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Dong X, Liu Y, Ma X, Wang S, Yang H, Gao X, Wang G, Wang H. Disclosing the effect of exogenous betaine on growth of Suaeda salsa (L.) Pall in the Liaohe coastal wetland, North China. MARINE POLLUTION BULLETIN 2024; 198:115852. [PMID: 38043203 DOI: 10.1016/j.marpolbul.2023.115852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2023] [Revised: 10/12/2023] [Accepted: 11/24/2023] [Indexed: 12/05/2023]
Abstract
Liaohe coastal wetland has experienced severe degradation of Suaeda salsa (L.) Pall (S. salsa) in recent years. However, the impact of exogenous betaine (GB) on S. salsa growth remains unclear. Therefore, we conducted a natural simulated cultivation in soils of coastal wetland to investigate the effects of GB on S. salsa growth. The results showed that GB increased the height and weight of S. salsa, and meanwhile stimulated the synthesis of endogenous betaine and amino acids, increased soluble sugars and elevated the activity of Na+, K+-ATPase (enhancing osmotic stability). In addition, the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT) increased, and malondialdehyde (MDA) and H2O2 decreased correspondingly, thereby improving the antioxidant capacity. Overall, GB application significantly alleviated salt stress and effectively promoted S. salsa growth. This study first indicated the important role of GB in influencing S. salsa growth, offering potential strategies for remediation in coastal wetlands.
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Affiliation(s)
- Xu Dong
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Yu Liu
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China; Environmental Information Institute, Dalian Maritime University, Dalian, China.
| | - Xiangfeng Ma
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Shuyuan Wang
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Huanyu Yang
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Xinjie Gao
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China
| | - Guoguang Wang
- College of Environmental Science and Engineering, Dalian Maritime University, Dalian, China.
| | - Haixia Wang
- Navigation College, Dalian Maritime University, Dalian, China
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Wei C, Su F, Yue H, Song F, Li H. Spatial distribution characteristics of denitrification functional genes and the environmental drivers in Liaohe estuary wetland. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:1064-1078. [PMID: 38030842 DOI: 10.1007/s11356-023-30938-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Accepted: 11/03/2023] [Indexed: 12/01/2023]
Abstract
Genes nirS, nirK, and nosZ are specific for the denitrification process, which is associated with greenhouse gas N2O emission. The abundances and diversities of community containing these three genes are usually used as a common index to reflect the denitrification process, and they would be affected by differences in environmental factors caused by changes from warm to cold conditions. The quantification of denitrification in natural wetlands is complex, and straightforward identification of spatial distribution and drivers affecting the process is still developing. In this study, the bacterial communities, gene diversities, and relative abundances involved in denitrification were investigated in Liaohe Estuary Wetland. We analyzed the relative abundances, diversities, and communities of bacteria containing the three genes at warm and cold conditions using Illumina MiSeq sequencing and detected the potential environmental factors influencing their distribution by using a random forest algorithm. There are great differences in the community composition of the bacteria containing genes nirS, nirK, and nosZ. All the abundant taxa of nirS and nirK communities belonged to phylum Proteobacteria. Compared with the community composition of bacteria containing nirS and nirK, the community of bacteria containing nosZ is more diverse, and the subdivision taxa of phylum Euryarchaeota was also abundant in the community containing nosZ. The distribution characteristics of the relative abundance of nirS and nirK showed obvious differences both at warm and cold climate conditions. The oxidation-reduction potential, nitrite nitrogen, and salinity were detected as potential variables that might explain the diversity of nirS. The total nitrogen and nitrite nitrogen were the important variables for predicting the relative abundance of nirS at warm climate condition, while oxidation-reduction potential and pH contributed to the diversity of nirS at cold condition. The bulk density of sediment was detected as a potential variable affecting the relative abundance of nirK at warm and cold conditions, and diversity of nirK at warm condition, while nitrite nitrogen was detected as an important environmental factor for predicting the diversity of nirK at cold condition. Overall, our results show that the key environmental factors, which affect the relative abundance, diversity, and community of bacteria containing the functional denitrification genes, are not exactly the same, and the diversities of nirS, nirK, and nosZ have a higher environmental sensitivity than their relative abundances.
