Response of Ammonia‐oxidizing Archaea and Bacteria to Streptomycin Sulfate and Penicillin in Coastal Wetlands along the Bohai Rim

2020 ◽  
Author(s):  
Shuangyu Tang ◽  
Chen Wang ◽  
Guodong Ji
Keyword(s):  
Coastal Wetlands ◽  
Streptomycin Sulfate ◽  
Ammonia Oxidizing Archaea ◽  
Bohai Rim

scholarly journals Mapping Coastal Wetlands of the Bohai Rim at a Spatial Resolution of 10 m Using Multiple Open-Access Satellite Data and Terrain Indices

2020 ◽  
Vol 12 (24) ◽  
pp. 4114
Author(s):  
Shaobo Sun ◽  
Yonggen Zhang ◽  
Zhaoliang Song ◽  
Baozhang Chen ◽  
Yangjian Zhang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Open Access ◽  
Spatial Resolution ◽  
Coastal Wetlands ◽  
Coastal Wetland ◽  
Regional Scale ◽  
Google Earth ◽  
Human Welfare ◽  
Bohai Rim ◽  
Terrain Indices

Coastal wetlands provide essential ecosystem services and are closely related to human welfare. However, they can experience substantial degradation, especially in regions in which there is intense human activity. To control these increasingly severe problems and to develop corresponding management policies in coastal wetlands, it is critical to accurately map coastal wetlands. Although remote sensing is the most efficient way to monitor coastal wetlands at a regional scale, it traditionally involves a large amount of work, high cost, and low spatial resolution when mapping coastal wetlands at a large scale. In this study, we developed a workflow for rapidly mapping coastal wetlands at a 10 m spatial resolution, based on the recently emergent Google Earth Engine platform, using a machine learning algorithm, open-access Synthetic Aperture Radar (SAR) and optical images from the Sentinel satellites, and two terrain indices. We then generated a coastal wetland map of the Bohai Rim (BRCW10) based on the workflow. It has a producer accuracy of 82.7%, according to validation using 150 wetland samples. The BRCW10 data reflected finer information when compared to wetland maps derived from two sets of global high-spatial-resolution land cover data, due to the fusion of multiple data sources. The study highlights the benefits of simultaneously merging SAR and optical remote sensing images when mapping coastal wetlands.

scholarly journals Different Driving Factors for Potential Activity of Ammonia-Oxidizing Archaea and Bacteria in Coastal Wetlands

2021 ◽  
Author(s):  
Xianfang zhu ◽  
Chen Wang ◽  
Shuangyu Tang ◽  
Guodong Ji
Keyword(s):  
Nitrogen Cycle ◽  
Coastal Wetlands ◽  
Ammonia Oxidation ◽  
Equation Model ◽  
Ammonium Concentration ◽  
Ammonia Oxidizing Archaea ◽  
Soil Sediment ◽  
Measured Activity ◽  
Structure Equation Model ◽  
Potential Activity

Abstract This study aimed to evaluate which environmental factors and genetic groups were important in explaining measured activity of Ammonia-oxidizing archaea (AOA) and bacteria (AOB), which play important roles in global nitrogen cycle, providing a new insight into the mechanism of archaeal and bacterial ammonia oxidation. We sampled 62 soil/sediment samples from coastal wetlands of the Bohai area of China and assessed the abundance of functional genes involved in the nitrogen cycle, soil/sediment characteristics and the potential activity of AOA (PAOA) and AOB (PAOB) using specific inhibitors. At last, we introduced the structure equation model (SEM) to infer direct and indirect effects of variables on potential activities. The results indicated that the change in AOA-amoA gene abundance may be more independent, while AOB-amoA was closely associated with the change in abundance of amx and denitrifier. PAOA was mainly defined by AOA-amoA abundance and partially influenced by the norA gene, suggesting coupling of archaeal ammonia oxidation with nitrite oxidation. PAOB was significantly defined by the abundance of amx and denitrifier, indirectly mediated by AOB-amoA. The activity of AOA seemed to be more independent of other microbial activities, while the activity of AOB varied closely with fluctuations of other microbial species. PAOA was mediated directly by the C/N ratio and indirectly by nitrite concentration and TOC value, while PAOB was mediated directly by ammonium concentration and TOC value and indirectly by C/N ratio. The activity of AOB may be determined by several other functional gene groups and had little correlation with AOB abundance while the activity of AOA was mostly controlled by itself.

scholarly journals Modelling Aboveground Biomass Carbon Stock of the Bohai Rim Coastal Wetlands by Integrating Remote Sensing, Terrain, and Climate Data

2021 ◽  
Vol 13 (21) ◽  
pp. 4321
Author(s):  
Shaobo Sun ◽  
Yafei Wang ◽  
Zhaoliang Song ◽  
Chu Chen ◽  
Yonggen Zhang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Spatial Resolution ◽  
Aboveground Biomass ◽  
Coastal Wetlands ◽  
Carbon Stock ◽  
Coastal Wetland ◽  
Data Sets ◽  
Special Role ◽  
Climate Data ◽  
Bohai Rim

