Modeling study of nonlinear dynamics in the growth of aquatic phytoplankton DOI Open Access
Qing Guo

Опубликована: Янв. 1, 2023

Phytoplankton bloom has become a growing global concern in recent years due to the excessive growth of algae, causing significant negative impacts on aquatic ecosystem and threatening human health. Growing evidence suggests that algal blooms are consequence interplay various hydrodynamical, chemical, biological processes systems. The complexity nonlinearity ecosystems, climatic hydrographic events, make interpreting predicting very challenging task. In years, many different strategies have been adopted manage blooms. Among them, mathematical models advantageous because they can capture ubiquitous stoichiometric constraints for modeling species interaction. Thus, widely used investigate dynamics phytoplankton growth. this study, five were developed based population dynamics, ecological dynamic modeling, probability theory. investigated theoretically numerically terms theory partial differential equations, stochastic impulsive numerical simulation. objective dissertation research was gain insight into plankton explore potential management main results presented as follows: Firstly, nutrient-plankton model incorporating delay diffusion developed. theoretical analysis revealed trigger oscillation via Hopf bifurcation. Especially, stability switches positive equilibrium occur with increasing delay, which indicates generate suppress unstable coexistence population. Numerical reveal indeed exist model, homogeneous multiple periodic solutions, well chaos, values implies exhibits delay-induced complex dynamics. Secondly, Leslie-Gower phytoplankton-zooplankton prey refuge dynamical sufficient conditions persistence extinction populations. simulations showed environmental noise play crucial role survival species. further demonstrate enhance range population, but variance zooplankton tends increase then decrease increased. Thirdly, considering seasonal disturbances ecosystem, nutrient-phytoplankton fluctuation indicate solutions under certain conditions, suggesting populations associated oscillations. Furthermore, promote Specifically, is more sensitive nutrient than fluctuation. Fourthly, regime-switching by mortality. admits stationary distribution conditions. Then variations input. also mortality contributes system. Finally, control established existence solutions. addition, impulse plays an important preventing controlling blooms, appropriate However, excess intensity result collapse entire ecosystem.

Язык: Английский

Prediction of ammonia contaminants in the aquaculture ponds using soft computing coupled with wavelet analysis DOI
T. Vamsi Nagaraju,

Sunil B.M.,

Babloo Chaudhary

и другие.

Environmental Pollution, Год журнала: 2023, Номер 331, С. 121924 - 121924

Опубликована: Июнь 1, 2023

Язык: Английский

Процитировано

39
Advancements in Biochar Modification for Enhanced Phosphorus Utilization in Agriculture DOI Creative Commons
Nazir Ahmed, Lifang Deng, Chuan Wang

и другие.

Land, Год журнала: 2024, Номер 13(5), С. 644 - 644

Опубликована: Май 9, 2024

The role of modified biochar in enhancing phosphorus (P) availability is gaining attention as an environmentally friendly approach to address soil P deficiency, a global agricultural challenge. Traditional phosphatic fertilizers, while essential for crop yield, are costly and detrimental owing fixation leaching. Modified presents promising alternative with improved properties such increased porosity, surface area, cation exchange capacity. This review delves into the variability based on source production methods how these can be optimized effective adsorption. By adjusting pH levels functional groups align phosphate’s zero point charge, we enhance biochar’s ability adsorb retain P, thereby increasing its bioavailability plants. integration nanotechnology advanced characterization techniques aids understanding structural nuances interactions phosphorus. offers multiple benefits: it enables farmers use more efficiently, reducing need traditional fertilizers minimizing environmental impacts, greenhouse gas emissions also identifies existing research gaps future opportunities further modifications. These findings emphasize significant potential sustainable agriculture.

Язык: Английский

Процитировано

14
Impacts of cyanobacterial metabolites on fish: Socioeconomic and environmental considerations DOI
Éryka Costa de Almeida, Larissa Souza Passos, Paloma Nathane Nunes de Freitas

и другие.

Reviews in Aquaculture, Год журнала: 2024, Номер 16(3), С. 1186 - 1211

Опубликована: Янв. 14, 2024

Abstract The increasing global population has led to rising demand for food, particularly protein. As an excellent source of protein, fish play a crucial role in meeting this demand, making aquaculture highly impactful industry. Floating cages have been developed as method management and production achieve high productivity volume. However, these intensive farming practices can contribute eutrophication, leading changes primary producers promoting the excessive proliferation cyanobacteria. Cyanobacteria blooms pose significant consequences aquatic ecosystems, including potential risks exposed harmful cyanobacterial metabolites. Cyanobacterial metabolites encompass various chemical classes, such terpenoids, carotenoids, alkaloids, cyanopeptides, amino acids, organophosphates, macrolides, lipopolysaccharides. Some compounds' toxicity impact on farms still need be better understood. Cyanotoxins off‐flavour compounds water quality health hazards humans throughout food chain. Therefore, cyanobacteria economic, environmental, public implications. This review examines concerns associated with natural products farming, off‐flavours, known cyanotoxins, other potentially toxic compounds, while exploring their socioeconomic environmental risks.

Язык: Английский

Процитировано

6
Ecology of freshwater harmful euglenophytes: A review DOI Creative Commons
Sunzida Sultana, Saleha Khan, Nowrin Akter Shaika

и другие.

