Predicting the Influence of Ammonium Toxicity Levels in Water Using Fuzzy Logic and ANN Models

Sustainability, Journal Year: 2024, Volume and Issue: 16(14), P. 5835 - 5835

Published: July 9, 2024

The study aimed to address the complex and critical issue of surface water quality monitoring by proposing a diversified approach that incorporates range chemical indicators. (1) Background: purpose was problem in relation toxic effects ammonium on aquatic ecosystems developing predictive models using fuzzy logic artificial neural networks. (2) Water samples from Styr River, influenced Rivne Nuclear Power Plant, were analyzed certified standard methods measured parameters, while network models, including Mamdani’s algorithm various configurations activation functions optimization algorithms, employed assess predict toxicity. (3) A system developed classify based ammonia content other six Artificial Neural Network (ANN) tested, with ANN#2 model (using ReLU ADAM optimizer) showing best performance. (4) This emphasizes need for precise modeling total water, considering its variable toxicity interactions environmental factors, effectively protect ecosystems, namely ichthyofauna.

Language: Английский

---

How tolerances, competition and dispersal shape benthic invertebrate colonisation in restored urban streams

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 929, P. 172665 - 172665

Published: April 21, 2024

Biotic communities often respond poorly to river restoration activities and the drivers of community recovery after are not fully understood. According Asymmetric Response Concept (ARC), dispersal capacity, species tolerances stressors, biotic interactions three key influencing restored streams. However, ARC remains be tested. Here we used a dataset on benthic invertebrate eleven stream sections in former open sewer system that were sampled yearly over period years. We applied four indices reflect tolerance against chloride organic pollution, community's capacity strength competition taxa lists each year site. Subsequently, generalised linear mixed models analyse change these time since restoration. Dispersal was high directly but continuously decreased time. The initial thus consisted good dispersers later joined by more slowly dispersing taxa. pollution also time, reflecting continuous improvement water quality an associated increase sensitive species. On contrary, did change, which could indicate stable level throughout sampling period. Lastly, within communities, reflected interspecific trait niche overlap, increased with show follows specific pattern is comparable between sites. Benthic from tolerant, fast generalists sensitive, specialists exposed stronger competition. Our results lay support (increasing role competition, decreasing dispersal) underline certain may still shape decade Disentangling macroinvertebrate colonisation can help managers better understand trajectories define realistic targets.

Language: Английский

---

Water quality deterioration remains a major stressor for macroinvertebrate, diatom and fish communities in German rivers

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 907, P. 167994 - 167994

Published: Oct. 22, 2023

About 60 % of Europe's rivers fail to meet ecological quality standards derived from biological criteria. The causes are manifold, but recent reports suggest a dominant role hydro-morphological and water quality-related stressors. Yet, in particular micropollutants hydrological stressors often tend be underrepresented multiple-stressor studies. Using monitoring data four Federal States Germany, this study investigated the effects 19 stressor variables six groups (nutrients, salt ions, dissolved oxygen/water temperature, mixture toxicity 51 micropollutants, alteration morphological habitat quality) on three assemblages (fishes, macroinvertebrates, benthic diatoms). Biological were analyzed for 35 community metrics quantified using Random Forest (RF) analyses put into hierarchical context. To compare metric responses, grouped categories reflecting important characteristics communities, such as sensitivity, functional traits, diversity composition well composite indices that integrate several one single index (e.g., class). Water - not turned out dominate responses all assemblages. In contrast, less pronounced stronger than Explained variances RF models ranged 23-64 16-40 diatoms 18-48 fishes. Despite high variability across groups, sensitivity tended reveal individual higher explained variance indices. results (physico-chemical) deterioration continues impact many German rivers, despite extensive progress wastewater treatment during past decades. detect deterioration, schemes need target relevant physico-chemical micropollutants. Furthermore, needs measures flow magnitude dynamics). At present, surveys rarely address degree alteration. order achieve good status, river restoration management both Restricting just organism group macroinvertebrates) or only selected class) may hamper identification its classification and, thus mislead management.

Language: Английский

---

Morphodynamics and heavy metal accumulation in an artificially built near-natural river (Inde, Germany)

Journal of Sedimentary Environments, Journal Year: 2024, Volume and Issue: 9(1), P. 117 - 133

Published: Feb. 5, 2024

Abstract Heavy metals in riverine sediments threaten fluvial ecosystems worldwide. Sediment cascades transporting the compounds downstream lead to pollution stress from original input source. In regulated rivers, artificially built reaches with re-activated morphodynamics and morphological structures may become typical sink areas for contaminants. Therefore, a thorough understanding of transport mechanisms accumulation dynamics is key managing enhanced heavy metal concentrations alluvial sediments. this study, we investigate morphologically diverse 12 km-long river reach Inde River Germany, that was relocated 2005 due an open-pit lignite mine. As catchment former industrial hotspot (beginning Iron Age; golden age at end nineteenth century), floodplain accumulated since construction Neue are enriched metals. The relocation recycled repeatedly, causing mixing contaminated uncontaminated important sediment trap, especially river’s intense regulation immediately upstream. Thereby, into receiving waters, Rur River, limited. So far, it unclear whether there threshold storage that, if exceeded, turns morphodynamical development mainly depends on restoration design terms initially width corridor.

