scholarly journals Metagenomic data of bacterial community from different land uses at the river basin, Kelantan

Data in Brief ◽  
2020 ◽  
Vol 33 ◽  
pp. 106351 ◽  
Author(s):  
Rennielyn Rupert ◽  
Grace Joy Chin Wei Lie ◽  
Daisy Vanitha John ◽  
Kogila Vani Annammala ◽  
Jaeyres Jani ◽  
...  
Keyword(s):  
Bacterial Community ◽  
River Basin ◽  
Metagenomic Data ◽  
Land Uses

scholarly journals Effects of soil pH and texture on soil carbon and nitrogen in soil profiles under different land uses in Mun River Basin, Northeast Thailand

PeerJ ◽  
2019 ◽  
Vol 7 ◽  
pp. e7880 ◽  
Author(s):  
Wenxiang Zhou ◽  
Guilin Han ◽  
Man Liu ◽  
Xiaoqiang Li
Keyword(s):  
Soil Carbon ◽  
River Basin ◽  
Soil Ph ◽  
Soil Samples ◽  
Soil Profiles ◽  
Land Uses ◽  
Agricultural Lands ◽  
Carbon And Nitrogen ◽  
Soil Carbon And Nitrogen ◽  
Forest Lands

Soil carbon and nitrogen are essential factors for agricultural production and climate changes. A total of 106 soil samples from three agricultural lands (including two rice fields and one sugarcane field) and four non-agricultural lands (including two forest lands, one wasteland and one built-up land) in the Mun River Basin were collected to determine soil carbon, nitrogen, soil pH, soil particle sizes and explore the influence of pH and soil texture on soil C and N. The results show that total organic carbon (TOC) and nitrogen (TON) contents in topsoil (TOC: 2.78 ~ 18.83 g kg−1; TON: 0.48 ~ 2.05 g kg−1) are much higher than those in deep soil (TOC: 0.35 ~ 6.08 g kg−1; TON: <0.99 g kg−1). In topsoil, their contents of forest lands and croplands (TOC: average 15.37 g kg−1; TON: average 1.29 g kg−1) are higher than those of other land uses (TOC: average 5.28 g kg−1; TON: average 0.38 g kg−1). The pH values range from 4.2 to 6.1 in topsoil, and with increase in soil depth, they tend to increase and then decrease. Soil carbon, nitrogen and the C/N (TC/TN ratio) are negatively correlated with soil pH, demonstrating that relatively low pH benefits the accumulation of organic matter. Most soil samples are considered as sandy loam and silt loam from the percentages of clay, silt and sand. For soil profiles below 50 cm, the TOC and TON average contents of soil samples which contain more clay and silt are higher than those of other soil samples.

scholarly journals Ponding time in infiltration process for different land use

2021 ◽  
Vol 930 (1) ◽  
pp. 012054
Author(s):  
I K Hidayati ◽  
Suhardjono ◽  
D Harisuseno ◽  
A Suharyanto
Keyword(s):  
Land Use ◽  
Physical Properties ◽  
River Basin ◽  
Sugar Cane ◽  
Infiltration Rate ◽  
Soil Types ◽  
Land Uses ◽  
Infiltration Process ◽  
Double Ring ◽  
Density Values

Abstract Ponding time is the period from the beginning of rainfall/infiltration until the occurrence of ponding. This paper aims to determine the infiltration rate and ponding time on different land uses, such as open fields, residential, agriculture, and vegetation. This research was conducted in one of the watersheds in the Brantas River Basin, namely the Lesti River Basin, which is administratively included in the Malang Regency, East Java. The Lesti River is one of the tributaries of the Brantas River, which originates around Mount Semeru, a very intensive area for planting rice, sugar cane, and coffee. Infiltration data were collected at 35 points using a double-ring infiltrometer spread across the Lesti watershed with Andosol, Mediterranean, and Regosol soil types. At the same time, ponding time was obtained from infiltration measurements in the field using the flooding method. The physical properties of the soils were tested in the laboratory to obtain water content, porosity, and bulk density values. This study resulted in the infiltration rate and ponding time for each land use and shows how the physical properties of the soil affect the ponding time.

