Spatial accumulation of flood-driven riverside litter in two Northern Atlantic Rivers

Environmental Pollution, Год журнала: 2024, Номер 345, С. 123528 - 123528

Опубликована: Фев. 7, 2024

The escalation of litter accumulation in aquatic environments is recognized as an emerging global concern. Although rivers represent the main conduits for land-based waste into oceans, spatial dynamics these systems remain poorly investigated, especially after hydro-climatic extreme events. Floods have been identified major drivers mobilization, including macroplastics, within rivers. However, predicting flood-induced along riverbanks complex due to cumulative interplay multiple environmental (geomorphological and riparian) anthropogenic factors. Using empirical data collected from 14 stream reaches two Northern Atlantic Portugal, our study evaluates which factors, among geomorphological, riparian, descriptors, best drive riverside floods. Taking account longitudinal gradient heterogeneity studied reaches, enhances how characteristics (type, size) vary across a rural-urban continuum. Our model reveals that combination human population density slope at river reach showed highest explanatory power litter. findings indicate tends be retained close source, even under flood conditions. We also found structure riparian vegetation low accumulation. trapping could influenced by input (density type) varies with activities. This work highlights importance gathering field identify critical areas basins. can further support managers designing implementing effective cleanup campaigns plastic recovery strategies specific areas. Nevertheless, it crucial enhance coordinated efforts entire value chain reduce pollution, promote innovative approaches valorization, establish prevention pathways.

Язык: 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, Год журнала: 2024, Номер 929, С. 172659 - 172659

Опубликована: Апрель 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

Язык: Английский

---

Exploring macroinvertebrate traits along anthropogenic disturbed gradient in West African Savanna River systems: A case study of Niger state, North central region of Nigeria

Biologia, Год журнала: 2025, Номер unknown

Опубликована: Фев. 3, 2025

Язык: Английский

---

Long-term trends in stream benthic macroinvertebrate communities are driven by chemicals

Environmental Sciences Europe, Год журнала: 2023, Номер 35(1)

Опубликована: Дек. 6, 2023

Abstract Background Recent studies indicate a partial recovery of European stream macroinvertebrate diversity. However, the key determinants shaping overall community trends are only partly explored, owing to insufficient long-term environmental data collected in parallel with responses. We investigate communities (i.e., taxonomic and trait composition metrics), explore their relationships diverse drivers land-use, runoff, water temperature, in-stream chemicals). use annually spring summer between 2007 2021 at four sampling sites within Rhine-Main-Observatory Long-Term Ecological Research site. These encompass gradient from less-disturbed disturbed conditions. Results Over time, shifts metrics indicated an improvement Long-term biological mirrored those for metrics; example, increases over time richness were paralleled by functional dispersion. Meanwhile, ecological particularly driven changes drivers. Land-use, runoff explained around 20% variance communities. Water temperature land-use played relatively equal roles metric responses spring, while emerged as most influential driver summer. when incorporating chemical more direct measurement increased c.a. 50% both seasons. Conclusions Examining relevant variables beyond climate improves insights into why biodiversity exhibits trends. call increase initiatives link monitoring

Язык: Английский

---

Multiple stressors alter greenhouse gas concentrations in streams through local and distal processes

Global Change Biology, Год журнала: 2024, Номер 30(5)

Опубликована: Апрель 30, 2024

Abstract Streams are significant contributors of greenhouse gases (GHG) to the atmosphere, and increasing number stressors degrading freshwaters may exacerbate this process, posing a threat climatic stability. However, it is unclear whether influence multiple on GHG concentrations in streams results from increases in‐situ metabolism (i.e., local processes) or changes upstream terrestrial production distal processes). Here, we hypothesize that mechanisms controlling stressor effects vary between carbon dioxide (CO 2 ) methane (CH 4 ), with latter being more influenced by stream metabolism, former mainly responding processes. To test hypothesis, measured CO ( p CH 50 sites encompass gradients nutrient enrichment, oxygen depletion, thermal stress, riparian degradation discharge. Our indicate these had additive concentrations, interactions explaining limited variance. Nutrient enrichment was associated higher heterotrophy , whereas increased depletion water temperature. Discharge positively linked primary production, respiration but correlated negatively . models ‐equivalent can than double experience high compared those oligotrophic oxic conditions. Structural equation revealed discharge were related processes rather metabolism. In contrast, responses temperature both Collectively, our study illustrates potential feedbacks resulting freshwater provides insight into mediating impacts streams.