Heliyon, Год журнала: 2024, Номер 10(8), С. e29625 - e29625

Опубликована: Апрель 1, 2024

A diverse array of aquatic ecosystems are inhabited by the euglenophytes, a group autotrophic and eukaryotic organisms. In inland waterbodies, red bloom is caused rapid development or accumulation euglenophytes. Recent studies have designated euglenophytes as bioindicator organic pollution. The ecology influenced changes in intensity sunlight, temperature, nutrient cycles, seasons. Most species grow prolifically with increase water temperature. Nitrogen phosphorus often thought to be main nutrients that influence cellular growth toxic high concentration required for form bloom. Heavy summer season characteristic eutrophic ponds. Inland waterbodies many countries suffer from euglenophyte blooms, which shade submerged vegetation, deplete dissolved oxygen disrupt food webs. Dense clog gills fishes, cause breathing difficulties extreme cases results mortality. Red blooms deadly toxin producing

Язык: Английский

Процитировано

6
Blue revolution turning green? A global concern of cyanobacteria and cyanotoxins in freshwater aquaculture: A literature review DOI
Damjana Drobac, Nada Tokodi

Journal of Environmental Management, Год журнала: 2024, Номер 360, С. 121115 - 121115

Опубликована: Май 14, 2024

Язык: Английский

Процитировано

6
Greenhouse Systems: A Sustainable Solution to Develop Shrimp Aquaculture Industry DOI Creative Commons
Einar Ringø,

Sherine R. Ahmed,

Zaki Z. Sharawy

и другие.

IntechOpen eBooks, Год журнала: 2025, Номер unknown

Опубликована: Фев. 28, 2025

Within the global aquaculture industry, sustainable shrimp industry is becoming more important as demand for seafood rises and expands. However, it faces several issues including environmental impact, disease, low productivity, water quality control. Recent developments in greenhouse (GS) have yielded promising solutions to address these challenges with development of industry. This chapter explores potential application GS an environmentally friendly approach Firstly, discussing limitations facing traditional open-pond farming their concerns. Then, highlights concept its unique advantages, such enhanced conditions, disease prevention, improved protocols. The components required will be reviewed. essential that are crucial efficient aquaculture. Furthermore, also integration other aquatic organisms fish, clams, seaweed, enhancing both sustainability profitability In conclusion, sector stands poised surmount existing challenges, mitigate footprint, cater escalating sustainably produced shrimp. summary, can obstacles, reduce satisfy rising production.

Язык: Английский

Процитировано

0
Dynamic Changes of Environment and Gut Microbial Community of Litopenaeus vannamei in Greenhouse Farming and Potential Mechanism of Gut Microbial Community Construction DOI Creative Commons
Hui Li,

Shuwen Gu,

Libao Wang

и другие.

Fishes, Год журнала: 2024, Номер 9(5), С. 155 - 155

Опубликована: Апрель 26, 2024

The aim of this study was to investigate the dynamic changes in microbial communities both environment and gut Litopenaeus vannamei, as well elucidate mechanisms underlying community assembly greenhouse farming. 16S rDNA high-throughput sequencing bioinformatics methods were used carry out research on structure microorganisms under culture conditions water, sediment, microorganisms; correlations pertaining environmental factors; feasibility using Source Tracker; construction. results show that dominant farming a varied subject change. A variety beneficial microbiota such Bacillus found gut, whereas Marivita Pseudomonas, which function nitrogen phosphorus removers, present water. Tracker correlation analyses showed associated with eutrophication indicators (total nitrogen, total phosphorus, ammonia nitrogen) (in water sediment). community-building mechanism analysis stochastic processes determine directions microorganisms. These findings will help us understand characteristics shrimp ponds conditions, complex interactions between variables, revealing changing rules microbiota.

Язык: Английский

Процитировано

2
Appraisal and Identification of Algal Bloom Region, Prevention and Management Approaches DOI
Anuj Sharma, Praveen Sharma, Sharma Mona

и другие.

Environmental science and engineering, Год журнала: 2024, Номер unknown, С. 79 - 90

Опубликована: Янв. 1, 2024

Язык: Английский

Процитировано

2
Microcystin-LR induces histopathological injury and cell apoptosis in the hepatopancreas of white shrimp, Litopenaeus vannamei DOI Creative Commons
Zhao Chen,

Haiqing Yuan,

Shuangyong Zhang

и другие.

Ecotoxicology and Environmental Safety, Год журнала: 2024, Номер 285, С. 117059 - 117059

Опубликована: Сен. 19, 2024

Язык: Английский

Процитировано

2
Insight in limited research on environmental factors and health implications of toxic cyanobacteria bloom in African freshwater bodies DOI Creative Commons

Nadia Elidrissi El Yallouli,

Majida Lahrouni,

Richard Mugani

и другие.

Deleted Journal, Год журнала: 2024, Номер 21(1)

Опубликована: Ноя. 20, 2024

The rapid rise of cyanotoxins production poses a serious threat to global freshwater ecosystems and has become an important issue public health. In Africa, continent facing environmental problems, including poisoning by cyanotoxins, knowledge the presence distribution these toxins remains limited. primary objective our review is assess occurrence particularly microcystins (MCs), in African ecosystems. We aim analyze limited but existing literature on this subject, focusing specifically studies published between 2001 2023. Recognizing scarcity research topic we strive elucidate emerging patterns toxin variants their correlation with variables, such as water temperature nutrient concentrations. Our investigation reveals MCs predominant cyanobacterial secondary metabolites detected across majority environments where have been documented. Furthermore, concentrations exceeded World Health Organization's (WHO) provisional guideline for lifetime human exposure through drinking water, which set at 1 µg L−1, indicated data Table 1. Highly significant positive relationships were found toxin-producing cyanobacteria factors, particular Given associated risks recommend frequent monitoring quality, development guidelines based international best practice, toxicity tests, epidemiological investigations understand health impacts cyanotoxin exposure. These measures are essential both protect well-being humans ensure sustainability aquatic

Язык: Английский

Процитировано

1