Long-Term Recovery Dynamics Determined by the Degree of the Disturbance – Ten Years Tracking of Aquatic Macroinvertebrate Recolonization after an Industrial Disaster (Red Sludge Disaster, Hungary) DOI
Kata Karádi-Kovács, Ildikó Szivák, Tamás Bozóki

et al.

Published: Jan. 1, 2023

A ten-year-long examination of macroinvertebrate assemblage recovery was conducted following a catastrophic spill highly alkaline red sludge (pH >13) into lowland streams. Our primary objective to compare patterns after coarse and fine-grain disturbances, focusing on two aspects: i) trend analysis reveal mean changes community parameters, ii) variation analyses assess parameter over time. We statistical long-term data series macroinvertebrates obtained from quantitative samples collected at four sections with varying degrees disturbance along the impacted stream sections.We developed comprehensive theoretical framework comprising sequential phases: Ramp-up, Overshoot, Oscillation Phases.i) revealed that disturbances show gradual pattern, while variance showed an asymptotic convergence equilibrium.ii) Evaluating these trends across phases unveiled initial phase exhibited steep trajectory, lasting 4-9 months, irrespective severity. Coarse-grain induced remarkable Overshoot phenomenon all metrics. The more severe disturbance, greater height duration Overshoot. results suggest presence or absence can serve as indicator for coarse-grain in context large infrequent (LID). entire process lasts 2.5-3 years severity LID.In conclusion, minimum survey half is deemed imperative capture recovery, associated LID are not expected extend beyond three-year threshold. framework, including may assist future studies comparing different types. Furthermore, our likely be applicable other groups organisms given sufficiently long monitoring influenced also by length reproductive cycles.

Language: Английский

Habitat complexity promotes species richness and community stability: a case study in a marine biogenic habitat DOI Creative Commons
Victor L. Jardim, Aurélien Boyé, Vincent Le Garrec

et al.

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

Published: March 21, 2025

Habitat complexity (HC) promotes species richness and abundance. Aquatic environments are faced with intense pressures that threaten the 3D structure of seafloor, cascading effects on ecosystem functioning biodiversity. Maerl or rhodolith beds marine biogenic habitats created by few free‐living non‐geniculate coralline algae aggregate form complex structures. Although their high biodiversity has been attributed to HC provided algal nodules, mechanisms through which modification affect associated communities remains uncertain in face numerous confounding factors. Hence, we tested how changes extent nature maerl drive Using long‐term monitoring data from ten Brittany (France) over 12 years, investigated links between structural complexity, environmental conditions benthic macrofaunal communities. was quantified at nodule bed level, morphometrics density, its local diversity spatial temporal variability were evaluated. promoted density most taxa regardless other These relationships linear no limiting threshold found a regional scale. played more important role driving patterns than measured constraints individually, relatively lower distinct terms community composition structure. Species replacement main component stability. While overall facilitative, might be trait‐dependent, justifying comprehensive trait‐based approaches. Our results reiterate need protect habitats.

Language: Английский

Citations

0
Stream Invertebrate Responses to Fine Sediment Depend on the Organic and Inorganic Components DOI Creative Commons
Morwenna Mckenzie, Adrian L. Collins,

Noah G Davis

et al.

Freshwater Biology, Journal Year: 2025, Volume and Issue: 70(3)

Published: March 1, 2025

ABSTRACT Excess fine sediment ( < 2 mm) is a pervasive stressor of aquatic systems at global scale. To date, most research quantifying ecological response to deposited has been conducted without distinguishing between the organic and inorganic components sediment, leaving mechanistic understanding how affects macroinvertebrates lacking. address this gap, we examined responses various stress (inorganic, total mass). Using data collected from field surveys, first, quantified invertebrate in two countries: New Zealand United Kingdom second, whether differed spring autumn Kingdom. Results indicated that invertebrates varied dependent on both component facet community (i.e., taxonomic or functional). The was highly influential structuring communities, particularly Zealand, whilst Kingdom, there were less pronounced differences relative importance sediment. Ephemeroptera, Trichoptera Plecoptera taxa (and derived indices) consistently found be strongly related all gradients. Further, according threshold analysis, changes measures occurred lower quantities than spring, for component. However, individual taxon trait more evident spring. Our study highlights several implications monitoring management We have demonstrated distinctive inorganic, mass) which may missed qualitative assessments gross coverage streambeds alone. aggregating multiple seasons into annual overlook important nuances different exhibited seasons.

Language: Английский

Citations

0
Development of a benthic macroinvertebrate-based multimetric index to quantify riverbed substrate condition in Swedish streams DOI Creative Commons
Peter Carlson

Journal of Freshwater Ecology, Journal Year: 2025, Volume and Issue: 40(1)

Published: April 9, 2025

Language: Английский

Citations

0
Hydrological variability significantly influences aquatic biological integrity at the spatial scale in semi-arid watersheds DOI

Lina Li,

Rui Xia, Xinghui Xia

et al.

Journal of Hydrology, Journal Year: 2025, Volume and Issue: unknown, P. 133359 - 133359

Published: April 1, 2025

Language: Английский

Citations

0
Freshwater invertebrate responses to fine sediment stress: A multi‐continent perspective DOI Creative Commons
Morwenna Mckenzie, Andrew J. Brooks, Marcos Callisto

et al.

Global Change Biology, Journal Year: 2023, Volume and Issue: 30(1)

Published: Dec. 9, 2023

Abstract Excessive fine sediment (particles <2 mm) deposition in freshwater systems is a pervasive stressor worldwide. However, understanding of ecological response to excess river at the global scale limited. Here, we aim address whether there consistent increasing levels deposited by invertebrates across multiple geographic regions (Australia, Brazil, New Zealand and UK). Results indicate responses are not globally instead dependent on both region facet invertebrate diversity considered, that is, taxonomic or functional trait structure. Invertebrate communities Australia were most sensitive sediment, with greatest rate change occurring when cover was low (below 25% reach). Communities UK displayed greater tolerance compositional between 30% 60% cover. In which included heavily sedimented sampled streams, more tolerant demonstrated ambiguous responses, likely due historic environmental filtering communities. We conclude generalisable landscape filters regional context land management playing important roles.

