Global historical trends and drivers of submerged aquatic vegetation quantities in lakes

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(9), P. 2493 - 2509

Published: Feb. 14, 2023

Submerged aquatic vegetation (SAV) in lake littoral zones is an inland water wetland type that provides numerous essential ecosystem services, such as supplying food and habitat for fauna, regulating nutrient fluxes, stabilizing sediments, maintaining a clear state. However, little known on how SAV quantities are changing globally response to human activities, where loss threatens the provisioning of these services. In this study, we generate comprehensive global synthesis trends using time series (>10 years) lakes identify their main drivers. We compiled across methods metrics, integrating both observational paleolimnological approaches well diverse measures quantities, including areal extent, density, or abundance classes. The compilation revealed knowledge mostly derived from temperate regions, with major gaps tropical, boreal, mountainous lake-rich regions. Similar other types, found 41% times largely decreasing due land use change resulting eutrophication. is, however, increasing 28% cases, primarily since 1980s. show drivers vary regionally, increases Europe explained mainly by management, decreases Asia eutrophication change, variable North America consistent invasive species arrival. By providing quantitative portrait worldwide, future research priorities. considering different trends, also offer insight management related climate, positive restoration actions, community structure quantities.La végétation aquatique submergée (VAS) dans la zone littorale des lacs fait partie milieux humides eaux continentales et soutient plusieurs services écologiques, tels que fournir un pour faune, réguler les flux de nutriments stabiliser sédiments. Cependant, comment changements quantités VAS varient mondialement en réponse aux activités humaines demeurent peu connu, alors leur perte menace le maintien ces écologiques. Dans cette étude, nous avons généré une synthèse globale séries temporelles identifié leurs tendances facteurs explicatifs. Nous compilé à travers méthodes métriques, intégrant fois approches observationnelles paléolimnologiques ainsi mesures diverses quantité VAS, telles superficie couverture, densité classes d'abondance. La révélé connaissances sur proviennent surtout régions tempérées, avec d’information boréales, tropicales montagneuses riches lacs. Comme autres types humides, trouvé est largement déclin, tel reporté principalement cause d’utilisation du territoire l’eutrophisation. cependant augmentation 28 % cas, depuis années 1980. montrons explicatifs par région. En Europe, augmentations sont expliquées gestion, Asie, déclin fonction l’eutrophisation territoire, qu’en Amérique Nord variables associées l’arrivée nouvelles espèces. fournissant quantitatif monde, indiquons lacunes futures priorités recherche. se penchant explicatifs, offrons informations l’influence climat, actions restauration positives changement communautés qui pourront informer gestionnaires

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Assessing the ecological impact of pesticides/herbicides on algal communities: A comprehensive review

Aquatic Toxicology, Journal Year: 2024, Volume and Issue: 268, P. 106851 - 106851

Published: Jan. 28, 2024

Language: Английский

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Land use and river-lake connectivity: Biodiversity determinants of lake ecosystems

Environmental Science and Ecotechnology, Journal Year: 2024, Volume and Issue: 21, P. 100434 - 100434

Published: May 28, 2024

Lake ecosystems confront escalating challenges to their stability and resilience, most intuitively leading biodiversity loss, necessitating effective preservation strategies safeguard aquatic environments. However, the complexity of ecological processes governing lake under multi-stressor interactions remains an ongoing concern, primarily due insufficient long-term bioindicator data, particularly concerning macroinvertebrate biodiversity. Here we utilize a unique, continuous, in situ biomonitoring dataset spanning from 2011 2019 investigate spatio-temporal variation communities. We assess impact four crucial environmental parameters on Dongting Taihu, i.e., water quality, hydrology, climate change, land use. These two systems are representative lakes with Yangtze-connected disconnected subtropical floodplains China. find alarming trend declining taxonomic functional diversities among communities despite improvements quality. Primary contributing factors this decline include persistent anthropogenic pressures, alterations human use around lakes, including intensified nutrient loads reduced habitat heterogeneity. Notably, river-lake connectivity is pivotal shaping differential responses multiple stressors. Our results highlight strong correlation between within 2–5 km radius 0.05–2.5 shorelines Lakes respectively. findings importance implementing buffer zones specific spatial scales enhance diversity, securing essential ecosystem services enhancing resilience ecosystems.

