Local and species contribution of beta diversity of macrophytes in perspective of conservation and restoration of Ganga River, India

Hydrobiologia, Journal Year: 2024, Volume and Issue: 851(8), P. 2053 - 2070

Published: Jan. 6, 2024

Language: Английский

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Response of Montane Fish Biodiversity to Landscape and Anthropogenic Activity Under Potential Water Quality Pathways

Ecology and Evolution, Journal Year: 2025, Volume and Issue: 15(4)

Published: April 1, 2025

ABSTRACT Mountain river ecosystems, globally recognized biodiversity hotspots shaped by pronounced landscape heterogeneity, are facing intensifying anthropogenic pressures. However, interactions between and activity on montane fish remain poorly quantified. Taking the Yuan River (Yunnan, China) as a model system, environmental DNA (eDNA) partial least squares structural equation modeling (PLS‐SEM) were coupled to disentangle responses of facets (taxonomic, functional genetic diversity) elevation human footprint gradients. First, eDNA‐derived taxonomic composition ( R = 0.97 against catch data) demonstrated Cypriniformes Perciformes dominance. Second, downstream areas exhibited enhanced 0.32) diversity 0.49), contrasting with upstream maxima −0.47). Third, gradients exerted stronger direct effects than or metrics, independent spatial autocorrelation. Crucially, PLS‐SEM identified water quality (i.e., total phosphorus (TP), nitrogen (TN), biochemical oxygen demand (BOD 5 ), organic carbon (TOC)) pivotal mediator linking outcomes. Overall, present study establishes mechanistic framework for disentangling drivers change, offering scalable reference conservation prioritization in freshwater ecosystems.

Language: Английский

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Indigenous people doing citizen science to assess water quality using the BMWP in rivers of an arid semi-arid biosphere reserve in Mexico

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: July 2, 2024

Abstract Arid and semi-arid areas are among the most threatened ecosystems on planet. The Tehuacán-Cuicatlán Biosphere Reserve (TCBR), in southeastern Mexico, is an arid area with high biological diversity human settlements of eight ethnic groups. Two rivers drain reserve, Río Grande (RG) Salado (RS), which not subject to water quality monitoring by government agencies; however, measures these needed focus conservation actions this resource. This work aimed test effectiveness participatory participation three actors: management leaders, local communities, academics, TCBR. Ninety-two residents were trained carry out biomonitoring using Biological Monitoring Working Party (BMWP) index calibrated for reserve. BMWP uses macroinvertebrate families display numerical categorical scores. Additionally, Water Quality Index (WQI) was assessed Normalized Difference Vegetation (NDVI) riparian zones estimated each study site. mean WQI scores 69.24 RS (no treatment necessary crops public supply) 75.16 RG (minor purification requiring high-quality supply). showed five categories (Excellent, Very Good, Fair, Poor), showing higher upper portion basins capable discriminating sites lower close settlements. At one site, data from impelled taken address a pollution source influenced policy focus, reaching maximum level participatory-based monitoring. led avoid discharge wastewater into river conserve protect closely related BMWP; latter far more sensitive detecting affected domestic discharges. NDVI presented low values TCBR, being (the driest area). Although weak relationship values, generally achieved values. results highlight sensitivity detect several conditions running through TCBR when compared WQI. In addition, usefulness evident, as well importance inhabitants contributing knowledge biosphere reserves carrying timely that allow be maintained good condition.

Language: Английский

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Destiny of Two Caddisfly Species under Global Climate Change

Diversity, Journal Year: 2023, Volume and Issue: 15(9), P. 995 - 995

Published: Sept. 6, 2023

Climate change is considered one of the greatest threats to freshwater biodiversity. Although biodiversity an important contributor economic, scientific, and cultural aspects human society, species, especially invertebrates, tend be neglected in conservation studies. This fact also raises question suitability protected areas (PAs) for In our study, we used species distribution models (SDMs) examine effects climate on two trichopteran Helicopsyche bacescui Orghidan Botosaneanu, 1953 Thremma anomalum McLachlan, 1876. We determined which Balkans neighboring countries might lost or colonized by these future, tested effectiveness PAs biota. While H. will potentially lose up 68% its range, T. could expand range 72%. Both shift their mainly Carpathian Mountains. Our results suggest that currently established are insufficient cover potential current predicted future ranges studied species. The study therefore highlights need combine aquatic terrestrial systems designation areas.

Language: Английский

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Diatom assemblages in glacial-fed streams of Italian Western Alps

Botany Letters, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 17

Published: Sept. 16, 2024

Language: Английский

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