Search or ask a question

What are the different types of phosphorus found in sediment in rivers and lakes?

Best insight from top research papers

Phosphorus in sediment in rivers and lakes exists in various forms. In the southern Caspian Sea, sediment phosphorus is mainly present as calcium-bound P (CaP), with minor fractions of loosely bound P (LP), reductant soluble P (FeP), and metallic oxide-bound P (AlP) . In Baiyangdian lake, inorganic P dominates, while organic P is mainly in the form of orthophosphate monoesters . Sediments under fish farms in Jakkimvaara Bay contain labile phosphorus, influenced by seasonal feeding habits of rainbow trout . In the Pasikhan river watershed, P sources include degraded rangelands, forests, rice fields, tea gardens, and gullies, with clay particles facilitating P transfer . River sediments in a German basin have labile, moderately labile, and stable P fractions, influenced by iron and aluminum contents and land use .

Answers from top 5 papers

PDF

Open Access

More filters

Papers (5)	Insight
Posted Content•DOI Accumulation of labile phosphorus in sediments in the zone of influence of the trout farm (Lake Ladoga) 26 Feb 2023	Labile phosphorus is one type found in sediment, influenced by fish farming. It can accumulate and release back into the water column, impacting aquatic ecosystems. Other types are not specified.
Open access•Posted Content•DOI Fingerprinting of Phosphorus in river sediments using the structural equation modeling 12 Jan 2023	In river sediments, phosphorus types include contributions from degraded rangelands, gullies, rice fields, and tea gardens, with clay particles playing a significant role in phosphorus transfer.
Posted Content•DOI Spatio-temporal variations of phosphorus (P) fractions in surface sediments of the southern Caspian Sea 15 May 2023	Phosphorus fractions in sediment include loosely bound P (LP), reductant soluble P (FeP), metallic oxide-bound P (AlP), and calcium carbonate-bound P (CaP), influencing bioavailability in aquatic ecosystems.
Open access•Journal Article•DOI Legacy Phosphorus in Sediments of Lowland Waterways Stefan Koch, Ellen Iva Rosewig, Bernd Lennartz - Show less +2 more 27 Feb 2023-Environments	The phosphorus fractions found in river sediments are labile (NaOH-P), moderately labile, and stable (H2SO4-P), influencing P dynamics and potentially causing eutrophication in water bodies.
Journal Article•DOI Characteristics and distribution of phosphorus in surface sediments of a shallow lake. Ziwei Long, Ze-qiang Ji, Yuansheng Pei - Show less +2 more 01 Feb 2023-Journal of Environmental Sciences-china 9 Citations	In sediment samples from Baiyangdian lake, inorganic phosphorus (dominant), orthophosphate monoesters (organic source when redox changes), and phosphorus bound to Fe, Al, and Mn oxides were identified.

My columns

Related Questions

How does the release of human waste water impact phosphate in surface water in rivers?4 answersThe release of human waste water significantly impacts phosphate levels in surface water in rivers. Urbanization and industrialization have led to increased nutrient inputs, including phosphorus, into surface waters through both point and diffuse pathways. Phosphate mining activities have been shown to reduce surface runoff and affect water quality by releasing high concentrations of inorganic chemicals into rivers. Additionally, the endogenous release of phosphorus from urban rivers contributes to nutrient fluxes at the sediment-water interface, with higher fluxes observed under anaerobic conditions and influenced by environmental factors like pH and temperature. The total load of phosphorus in rivers is influenced by both point and diffuse sources, with changes in transport processes affecting the eventual impact on water quality and eutrophication levels.

