Article
Environmental Sciences
Pongpet Pongsivapai, Junjiro N. Negishi, Hokuto Izumi, Paolo A. Garrido, Kanta Kuramochi
Summary: This study found that the temporal change in sediment properties over decades was mainly driven by morphometry, while land use in the catchment played a relatively minor role. The rate of change in organic matter (OM) differed among water bodies depending on their morphometry. Small and shallow water bodies provided suitable habitat for macrophytes that led to OM deposits, resulting in an increase in OM and OM to total nitrogen (TN) ratio over time.
Article
Green & Sustainable Science & Technology
Bifei Mao, Guanghao Li, Mingmei Wang, Xiangyuan Deng, Kun Gao, Bingcong Zhang
Summary: Nitrogen starvation and excess phosphorus regulation during algae cultivation can modify the biochemical composition of algal biomass and subsequently improve butanol production from LEA.
Article
Environmental Sciences
Nathan J. Smucker, Erik M. Pilgrim, Huiyun Wu, Christopher T. Nietch, John A. Darling, Marirosa Molina, Brent R. Johnson, Lester L. Yuan
Summary: Interest in developing periphytic diatom and bacterial indicators of nutrient effects is growing, but temporal variability can complicate relationships between indicators and nutrients. This study found that while nutrient concentrations varied with agriculture in watersheds, the variability of diatom and bacterial assemblages within sites remained consistent. Weekly low and high nutrient diatom and bacterial metrics were more strongly correlated with site mean nutrient concentrations over the sampling period, and correlations with TP concentrations were consistently strong throughout the study.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Environmental Sciences
B. C. Webster, M. N. Waters, S. W. Golladay
Summary: Reservoirs, commonly found along rivers, provide a multitude of ecosystem services such as sequestering sediments and nutrients. Studies need to focus on understanding how reservoirs function individually and as part of sequences within large rivers and watersheds. Further research is needed to explore the impacts of reservoirs on nutrient deposition and their interactions within watershed-sediment-transport systems.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Environmental Sciences
Hunter J. Carrick, Christine Marble, Yong Q. Tian
Summary: Nitrogen and phosphorus enrichment from the landscape can enhance the growth and abundance of algal communities in stream ecosystems, both in the water column and as benthic biofilms. However, the impact of dissolved organic carbon (DOC) levels on algae response to nutrient enrichment is unclear. In this study, we investigated the relationship between N and P enrichment and varying DOC levels in stream reaches within a common watershed. The results showed that suspended algae responded positively to both N and P enrichment, while benthic algae biomass increased only at the lowest DOC level. These findings indicate that eutrophication in watersheds is influenced by interactions between N and P loading and DOC.
FRONTIERS IN ENVIRONMENTAL SCIENCE
(2023)
Article
Engineering, Environmental
Guining Wei, Ruoyu Yuan, Muhammad Salam, Lixue Zhang, Yanyan Wei, Bingran Tang, Xiaobing Yuan, Bingsheng Liu, Xianhuai Yu, Hong Li, Xiaojun Miao
Summary: The use of oxygen-loaded lanthanum modified zeolites (LOZ) can effectively absorb phosphorus and nitrogen from lake sediments, while improving dissolved oxygen levels and reducing the release of these nutrients into the overlying water. This approach provides a quick, efficient, and sustainable remediation method for polluted water systems.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Environmental Sciences
Toshikazu Kizuka, Hidetoshi Mikami, Satoshi Kameyama, Satoru Ono, Hiroaki Suzuki
Summary: Re-wetting of agricultural areas reclaimed by draining peatlands may lead to nutrient leaching and downstream nutrient loads. This study assessed the risks of nutrient loading in naturally re-wetted agricultural areas in floodplain fens in northern Japan. The results showed that flooding increased the water flow and nutrient influx and outflux, with dissolved organic nitrogen and phosphorus being the main contributors to downstream nutrient loading.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Review
Biotechnology & Applied Microbiology
Yevhen Maltsev, Maxim Kulikovskiy, Svetlana Maltseva
Summary: Microalgae have great value for biodiesel production due to their ability to accumulate large amounts of lipids. Adjusting the nitrogen and phosphorus content in the culture medium can change the lipid content and productivity of microalgae. However, there is no single approach to determining the experimental concentrations of nitrogen and phosphorus, which may lead to incorrect interpretations. This study systematically analyzes the effect of nitrogen and phosphorus restriction on lipid productivity of microalgae from different taxonomic and ecological groups, providing directions for future research.
