Ecological Indicators, Год журнала: 2024, Номер 158, С. 111561 - 111561
Опубликована: Янв. 1, 2024
A more profound comprehension of various facets biodiversity is essential for advancing sustainable governance and its associated ecosystem services. In this study, we delved into the composition beta diversity within macroinvertebrates communities in Thousand Islands Lake catchment area. Subsequently, investigated factors influencing diverse alpha diversity, ultimately employed structural equation modeling to analyze pathways through which both regional environmental factors, like climate land use, local variables collectively impact distinct ecosystem. Our results showed that (i) taxonomic phylogenetic diversities were primarily determined by turnover, while functional predominantly nestedness; (ii) are influenced spatial variables, with environment ranking second, use explaining lowest proportion according variance partitioning; (iii) mainly affected especially climatic (precipitation) hydrological (depth) revealed modeling. These offer compelling evidence composition, ecological drivers, specific influence vary across different scales. Future studies could focus on as well consider effects at scales, would provide new insights potential patterns community associations.
Язык: Английский
Процитировано
13
Environmental Science & Technology, Год журнала: 2025, Номер unknown
Опубликована: Фев. 25, 2025
Aquatic biodiversity loss, particularly in rapidly developing nations, continues to raise concerns, prompting urgent debates on reconciling economic growth with environmental preservation through land use planning. While spatial variations aquatic communities along gradients are well-documented, precise ecological thresholds for impacts freshwater lakes remain elusive, hindering sustainable development efforts. This study investigated six representative China between 2019 and 2020, all significantly impacted by anthropogenic activities. We utilized macroinvertebrate as bioindicators employed four categories of metrics─taxonomic diversity, functional pollution tolerance, water quality─to assess their responses local patterns. Macroinvertebrate community composition varied among the studied lakes, pollution-tolerant taxa predominating highly urbanized eutrophic systems. Notably, benthic exhibited greater sensitivity urban (ecological thresholds: 2-10%) compared agricultural (thresholds: 15-40%). The most pronounced were observed within 1-5 km lakeshore, circular buffers yielding more significant effects than fan-shaped buffers, excluding areas. A novel intensity indicator─the ratio nonecological (NEL/EL = area land/area land)─proved effective predicting shifts. Smaller or heavily showed marked changes at NEL/EL ratios 0 0.6, while larger river-connected shifts exceeding 1.5. These findings underscore profound footprint human activities lake ecosystems cover emerging deleterious factor.
Язык: Английский
Процитировано
2
Environmental Research, Год журнала: 2025, Номер 270, С. 121054 - 121054
Опубликована: Фев. 6, 2025
Язык: Английский
Процитировано
1
The Science of The Total Environment, Год журнала: 2023, Номер 905, С. 167144 - 167144
Опубликована: Сен. 18, 2023
There remains a persistent concern that freshwater biodiversity is in decline and being threatened by pollution. As the UK, particularly England, densely populated nation with rivers of modest dilution capacity, this location very suitable to examine how has responded human pressures over past 30 years. A long-term dataset 223,325 macroinvertebrate records from 1989 2018 for England was retrieved examined. sub-set approximately 200 sites per English Region (1515 total 62,514 samples), longest most consistent were matched predicted wastewater exposure, upstream land cover terrain characteristics (latitude, altitude, slope gradient flow discharge). To understand changes diversity sensitivity respect these parameters, biotic indices (i) overall family richness, (ii) Ephemeroptera, Plecoptera, Trichoptera (EPT) (iii) Biological Monitoring Working Party (BMWP) scores NTAXA (number scoring taxa) (iv) ASPT (average score taxon) selected. review close BMWP come those expected at minimally impacted reference included. For all latitudes, altitudes, channel slope, river size, exposure levels, differing proportions woodland, seminatural, arable urban cover, or examined improved period, although improvement slowed some cases post 2003. Mean richness increased 15 25 groups, 66 % improvement. The mean EPT (3 10 families, >300 improvement), which are considered be sensitive pollution, implies benefited national critical components water quality.
