Effects of instream restoration measures on the physical habitats and benthic macroinvertebrates in an agricultural headwater stream. Ecological Engineering. 2018; 122 ():252-262.
Chicago/Turabian StyleKun Li; Zhenxing Zhang; Haijun Yang; Hongfeng Bian; Haibo Jiang; Lianxi Sheng; Chunguang He. 2018. "Effects of instream restoration measures on the physical habitats and benthic macroinvertebrates in an agricultural headwater stream." Ecological Engineering 122, no. : 252-262.
Mengyao Yang; Mingzhi Lu; Hongfeng Bian; Lianxi Sheng; Chunguang He. Effects of clogging on hydraulic behavior in a vertical-flow constructed wetland system: A modelling approach. Ecological Engineering 2017, 109, 41 -47.
AMA StyleMengyao Yang, Mingzhi Lu, Hongfeng Bian, Lianxi Sheng, Chunguang He. Effects of clogging on hydraulic behavior in a vertical-flow constructed wetland system: A modelling approach. Ecological Engineering. 2017; 109 ():41-47.
Chicago/Turabian StyleMengyao Yang; Mingzhi Lu; Hongfeng Bian; Lianxi Sheng; Chunguang He. 2017. "Effects of clogging on hydraulic behavior in a vertical-flow constructed wetland system: A modelling approach." Ecological Engineering 109, no. : 41-47.
Jing Guo; Haibo Jiang; Hongfeng Bian; Lianxi Sheng; Chunguang He; Yingzhi Gao. Natural succession is a feasible approach for cultivated peatland restoration in Northeast China. Ecological Engineering 2017, 104, 39 -44.
AMA StyleJing Guo, Haibo Jiang, Hongfeng Bian, Lianxi Sheng, Chunguang He, Yingzhi Gao. Natural succession is a feasible approach for cultivated peatland restoration in Northeast China. Ecological Engineering. 2017; 104 ():39-44.
Chicago/Turabian StyleJing Guo; Haibo Jiang; Hongfeng Bian; Lianxi Sheng; Chunguang He; Yingzhi Gao. 2017. "Natural succession is a feasible approach for cultivated peatland restoration in Northeast China." Ecological Engineering 104, no. : 39-44.
Scientists were concerned with the division of labor research early, and much current research in clonal plant ecology has proved environmentally induced or a developmentally programmed division of labor. However, the sexually dependent division of labor in clonal plants has received little attention, and few experimental tests have been conducted to date. Here, using reproductive ramets and non-reproductive ramets in the clonal plant Iris laevigata, we test this hypothesis on morphology and physiology through field and manipulative experiments, including an isotope (15N) labeling method. With regard to morphology, under natural conditions, non-reproductive ramets of I. laevigata were more abundant, taller, and consisted exclusively of leaves, while the relatively rare, smaller reproductive ramets consisted of leaves, flowers, or seeds. However, the mean biomass of non-reproductive ramets was nearly half that of reproductive ramets. With regard to physiology, non-reproductive ramets had a significantly higher net photosynthetic rate over a 24-h period than reproductive ramets. Furthermore, the reproductive ramets stopped leaf growth when flower buds appeared in late May and lost photosynthetic capacity before late June, while its growing fruits still required a constant supply of many nutrients. Manipulative experiments showed that the non-reproductive ramets supplied the nutrient demands for reproduction of the reproductive ramets through clonal integration as high as δ15N of the value (196.1 ± 73.39) of the seed. Thereby providing the first clear evidence of sexually dependent division of labor in clonal plants: Certain individuals constitute a very small amount of reproductive castes (reproductive ramets), whereas a large amount of other individuals (non-reproductive ramets) are “workers” as in social insect societies whose role is primarily as producers. The rapid withering of reproductive ramets that failed to be pollinated highlights their role as irreversibly focused on reproduction, and those unable to reproduce do not contribute to the colony. Additionally, “producer” ramets positively influenced reproductive castes growth, and the division of labor was assumed to underlie the resource allocation pattern among ramets.
Lingyan Wang; Hanxi Wang; Chunguang He; Lianxi Sheng; Zhanhui Tang. An irreversible division of labor through a sexually dependent system in the clonal plant Iris laevigata (Iridaceae). Ecosphere 2017, 8, e01757 .