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Affiliation(s)
- Chao Wei
- College of Water Conservancy, Shenyang Agricultural University, Shenyang, 110866, Liaoning, China
- Liaoning Panjin Wetland Ecosystem National Observation and Research Station, Shenyang, 110866, Liaoning, China
- Liaoning Shuangtai Estuary Wetland Ecosystem Research Station, Panjin, 124112, Liaoning, China
- Liaoning Provincial Key Laboratory of Soil Erosion and Ecological Restoration, Shenyang, 110866, Liaoning, China
| | - Fangli Su
- College of Water Conservancy, Shenyang Agricultural University, Shenyang, 110866, Liaoning, China.
- Liaoning Panjin Wetland Ecosystem National Observation and Research Station, Shenyang, 110866, Liaoning, China.
- Liaoning Shuangtai Estuary Wetland Ecosystem Research Station, Panjin, 124112, Liaoning, China.
- Liaoning Provincial Key Laboratory of Soil Erosion and Ecological Restoration, Shenyang, 110866, Liaoning, China.
| | - Hangyu Yue
- College of Water Conservancy, Shenyang Agricultural University, Shenyang, 110866, Liaoning, China
| | - Fei Song
- College of Water Conservancy, Shenyang Agricultural University, Shenyang, 110866, Liaoning, China
- Liaoning Panjin Wetland Ecosystem National Observation and Research Station, Shenyang, 110866, Liaoning, China
- Liaoning Shuangtai Estuary Wetland Ecosystem Research Station, Panjin, 124112, Liaoning, China
- Liaoning Provincial Key Laboratory of Soil Erosion and Ecological Restoration, Shenyang, 110866, Liaoning, China
| | - Haifu Li
- College of Water Conservancy, Shenyang Agricultural University, Shenyang, 110866, Liaoning, China
- Liaoning Panjin Wetland Ecosystem National Observation and Research Station, Shenyang, 110866, Liaoning, China
- Liaoning Shuangtai Estuary Wetland Ecosystem Research Station, Panjin, 124112, Liaoning, China
- Liaoning Provincial Key Laboratory of Soil Erosion and Ecological Restoration, Shenyang, 110866, Liaoning, China
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Yu J, Li R, Zhang X, Du Y, Ma R, Zhao X, Zuo S, Dong K, Wang R, Zhang Y, Gu Y, Sun J. Bioremediation of petroleum hydrocarbon contaminated soil by microorganisms immobilized on sludge modified by non-ionic surfactant. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:28010-28022. [PMID: 36396759 DOI: 10.1007/s11356-022-24211-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Accepted: 11/10/2022] [Indexed: 06/16/2023]
Abstract
The immobilization of microorganisms on high-quality and inexpensive carriers to remediate oil-contaminated soil is an effective strategy for contaminated soil remediation. Due to the abundance in nutrients, large specific surface area, and fewer pathogens, the composting sludge is considered a high-quality immobilized material. Herein, two non-ionic surfactants, TW-80 and sophorolipid, were used to modify composted sludge. High-efficiency petroleum hydrocarbon-degrading bacteria groups selected in the laboratory were fixed on the modified composting sludge under optimal conditions. The immobilized material was placed in the soil contaminated by petroleum hydrocarbons at an additive amount of 2wt/%, and a simulated remediation experiment was performed for 90 days. Both soil properties and microbial structure were characterized. Surfactant-modified compost sludge enhances the adsorption capacity to petroleum hydrocarbon. The immobilized microorganisms in the modified compost sludge showed a good effect on the remediation of soil contaminated by petroleum hydrocarbons. In addition, immobilized materials also increase the diversity of the microbial community structure in the soil. High-efficiency petroleum hydrocarbon-degrading bacteria immobilized on surfactant-modified compost can effectively promote the degradation of petroleum hydrocarbons in the soil and increase the abundance of microorganisms in the soil. It shows the feasibility of eco-friendly remediation of hydrocarbon-contaminated soil.