Язык: Английский
Процитировано
21
Environment International, Год журнала: 2024, Номер 188, С. 108745 - 108745
Опубликована: Май 12, 2024
One of the fundamental objectives in ecology is to investigate ecological processes and associated factors governing abundance spatial distribution patterns biodiversity. However, reaction biological communities environmental degradation remains relatively unknown, even for ecologically crucial like macroinvertebrates aquatic ecosystems. Here, we sampled 117 locations quantify relative contributions geographical factors, including water quality, land use, climate, hydrological determine absolute compositions macroinvertebrate their Yellow River Basin (YRB), sixth-longest river system on Earth. We assessed roles species sorting dispersal determining community structure along YRB. Our results demonstrated that alpha beta diversity indices showed an increase from up- low-reaches The middle exhibited elevated both regions stable compositions. biodiversity was influenced by a combination variables, with predominantly serving as principal determinants. Results multiple linear regression variance decomposition effect approximately three times greater than factors. These findings provide support hypothesis sorting, driven gradients, plays significant role shaping running ecosystems at basin scales. Moreover, contributing substantial shifts across different segments YRB indicate distinct sections have been varying stressors, downstream areas being more susceptible impacts pollution urbanization resulting human activities.
Язык: Английский
Процитировано
8
Environmental Science and Pollution Research, Год журнала: 2024, Номер 31(6), С. 9565 - 9581
Опубликована: Янв. 9, 2024
Язык: Английский
Процитировано
5
Sustainability, Год журнала: 2024, Номер 16(5), С. 1752 - 1752
Опубликована: Фев. 21, 2024
Sediment precipitation in riverbeds influences the effectiveness of structural and non-structural measures for flash flood mitigation increases potential flooding. This study aimed to disclose implemented risk Kassala town, eastern Sudan. We employed remote sensing (RS) GIS techniques determine change Gash River riverbed, morphology, leveling both western sides river. Flood model simulation a 3D path profile were generated using digital elevation (DEM) with data resolution 12.5 m from ALOS BILSAR satellite. The main purpose this is extract layer riverbed on banks variations their relationship occurrence mitigation. construction dikes spurs near town has led sediment precipitation, causing rise. results show that it now 1.5 above level, steep slope 2 m/km, cross-section area at bridge shrunk, which indicates body will partially impede river’s high discharge increase area. part higher likelihood flooding than side. suggests redesigning like widening River, extending normal water flow, strengthening early warning systems, implementing soil conservation activities flow.
Язык: Английский
Процитировано
4
Water Research, Год журнала: 2025, Номер 276, С. 123257 - 123257
Опубликована: Фев. 9, 2025
Язык: Английский
Процитировано
0
Frontiers in Environmental Science, Год журнала: 2025, Номер 13
Опубликована: Март 4, 2025
Introduction In recent years, river ecosystem stability has been increasingly threatened by human activities and climate change. Comprehensive quantification of systematic analysis its response to change are essential for effective conservation management. Methods Thus, this study proposed a novel quantitative approach integrating the driving factors. The Han River Basin in China was selected as area due distinctive characteristics significant anthropogenic impact. Both external factors, including urbanization, dam construction, precipitation, internal such TP, DO, EC, were considered Results results revealed that compared upstream, resilience lower reaches decreased 35.75% resistance 8.2%, suggesting from upstream downstream. Urbanization had most negative impact on stability, followed precipitation construction. Among EC three main factors affecting increases these contributed positively enhancing stability. Discussion These findings highlight need targeted strategies mitigate human-induced disturbances enhance Based results, specific recommendations support watershed management ecological restoration, providing valuable insights sustainable conservation.
Язык: Английский
Процитировано
0
Frontiers in Ecology and Evolution, Год журнала: 2025, Номер 13
Опубликована: Март 27, 2025
Distance-decay relationships (DDRs) are a useful method for describing the spatial distribution of biological communities. However, patterns macroinvertebrate DDRs and mechanisms community assembly in continuous lotic-lentic (river-lake) systems remain poorly understood. We compared temporal biogeographic communities different water types (river vs. lake) temperate zone China. Data were collected from 152 sampling sites Daqing River Basin over two years, multivariate statistical analyses conducted. These results provide first description biogeographical Macroinvertebrates both river lake exhibited contrasting compositions, likely due to habitat differences. All showed significant distance-decay pattern waterbody types, with stronger lake. In lake, environmental variables contributed communities, while river, slightly more important than variables. Spatial influenced directly impacted indirectly. Importantly, these strongly driven by stochastic processes. Additionally, taxa formed ecologically taxonomically distinct groups, potentially structured deterministic The normalized stochasticity ratio (NST) quantified community-building process based on neutral model, indicating that processes may dominate rivers, lakes. findings highlight roles shaping lotic lentic systems, providing new insights into river-lake ecosystems.
Язык: Английский
Процитировано
0