Climate change and variability in sub-Saharan Africa: A systematic review of trends and impacts on agriculture

Journal of Cleaner Production, Journal Year: 2023, Volume and Issue: 414, P. 137487 - 137487

Published: June 5, 2023

Language: Английский

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Extent, patterns, and drivers of hypoxia in the world's streams and rivers

Limnology and Oceanography Letters, Journal Year: 2022, Volume and Issue: 8(3), P. 453 - 463

Published: Dec. 8, 2022

Abstract Hypoxia in coastal waters and lakes is widely recognized as a detrimental environmental issue, yet we lack comparable understanding of hypoxia rivers. We investigated controls on using 118 million paired observations dissolved oxygen (DO) concentration water temperature over 125,000 locations rivers from 93 countries. found (DO < 2 mg L −1 ) 12.6% all river sites across 53 countries, but no consistent trend prevalence since 1950. High‐frequency data reveal 3‐h median duration hypoxic events which are most likely to initiate at night. River attributes were better predictors riverine occurrence than watershed land cover, topography, climate characteristics. was more occur warmer, smaller, lower‐gradient rivers, particularly those draining urban or wetland cover. Our findings suggest that the resulting impacts ecosystems may be pervasive previously assumed.

Language: Английский

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On farmers’ perceptions of climate change and its nexus with climate data and adaptive capacity. A comprehensive review

Environmental Research Letters, Journal Year: 2022, Volume and Issue: 17(8), P. 083002 - 083002

Published: July 14, 2022

Abstract Farmers’ perception of climate change is crucial in adaptation intention and process. However, farmers’ perceptions may not be timely, accurate systematically consistent with the direction significance observational records. Although some research compared data, little attention has been paid to comprehensibly analyse both data sources discrepancies based on empirical studies results. By combining bibliometrics a systematic review approach, we identify which approaches are used compare perceived observed how patterns have mutually evolved, factors determine their (in)consistency, if accordance robustness affect adaptive capacity. We portfolio 147 papers collected from Scopus library catalogue since 2000. The bibliometric analysis was coupled an exploratory 98 selected original portfolio. literature extensive, fast-growing, spans several disciplines. four consolidated lines: (a) risk capacity nexus, (b) crop vulnerability due temperature increase erratic rainfall patterns, (c) forecasting use influence decisions, (d) awareness conditioning profiles. Nonetheless, observe gaps: conceptual mismatch ‘normal pattern’ or ‘drought’ meaning, poor limited meteorological stations, overlook oversimplification local knowledge describing perception, memory weaknesses keep track alterations, (e) geographical dissonance favour Global South regions. Our science-metric study also reveals questions consolidated: Can extreme events awareness? greater reduce discrepancy data? How do heuristics socio-psychological filters interpretation suggest putting major efforts into reinforcing these lines as part novel domain-dependent trend discrepancy.

Language: Английский

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Recent trends in stream macroinvertebrates: warm-adapted and pesticide-tolerant taxa increase in richness

Biology Letters, Journal Year: 2022, Volume and Issue: 18(3)

Published: March 1, 2022

Recently, a plethora of studies reporting insect declines has been published. Even though the common theme is decreasing richness, positive trends have also documented. Here, we analysed nationwide, systematic monitoring data on aquatic richness collected at 438 sites in Switzerland from 2010 to 2019. In addition taxonomic grouped taxa accordance with their ecological preferences and functional traits gain better understanding possible underlying mechanisms. We found that general, insects remained stable or increased time. Warm-adapted taxa, feeding guilds pesticide-tolerant showed increasing patterns while cold-adapted, rarer pesticide-sensitive displayed trends. Both climate land-use-related factors were most important explanatory variables for richness. Although our cover last decade only, results suggest recent developments are context-dependent affect groups differently. However, longer investigations good baseline reveal if increase temperature- species will lead decrease specialized homogenization biotic communities long term.

Language: Английский

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Forest buffer-strips mitigate the negative impact of oil palm plantations on stream communities

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 873, P. 162259 - 162259

Published: Feb. 20, 2023

The global area cultivated with oil palm has doubled in the past two decades, causing deforestation, land-use change, freshwater pollution, and species loss tropical ecosystems worldwide. Despite palm-oil industry been linked to severe deterioration of ecosystems, most studies have focused on terrestrial environments, while freshwaters significantly less studied. We evaluated these impacts by contrasting macroinvertebrate communities habitat conditions 19 streams from primary forests (7), grazing lands (6), plantations (6). In each stream, we measured environmental characteristics, e.g., composition, canopy cover, substrate, water temperature, quality; identified quantified assemblage macroinvertebrates. Streams lacking riparian forest strips showed warmer more variable temperatures, higher turbidity, lower silica content, poorer taxon richness than forests. Grazing conductivity dissolved oxygen contrast, that conserved a forest, substrate cover similar ones These improvements increased maintained community resembling one Therefore, conversion (instead forests) can increase only if native are safeguarded.