AMA StyleLingyan Wang, Hanxi Wang, Chunguang He, Lianxi Sheng, Zhanhui Tang. An irreversible division of labor through a sexually dependent system in the clonal plant Iris laevigata (Iridaceae). Ecosphere. 2017; 8 (3):e01757.
Chicago/Turabian StyleLingyan Wang; Hanxi Wang; Chunguang He; Lianxi Sheng; Zhanhui Tang. 2017. "An irreversible division of labor through a sexually dependent system in the clonal plant Iris laevigata (Iridaceae)." Ecosphere 8, no. 3: e01757.
Liang Ma; Chunguang He; Hongfeng Bian; Lianxi Sheng. MIKE SHE modeling of ecohydrological processes: Merits, applications, and challenges. Ecological Engineering 2016, 96, 137 -149.
AMA StyleLiang Ma, Chunguang He, Hongfeng Bian, Lianxi Sheng. MIKE SHE modeling of ecohydrological processes: Merits, applications, and challenges. Ecological Engineering. 2016; 96 ():137-149.
Chicago/Turabian StyleLiang Ma; Chunguang He; Hongfeng Bian; Lianxi Sheng. 2016. "MIKE SHE modeling of ecohydrological processes: Merits, applications, and challenges." Ecological Engineering 96, no. : 137-149.
Since large areas of peatlands in China have been degraded or reclaimed to cropland in recent decades, the conversion of these croplands to wetlands and the restoration of degraded peatlands by means of engineering have been attracting increasing attention. Hydrologic mediation and plantation of dominant peatland species were implemented to determine the effects of these two artificial measures on revegetation and soil property improvement in paddy fields in the Changbai Mountains in Northeast China. The results showed that after a three-year restoration, compared to natural restoration treatment, planting of Carex schmidtii significantly reduced aboveground biomass by 45% (P < 0.05), increased root biomass by 53% (P < 0.05), increased the Shannon–Wiener Index by 17%, enhanced concentrations of total soil organic matter by 28% (P < 0.05), reduced topsoil bulk density by 40% (P < 0.05), and improved water retention capacity of the topsoil. These results demonstrate the ability of C. schmidtii to inhibit the growth of weeds and other nontarget species through competition, and to increase the amount of residual roots in soil due to its well-developed rhizomes. Aboveground biomass and total organic matter in hydrologic mediation were 38% lower and 37% higher than in the natural restoration treatment, respectively. However, annual precipitation in this area is 704.2 mm, higher than most other area in Northeast China, and the Shannon–Wiener Index and soil bulk density were 4% and 29% lower than in the natural restoration treatment, respectively. Furthermore, the combined application of these two measures resulted in 35% lower aboveground biomass, 22% higher Shannon–Wiener Index, 16% higher topsoil organic matter, and 27% lower bulk density than in the natural restoration treatment. However, the growth of C. schmidtii was inhibited due to the reduction in its survival rate and basal width growth rate. Our results suggest that planting C. schmidtii is an effective way to promote the restoration of degraded peatland and enhance its carbon sink function in the Changbai Mountains. On the other hand, implementation of hydrologic mediation is not recommended for this rain-rich region.
Jing Guo; Haibo Jiang; Hongfeng Bian; Chunguang He; Yingzhi Gao. Effects of hydrologic mediation and plantation of Carex schmidtii Meinsh on peatland restoration in China's Changbai Mountain region. Ecological Engineering 2016, 96, 187 -193.
AMA StyleJing Guo, Haibo Jiang, Hongfeng Bian, Chunguang He, Yingzhi Gao. Effects of hydrologic mediation and plantation of Carex schmidtii Meinsh on peatland restoration in China's Changbai Mountain region. Ecological Engineering. 2016; 96 ():187-193.
Chicago/Turabian StyleJing Guo; Haibo Jiang; Hongfeng Bian; Chunguang He; Yingzhi Gao. 2016. "Effects of hydrologic mediation and plantation of Carex schmidtii Meinsh on peatland restoration in China's Changbai Mountain region." Ecological Engineering 96, no. : 187-193.
