The Fungal Side of the Story: Saprotrophic- vs. Symbiotrophic-Predicted Ecological Roles of Fungal Communities in Two Meromictic Hypersaline Lakes from Romania DOI Creative Commons

Cristina Mircea,

Ioana Rusu,

Erika Andrea Levei

et al.

Microbial Ecology, Journal Year: 2024, Volume and Issue: 87(1)

Published: Oct. 17, 2024

Over three-quarters of Earth's surface exhibits extreme environments where life thrives under harsh physicochemical conditions. While prokaryotes have often been investigated in these environments, only recent studies revealed the remarkable adaptability eukaryotes, particular fungi. This study explored mycobiota two meromictic hypersaline lakes, Ursu and Fără Fund, Transylvania (Romania). The intrinsic extrinsic fungal diversity was assessed using amplicon sequencing environmental DNA samples from sediments, water columns, surrounding soils, an associated rivulet. communities, illustrated by 18S rRNA gene ITS2 region, exhibited contrasting patterns between lakes. region better than diversity. data showed that Ascomycota most abundant group identified both followed Aphelidiomycota, Chytridiomycota, Basidiomycota. Despite similar α-diversity levels, significant differences community structure were observed correlated with salinity, total organic carbon, nitrogen, ammonium. Taxonomic profiling depth-specific variations, Saccharomycetes prevalent Lake's deeper layers Lecanoromycetes Fund Lake. functional annotation FungalTraits diverse ecological roles within communities. Lichenized fungi dominant Lake, while saprotrophs Additionally, wood soil saprotrophs, along plant pathogens, more rivulet, layers. A global overview trophic relations each studied niche impossible to establish due unconnected graphs corresponding interactions analyzed Plotting unweighted connected subgraphs at genus level suggests salinity made niches for taxa. shed light on understudied diversity, distribution, functions environments.

Language: Английский

Unfolding the dynamics of ecosystems undergoing alternating wet‐dry transitional states DOI Creative Commons
Rebeca Arias‐Real, Manuel Delgado‐Baquerizo, Sergi Sabater

et al.

Ecology Letters, Journal Year: 2024, Volume and Issue: 27(8)

Published: Aug. 1, 2024

Abstract A significant fraction of Earth's ecosystems undergoes periodic wet‐dry alternating transitional states. These globally distributed water‐driven ecosystems, such as intermittent rivers and coastal shorelines, have traditionally been studied two distinct entities, whereas they constitute a single, interconnected meta‐ecosystem. This has resulted in poor conceptual empirical understanding ecosystems. Here, we develop framework that places the temporal availability water core driver biodiversity functional patterns at global scale. Biological covers (e.g., aquatic biofilms biocrusts) serve an excellent model system thriving both terrestrial states, where their succession underscores intricate interplay between these The duration, frequency, rate change cycles impose plausible scenarios different types biological can occur depending on desiccation/hydration resistance traits. implies eco‐evolutionary potential covers, represented by trait profiles, would support functions while maintaining similar multifunctionality levels. By embracing multiple states our approach help to better understand manage impacts providing new avenues for interdisciplinary studies.

Language: Английский

Citations

5
A meta-analysis of drought effects on litter decomposition in streams DOI Creative Commons
Verónica Ferreira, Manuel A. S. Graça, Arturo Elosegi

et al.

Hydrobiologia, Journal Year: 2023, Volume and Issue: 850(8), P. 1715 - 1735

Published: March 13, 2023

Abstract Droughts, or severe reductions of water flow, are expected to become more frequent and intense in rivers many regions under the ongoing climate change scenario. It is therefore important understand stream ecosystem functioning drought conditions. We performed a meta-analysis studies addressing effects on litter decomposition streams (50 contributing 261 effect sizes) quantify overall this key process identify main moderators controlling these effects. Drought reduced by 43% overall, which can impact energy matter fluxes along heterotrophic food webs. The magnitude depended type (natural > human-induced drought), decomposer community (microbes + macroinvertebrates microbes) natural drought, (warm humid temperate Mediterranean) identity. also increased with severity drought. will likely be strongest abundant shredders undergoing especially if temporary. composition riparian vegetation may modulate decomposition, have management applications.