What are the importance of phosphorus in plants nutrients?5 answersPhosphorus is crucial for plant growth and development, playing a vital role in various biochemical processes. It is essential for energy transfer, photosynthesis, cell division, and tissue development. Phosphorus is also involved in the biosynthesis of primary and secondary metabolites, impacting dry matter production, seed yield, and overall biomass. Additionally, phosphorus is indispensable for nitrogen fixation in legumes, influencing nodulation and symbiotic interactions with rhizobia. However, factors like soil pH, organic matter, and other nutrients can limit phosphorus availability for plant uptake, necessitating management practices such as liming, organic amendments, and precise fertilizer application. Understanding phosphorus dynamics in the soil-plant continuum is crucial for developing integrated phosphorus management strategies to enhance plant nutrition and sustainability.

What are the primary sources of phosphorus in the atmosphere?5 answersThe primary sources of phosphorus in the atmosphere include atmospheric dry P deposition (ADD) and organic-P from bioaerosols and dust. Atmospheric total P deposition (ATD) primarily consists of ADD, with fluxes ranging from 0.50 to 1.06 kg P hm-2 yr-1. Additionally, organic-P compounds like monophosphate esters and diesters, found in nucleotides, phospholipids, and flame retardants, contribute significantly to atmospheric phosphorus. Furthermore, the ablation of phosphorus from interplanetary dust particles entering the Earth's atmosphere also serves as a notable source of phosphorus, forming bioavailable metal phosphites that become incorporated into meteoric smoke particles. These diverse sources highlight the complexity of phosphorus cycling in the atmosphere, emphasizing the importance of understanding and managing these inputs for environmental and ecological considerations.

What are the primary sources of phosphorus in nature?5 answersPhosphorus in nature primarily originates from the weathering of primary minerals like apatites found in rocks globally. Phosphorite minerals, a crucial natural source of phosphorus, are extensively used in agriculture, pottery, and animal feed, emphasizing their significance in providing phosphorus for various applications. Furthermore, phosphorus exists in different soluble and adsorbed forms in soil, sediment, and water, with most species being immobile and easily adsorbed onto soil particles. The presence of phosphorus in cosmic sites like meteorites, cometary dust, and planetary atmospheres also contributes to its ubiquity in the solar system, suggesting comets as potential primary sources for phosphorus compounds of prebiotic interest. Overall, the primary sources of phosphorus in nature include mineral weathering, phosphorite minerals, and cosmic sources like comets.

How are heavy metals absorbed by river sediments?5 answersHeavy metals are absorbed by river sediments through sedimentation and adsorption processes. Once heavy metals are released into the water, they accumulate in the sediments due to their toxic, persistent, and non-degradable nature. The adsorption of heavy metals in sediments is influenced by various factors such as the mineralogical composition of sediments, specific surface area, and cation exchange capacity. Different heavy metals have different adsorption characteristics, with Cd and Pb showing stronger absorbability than Cr in sediments. The properties of the medium, such as pH, also play a significant role in the adsorption of heavy metals. Additionally, anthropogenic activities, biological disturbances, and water movement can disrupt the adsorption balance, causing heavy metals to resuspend into the overlying water. Overall, understanding the absorption mechanisms of heavy metals in river sediments is crucial for assessing their pollution levels and developing effective strategies for prevention and control.

Is phosphorus a good nutrient for freshwater fish growth?3 answersPhosphorus is an important nutrient for freshwater fish growth. The concentration of phosphorus in fish varies across species, but it has been found to be significantly higher in tilapia compared to other species such as grass carp and common carp. Fish are capable of utilizing phosphorus directly from the water, but dietary intake is the main source of phosphorus for growth and metabolic requirements. In studies examining the water quality of fish farms, phosphorus was found to be a limiting factor for phytoplankton growth, indicating its importance in the aquatic ecosystem. Additionally, the invention of nutrient-rich feeds for freshwater fish includes calcium hydrogen phosphate as one of the components, which suggests the importance of phosphorus in promoting fish growth and improving their overall health. Therefore, phosphorus is indeed a good nutrient for freshwater fish growth.

See what other people are reading

What are the current production levels and trends in the dairy sector in Sri Lanka?