scholarly journals Uncovering the Structure and Function of Microbial Communities Formed During Periodic Tilling of TNT and DNT Co-Contaminated Soils

2020 ◽  
Author(s):  
Saeed Keshani Langroodi ◽  
Yemin Lan ◽  
Ben Stenuit ◽  
Gail Rosen ◽  
Joseph B Hughes ◽  
...  
Keyword(s):  
Microbial Community ◽  
Bacterial Community ◽  
Contaminated Soils ◽  
Bacterial Community Composition ◽  
Amplicon Sequencing ◽  
Metagenomic Data ◽  
Military Conflict ◽  
Nitro Explosives ◽  
And Function ◽  
Aerobic And Anaerobic

Environmental contamination by 2,4,6-trinitrotoluene (TNT), historically the most widely used secondary explosive, is a long-standing problem in former military conflict areas and at manufacturing and decommissioning plants. In field test plots at a former explosives manufacturing site, removal of TNT and dinitrotoluenes (DNTs) was observed following periods of tillage. Since tilling of soils has previously been shown to alter the microbial community, this study was aimed at understanding how the microbial community is altered in soils with historical contamination of nitro explosives from the former Barksdale TNT plant. Samples of untilled pristine soils, untilled TNT-contaminated soils and tilled TNT-contaminated soils were subjected to targeted amplicon sequencing of 16S ribosomal RNA genes in order to compare the structure of their bacterial communities. In addition, metagenomic data generated from the TNT tilled soil was used to understand the potential functions of the bacterial community relevant to nitroaromatic degradation. While the biodiversity dropped and the Burkholderiales order became dominant in both tilled and untilled soil regardless of tillage, the bacterial community composition at finer taxonomic levels revealed a greater difference between the two treatments. Functional analysis of metagenome assembled genome (MAG) bins through systematic review of commonly proposed DNT and TNT biotransformation pathways suggested that both aerobic and anaerobic degradation pathways were present. A proposed pathway that considers both aerobic and anaerobic steps in the degradation of TNT in the scenario of the tilled contaminated soils is presented.

Adapting Water Scarcity for River Basin: Optimization of Land Uses

2019 ◽  
pp. 119-150
Author(s):  
Zhihui Li ◽  
Xiangzheng Deng ◽  
Aisha Arowolo ◽  
Qunou Jiang ◽  
Haiming Yan
Keyword(s):  
River Basin ◽  
Water Scarcity ◽  
Land Uses

scholarly journals Effects of Opened and Closed Spillway Operations of a Large Tropical Hydroelectric Dam on the Water Quality of the Downstream River

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Fiona-Annilow Wera ◽  
Teck-Yee Ling ◽  
Lee Nyanti ◽  
Siong-Fong Sim ◽  
Jongkar Grinang
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Aquatic Organisms ◽  
Quality Parameters ◽  
Regulated River ◽  
Land Uses ◽  
Hydroelectric Dam ◽  
Water Ph ◽  
The Impact