Language: Английский

Citations

12
Key bacterial groups maintain stream multifunctionality in response to episodic drying DOI Creative Commons
Giulia Gionchetta, Rebeca Arias‐Real, Pilar Hurtado

et al.

Limnology and Oceanography Letters, Journal Year: 2024, Volume and Issue: 9(3), P. 286 - 295

Published: April 30, 2024

Abstract Microbial biodiversity is fundamental to maintain ecosystem functioning in seasonally variable ecosystems. However, it remains unclear how alterations water availability caused by episodic drying compromise the ability of stream microbes multiple functions simultaneously (e.g., primary production and carbon cycling). Using data from 32 streams, we investigated phenology annual influences sediment microbial their capacity sustain multifunctionality. Our results showed that multifunctionality most bacteria did not respond changes phenology. Only two bacterial groups, drying‐resistant Sphingobacteriia drying‐sensitive Acidobacteria_Gp7, exhibited positive associations with multifunctionality; whereas, diversity a negative correlation functions. Among these aspects, strongest at low moderate performance levels. findings will help better understand mechanisms through which sustains streams responses global change.

Language: Английский

Citations

4
Type-2 Backstepping T-S Fuzzy Bionic Control Based on Niche Symmetry Function DOI Creative Commons
Yunli Hao,

Maohua Wang,

Jian Tang

et al.

Symmetry, Journal Year: 2025, Volume and Issue: 17(1), P. 121 - 121

Published: Jan. 14, 2025

Niche can reflect the changes in quality of ecological environment and balance state. The more advanced ecosystem, complex higher-order nonlinearities uncertainties that are presented. For such an uncertain parameter system with nonlinearity, backstepping fuzzy control is a good method. When method introduced into Type-2 T-S principle, equality index symmetry function composed factors used as consequence, Lyapunov constructed to analyze stability find out adaptive law consequence. This reflects individual organisms always develop their own favorable direction, highlighting bionic intelligent Through simulation analysis, Backstepping effective tracking, which self-development ability self-coordination organisms, physical background this

Language: Английский

Citations

0
Impacts on fish and microbial communities occurring in the Amazon River Basin DOI
Dayane Juliate Barros, Acácio Aparecido Navarrete, Luiz Sérgio Vanzela

et al.

Elsevier eBooks, Journal Year: 2025, Volume and Issue: unknown, P. 3 - 18

Published: Jan. 1, 2025

Language: Английский

Citations

0
Hydrological regimes and Niche Partitioning Drive Fungal Community Structure and Function in Arid Wetlands Sediments of South Africa DOI
Henry Joseph Oduor Ogola, Grace N. Ijoma, Joshua N. Edokpayi

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Abstract Arid wetlands are ecologically significant yet understudied ecosystems shaped by extreme conditions and hydrological variability. However, the structure ecological functional of fungal communities in these habitats remain poorly understood, especially southern Africa. This study integrated shotgun metagenomics, FUNGuild profiling, multivariate analyses to examine diversity, composition, environmental drivers seasonal permanent arid South Distinct assemblages emerged, primarily regimes ionic stress. Seasonal were dominated Mucoromycota (79%), particularly arbuscular mycorrhizal (AM) fungus (Rhizophagus, 62%), while had higher Ascomycota (54%), with Aspergillus (50%) prevalent oxygen-limited sediments. Although alpha diversity showed no difference, beta confirmed mycobiome differentiation. Total dissolved solids (TDS), electrical conductivity (EC), salinity key predictors TDS strongest determinant (P < 0.01). Functional guild analysis highlighted niche differentiation, saprotrophs dominating (59.7% vs. 21.5%; P 0.05), symbiotrophs, AM fungi, enriched (69.3% 36.1%; 0.001). Indicator taxa identified via LefSe (LDA > 3, 0.05) random forest modeling included Rhizophagus, Trichoderma, Fusarium, Entomophthora wetlands, wetlands. provides first integrative insight into ecology Africa’s demonstrating that regime shapes function through filtering specialization, implications for guiding conservation adaptive management fragile ecosystems.

