Article
Biodiversity Conservation
Sandra Poikane, Gabor Varbiro, Martyn G. Kelly, Sebastian Birk, Geoff Phillips
Summary: The study finds significant variation in the methods used by European countries to set river nutrient thresholds, with some countries relying on expert judgement or statistical distribution, while others prefer statistical relationships based on biological variables. For the first time, an ecology-based approach is used to derive nutrient thresholds for various river types in Central Europe. The results demonstrate that adopting ecology-based nutrient targets could improve sustainable river management where nutrients are the main pressure preventing the achievement of good ecological status.
ECOLOGICAL INDICATORS
(2021)
Article
Environmental Sciences
Nolan J. T. - Pearce, James H. Larson, Mary Anne Evans, Paul C. Frost, Marguerite A. Xenopoulos
Summary: The study shows that rivermouths can effectively process nutrients bound for downstream ecosystems and respond to episodic nutrient enrichment. Light incubations exhibit higher nutrient uptake rates, with nutrient enrichment leading to increased uptake of total dissolved P and total dissolved N, as well as increased DOC release.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Environmental Sciences
James H. Larson, Mary A. Evans, Faith A. Fitzpatrick, Paul C. Frost, Marguerite A. Xenopoulos, William F. James, Paul C. Reneau
Summary: The interface between lotic and lentic ecosystems is a zone of intense metabolic activity, where rivermouths can significantly alter the load and character of nutrients passing from the tributary to nearshore areas. Sensitivity analysis of the model showed that water column processing rates become more important with increasing nutrient concentration and discharge. Simulations at the Fox rivermouth indicated that it serves as a net sink for SRP and a source for ammonia, with water column processing driving SRP removal and both water column and sediment flux driving NH4 dynamics.
Article
Environmental Sciences
Sarah Stackpoole, Robert Sabo, James Falcone, Lori Sprague
Summary: This study quantified annual changes in nitrogen and phosphorus river loads and nutrient balances at the Mississippi River outlet. It was found that the river load response to watershed nutrient balances shifted between 1975 and 2017. The impacts of legacy nutrients and other latent factors on river nutrient load trends were evaluated, showing the potential importance of factors such as best management practices and changes in watershed buffering capacity.
WATER RESOURCES RESEARCH
(2021)
Article
Environmental Sciences
Noah M. Schmadel, Judson W. Harvey, Gregory E. Schwarz
Summary: Nutrients accumulated in small catchments across the northeastern United States are released into river flow in the current season, with a significant portion of mass lagged from catchment storage repositories. A seasonally dynamic approach to large-scale nutrient modeling helps assess the effects of nutrient storage and lagged releases on rivers interacting with seasonally varying nutrient reactivity and societal management actions throughout large river basins.
ENVIRONMENTAL RESEARCH LETTERS
(2021)
Article
Environmental Sciences
Richard J. Cooper, Richard J. Warren, Sarah J. Clarke, Kevin M. Hiscock
Summary: This study evaluated the impacts of wastewater treatment plants with different classifications of tertiary treatment on nutrient dynamics in the River Wensum catchment, UK. The majority of nutrients were found in bio-available forms, with phosphorus mainly of agricultural origin. Phosphorus-stripping facilities did not reduce total P concentrations downstream of WWTPs, indicating their insufficiency in overcoming population pressures and ensuring river reaches good hydrochemical status.
SCIENCE OF THE TOTAL ENVIRONMENT
(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)
Editorial Material
Multidisciplinary Sciences
Boqiang Qin, Yunlin Zhang, Jianming Deng, Guangwei Zhu, Jianguo Liu, David P. Hamilton, Hans W. Paerl, Justin D. Brookes, Tingfeng Wu, Kai Peng, Yizhou Yao, Kan Ding, Xiaoyan Ji
Summary: China has successfully improved the water quality of rivers, but lakes still face challenges in terms of water quality. Achieving the United Nations Sustainable Development Goals requires controlling external nutrient loads and internal loads in lakes, utilizing a combination of nature-based solutions and engineered systems.