An assessment of wetland restoration project and their restoration impacts can provide a reference for effective management and habitat improvements. In this paper, a monitoring program was conducted before and after the stopover habitat of the Siberian crane (Grus leucogeranus) was restored. The results indicated that the Siberian crane population and its primary food (Scirpus planiculmis) distribution area increased in the first three years of the restoration project relative to the levels prior to the project. The daily water levels ranged from approximately −20 cm to 20 cm, which is ideal for a stopover habitat for this waterbird. An obvious effect was observed as a result of the restoration of Siberian crane habitat. However, Siberian crane numbers sharply decreased in the later period of the restoration project to 10–40% of the values prior to restoration. The average daily water level was approximately 60 cm, and the distribution area of S. planiculmis decreased, which affected the incidence of Siberian crane stopovers. Furthermore, an effective water management strategy was established to protect Siberian crane populations and habitats. In summer, continuous water supplementation based on varying water demands was used to guarantee the growth of S. planiculmis and provide a suitable water level for Siberian crane stopovers in autumn. At the end of autumn, rapid water supplementation was used to maintain suitable water levels for the following spring. These results can serve as a reference point for protecting and restoring similar waterbird habitats.
Haibo Jiang; Yang Wen; Lifang Zou; Zhongqiang Wang; Chunguang He; Changlin Zou. The effects of a wetland restoration project on the Siberian crane ( Grus leucogeranus ) population and stopover habitat in Momoge National Nature Reserve, China. Ecological Engineering 2016, 96, 170 -177.
AMA StyleHaibo Jiang, Yang Wen, Lifang Zou, Zhongqiang Wang, Chunguang He, Changlin Zou. The effects of a wetland restoration project on the Siberian crane ( Grus leucogeranus ) population and stopover habitat in Momoge National Nature Reserve, China. Ecological Engineering. 2016; 96 ():170-177.
Chicago/Turabian StyleHaibo Jiang; Yang Wen; Lifang Zou; Zhongqiang Wang; Chunguang He; Changlin Zou. 2016. "The effects of a wetland restoration project on the Siberian crane ( Grus leucogeranus ) population and stopover habitat in Momoge National Nature Reserve, China." Ecological Engineering 96, no. : 170-177.
Cultivation for agricultural production often poses threats to nearby wetlands ecosystems in fertile landscapes. In this study, nematode ecological indexes were assessed through the main soil properties of the wetlands, farmlands, and edges of wetlands and farmlands in Jinchuan Wetland by the random sampling. Behavior and reproduction in Caenorhabditis elegans (C. elegans) exposed to the sampled waters were also examined. Stress proteins Hsp70 and Hsp90 were measured both in the living field samples of C. elegans and the lab-tested C. elegans. Our results suggested that disturbance to wetland ecosystems by nitrogen and phosphorus reduced nematode richness and proportions of bacterivore nematodes. Bacterivore nematode diversity and plant–parasitic ecological index were proven to be sensitive indicators of the ecological health of wetlands. Nematode Hsp70 were useful biosensors to monitor and assess the levels of nitrogen and phosphorus pollutions in wetlands. Furthermore, multi-level soil faunal assessments by canonical correspondence analysis showed that Jinchuan Wetland is threatened with non-point source pollution from nearby farmlands.
Yunbiao Wang; Jie Qiao; Chunguang He; Zhongqiang Wang; Wenbo Luo; Lianxi Sheng. Towards multi-level biomonitoring of nematodes to assess risk of nitrogen and phosphorus pollution in Jinchuan Wetland of Northeast China. Ecotoxicology 2015, 24, 2190 -2199.
AMA StyleYunbiao Wang, Jie Qiao, Chunguang He, Zhongqiang Wang, Wenbo Luo, Lianxi Sheng. Towards multi-level biomonitoring of nematodes to assess risk of nitrogen and phosphorus pollution in Jinchuan Wetland of Northeast China. Ecotoxicology. 2015; 24 (10):2190-2199.
Chicago/Turabian StyleYunbiao Wang; Jie Qiao; Chunguang He; Zhongqiang Wang; Wenbo Luo; Lianxi Sheng. 2015. "Towards multi-level biomonitoring of nematodes to assess risk of nitrogen and phosphorus pollution in Jinchuan Wetland of Northeast China." Ecotoxicology 24, no. 10: 2190-2199.
Luzhen Li; Chunguang He; Guodong Ji; Wei Zhi; Lianxi Sheng. Nitrogen removal pathways in a tidal flow constructed wetland under flooded time constraints. Ecological Engineering 2015, 81, 266 -271.
