Assessing phytoplankton populations and their relation to water parameters as early alerts and biological indicators of the aquatic pollution

Ecological Indicators, Journal Year: 2024, Volume and Issue: 159, P. 111721 - 111721

Published: Feb. 1, 2024

Biological water quality is one of the main indicators pollution. The objective current study was to assess El-Temsah Lake, Egypt, in 2018 using phytoplankton and physicochemical indices (e.g. species richness, diversity, equitability, Palmer indices). Spatio-seasonal variability phytoplanktons, qualitative status physiochemical parameters assessed 20 sample sites Lake during winter summer seasons 2018. Our results indicated that abundance comprised 105 from 69 genera 101 68 winter. Navicula cryptocephala Kützing predominant both seasons, especially middle lake. Phytoplankton quantity negatively relates pH, temperature, total dissolved solids but positively related nitrate silicate level according Pearson correlation coefficient analysis. Summer season recorded higher equitability than According Shannon diversity Margalef indices, moderate pollution levels. In conclusion, Genus Palmer's Index values at north were range summer, implying a high probability organic these sites. Thus, immediate action required instantly retrieve good Lake's aquatic ecosystem. findings this research offered reference for analyzing composition distribution communities, nutrient status, levels as well other comparable lakes.

Language: Английский

---

Behavioural responses of fishes to anthropogenic disturbances: Adaptive value and ecological consequences

Journal of Fish Biology, Journal Year: 2023, Volume and Issue: 103(4), P. 773 - 783

Published: Jan. 17, 2023

Aquatic ecosystems are changing at an accelerating rate because of human activities. The changes alter the abundance and distribution fishes, with potential consequences for ecosystem structure function. Behavioural responses often underlie these in population dynamics, such as altered habitat choice or foraging activity. Here, we present a framework understanding how why behaviour is affected by activities behavioural turn influence higher ecological levels. We further review literature to assess state field identify gaps our knowledge. begin discussing factors that determine individual responds change environment whether response adaptive not. In particular, explain importance evolutionary history species. then search current knowledge impact disturbances on fishes ecosystems. reveals much attention has been directed but worryingly little known about populations, communities Yet, can have profound given underly many, if not most, species interactions. Thus, more should be paid mechanisms pathways through which Such information needed ultimate effects biodiversity function stability aquatic

Language: Английский

---

An integrated DFT calculation and adsorption study of desiccated coconut waste-based biochar in CO2 environment

Biomass Conversion and Biorefinery, Journal Year: 2024, Volume and Issue: 15(4), P. 5961 - 5973

Published: Jan. 29, 2024

Language: Английский

---

A comprehensive dataset on spatiotemporal variation of microbial plankton communities in the Baltic Sea

Scientific Data, Journal Year: 2024, Volume and Issue: 11(1)

Published: Jan. 2, 2024

The Baltic Sea is one of the largest brackish water environments on earth and characterised by pronounced physicochemical gradients seasonal dynamics. Although has a long history microscopy-based plankton monitoring, DNA-based metabarcoding so far mainly been limited to individual transect cruises or time-series single stations. Here we report dataset covering spatiotemporal variation in prokaryotic eukaryotic microbial communities parameters. Within 13-months between January 2019 February 2020, 341 samples were collected at 22 stations during monthly along salinity gradient. Both seasonality are strongly reflected data. Since was generated with both methods, it provides unique opportunities for technical ecological analyses, valuable biodiversity reference future studies, prospect climate change.

Language: Английский

---

Wide ecological niches ensure frequent harmful dinoflagellate blooms

Heliyon, Journal Year: 2024, Volume and Issue: 10(4), P. e26495 - e26495

Published: Feb. 1, 2024

Harmful algal blooms (HABs) and their consequences cause multiple devastating effects in various freshwater, brackish marine ecosystems. However, HAB species at moderate population densities have positive ecological roles as primary producers of organic matter food for zooplankton fish. They also enhance benthic-pelagic coupling participate the biogeochemical cycles. The HABs are transported across conventional environmental boundaries by numerous cascade webs beyond. Meanwhile, forecasts bloom events still limited, largely because scarcity reliable information on niches bloom-forming algae. To fill up this knowledge gap, study focused dinoflagellates, a diverse group mostly photosynthesizing protists (unicellular eukaryotes) capable mixotrophy, since they play key role production formation waters worldwide. In study, 17 abundant dinoflagellate from coastal regions southern Baltic Sea were identified first time. It was hypothesized that wider ensure more frequent compared to with narrower niches. This hypothesis verified using long-term (44 years) database phytoplankton abundance physical-chemical characteristics environment. analyzed 4534 datasets collected 1972 2016. Fourteen abiotic parameters (water temperature, salinity, Secchi depth, pH, Chl a, concentration basic nutrients) considered niche dimensions. Principal Component Analysis presented dissolved inorganic nitrogen, total temperature principal dimensions dinoflagellates. criteria refined. time proved statistically frequency robustly correlated width