NATIONAL SCIENCE REVIEW
(2022)
Article
Green & Sustainable Science & Technology
Shannon Pace, James M. Hood, Heather Raymond, Brigitte Moneymaker, Steve W. Lyon
Summary: New technologies enable real-time monitoring of nutrients in water systems, providing valuable insights for water management and achieving water quality goals.
Review
Plant Sciences
Yuhang Zhang, Baohui Liu, Fanjiang Kong, Liyu Chen
Summary: Nutrition is a crucial factor in the growth and development of plants, particularly in terms of flowering. The process of flowering represents a transition from vegetative to reproductive stages, which requires nutrient consumption. Furthermore, nutrients such as nitrate act as signals that impact flowering. This review aims to enhance our understanding of how plant nutrition influences flowering by examining the relationships between nutrients (primarily nitrogen, phosphorus, and potassium) and the flowering process.
FRONTIERS IN PLANT SCIENCE
(2023)
Article
Environmental Sciences
F. S. Pacheco, J. P. H. B. Ometto, L. Gomes, K. Tosto, M. Miranda, S. Loverde-Oliveira, D. D. Pessi, C. Cox
Summary: The study found that phosphorus balance in cropping systems in the Vermelho River watershed in Upper Pantanal, Brazil, is positive, while in grazing systems it tends to be negative. The positive balance in cropping systems is mainly due to high phosphorus inputs from mineral fertilizers and high soil phosphorus sorbing capacities, while the negative balance in grazing systems is a result of nutrient removal without replenishment.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2021)
Article
Environmental Sciences
Sheng Ke, Zhimei Cai, Peng Zhang, Junxiao Zhang, Jibiao Zhang
Summary: The increasing riverine nutrient sources have significantly affected the ecological environment of estuaries and coastal waters, resulting in deteriorating land-sea water quality and intensified eutrophication in the Pearl River Estuary (PRE). This study examined the spatiotemporal patterns of total nitrogen (TN) and total phosphorus (TP) concentrations and river input flux in the PRE based on 2019 monitoring data. The results showed different patterns of TN and TP concentrations in the eight rivers of the PRE, and the TN and TP fluxes discharged into the PRE were significant.
FRONTIERS IN MARINE SCIENCE
(2023)
Article
Environmental Sciences
Flavia Tromboni, Walter K. Dodds, Davi G. F. Cunha, Jose A. F. Monteiro, Helene Avocat, Marcellus Caldas, Bjorn Gucker
Summary: Delineating reference riverine nutrient concentrations is crucial for understanding biogeochemical transport, describing ecological conditions, and controlling eutrophication. This study used data from 434 Brazilian watersheds to estimate pre-anthropogenic nutrient levels. The novel watershed-based approach allowed for spatial analysis and removal of anthropogenic influences, revealing distinct patterns throughout Brazil and the Amazon basin.
SCIENCE OF THE TOTAL ENVIRONMENT
(2024)
Article
Biodiversity Conservation
Nolan J. T. Pearce, Isabelle Lavoie, Kathryn E. Thomas, Patricia A. Chambers, Adam G. Yates
Summary: This study investigated how stream communities respond to cumulative human impacts such as nutrient enrichment, showing that the effects of nutrient enrichment are conditional on upstream ecosystem conditions. Future assessments may need to consider the complexities related to environmental stressors when evaluating the impacts of human activities on stream ecosystems.
ECOLOGICAL INDICATORS
(2021)
Article
Agronomy
J. Cedeno, J. J. Magan, R. B. Thompson, M. D. Fernandez, M. Gallardo
Summary: Substrate-grown crops in southern Spain make up 10% of intensive greenhouse horticulture, and their free-draining nature leads to significant nutrient loss in drainage, causing water contamination. This study examined two management approaches, ratio-based and uptake concentration-based, to reduce nutrient loss in drainage. Both strategies significantly reduced nutrient application, with ratio-based management reducing nutrient loss by 58-77% and uptake concentration-based management reducing it by 65-80%.
AGRICULTURAL WATER MANAGEMENT
(2023)