Results 81 to 90 of about 229,504 (333)

Phosphorus fractions status of representative agricultural fields in North Carolina

Journal of Environmental Quality, EarlyView.
Abstract Most agricultural soils in North Carolina have high levels of available phosphorus (P), yet little is known about other accumulated P fractions and their associated environmental risks. This study characterized soil P fractions through sequential chemical fractionation of 391 samples (0–10 cm and 10–20 cm) collected from 57 counties across ...
Andria Paula Lima, Luke Gatiboni, Dionata Filippi, Tales Tiecher   +3 more
wiley   +1 more source

A novel algal bloom risk assessment framework by integrating environmental factors based on explainable machine learning

Ecological Informatics
In recent years, the algal blooms have intensified, posing mounting threats to aquatic ecosystems and water security. However, most previous studies merely detected algal blooms according to the characteristics of the water body at the time of algal ...
Lingfang Gao, Yulin Shangguan, Zhong Sun, Qiaohui Shen, Lianqing Zhou   +4 more
doaj   +1 more source

A Copula-based Method for River Ecological Flow Quantification and Algal Bloom Risk Assessment in the Hanjiang River [PDF]

长江科学院院报
[Objective] Riverine ecological flow quantification is essential for maintaining riverine ecological health. Traditional methods often overlook the joint risks of hydrological and ecological factors and tend to rely on single-scenario calculations.
NONG Xi-zhi, LAI Cheng, JING Zheng, YE Ye
doaj   +1 more source

Algal Bloom Exacerbates Hydrogen Sulfide and Methylmercury Contamination in the Emblematic High-Altitude Lake Titicaca

Géosciences, 2018
Algal blooms occurrence is increasing around the globe. However, algal blooms are uncommon in dominantly oligotrophic high-altitude lakes. Lake Titicaca, the largest freshwater lake in South America, located at 3809 m above the sea level, experienced its
D. Achá, S. Guédron, D. Amouroux, D. Point, X. Lazzaro, P. Fernandez, G. Sarret   +6 more
semanticscholar   +1 more source

Glass half full: A framework for setting realistic water quality conservation targets

Journal of Environmental Quality, EarlyView.
Abstract A case study was launched to quantify potential water quality benefits attainable through practical and realistic conservation implementation targets. The Lake Michigan Basin was selected because of its importance as a dairy, grain, and oilseed production region that supports a range of ecosystems and endangered species.
Haleigh Summers, James O. Eckberg, Heidi M. Peterson   +2 more
wiley   +1 more source

Fourteen-Year Record (2000–2013) of the Spatial and Temporal Dynamics of Floating Algae Blooms in Lake Chaohu, Observed from Time Series of MODIS Images

Remote Sensing, 2015
As the fifth largest freshwater lake in China, Lake Chaohu has drawn increasing attention due to the decline in water quality and the occurrence of massive algal blooms. We applied an algae pixel-growing algorithm to MODIS Terra or Aqua data (2100 images)
Yuchao Zhang, Ronghua Ma, Min Zhang, Hongtao Duan, Steven Loiselle, Jinduo Xu   +5 more
doaj   +1 more source

Shallow‐lake sediments release nutrients by complete destratification events

Journal of Environmental Quality, EarlyView.
Abstract The development of phytoplankton communities in hypereutrophic shallow lakes, often used for aquaculture, is not fully understood and can sometimes be unpredictable. Focusing on the abiotic factors that regulate their succession, we recorded short‐term mixing events in a shallow lake and examined their relationship with nutrient release from ...
Jiří Jan, Felipe Breton, Jakub Borovec
wiley   +1 more source

Trend of harmful algal bloom dynamics from GOCI observed diurnal variation of chlorophyll a off Southeast coast of China

Frontiers in Marine Science
Timely and accurate observations of harmful algal blooms dynamics help to coordinate coastal protection and reduce the damage in advance. To date, predicting changes in the spatial distribution of algal blooms has been challenging due to the lack of ...
Yuying Xu, Yuying Xu, Yuying Xu, Yuying Xu, Jianyu Chen, Jianyu Chen, Jianyu Chen, Qingjie Yang, Xiaoyi Jiang, Yu Fu, Delu Pan, Delu Pan   +11 more
doaj   +1 more source

Harmful Freshwater Algal Blooms, With an Emphasis on Cyanobacteria [PDF]

The Scientific World JOURNAL, 2001
Suspended algae, or phytoplankton, are the prime source of organic matter supporting food webs in freshwater ecosystems. Phytoplankton productivity is reliant on adequate nutrient supplies; however, increasing rates of nutrient supply, much of it manmade, fuels accelerating primary production or eutrophication.
Rolland S. Fulton, Hans W. Paerl, Julianne Dyble, Pia H. Moisander   +3 more
openaire   +3 more sources

Nutrient pulse scenarios drive contrasting patterns in the functional stability of freshwater phytoplankton

Limnology and Oceanography, EarlyView.
Abstract Climate change is increasing the frequency, intensity, and stochasticity of extreme weather events such as heavy rainfall, storm‐induced mixing, or prolonged drought periods. This results in more variable regimes of dissolved nutrients and carbon in lakes and induces temporal fluctuations in the resource availability for plankton communities ...
Anika Happe, Bence Buttyán, Bence Gergácz, Silke Langenheder, Stella A. Berger, Jens C. Nejstgaard, Maren Striebel   +6 more
wiley   +1 more source