AMA StyleLuzhen Li, Chunguang He, Guodong Ji, Wei Zhi, Lianxi Sheng. Nitrogen removal pathways in a tidal flow constructed wetland under flooded time constraints. Ecological Engineering. 2015; 81 ():266-271.
Chicago/Turabian StyleLuzhen Li; Chunguang He; Guodong Ji; Wei Zhi; Lianxi Sheng. 2015. "Nitrogen removal pathways in a tidal flow constructed wetland under flooded time constraints." Ecological Engineering 81, no. : 266-271.
A study was conducted of treatment performance and nitrogen transformation processes in a trickling filter (TF) used to treat micro-polluted source water under variable hydraulic loading rates (HLRs), ranging from 1.0 to 3.0 m(3)/m(2) d. The TF achieved high and stable COD (97.7-99.3%) and NH4(+)-N (67.3-92.7%) removal efficiencies. Nitrification and anaerobic ammonium oxidation were the dominant nitrogen removal processes in the TF. Path analysis indicated that amoA/anammox and amoA/(narG+napA) were the two key functional gene groups driving the major processes for NH4(+)-N and NO2(-)-N, respectively. The analysis also revealed that anammox/amoA and nxrA/(nirK+nirS) were the two key functional gene groups affecting processes associated with the NO3(-)-N transformation rate. The direct and indirect effect of functional gene groups further confirmed that nitrogen transformation processes are coupled at the molecular level, resulting in a mutual contribution to nitrogen removal in the TF.
Honglei Wang; Guodong Ji; Xueyuan Bai; Chunguang He. Assessing nitrogen transformation processes in a trickling filter under hydraulic loading rate constraints using nitrogen functional gene abundances. Bioresource Technology 2015, 177, 217 -223.
AMA StyleHonglei Wang, Guodong Ji, Xueyuan Bai, Chunguang He. Assessing nitrogen transformation processes in a trickling filter under hydraulic loading rate constraints using nitrogen functional gene abundances. Bioresource Technology. 2015; 177 ():217-223.
Chicago/Turabian StyleHonglei Wang; Guodong Ji; Xueyuan Bai; Chunguang He. 2015. "Assessing nitrogen transformation processes in a trickling filter under hydraulic loading rate constraints using nitrogen functional gene abundances." Bioresource Technology 177, no. : 217-223.
Subtropical rivers support a highly diverse array of benthic macroinvertebrates. In this study, by combining historical data and new data, we identified specific changes in the Guanlan River, in South China, from 1981 to 2011, and evaluated the effectiveness of an ecological restoration project under highly polluted conditions. From 1981 to 2011, the water quality in the Guanlan River underwent three major stages. With the deterioration of water quality, there was an overall decrease in the species number of macroinvertebrates in the Guanlan River, an increase in macroinvertebrate density, and a reduction of the biodiversity, and a reduction of functional feeding groups. In 2011, after five years of comprehensive remediation, the Guanlan River was somewhat improved. Macroinvertebrate biodiversity in the middle reach of the Guanlan River, where a key ecological restoration engineering project was implemented, did not differ significantly from other sites. This finding indicates that the effectiveness of ecological restoration measures in highly polluted rivers, particularly at the reach-scale, is very limited and even ineffective.
Kun Li; Chunguang He; Jie Zhuang; Zhenxing Zhang; Hongyong Xiang; Zhongqiang Wang; Haijun Yang; Lianxi Sheng. Long-Term Changes in the Water Quality and Macroinvertebrate Communities of a Subtropical River in South China. Water 2014, 7, 63 -80.
AMA StyleKun Li, Chunguang He, Jie Zhuang, Zhenxing Zhang, Hongyong Xiang, Zhongqiang Wang, Haijun Yang, Lianxi Sheng. Long-Term Changes in the Water Quality and Macroinvertebrate Communities of a Subtropical River in South China. Water. 2014; 7 (12):63-80.
Chicago/Turabian StyleKun Li; Chunguang He; Jie Zhuang; Zhenxing Zhang; Hongyong Xiang; Zhongqiang Wang; Haijun Yang; Lianxi Sheng. 2014. "Long-Term Changes in the Water Quality and Macroinvertebrate Communities of a Subtropical River in South China." Water 7, no. 12: 63-80.