Language: Английский

---

Climate Change Impact on Plant Pathogen Emergence: Artificial Intelligence (AI) Approach

Published: Jan. 1, 2024

Food is among the basic necessities of human life, and over last decade global food supplies are facing severe challenge in form growing population, increasing disease infestation, resource constraint, climate change. At same time demands expected to increase by around 35–56% middle century. All this forecasts a dark image for security coming decades. Plant pathogens responsible significant losses major crops including wheat, rice, maize, soybean, potato (up 41% losses). In addition this, change making things even worse as fluctuation climatic patterns result breeding invasion unorthodox insects (collectively termed pests) which can lead reduction crop yields. Early detection forecasting these evolving essential management avoid infestations. Recent advances artificial intelligence (AI) technology have potential deal with many challenges; massive weather imagery dataset be collected worldwide analyzed using deep-AI models. This will ultimately provide real-time information regarding changing spatial-temporal dynamics pests alert policymakers, producers, businesses develop integrated strategy mitigation pest infestation.

Language: Английский

---

Zooplankton Dominance Shift in Response to Climate-Driven Salinity Change: A Mesocosm Study

Frontiers in Marine Science, Journal Year: 2022, Volume and Issue: 9

Published: June 3, 2022

Climate change predictions indicate global changes in salinity with negative implications for plankton food webs; an important baseline functioning of marine ecosystems. Current understanding how will impact communities is mostly limited to the salinization freshwater environments, little known about effects changing systems. In this study, we investigate effect on zooplankton under different scenarios Baltic Sea. Projections future derived from regional physical-biogeochemical models were used set-up outdoor mesocosm experiment coastal area Gulf Finland. Each was inoculated natural using a mixture both and communities, mimicking influx species rivers into Zooplankton diversity composition changed possibly due tolerances among species. Among zooplankton, rotifers dominated low salinities (74%) cladocerans copepods (69%) high salinities. Our results suggest that community shift rotifer areas declining intolerance other groups freshening.

Language: Английский

---

Current status of carbon monoxide dehydrogenases (CODH) and their potential for electrochemical applications

Bioresources and Bioprocessing, Journal Year: 2023, Volume and Issue: 10(1)

Published: Nov. 27, 2023

Abstract Anthropogenic carbon dioxide (CO 2 ) levels are rising to alarming concentrations in earth’s atmosphere, causing adverse effects and global climate changes. In the last century, innovative research on CO reduction using chemical, photochemical, electrochemical enzymatic approaches has been addressed. particular, natural conversion serves as a model for many processes extensive studies microbes enzymes regarding redox reactions involving have already conducted. this review we focus of monoxide (CO) chemical downstream production render particularly attractive key intermediate. We briefly discuss different currently known autotrophic fixation pathways, focusing reversible reaction , two electrons protons water, catalyzed by dehydrogenases (CODHs). then move classify type CODHs, involved coupled metabolisms. Finally, applications CODH photochemical cells harness from environment transforming it into commodity chemicals.

Language: Английский

---

Recreational land use contributes to the loss of marine biodiversity

People and Nature, Journal Year: 2023, Volume and Issue: 6(5), P. 1758 - 1773

Published: Jan. 30, 2023

Abstract Coastal areas are at the centre of human–nature relationship, shaped by recreation, tourism and aesthetic values. However, socioeconomic drivers biodiversity change in coastal have received less attention. Soft sediment seafloors support diverse species communities contribute to ecosystem functionality. One main threats is dredging, which sweeps resident organisms. Dredgings commonly done deepen waterways, but also for purposes private housing. The ecological impacts these small‐sized dredgings not well known over broad environmental geographical gradients. We developed a simple approach spatial integration system, describe how recreational land use contributes loss marine biodiversity. It shows human behaviour, such as preference location second home, can be derived from data coupled with change. characterize typical locations homes based on accessibility, aesthetics environment, information identified suitable new homes. quantified depth substrate sea floor, extent reed beds, influencing access properties. then simulate an annual increase expected land‐use change, namely dredging shores. Finally, we realized projected dredged sites, distribution models, relying extensive collected 170,000 underwater sites. found that detrimental biodiversity, targets shallow, photic bays lagoons, algal aquatic plant communities, limited recovery potential. had benthic faunal habitats, maintain processes functions. Our results reveal significant driven use. Reversing trend requires holistic understanding socioecological systems. highlight need integrating land–sea interactions into conservation policies reforming current regulation benefit Read free Plain Language Summary this article Journal blog.

Language: Английский

---

Governance pathway for coastal eutrophication based on regime shifts in diatom–dinoflagellate composition of the Bohai and Baltic Seas

Water Research, Journal Year: 2023, Volume and Issue: 250, P. 121042 - 121042

Published: Dec. 19, 2023

Language: Английский

---