Язык: Английский

---

Wastewater and warming effects on aquatic invertebrates: experimental insights into multi-level biodiversity consequences

Water Research, Год журнала: 2024, Номер 267, С. 122496 - 122496

Опубликована: Сен. 23, 2024

Язык: Английский

---

Large-scale factors controlling biological communities in the Iberian Peninsula: an insight into global change effects on river ecosystems

Aquatic Sciences, Год журнала: 2023, Номер 85(4)

Опубликована: Авг. 18, 2023

Abstract The ongoing global environmental change poses a serious threat to rivers. Comprehensive knowledge of how stressors affect biota is critical for supporting effective management and conservation strategies. We evaluated the major gradients influencing spatial variability freshwater biodiversity in continental Spain using landscape-scale variables representing climate, land use cover (LULC), flow regime, geology, topography, diatom ( n = 117), macroinvertebrate 441), fish 264) communities surveyed minimally impacted streams. Redundancy analysis identified factors significantly contributing community variability, specific multivariate analyses (RLQ method) were used assess trait–environment associations. Environmental defined (e.g., mountain–lowland). Siliceous, steep streams with increased precipitation levels favored stalked diatoms, macroinvertebrates aquatic passive dissemination, migrating fish. These traits replaced by adnate small macroinvertebrates, non-migratory lowland warmer climates, calcareous agriculture, stable regimes. Overall, better explained than suggesting that these latter might be more related local-scale characteristics microhabitat structure, substrate, water physicochemistry). upslope gradient river networks slope, temperature, LULC changes) was paralleled observed taxonomy-based trait-based variability. This result indicates effects on riverine could emerge as longitudinal distribution changes within networks. Implementing actions focusing simultaneously hydrological regime addressing changes), continuity best strategy mitigating biodiversity.

Язык: Английский

---

Impacts of mining on the diversity of benthic macroinvertebrates - A case study of molybdenum mining area in Luanchuan county

Environmental Pollution, Год журнала: 2024, Номер unknown, С. 125335 - 125335

Опубликована: Ноя. 1, 2024

Язык: Английский

---

Disentangling the effects of multiple stressors on freshwater macroinvertebrates: A quantitative analysis of experimental studies

Ecological Indicators, Год журнала: 2024, Номер 169, С. 112880 - 112880

Опубликована: Ноя. 22, 2024

Язык: Английский

---

Year-to-year variations have a more impact on leaf litter breakdown than the presence or absence of riparian vegetation in highland grasslands streams

Research Square (Research Square), Год журнала: 2023, Номер unknown

Опубликована: Июль 18, 2023

Abstract Context Highland grasslands are poorly studied landscapes, understanding how the ecological process of leaf litter breakdown works in these ecosystems is crucial for their management and conservation. Objectives The study aims to examine importance spatial temporal heterogeneity on macroinvertebrate composition highland grassland streams. Methods We conducted a three-year experiment two different systems: one with riparian vegetation without vegetation. took place during same season each year, we assessed both biotic abiotic parameters year. Results Leaf streams showed no significant differences remaining mass between systems interaction years. However, were observed Macroinvertebrate richness, density, shredder density did not vary significantly among years systems, but there was factors total scraper density. Conclusions This emphasizes dynamics decomposition invertebrate community streams, year-to-year variations having greater influence than presence vegetation, highlighting need understand mechanisms effective

Язык: Английский

---