Language: Английский

Citations

10
A Global hydrological index describes ecological conditions in rivers: A new approach to environmental flow calculation reflecting macroinvertebrate requirements DOI Creative Commons
Andrzej Wałęga, Renata Kędzior, Tomasz Skalski

et al.

Ecological Indicators, Journal Year: 2025, Volume and Issue: 170, P. 113082 - 113082

Published: Jan. 1, 2025

Language: Английский

Citations

0
GravelSens: a Smart Gravel Sensor for High-Resolution, Non-Destructive Monitoring of Clogging Dynamics DOI Creative Commons
Kaan Koca, Eckhard Schleicher, André Bieberle

et al.

Sensors, Journal Year: 2025, Volume and Issue: 25(2), P. 536 - 536

Published: Jan. 17, 2025

Engineers, geomorphologists, and ecologists acknowledge the need for temporally spatially resolved measurements of sediment clogging (also known as colmation) in permeable gravel-bed rivers due to its adverse impacts on water habitat quality. In this paper, we present a novel method non-destructive, real-time pore-scale deposition monitoring by using wire-mesh sensors (WMSs) embedded spheres, forming smart gravel bed (GravelSens). The measuring principle is based one-by-one voltage excitation transmitter electrodes, followed simultaneous resulting current receiver electrodes at each crossing pores. currents are then linked conductive component fluid impedance. measurement performance developed sensor validated applying Maxwell Garnett parallel models data comparing results obtained gamma ray computed tomography (CT). GravelSens tested under varying filling conditions different particle sizes ranging from sand fine gravel. close agreement between CT indicates technology’s applicability sediment–water research while also suggesting potential other solid–liquid two-phase flows. This visualization system offers capability monitor de-clogging dynamics within pore spaces up 10,000 Hz, making it first laboratory equipment capable performing such situ without radiation. Thus, major improvement over existing methods holds promise advancing understanding flow–sediment–ecology interactions.

Language: Английский

Citations

0
Stressor-driven changes in freshwater biological indicators inform spatial management strategies using expert knowledge, observational data, and hierarchical models DOI
Sean C. Emmons, Matthew J. Cashman, Rosemary M. Fanelli

et al.

Ecological Indicators, Journal Year: 2025, Volume and Issue: 174, P. 113501 - 113501

Published: April 17, 2025

Language: Английский

Citations

0
Fish conservation in streams of the agrarian Mississippi Alluvial Valley: conceptual model, management actions, and field verification DOI Creative Commons
K. Jack Killgore,

Jan Jeffrey Hoover,

L. E. Miranda

et al.

Frontiers in Freshwater Science, Journal Year: 2024, Volume and Issue: 2

Published: Feb. 16, 2024

The effects of agriculture and flood control practices accrued over more than a century have impaired aquatic habitats their fish communities in the Mississippi Alluvial Valley, historic floodplain Lower River prior to leveeing. As first step conservation planning adaptive management, we developed tested conceptual model how changes this affected stream environments assemblages. is deliberately simple structure because it needs be understood by stakeholders ranging from engineers farmers who must remain engaged ensure effective conservation. Testing involved multivariate correlative analyses that included descriptors land setting, water quality, assemblages representing 376 samples taken two decades Strahler order 1 8. was adequately corroborated empirical data, but with unexplained variability not uncommon field surveys where gear biases, temporal scale biases prevent accurate characterizations. Our distinguishes three types actions relevant large agricultural floodplains: reforestation parcels riparian zone conservation, in-channel interventions connectivity preservation, flow augmentation. Complete restoration may an acceptable option community. However, most cases application even basic measures can support return sensitive species. We suggest together these bring improved properties impacted reaches, higher reach biodiversity, intolerant species, rheophilic fishes.

Language: Английский

Citations

2
Seasonal variability of lotic macroinvertebrate communities at the habitat scale demonstrates the value of discriminating fine sediment fractions in ecological assessments DOI Creative Commons
Kate L. Mathers, Patrick D. Armitage, Matthew J. Hill

et al.

Ecology and Evolution, Journal Year: 2023, Volume and Issue: 13(10)

Published: Sept. 29, 2023

Despite lotic systems demonstrating high levels of seasonal and spatial variability, most research biomonitoring practices do not consider seasonality when interpreting results are typically focused at the meso-scale (combined pool/riffle samples) rather than considering habitat patch dynamics. We therefore sought to determine if sampling season (spring, summer autumn) influenced observed macroinvertebrate biodiversity, structure function unit scale (determined by substrate composition), this in turn assessment fine sediment (sand silt) pressures. found that biodiversity supported level was seasonally consistent with contribution nestedness turnover structuring communities varying seasonally. Habitat differences community composition were evident for taxonomic regardless but functional communities, and, notably, explained a greater amount variance unit. Macroinvertebrate silt habitats demonstrated strong functionally comparable sand spring gravel autumn. Sand impoverished compared other season. Silt increase Ephemeroptera, Plecoptera Trichoptera (EPT) taxa richness from into autumn, while vegetation displayed peak EPT abundance summer. Only temporal variability evenness suggesting these different terms their resource partitioning productivity over time habitats. Gravel appeared be more stable remaining consistent. To accurately evaluate influence on ecosystems, it is imperative routine scientific discriminate between fractions, given they support particularly during autumn months.

Language: Английский

Citations

5