Water quality downstream of a hydroelectric dam is potentially affected by dam operations and other land uses in the river basin. Previous short-distance studies below the large Bakun Dam indicated poorer water quality during closed spillway. However, the extent of the impact is still unknown. Such knowledge is essential for mitigating the impact of the dam. Thus, the objectives of this study were to determine the water quality up to a distance of 210 km under two spillway operations, namely, closed and opened spillways, and also to determine the changes in water quality from the predam condition. Physicochemical parameters were measured at 15 stations along the Rajang River. Results of this preliminary study indicated that there were significant differences in eight out of nine water quality parameters between opened and closed spillway operations with opened spillway showing better water quality. During closed spillway, as we approached the dam, there was an increasing acidity and a decreasing oxygen content. Furthermore, as the water flows downstream, the unhealthy DO level (<5 mg/L) extended up to 165 km and the linear model showed an increasing DO rate of 0.09 mg/L per km. With opened spillway, DO decreased exponentially from 9.74 mg/L towards the downstream direction to 7.67 mg/L. The increasing turbidity and TSS in the downstream direction indicate contributions from erosion due to other land uses. The river is polluted with organics as indicated by COD of Class IV or V with sources from the dam and the activities in the river basin. Compared to the predam condition, the regulated river is less turbid but warmer and higher in ammonia. Closed spillway led to lower DO and acidic water. However, opened spillway water pH and DO were similar to those in the predam condition. Thus, it is recommended that DO be consistently high enough for the health of sensitive aquatic organisms downstream.

scholarly journals Dataset supporting description of the new mussel species of genus Gigantidas (Bivalvia: Mytilidae) and metagenomic data of bacterial community in the host mussel gill tissue

Data in Brief ◽  
2020 ◽  
Vol 30 ◽  
pp. 105651 ◽  
Author(s):  
Sook-Jin Jang ◽  
Phuong-Thao Ho ◽  
Si-Yeong Jun ◽  
Dongsung Kim ◽  
Yong-Jin Won
Keyword(s):  
Bacterial Community ◽  
Gill Tissue ◽  
Metagenomic Data ◽  
Mussel Species

scholarly journals Distribution and Influence on the Microbial Ecological Relationship of Antibiotic Resistance Genes in Soil at a Watershed Scale

2021 ◽  
Vol 13 (17) ◽  
pp. 9748
Author(s):  
Yi-Long Hao ◽  
Gang Li ◽  
Zu-Fei Xiao ◽  
Ning Liu ◽  
Muhammad Azeem ◽  
...  
Keyword(s):  
Antibiotic Resistance ◽  
Bacterial Community ◽  
Soil Properties ◽  
River Basin ◽  
Resistance Genes ◽  
Toxic Metals ◽  
Antibiotic Resistance Genes ◽  
Watershed Scale ◽  
Macro Scale ◽  
Ecological Relationship

Antibiotic resistance genes (ARGs) are ubiquitous in the environment, with previous studies mainly focusing on the terrestrial ecosystem, which is prone to higher antibiotic application. However, the characteristics, distribution pattern, and driving factors of soil ARGs at the macro scale are still unclear. In this study, the soil ARGs, antibiotics, mobile genetic elements (MGEs), soil properties, toxic metals, polycyclic aromatic hydrocarbons (PAHs), and bacterial community in the Taipu River Basin were analyzed to investigate the distribution and dissemination of ARGs at a watershed scale. The results revealed that ARGs were widespread in the soils along the Taipu River, and that ARG profiles varied greatly with different types of land use, but showed regional similarities. The characteristics were mainly determined by antibiotic input and the ARG transmission mediated by MGEs. The order of the contribution of environmental factors to ARG distribution was toxic metals > PAHs > soil properties. Toxic metal pollution was coupled with ARGs through MGE mediation, while PAHs and soil properties were most likely to affect the ARG distribution by shifting the bacterial community. The microbial–ecological relationship changed significantly with the enrichment of ARGs, and its impact may extend to the watershed scale. Transposon IS1247 can be used as an indicator of the ARGs impact on the microbial ecological relationship in the soils of the Taipu River Basin.

Impact of suspended sediment and nutrient loading from land uses against water quality in the Hii River basin, Japan

2012 ◽  
Vol 450-451 ◽  
pp. 25-35 ◽  
Author(s):  
H. Somura ◽  
I. Takeda ◽  
J.G. Arnold ◽  
Y. Mori ◽  
J. Jeong ◽  
...  
Keyword(s):  
Water Quality ◽  
Suspended Sediment ◽  
River Basin ◽  
Nutrient Loading ◽  
Land Uses
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