Impact of climate change and anthropogenic activities on aquatic ecosystem – A review

Environmental Research, Journal Year: 2023, Volume and Issue: 238, P. 117233 - 117233

Published: Oct. 2, 2023

Language: Английский

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Combined effects of heatwaves and micropollutants on freshwater ecosystems: Towards an integrated assessment of extreme events in multiple stressors research

Global Change Biology, Journal Year: 2021, Volume and Issue: 28(4), P. 1248 - 1267

Published: Nov. 4, 2021

Abstract Freshwater ecosystems are strongly influenced by weather extremes such as heatwaves (HWs), which predicted to increase in frequency and magnitude the future. In addition these climate extremes, freshwater realm is impacted exposure various classes of chemicals emitted anthropogenic activities. Currently, there limited knowledge on how combined HWs affects structure functioning ecosystems. Here, we review available literature describing single effects different levels biological organization, obtain a holistic view their potential interactive effects. We only found few studies (13 out 61 included this review) that investigated combination with chemical pollution. The reported varied largely not within trophic but also depending studied endpoints for populations or individuals. Hence, owing little number available, no consistent could be highlighted at any level organization. Moreover, an imbalance towards species population experiments, five using multitrophic approach. This results gap relevant community ecosystem endpoints, prevents exploration important indirect can compromise food web stability. impairs validity risk assessments our ability protect Finally, highlight urgency integrating extreme events into multiple stressors provide specific recommendations guide further experimental research regard.

Language: Английский

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Variability in epilimnion depth estimations in lakes

Hydrology and earth system sciences, Journal Year: 2020, Volume and Issue: 24(11), P. 5559 - 5577

Published: Nov. 24, 2020

Abstract. The epilimnion is the surface layer of a lake typically characterised as well mixed and decoupled from metalimnion due to steep change in density. concept (and, more widely, three-layered structure stratified lake) fundamental limnology, calculating depth essential understanding many physical ecological processes. Despite ubiquity term, however, there no objective or generic approach for defining epilimnion, diverse number approaches prevail literature. Given increasing availability water temperature density profile data lakes with high spatio-temporal resolution, automated calculations, using such data, are particularly common, they have vast potential use evolving long-term globally measured modelled datasets. However, multi-site multi-year studies, including those related future climate impacts, require robust algorithms estimation. In this study, we undertook comprehensive comparison commonly used estimation methods, combined 17-year dataset, over 4700 daily profiles two European lakes. Overall, found very large degree variability estimated across all methods thresholds investigated both These differences, manifesting high-frequency led fundamentally different understandings depth. addition, estimations were highly sensitive small changes threshold value, complex thermal column structures, vertical resolution. results call into question custom arbitrary method selection problems may cause studies interested estimating processes occurring within multi-lake comparisons, time series analysis. We also identified important systematic differences between which demonstrated how why diverged. provide rationale select an appropriate definition light their particular purpose awareness limitations individual methods. While prescribed selecting method, defined shallowest depth, where was 0.1 kg m−3 than density, be useful method.

Language: Английский

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Effect of Extreme Climate Events on Lake Ecosystems

Water, Journal Year: 2021, Volume and Issue: 13(3), P. 282 - 282

Published: Jan. 25, 2021

The Earth is facing a major change in climate due to ongoing global warming [...]

Language: Английский

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Long-term succession characteristics and driving factors of zooplankton communities in a typical subtropical shallow lake, central China

Environmental Science and Pollution Research, Journal Year: 2023, Volume and Issue: 30(17), P. 49435 - 49449

Published: Feb. 13, 2023

Language: Английский

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Investigating lake chlorophyll-a responses to the 2019 European double heatwave using satellite remote sensing

Ecological Indicators, Journal Year: 2022, Volume and Issue: 142, P. 109217 - 109217

Published: July 30, 2022

Compounded weather events such as sequential heatwaves are likely to increasingly impact freshwater ecosystems in the future. Satellite-derived chlorophyll-a concentration estimates for 36 European lakes during a widespread double heatwave event summer of 2019 show that deep and medium depth at higher latitudes displayed synchronous increase with temperature, possibly result an improved light climate resulting from increased stratification. Many or northern had notable response heatwaves. Warmer, southern shallow most asynchronous response, tending greater subsequent low pressure storm than itself. Chlorophyll-a peaks typically occurred five days after peak lakes. For some lakes, cycle several was found punctuate seasonal pattern chlorophyll-a. Notably, these nutrient-rich dwarfed by large algal blooms occurring later typical cyanobacterial bloom period early autumn, underlining importance timing phenology addition depth, latitude trophic state.

