AI Article Synopsis
- The Lancang River, part of the Mekong River system, is experiencing ecological decline, particularly with aquatic ecosystems due to issues related to nutrient balance, especially phosphorus, exacerbated by hydropower station construction.
- Estimating the total phosphorus (TP) load is challenging due to limited water quality data, but the study uses socio-economic data to analyze TP distribution and sources in the river basin as of 2014.
- Findings indicate that the annual average TP load is relatively low compared to other Chinese basins, with the majority (69%) coming from natural soil erosion, while agricultural practices contribute less; TP levels increase from upstream to downstream, influenced by various environmental and human factors.
Article Abstract
Lancang River, the upstream reach of Mekong River, is a hotspot region in the sustainable management of water resources and environment as it is currently facing the deterioration of aquatic ecosystems. Nutrient balance (i.e., Phosphorus) in the Lancang-Mekong River Basin has become a highly disputed issue in recent years due to the construction of cascade hydropower stations. However, the estimation of the total phosphorus (TP) load faces great difficulties and challenges due to the absent measured water quality data. This study estimates the TP load based on the social economic data, analyzes the spatial distribution of TP and the contribution of different TP sources in the Lancang River basin under the level of social-economic development in 2014. Results show that the annual average TP load in the Lancang River Basin is 1.6 × 10-3.9 × 10 tons, which is at a very low level compared with other large-scale basins in China. The TP load from natural soil erosion dominates all other sources, accounting for 69%, followed by agricultural production and fertilization. In general, the TP load increases from upstream to downstream, but heterogeneity also exits in different regions under the influence of various factors, such as rainfall intensity, soil properties and human activities. The results reveal a holistic picture of TP load in the Lancang River Basin, which could provide a new perspective on the trans-border international river management.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.scitotenv.2020.137863 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Source-oriented risks of heavy metals and their effects on resistance genes in natural biofilms.
J Hazard Mater
November 2024
Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco-Security, Kunming 650500, China; Ministry of Education Key Laboratory for Transboundary Ecosecurity of Southwest China, Kunming 650500, China. Electronic address:
Article Synopsis
- * The study focused on analyzing biofilm samples from the Heihui River to measure the concentrations of nine heavy metals and their influence on ecological and health risks, revealing that different sources contribute to metal accumulation, with industrial activities posing the highest risks.
- * Results indicated a strong correlation between heavy metal presence and the co-occurrence of ARGs and MRGs in biofilms, highlighting that factors like arsenic concentration and water pH significantly affect the abundance and expression of these resistance genes.
[Heavy Metal Pollution Characteristics and Ecological Risk Assessment of Kafang Tin Tailings Pond].
Huan Jing Ke Xue
December 2024
Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming 650500, China.
To study the pollution characteristics and ecological risks of heavy metals in tailings ponds is an important prerequisite for protecting the surrounding environment and human health. The total amount and morphology of five "toxic" heavy metals （As, Cr, Cd, Pb, and Hg） in Kafang tin tailings pond were determined. Based on the aforementioned, we analyzed the distribution characteristics of heavy metals.
View Article and Find Full Text PDFGenetic diversity analysis and core collection construction of tea plant from the Yunnan Province of China using ddRAD sequencing.
BMC Plant Biol
December 2024
State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology Processing, Ministry of Agriculture, Anhui Agricultural University, West 130 Changjiang Road, Hefei, Anhui, 230036, People's Republic of China.
Article Synopsis
- Tea plants, primarily originating from Yunnan Province in southwestern China, show significant economic value but have unclear genetic diversity and evolutionary relationships.
- A study analyzed 468 tea accessions, revealing substantial inter- and intraspecific genetic introgression, especially the influence of Camellia taliensis in the domestication of C. sinensis.
- Genetic differences were noted across populations, likely affected by geographic barriers like the Lancang River, leading to the creation of a core collection of 50 tea accessions to aid in conservation and breeding efforts.
The comparison of the prevalence, awareness, treatment and control of hypertension among adults along the three provinces of the Lancang-Mekong River countries-China, Laos and Cambodia.
Arch Public Health
November 2024
Fuwai Yunnan Hospital, Chinese Academy of Medical Sciences, Affiliated Cardiovascular Hospital of Kunming Medical University, Kunming, China.
Background: Under the background of similar geography and culture in Lancang-Mekong countries and rapid changes in the regional economy and lifestyle, this study aimed to describe and compare the prevalence, awareness, treatment, and control of hypertension and assess the hypertension care cascade in three provinces of China, Laos, and Cambodia.
Methods: A cross-sectional study was conducted between 2021 and 2023 in the three provinces of Lancang-Mekong River countries using consistent investigative procedures. We included 11,005 participants aged ≥ 18 years from three provinces, and data were collected through questionnaires, physical examinations, and biochemical tests.
Spatial and temporal variability of physicochemical characteristics in Lancang River sediments amid hydropower development.
Sci Total Environ
December 2024
Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650500, China.
The construction of river dams disrupts river continuity and sediment transport, altering the riverbed between sediment "sources" and "sinks" and changing the sediment characteristics of the river. In this study, 256 sediment samples from 54 major control cross-sections of the Lancang River (LCR) were analyzed to examine the spatial and temporal distribution of clay and non-clay minerals in the sediment and their relationship with the environmental changes caused by the construction 11 hydropower plants. The results indicate that the construction of terrace dams on the LCR interrupted the downstream refinement trend of sediments, which reappeared once the terrace reservoirs stabilized.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!