Remotely sensed vegetation indices (VIs) have been widely used to estimate the aboveground biomass (AGB) carbon stock of coastal wetlands by establishing Vis-related linear models. However, these models always have high uncertainties due to the large spatial variation and fragmentation of coastal wetlands. In this paper, an efficient coastal wetland AGB model for the Bohami Rim coastal wetlands was presented based on multiple data sets. The model was developed statistically with 7 independent variables from 23 metrics derived from remote sensing, topography, and climate data. Compared to previous models, it had better performance, with a root mean square error and r value of 188.32 g m−2 and 0.74, respectively. Using the model, we firstly generated a regional coastal wetland AGB map with a 10 m spatial resolution. Based on the AGB map, the AGB carbon stock of the Bohai Rim coastal wetland was 2.11 Tg C in 2019. The study demonstrated that integrating emerging high spatial resolution multi-remote sensing data and several auxiliary metrics can effectively improve VIs-based coastal wetland AGB models. Such models with emerging freely available data sets will allow for the rapid monitoring and better understanding of the special role that “blue carbon” plays in global carbon cycle.

scholarly journals Detecting Shoreline Changes in Typical Coastal Wetlands of Bohai Rim in North China

Wetlands ◽  
2013 ◽  
Vol 33 (4) ◽  
pp. 617-629 ◽  
Author(s):  
Yuandong Wang ◽  
Xiyong Hou ◽  
Ping Shi ◽  
Liangju Yu
Keyword(s):  
Coastal Wetlands ◽  
North China ◽  
Shoreline Changes ◽  
Bohai Rim

scholarly journals Diversity and environmental influencing factors of curlew waterbirds in coastal wetlands of the Bohai Rim

2021 ◽  
Vol 41 (22) ◽  
Author(s):  
付梦娣，贾强，任月恒，周汉昌，李俊生，张渊媛 FU Mengdi
Keyword(s):  
Influencing Factors ◽  
Coastal Wetlands ◽  
Bohai Rim

INTEGRATED ALGA-CULTURE IN INUNDATED COASTAL FARMLANDS OF INDIAN SUNDARBANS AS A SUSTAINABLE ADAPTATION FOR MARGINAL COMMUNITIES TOWARDS CLIMATE RISK REDUCTION

2017 ◽  
Author(s):  
Dipayan Dey ◽  
Dipayan Dey ◽  
Ashoka Maity ◽  
Ashoka Maity
Keyword(s):  
Coastal Wetlands ◽  
Algal Growth ◽  
Open Water ◽  
Fish Bone ◽  
Algal Flora ◽  
Daily Growth Rate ◽  
Monsoon Period ◽  
Daily Growth ◽  
Culture Techniques ◽  
Tidal Waters

Algae has a great potential for quick capture of biological carbon and its storage in saltwater-inundated coastal wetlands and can also be introduced as a climate adaptive alternate farming practice. An intervention with native algal flora Enteromorpha sp. in enclosed coastal Sundarbans in India on two open water culture techniques, viz. U-Lock & Fish-Bone, shows that growth in native algal stock is influenced by seasonal variations of salinity and other limnological factors. Sundarbans, facing the odds of climate change is fast loosing arable lands to sea level rise. Algaculture in inundated coastal areas can be an adaptive mitigation for the same. Perusal of results show that daily growth rate (DGR%) increases with increasing salinity of the intruding tidal waters to an extent and biomass increment under salt stress results in accumulation of metabolites those are having nutrient values and can yield bio-diesel as well. Algal growth recorded mostly in post monsoon period, has impacts on pH and Dissolved Oxygen (DO) of the ambient water to facilitate integrated pisciculture. The paper suggests that alga-culture has unrealized potentials in carbon sequestration and can be significantly used for extraction of Biodiesel.

Monitoring multiple cropping index using MODIS NDVI data-A case study of Bohai Rim

2013 ◽  
Vol 20 (12) ◽  
pp. 1657-1663 ◽  
Author(s):  
Shou-Zhen LIANG ◽  
Wan-Dong MA ◽  
Ping SHI ◽  
Jin-Song CHEN
Keyword(s):  
Multiple Cropping ◽  
Modis Ndvi ◽  
Bohai Rim

The Development of a Turbidimetric Method for the Quantitative Determination of Antibiotics of the Aminoglycoside Group in Medications

2020 ◽  
Vol 65 (7-8) ◽  
pp. 37-41
Author(s):  
E. N. Semenova ◽  
S. I. Kuleshova ◽  
E. I. Sakanyan
Keyword(s):  
Quantitative Determination ◽  
Quality Assessment ◽  
Aminoglycoside Antibiotics ◽  
Metrological Characteristics ◽  
Streptomycin Sulfate ◽  
Turbidimetric Method ◽  
Validation Criteria ◽  
Validation Parameters ◽  
Validation Tests

A method for the quantitative determination of streptomycin sulfate in medicines by the turbidimetric method has been developedand validated. Based on the results of the experiments, it was found that the metrological characteristics of such validation parameters of the method as linearity, precision, and correctness do not exceed the validation criteria. Linearity was noted in the range of streptomycin concentrations from 3.75 to 8.43 μg/ml. The results of validation tests of the method for the quantitative determination of streptomycin indicate the prospects and feasibility of introducing the turbidimetric method into the domestic system for standardization and quality assessment of aminoglycoside antibiotics.

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