MICROBIAL CELL FACTORIES
(2023)
Article
Ecology
S. W. Duiker, S. Richards
Summary: Cover cropping is a cost-effective practice to reduce nutrient losses in cropland. In Pennsylvania's Chesapeake Bay watershed, cover crops were used on 39% of the annual crop area, higher than the US average. However, commodity cover crops are not currently included in the Chesapeake Bay Model for nutrient reduction credits.
JOURNAL OF SOIL AND WATER CONSERVATION
(2023)
Article
Fisheries
Yuzhi Song, Jing Guo, Jinqi Wang
Summary: The study investigated the effect of nitrogen and phosphorus availability on periphytic algal biomass and composition in a eutrophic lake. The results showed that increasing nitrogen and phosphorus levels in the water column and water depth significantly enhanced periphytic algal biomass on artificial substrates. The development of sediment-associated periphytic algae also altered the phosphorus form in the sediments.
NEW ZEALAND JOURNAL OF MARINE AND FRESHWATER RESEARCH
(2023)
Article
Environmental Sciences
R. W. McDowell, K. A. Macintosh, C. Depree
Summary: Intensive land use, such as dairying, can impact water quality, but there is limited data on the success of implementing best management practices (BMPs) on-farm. A study in New Zealand found that water quality trend directions were either improving or showing no change during an extension period, but some contaminant concentrations did not meet regulatory threshold values, indicating the need for further action.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Chemistry, Analytical
Marcelo Bevilacqua Remor, Marcio Antonio Vilas Boas, Silvio Cesar Sampaio, Sandra Regina Damatto, Jose Candido Stevaux, Ralpho Rinaldo dos Reis
Summary: The objective of this study was to reconstruct the history of sedimentation and nutrient accumulation in the Upper Parana River floodplain. The research found that flood pulses were the main regulating factor of sedimentation rate, and nitrogen was the limiting nutrient for productivity in the system.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Engineering, Civil
Yuemin Hu, Yihui Zhang, Zhaoliang Peng, Weiping Hu
Summary: This study investigated the effects of lake currents and waves on sediment deposition and nutrient release in deep lake bottom traps. The results showed that strong hydrodynamic forces promoted sediment deposition and enhanced the trap's ability to capture sediments with high nutrient contents. Waves played a leading role in winter and spring, while lake currents were the main factor in summer. A mathematical model was established to analyze the relationship between hydrodynamics and sediment deposition.
JOURNAL OF HYDROLOGY
(2023)
Article
Ecology
Ted Ozersky, Andrew Camilleri
Summary: Research found that the growth of periphyton in lakes is mainly limited by primary N or N + P co-limitation, with more severe nutrient limitations in eutrophic lakes, supporting the different responses of phytoplankton and periphyton to nutrient enrichment. Additionally, periphyton can serve as an early warning indicator of nutrient pollution, and oligotrophic lakes are more susceptible to localized benthic algal blooms.
FRESHWATER BIOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Xiaodan Tang, Zhenghe Li, Shan He, Binghan Yang, Zeyu Zhang, Bing Li, Yuyan Zhao
Summary: This study provides a scientific reference for the investigation and treatment of nitrogen and phosphorus pollution in surface water of typical old industrial cities in China. The results showed that the pollution of nitrogen and phosphorus in the main rivers of Changchun City was serious, and their spatial distribution varied greatly. In terms of time, remarkable results have been achieved in the pollution control of ammonia and phosphorus through government river management efforts.
APPLIED SCIENCES-BASEL
(2022)