The dairy sector in Sri Lanka is experiencing increasing trends in milking cow and buffalo populations, as well as milk production over the years. However, there are challenges in meeting dietary requirements for dairy cattle due to low-quality forages, leading to shortfalls in energy and protein intake. Despite these challenges, small-scale dairy processing plays a crucial role in marketing dairy products, particularly curd made from buffalo milk, known as Meekiri, and cow milk, known as Deekiri. Quality issues have been raised regarding milk production in certain areas, with microbiological and compositional quality concerns in both household and bulk milk samples. Overall, there is a need for policy interventions to improve milk quality, enhance feed quality, and capitalize on the potential of buffalo milk production to boost the dairy sector in Sri Lanka.Sleep deprivation in academic perforamce of srudents in the philippines?

Sleep deprivation has been found to impact academic performance among students in the Philippines. Studies on various student populations, including grade 12 STEAM students, 2nd-year education students, medical students, elementary school students, and undergraduate students, have shown correlations between lack of sleep and academic outcomes. While some studies suggest a negative impact on cognitive functions, attention span, and grades due to sleep deprivation, others indicate that the relationship between sleepiness and academic performance may not always be significant. Strategies such as improving sleep hygiene and time management have been recommended to mitigate the effects of sleep deprivation on academic success among students in the Philippines.How climate effects students academic performance Disussion?

Climate, both in terms of school climate and environmental climate change, significantly impacts students' academic performance. Positive school climate, characterized by safety and support, predicts higher academic achievement in elementary and middle school, while academic success in high school predicts later school-climate perceptions. Additionally, students' perceptions of positive and negative school climate influence their academic performance and risk behaviors, with a higher perception of positive school climate correlating with better academic outcomes. Moreover, the punctuality of students and classroom discipline play crucial roles in explaining good academic performance across different countries. Lastly, disciplinary behavior directly affects students' competence levels and partially mediates the impact of socioeconomic background on academic achievement.What is the minimum light intensity that inhibit diatom growth?

The minimum light intensity that inhibits diatom growth varies among different species. For example, in the case of Nitzschia palea, it was observed that light intensities below 0.03 cal/cm2 min limited growth significantly. On the other hand, for Chaetoceros sp. and Thalassiosira sp., relatively high specific growth rates were recognized under low irradiances, indicating that they can grow efficiently even under low light conditions. Additionally, the study on the marine diatom Amphora sp. showed that at light intensities greater than saturation, photosynthetic CO2 fixation was depressed, indicating a negative impact on growth. Therefore, the minimum light intensity that inhibits diatom growth can be species-specific and influenced by factors such as light saturation levels and photosynthetic performance under different light conditions.What is the effect of a couples who hada long term relationship but end up being cheated on?

Couples in long-term relationships who experience infidelity may undergo various emotional and relational dynamics. Research suggests that infidelity is often preceded by a decline in relationship functioning, leading to emotional alienation and dissatisfaction in the couple. The emotional impact of infidelity differs between genders, with men being more affected by sexual infidelity and women by emotional infidelity, resulting in feelings of anger, depression, and low self-esteem akin to posttraumatic stress disorder. Couple therapy for older individuals in long-term relationships post-infidelity focuses on emotional safeness, attachment, and constructive conflict management, emphasizing emotion regulation strategies tailored to age-related strengths and vulnerabilities. Overall, infidelity in long-term relationships can lead to significant emotional distress and necessitate specialized therapeutic interventions to rebuild trust and emotional wellbeing.What is the tragedy of the commons?

The tragedy of the commons refers to the overuse or exploitation of shared resources due to individual self-interest, leading to detrimental outcomes for the overall population. This concept is observed in various scenarios, such as spatially distributed harvesting games involving fishermen, competition among cancer cells for resources like glucose, and illegal sand mining activities in communities surrounding geoparks. The phenomenon highlights how individual actions driven by self-interest can collectively deplete or harm common resources, emphasizing the importance of cooperation, regulation, and sustainable practices to avoid negative consequences on the environment or society.How Pseudomonas aeruginosa forms biofilm?