Language: Английский

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Response of stable isotopes (δ2H, δ13C, δ15N, δ18O) of lake water, dissolved organic matter, seston, and zooplankton to an extreme precipitation event

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 891, P. 164622 - 164622

Published: June 2, 2023

Lake ecosystems process and cycle organic substrates, thus serving as important bioreactors in the global carbon cycle. Climate change is predicted to increase extreme weather precipitation events that can flush nutrients matter from soils streams lakes. Here we report changes stable isotopes (δ2H, δ13C, δ15N, or δ18O) of water, dissolved (DOM), seston, zooplankton a subalpine lake at short time resolution following an event between early July mid-August 2021. Water excess runoff remained epilimnion coincided with increasing δ13C values seston (-30 ‰ -20 ‰), due input carbonates terrestrial matter. Particles settled into deeper layers after two days contributed uncoupling C N cycling responded this event. Following event, there was bulk (from -35 -32 ‰). Throughout study, DOM throughout water column (-29 -28 while large isotopic fluctuations δ2H (-140 -115 ‰) δ18O (+9 +15 suggested relocation turnover. Integrating isotope hydrology, ecosystem ecology, geochemistry offers element-specific, detailed approach investigating impact on freshwater particularly aquatic food webs.

Language: Английский

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The extent and variability of storm‐induced temperature changes in lakes measured with long‐term and high‐frequency data

Limnology and Oceanography, Journal Year: 2021, Volume and Issue: 66(5), P. 1979 - 1992

Published: April 7, 2021

Abstract The intensity and frequency of storms are projected to increase in many regions the world because climate change. Storms can alter environmental conditions ecosystems. In lakes reservoirs, reduce epilimnetic temperatures from wind‐induced mixing with colder hypolimnetic waters, direct precipitation lake's surface, watershed runoff. We analyzed 18 long‐term high‐frequency lake datasets 11 countries assess magnitude wind‐ vs. rainstorm‐induced changes temperature. found small day‐to‐day temperature decreases response strong wind heavy rain during stratified conditions. Day‐to‐day decreased, on average, by 0.28°C strongest windstorms (storm mean daily speed among lakes: 6.7 ± 2.7 m s −1 , 1 SD) 0.15°C after heaviest rainstorms rainfall: 21.3 9.0 mm). largest were observed ≥2 d sustained or (top 5 th percentile events for each lake) shallow medium‐depth lakes. smallest occurred deep Epilimnetic change windstorms, but not rainstorms, was negatively correlated maximum depth. However, even storm‐induced typically <2°C. change, absence storms, often exceeded changes. Because surface waters minimal, other limnological variables (e.g., nutrient concentrations light) may have larger impacts biological communities than

Language: Английский

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The importance of allochthonous organic matter quality when investigating pulse disturbance events in freshwater lakes: a mesocosm experiment

Hydrobiologia, Journal Year: 2021, Volume and Issue: 849(17-18), P. 3905 - 3929

Published: Nov. 30, 2021

Abstract Extreme precipitation is occurring with greater frequency and intensity as a result of climate change. Such events boost the transport allochthonous organic matter (allo-OM) to freshwater ecosystems, yet little known about impacts on dissolved (DOM) quality seston elemental stoichiometry, especially for lakes in warm climates. A mesocosm experiment located Turkish lake was designed simulate pulse event leading increased inputs allo-OM by examining individual effects increasing water colour (HuminFeed®, HF), direct extra energetic (alder tree leaf leachate, L), interactions single treatment (combination both sources, HFL), along comparison unmanipulated controls. Changes DOM nutrient stoichiometry additions examined over course experiments. Results indicated that there an increase high recalcitrant components HF treatment, contrast less aromatic microbially derived molecules L treatment. Unexpectedly, C:P ratios remained below severe P-limiting threshold plankton growth showed same temporal pattern all mesocosms. In contrast, N:P differed significantly between treatments, reducing conditions, whilst them. The combined HFL additive type interaction chlorophyll- highest Our results demonstrate accounting optical stoichiometric properties experimental treatments crucial improve capacity explain extrapolated conclusions regarding driven flooding ecosystems response global Graphical abstract

Language: Английский

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Multiple stressor effects of a heatwave and a herbicide on zooplankton communities: Implications of global climate change

Frontiers in Environmental Science, Journal Year: 2022, Volume and Issue: 10

Published: Nov. 10, 2022

Aquatic ecosystems are exposed to pesticides through various pathways such as spray-drift, agricultural runoff, and chemical spills. Understanding the impact of on freshwater requires not only understanding how affect aquatic organisms but also knowledge their interactions with other stressors, those related global climate change. Heatwaves extended periods temperature increase relative climatological mean. They increasing in frequency magnitude pose an emerging threat shallow ecosystems. In this study, we evaluated single combined effects herbicide terbuthylazine a simulated heatwave zooplankton communities using indoor microcosms. Terbuthylazine was applied at environmentally relevant concentration (15 µg/L). The consisted 6°C above control for period 7 days. When individually, increased total abundance by 3 times. exposure led indirect effect community structure, reducing some taxa. combination had no significant community, indicating additive dominated herbicide. interaction between two stressors chlorophyll-a concentrations apparently changed structure phytoplankton which may have benefitted cyanobacteria over green algae. Overall, study shows that non-chemical remains challenging task. Further studies should be conducted improve our mechanistic multiple stressor different levels biological organisation.

Language: Английский

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