Language: Английский

Citations

0
Fungal identity mediates the impacts of multiple stressors on freshwater ecosystems DOI Creative Commons
Diana Graça, Rebeca Arias‐Real, Isabel Fernandes

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 937, P. 173466 - 173466

Published: May 22, 2024

Predicting how multiple anthropogenic stressors affect natural ecosystems is a major challenge in ecology. Freshwater are threatened worldwide by co-occurring stressors, which can aquatic biodiversity, ecosystem functioning and human wellbeing. In stream ecosystems, fungi play crucial role global biogeochemical cycles food web dynamics, therefore, assessing the functional consequences of fungal biodiversity loss under crucial. Here, microcosm approach was used to investigate effects (increased temperature nutrients, drying, loss) on three processes: organic matter decomposition, reproduction, biomass accrual. Net were antagonistic for but additive reproduction mainly positive all processes, even stress, demonstrating that diversity assures maintenance processes. Fungal species displayed distinct contributions each process. Furthermore, with negligible control conditions changed their either enhancing or impairing communities' performance, emphasizing importance identity. Our study highlights have different sensitivities environmental variability influence overall performance community. Therefore, preserving high maintain key functions within communities face change.

Language: Английский

Citations

3
Functional Redundancy Enables a Simplified Consortium to Match the Lignocellulose Degradation Capacity of the Original Consortium DOI
Yan Pang, Jingjing Wang, Songchen Dai

et al.

Environmental Research, Journal Year: 2024, Volume and Issue: unknown, P. 120373 - 120373

Published: Nov. 1, 2024

Language: Английский

Citations

2
Effect of inappropriate solid waste on microplastic contamination in Balasore district and its aquatic environment DOI Creative Commons

Arun Kumar Mohanta,

Chittaranjan Sahoo, Rajkumar Jena

et al.

Bulletin of the National Research Centre/Bulletin of the National Research Center, Journal Year: 2024, Volume and Issue: 48(1)

Published: Nov. 24, 2024

Abstract Background Microplastic infection is now one of the world’s key environmental concerns. The most significant causes microplastic contamination in aquatic ecosystems are coastal villages, landfill sites, shipping activities and dumping areas. ingestion has been described an inclusive assortment from different trophic levels. This paper provides scientific evidence solid waste various sites Balasore district. Results village environment composite sand soils comprises numerous contaminants that have substantial effects on detection characterization results. Significant differences results ultraviolet–visible (UV–Vis) spectroscopy determine many pollutants possibly affected by aspects, including sampling instrumental settings. Inductively coupled plasma optical emission (ICP-OES) applied for first time to content wastes. In comparison with other techniques like Fourier transform infrared (FTIR) spectroscopy, it allows smaller microparticles. Microplastics wastes occur at variable size nm µm inductively suitable screening. addition, gas chromatography mass spectrometry (GCMS) becoming a valuable component analytical platforms monitoring plastic content. Scanning electron microscopy (SEM) imaging also detects shapes microplastics Conclusions Our study offers fresh perspectives critical areas further research as well how rural populations worldwide should be involved future studies pollution. presence led increased scrutiny calls regulation. Governments organizations exploring policies reduce mitigate its impacts human health.

Language: Английский

Citations

2
Drying Shapes Aquatic Fungal Community Assembly by Reducing Functional Diversity DOI Creative Commons
Rebeca Arias‐Real, Pilar Hurtado, Giulia Gionchetta

et al.

Diversity, Journal Year: 2023, Volume and Issue: 15(2), P. 289 - 289

Published: Feb. 16, 2023

Aquatic fungi are highly diverse organisms that play a critical role in global biogeochemical cycles. Yet it remains unclear which assembly processes determine their co-occurrence and patterns over gradients of drying intensity, is common stressor fluvial networks. Although aquatic possess drying-specific adaptations, little known about how functional similarity influences probability traits sorted by drying. Using field data from 15 streams, we investigated responded to intensity. To do so, determined fungal patterns, best explain species likelihood, community mechanisms explaining changes diversity the gradient. Our results identified 24 pairs with positive probabilities 16 negative associations. The was correlated differences conidia shape endophytic capacity. Functional reduction gradient generally associated non-random abiotic filtering. However, changed gradient, random prevailing at low intensity filtering gaining more importance as intensifies. Collectively, our can help anticipate impacts change on communities ecosystem functioning.

Language: Английский

Citations

4