Pseudomonas aeruginosa forms biofilms through various mechanisms. It can be attracted to biofilms through potassium currents from the biofilms themselves. Additionally, P. aeruginosa actively contracts mucus using retractile filaments, promoting biofilm formation within hours by nucleating biofilms. The bacterium utilizes fibrillar adhesins like CdrA to promote bacterial aggregation and biofilm formation. Furthermore, the physical properties of the substrate play a crucial role in regulating P. aeruginosa biofilm architecture, with hydrogel mesh size affecting twitching motility and biofilm organization, ultimately impacting antibiotic tolerance. Finally, P. aeruginosa's quorum-sensing system and arsenal of virulence factors, including biofilms with enhanced resistance to antibiotics, contribute significantly to its ability to form biofilms in various environments.Why Pseudomonas aeruginosa forms biofilm?

Pseudomonas aeruginosa forms biofilms as a survival strategy in various environments, including chronic infections. The biofilm formation is influenced by multiple factors. Firstly, P. aeruginosa can sense and respond to potassium efflux from human airway epithelial cells, promoting biofilm biogenesis. Secondly, the physical properties of the substrate, such as hydrogel mesh size, regulate twitching motility and biofilm architecture, impacting antibiotic tolerance. Additionally, in the respiratory tract, P. aeruginosa actively contracts mucus using type IV pili, facilitating biofilm formation within hours. Moreover, the bacterium utilizes fibrillar adhesins like CdrA to promote bacterial aggregation and biofilm formation, regulated by c-di-GMP signaling. Overall, biofilm formation by P. aeruginosa is a complex process influenced by host-pathogen interactions, material properties, mucus dynamics, and specific bacterial adhesins.What are the disease caused by rice weevils in plants?

Rice weevils, such as Oryzophagus oryzae, are major pests causing damage to rice plants. They are not known to cause diseases in plants but rather physical damage. However, other pathogens like fungal infections can lead to diseases in rice crops. These include bacterial blight, rice blast, aggregate sheath spot, black kernel brown spot, downy mildew, and false smut. Additionally, diseases like rice tungro disease caused by a viral complex of Rice tungro bacilliform virus and Rice tungro spherical virus can infect rice plants through green leafhoppers. Furthermore, fungal diseases like rice blast caused by Magnaporthe grisea can severely impact rice yield globally. It's crucial to manage both weevil populations and these diseases to ensure healthy rice crops and sustainable yields.How cost affect the profitability of a business specifically in poultry farms?

Costs play a crucial role in determining the profitability of poultry farms.High feed costs, which can account for a significant portion of the total production cost, pose a major challenge to profitability. Additionally, factors such as energy needs, input prices, and operational expenses impact the overall cost structure of poultry enterprises. Efficient cost management is essential to ensure a positive net income. Proper budgeting, control of variable costs like feed, labor, and utilities, and strategic decision-making regarding flock size and production processes are vital to enhancing profitability. Understanding the cost dynamics and implementing measures to optimize expenses are key strategies for maintaining a profitable poultry business amidst fluctuating market conditions and input price variations.How does Enterocytozoon hepatopenaei impact the digestive system of shrimp?

Enterocytozoon hepatopenaei (EHP) infection significantly alters the intestinal flora of shrimp, impacting their digestive system. The presence of EHP, an emerging pathogen, leads to a decrease in intestinal flora diversity, with infected shrimp showing a shift towards pathogenic bacteria dominance compared to beneficial bacteria. Studies indicate that EHP infection affects the hormonal regulation in shrimp, with differential gene expression related to ecdysis pathways, thyroid hormone signaling, and steroid hormone biosynthesis. Furthermore, EHP infection causes a cyclic pattern of infection intensity, leading to a decrease in beneficial microorganisms and an increase in opportunistic/pathogenic fungi and bacteria in the shrimp gut microbiome over the course of disease progression. These findings highlight the detrimental impact of EHP on the digestive system of shrimp, emphasizing the need for further research on controlling EHP infections in aquaculture.