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Affiliation(s)
- Junlong Yu
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Ruyue Li
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Xiuxia Zhang
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China.
| | - Yi Du
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Ruojun Ma
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Xiaodong Zhao
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Shuai Zuo
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Kangning Dong
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Ruirui Wang
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Yupeng Zhang
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Yingying Gu
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
| | - Juan Sun
- Department of Environmental and Safety Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum, Qingdao, 266580, Shandong, China
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Li X, Liu G. Study on the change monitoring of typical estuarine wetland and its effect on ecological factors in Bohai Rim region, China. Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.967593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Estuarine wetlands provide an especially ecological home for various flora and fauna, with fragile ecological structures and functions easily affected by the external disturbances of both anthropogenic and natural activities. Recently, wetlands (such as water and marsh) of the Bohai Rim region have been, and continue to be, lost or altered under the influence of both local urbanization and economic development. There is an increasing need for crucial essential wetland change detection as one of the most critical works for relevant research. The paper’s objective focuses on detecting the annual and interannual changes at a large spatial scale for understanding the mainly changed cover type of estuarine wetlands and measuring its impact on coastline ecological factors. Two typical study areas, including the Shuangtai Estuary wetland and Yellow River Delta, are selected for the assessment of changes to wetlands in Bohai Rim region, China. Additionally, Landsat TM/OLI images between 2005 and 2015, as the standard years for change detection, are used as the experimental data resources. To realize the rapid and automatic detection of change to wetland at a larger scale, a method is constructed to extract the change information from satellite images integrating the dynamic ratio and the max-difference algorithm. Based on the remote sensing base ecological index (RSEI), three ecological indexes include water body index, vegetation index, and soil index, calculated the annual maximum difference and the inter-annual dynamic rate of change to wetland. Furthermore, wetland changes are graded and evaluated five significant levels from the annual yearly and interannual scales. Results show several significant findings: (1) from 2005 to 2015, the ecological change with an overall improvement trend was in two monitoring areas of Bohai Rim region. The annual change of ecological factors in the positively changed area (improve) was more and more significant, with the mainly converted type of the expansion of paddy field. In the negatively changing area (degrade), annual ecological change was more and more insignificant, with the main expansion of bare land. (2) The significantly increased accumulation of normalized difference vegetation index (NDVI) was the main ecological change feature of the Shuangtai Estuary wetland. The significant regional changes in the Yellow River Delta were the interaction of ecological factors, included modified normalized difference water index (MNDWI), NDVI, and normalized difference soil index (NDSI). The study on the change detection of wetland and its influence on ecological factors in Bohai Rim region between two different periods enriches remote sensing monitoring technology of change to wetlands, betters quantitative evaluation of ecological factors, and provides updated data support for the wetland natural resource inventory at the various scales.
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Evolutions of 30-Year Spatio-Temporal Distribution and Influencing Factors of Suaeda salsa in Bohai Bay, China. REMOTE SENSING 2021. [DOI: 10.3390/rs14010138] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Suaeda salsa (L.) Pall. (S. salsa) acts as a pioneer species in coastal wetlands due to its high salt tolerance. It has significant biodiversity maintenance, socioeconomic values (e.g., tourism) due to its vibrant color, and carbon sequestration (blue carbon). Bohai Bay region, the mainly distributed area of S. salsa, is an economic intensive region with the largest economic aggregate and population in northern China. The coastal wetland is one of the most vulnerable ecosystems with the urbanization and economic developments. S. salsa in Bohai Bay has been changed significantly due to several threats to its habitat in past decades. In this paper, we analyzed all available archived Landsat TM/ETM+/OLI images of the Bohai Bay region by using a decision tree algorithm method based on the Google Earth Engine (GEE) platform to generate annual maps of S. salsa from 1990 to 2020 at a 30-m spatial resolution. The temporal-spatial dynamic changes in S. salsa were studied by landscape metric analysis. The influencing factors of S. salsa changes were analyzed based on principal component analysis (PCA) and a logistic regression model (LRM). The results showed that S. salsa was mainly distributed in three regions: the Liao River Delta (Liaoning Province), Yellow River Delta (Shandong Province), and Hai River Estuary (Hebei Province, Tianjin). During the past 31 years, the total area of S. salsa has dramatically decreased from 692.93 km2 to 51.04 km2, which means that 92.63% of the area of S. salsa in the Bohai Bay region was lost. In the 641.89 km2 area of S. salsa that was lost, 348.80 km2 of this area was converted to other anthropic land use categories, while 293.09 km2 was degraded to bare land. The landscape fragmentation of S. salsa has gradually intensified since 1990. National Nature Reserves have played an important role in the restoration of suitable S. salsa habitats. The analysis results for the natural influencing factors indicated that precipitation, temperature, elevation, and distance to the coastline were considered to be the major influencing factors for S. salsa changes. The results are valuable for monitoring the dynamic changes of S. salsa and can be used as effective factors for the restoration of S. salsa in coastal wetlands.
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