River restoration is the re-establishment of a river to a state that is more reflective of its predisturbance form. To restore a river polluted by human interference, we conducted an ecological restoration study from 2009 to 2011 on parts of the Yitong River, which is a typical non-point source polluted river in Northern China. The engineering included three parts: riparian vegetation buffering strip (part 1); multi-functional ecological fishponds (part 2), and river channel enhancement zone (part 3). By monitoring and evaluating the pollution indices of the study area's inlet and outlet, we found that the ecological engineering could significantly enhance the reduction rate of NH3-N, COD, and BOD5, which had increased from −14.29%, 1.81%, and −0.5% before restoration to 66.29%, 10.81%, and 7.25% in 2011 (post-restoration), respectively. The diversity of planktonic algae became rich, and in particular the species number representing clean water increased from 1 before restoration (2009) to 8 after the restoration (2011). Our results indicate that ecological engineering can significantly reduce non-point source pollution and improve the water quality, biodiversity, and economic benefits, and it is therefore an effective scientific approach for restoring the integrity of the river ecosystem and achieving continuous social and economic development.
Yanjie Mi; Chunguang He; Hongfeng Bian; Yanpeng Cai; Lianxi Sheng; Liang Ma. Ecological engineering restoration of a non-point source polluted river in Northern China. Ecological Engineering 2014, 76, 142 -150.
AMA StyleYanjie Mi, Chunguang He, Hongfeng Bian, Yanpeng Cai, Lianxi Sheng, Liang Ma. Ecological engineering restoration of a non-point source polluted river in Northern China. Ecological Engineering. 2014; 76 ():142-150.
Chicago/Turabian StyleYanjie Mi; Chunguang He; Hongfeng Bian; Yanpeng Cai; Lianxi Sheng; Liang Ma. 2014. "Ecological engineering restoration of a non-point source polluted river in Northern China." Ecological Engineering 76, no. : 142-150.
Chunguang He; Tadaharu Ishikawa; Mitsuteru Irie; Lianxi Sheng; Shengzhong Wang. STUDY ON THE HYDROLOGICAL CONDITION OF XIANGHAI WETLAND IN JILIN PROVINCE, CHINA FOR NESTING OF RED-CROWNED CRANE. PROCEEDINGS OF HYDRAULIC ENGINEERING 2006, 50, 1129 -1134.
AMA StyleChunguang He, Tadaharu Ishikawa, Mitsuteru Irie, Lianxi Sheng, Shengzhong Wang. STUDY ON THE HYDROLOGICAL CONDITION OF XIANGHAI WETLAND IN JILIN PROVINCE, CHINA FOR NESTING OF RED-CROWNED CRANE. PROCEEDINGS OF HYDRAULIC ENGINEERING. 2006; 50 ():1129-1134.
Chicago/Turabian StyleChunguang He; Tadaharu Ishikawa; Mitsuteru Irie; Lianxi Sheng; Shengzhong Wang. 2006. "STUDY ON THE HYDROLOGICAL CONDITION OF XIANGHAI WETLAND IN JILIN PROVINCE, CHINA FOR NESTING OF RED-CROWNED CRANE." PROCEEDINGS OF HYDRAULIC ENGINEERING 50, no. : 1129-1134.
Chunguang He; Lianxi Sheng; Huiqing Lang; Lianshan Li; Lifang Zou. [Migration dynamics of Grus japonensis in recent years spring and conservation of its habitat in Xianghai Nature Reserve]. Ying yong sheng tai xue bao = The journal of applied ecology 2004, 15, 1523 -6.
AMA StyleChunguang He, Lianxi Sheng, Huiqing Lang, Lianshan Li, Lifang Zou. [Migration dynamics of Grus japonensis in recent years spring and conservation of its habitat in Xianghai Nature Reserve]. Ying yong sheng tai xue bao = The journal of applied ecology. 2004; 15 (9):1523-6.
Chicago/Turabian StyleChunguang He; Lianxi Sheng; Huiqing Lang; Lianshan Li; Lifang Zou. 2004. "[Migration dynamics of Grus japonensis in recent years spring and conservation of its habitat in Xianghai Nature Reserve]." Ying yong sheng tai xue bao = The journal of applied ecology 15, no. 9: 1523-6.