Language: Английский

---

Stream macroinvertebrate communities in restored and impacted catchments respond differently to climate, land-use, and runoff over a decade

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 929, P. 172659 - 172659

Published: April 22, 2024

Identifying which environmental drivers underlie degradation and improvements of ecological communities is a fundamental goal ecology. Achieving this challenge due to diverse trends in both conditions across regions, it constrained by the lack long-term parallel monitoring community data needed study causal relationships. Here, we identify key using high-resolution - dataset, an ensemble Soil Water Assessment Tool (SWAT+) model, models investigate effects climate, land-use, runoff on decadal trend (2012-2021) stream macroinvertebrate restored urban catchment impacted with mixed land-uses Germany. The showed decreased precipitation, increased temperature, reduced anthropogenic land-uses, led opposing catchment. two catchments also varied taxonomic trait composition metrics. most significant over time were recorded sites, have become wastewater free since 2007 2009. Within metric primarily explained land-use evaporation trends, while mostly associated precipitation trends. Meanwhile, did not undergo changes between 2012 2021, likely influenced prolonged droughts following floods after 2018. results our confirm significance restoration management fostering communities, climate change remains prodigious threat. coupling biodiversity concurrent sampling relevant critical for preventative restorative

Language: Английский

---

Assessing the impact of two conventional wastewater treatment plants on small streams with effect-based methods

PeerJ, Journal Year: 2024, Volume and Issue: 12, P. e17326 - e17326

Published: April 30, 2024

Sixty percent of discrete surface water bodies in Europe do not meet the requirements for good ecological and chemical status Germany, situation is even worse with over 90% failing to threshold. In addition hydromorphological degradation, intensive land use invasive species, pollution primarily considered be responsible inadequate bodies. As a quantitatively important source micropollutants, wastewater treatment plants (WWTPs) represent an entry path stressors. It therefore analyze effectiveness WWTPs eliminating micropollutants other stressors mitigate negative impacts treated (WW) aquatic ecosystems. Accordingly, this study, we evaluated two conventional, medium-sized on their small receiving systems southwestern region Hessen Germany during sampling campaigns (spring fall) using effect-based methods (EBM). We hypothesized that due insufficient elimination broad spectrum toxic effects would detected conventionally WW also waters downstream WWTPs. EBMs battery

Language: Английский

---

Sediment quality evaluation in a strategic port zone: application of Artemia franciscana and Emerita analoga in Callao Bay, Peru

Regional Studies in Marine Science, Journal Year: 2025, Volume and Issue: unknown, P. 104039 - 104039

Published: Jan. 1, 2025

---

Drivers of recovery and degradation of riverine benthic invertebrate communities: a Germany-wide analysis

Ecological Processes, Journal Year: 2025, Volume and Issue: 14(1)

Published: March 14, 2025

Abstract Background The global freshwater biodiversity crisis has led to widespread implementation of measures counteract environmental degradation and loss. While these efforts aim foster recovery, intensifying stressors continue drive complex biotic responses, the trajectories drivers which are insufficiently understood. This study examines roles abiotic stressors, interactions (e.g., competition), land use in shaping ecological status changes across Germany, using data from 1599 river sites sampled at least twice between 2004 2022. Results Changes emerged as most consistent status, explaining substantial variation ( R 2 = 0.39) similar slopes for recovery β − 0.11) 0.10). Biotic interactions, particularly interspecific competition, also influenced 0.11), with stronger positive effects observed during 2.99) compared 1.59). Land varied by context: Streams catchments higher cropland or urban areas showed greater likelihood whereas streams forested were more prone degradation. These results highlight interplay factors driving processes Conclusion findings emphasize critical role improving water quality enhancing rivers, while demonstrating importance context dynamics. Integrating insights into management restoration can enhance ecosystem resilience face escalating pressures.

Language: Английский

---

Proposal for a method to assess the habitat mosaic heterogeneity of a river bottom using fine-scale spatial analysis

Hydrobiologia, Journal Year: 2025, Volume and Issue: unknown

Published: April 23, 2025

Language: Английский

---

Wastewater treatment plant effluents as an obstacle to the full recovery of restored river sections

Environmental Pollution, Journal Year: 2025, Volume and Issue: unknown, P. 126483 - 126483

Published: May 1, 2025

Language: Английский

---