Language: Английский

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Seasonal Variations in Macrobenthos Communities and Their Relationship with Environmental Factors in the Alpine Yuqu River

Biology, Journal Year: 2025, Volume and Issue: 14(2), P. 120 - 120

Published: Jan. 24, 2025

This study investigated the spatial and temporal variations of macrobenthos community structure in Yuqu River Basin during dry wet seasons due to environmental factors. quantified independent interactive contributions hydrophysical, hydrochemical, climatic factors through a variance decomposition analysis (VPA). The findings indicate that May (the season), such as water depth, flow velocity, dissolved oxygen, air temperature exhibit relatively minor fluctuations, rendering aquatic environment more stable than rainy season. stability is particularly conducive maintenance macrobenthic species diversity, which especially evident insects with nesting habits, those belonging Trichoptera order (including genera like Glossosoma, Glossosomatidae, Georodes). In contrast, August substantial precipitation alters thermal conditions river, increases raises levels, introduces significant influx organic matter sedimentation. distinctive ecological fosters unique adaptive strategies among organisms. Notwithstanding notable decline diversity this particular phase, there concurrent increase abundance individual organisms, indicative populations’ remarkable capacity swiftly adapt heterogeneity. Research has demonstrated communities within adopt pronounced tactics vary significantly between seasons. During season, these fauna rely heavily on their physical habitat. stark they are compelled navigate cope intricate dynamic changes hydrological chemical characterize presented results uncover sensitive responsiveness seasonal fluctuations high-altitude river systems under diverse stressors. Arthropods, particular, marked sensitivity changes. delves into biodiversity ecosystems, analyzing distribution patterns variation characteristics communities. aims examine how hydroclimatic modulate composition assemblages tributaries principal channels systems, thereby establishing foundational reference for future ecosystem assessments regions.

Language: Английский

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Assessment of leaf litter decomposition for biomonitoring in urban watercourses under contrasting thermal conditions

Environmental Monitoring and Assessment, Journal Year: 2025, Volume and Issue: 197(5)

Published: April 14, 2025

Language: Английский

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Spatiotemporal assessment of benthic macroinvertebrate communities in the Bermejo River Basin in the Ecuadorian Amazonia

Limnology and Oceanography Letters, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract The Cofán communities rely on the Bermejo Ecological Reserve for their survival and cultural practices. Due to rugged inaccessible topography of reserve in Northern Ecuadorian Amazon region, limited biomonitoring ecological characterization studies ecosystem health have been conducted. We investigated community composition functional structure benthic macroinvertebrates River basin by identifying bioindicators measuring physicochemical variables. Our results indicated that predators were consistently dominant taxa all sampled sites, taxonomic abundance was positively correlated with richness collector taxa. also observed positive relations between pH abundance, water temperature biological monitoring working party metric. Primary associations found feeding guilds, pollution‐sensitive taxa, indices. This work provided a first macroinvertebrate parameters basin.

Language: Английский

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A new index of a water temperature equivalent for summer respiration conditions of benthic invertebrates in rivers as a bio-indicator of global climate change

Limnologica, Journal Year: 2022, Volume and Issue: 95, P. 125980 - 125980

Published: May 6, 2022

Detailed information on species temperature preferences are needed to measure the effects of global warming and communities in European rivers. However, currently available literature taxon-specific or tolerances is very heterogeneous therefore not well suited for forecasting purposes. To close this gap, we derived so-called 'central tendencies' (CTTt values) benthic invertebrate species. For end, 547 data from regional monitoring programmes Germany collected at 4249 sites were analysed. Due vulnerability high temperatures, CTTt values calculated mean summer following a robust approach calculating weighted average based classes. Derived correspond as reported long latter homogeneous terms how they which reference was focus. Based values, community value, CTTCom, each sample. CTTCom validated by correlation with water temperatures. As slope linear regression model between measured temperatures comparatively low (a = 0.49), correction function order optimise relation both. This crucial, because it assumed that although solely taxa abundances within classes, only reflects effect (summer) itself, but also corresponds equivalent describes overall quality all respiration-relevant aquatic habitat conditions determine metabolism respective invertebrates. By comparing value year previous sampling, statements can be made about influence flow other factors determining oxygen availability. Thus, aerobic scope fauna: better respiration rheophilic demand, larger lower CTTCom. The taken our study promising provides tool track even project past, present, future impacts invertebrates rivers respiratory relevant environmental variables. We encourage stakeholders field freshwater ecology test tool, already use river management practice known under short KLIWA-IndexMZB KIMZB.

Language: Английский

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Effect of land use type on macrobenthos assemblages, distribution, and functional guild in Upstream Citarum River

Ecological Indicators, Journal Year: 2024, Volume and Issue: 160, P. 111849 - 111849

Published: March 1, 2024

Aquatic community biodiversity is gradually impacted by the expansion and intensification of agricultural urbanization land use. However, data on macrobenthos responses to use in tropical streams are relatively limited. This study aims investigate diversity, functional guild, physicochemical parameters Upstream Citarum River type, area. A total 317 species from 21 families, 11 orders three phyla were identified, with having highest abundance macroinvertebrates (222 individuals), followed (95 individuals). Ecological indices, including evenness, dominance, margalef displayed similar patterns across different types. Contribution upstream based Similarity Percentage (SIMPER) analysis Hydropychidae Palaemonidae. Filter collectors (FC) had density (78.829%) use, while scrapers (SC) (87.37%) Nepidae Palaemonidae showed positive correlations temperature, organic carbon (TOC) matter (TOM). The concludes that river communities guilds influenced type water quality. effect will provide management for further help sustainability stream implication policy future studies.

Language: Английский

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