Language: Английский

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Global Lake Health in the Anthropocene: Societal Implications and Treatment Strategies

Earth s Future, Journal Year: 2024, Volume and Issue: 12(4)

Published: April 1, 2024

Abstract The world's 1.4 million lakes (≥10 ha) provide many ecosystem services that are essential for human well‐being; however, only if their health status is good. Here, we reviewed common lake issues and classified them using a simple health‐based approach to outline living systems in need of oxygen, clean water balanced energy nutrient supply. main reason adopting some the terminology classification increase awareness understanding global issues. We show exposed various anthropogenic stressors which can result issues, ranging from thermal, circulatory, respiratory, nutritional metabolic infections poisoning. Of particular concern well‐being widespread drying, severe circulatory issue with cascading effects on health. estimated ∼115,000 evaporate twice as much they gain direct precipitation, making vulnerable potential drying inflowing waters follow trend, putting more than 153 people at risk who live close vicinity those lakes. Where remain untreated, will decline or even vanish, posing threat millions people. recommend coordinated multisectoral multidisciplinary prevention treatment strategies, include follow‐up progress an assessment resilience intensifying threats. Priority should be given implementing sewage treatment, mitigating climate change, counteracting introductions non‐native species decreasing uncontrolled releases chemicals into hydro‐, bio‐, atmosphere.

Language: Английский

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Combined stress of an insecticide and heatwaves or elevated temperature induce community and food web effects in a Mediterranean freshwater ecosystem

Water Research, Journal Year: 2024, Volume and Issue: 260, P. 121903 - 121903

Published: June 6, 2024

Ongoing global climate change will shift nature towards Anthropocene's unprecedented conditions by increasing average temperatures and the frequency severity of extreme events, such as heatwaves. While climatic changes pose an increased threat for freshwater ecosystems, other stressors like pesticides may interact with warming lead to unpredictable effects. Studies that examine underpinned mechanisms multiple stressor effects are scarce often lack environmental realism. Here, we conducted a experiment using outdoor mesocosms natural assemblages macroinvertebrates, zooplankton, phytoplankton, macrophytes, microbes. The neonicotinoid insecticide imidacloprid (1 µg/L) were investigated in combination three temperature scenarios representing ambient, elevated (+4°C), heatwaves (+0 8°C), latter two having similar energy input. We found dissipation patterns all treatments lowest half-lives under both (DT50: 3 days) highest ambient 4 throughout experiment. Amongst communities, only zooplankton community was significantly affected combined treatments. This demonstrated low chemical sensitivity lagged significant negative cyclopoids. Heatwaves caused early long-lasting on compared temperatures, Polyarthra, Daphnia longispina, Lecanidae, cyclopoids being most negatively taxa, whereas Ceriodaphnia nauplii showed positive responses temperature. Community recovery from stress slower heatwaves, suggesting temperature-enhanced toxicity. Finally, microbial macrofauna litter degradation enhanced temperature, also imidacloprid. A structural equation model depicted cascading food web stronger relationships at higher than lower trophic levels. Our study highlights series imidacloprid-stressed freshwaters.

Language: Английский

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Heatwaves, elevated temperatures, and a pesticide cause interactive effects on multi-trophic levels of a freshwater ecosystem

Environmental Pollution, Journal Year: 2023, Volume and Issue: 327, P. 121498 - 121498

Published: March 23, 2023

Climate impacts of elevated temperatures and more severe frequent weather extremes like heatwaves are globally becoming discernible on nature. While a mechanistic understanding is pivotal for ecosystem management, stressors pesticides may interact with warming, leading to unpredictable effects freshwater ecosystems. These multiple stressor studies scarce experimental designs often lack environmental realism. To investigate the effects, we conducted microcosm experiment 48 days comprising benthic macroinvertebrates, zooplankton, phytoplankton, macrophytes, microbes. The fungicide carbendazim (100 μg/L) was investigated combined temperature scenarios representing (+4 °C) or (+0 +8 °C), both applied similar energy input daily fluctuating ambient (18 °C ± 1.5 which served as control. Measurements showed highest dissipation in water under followed by temperatures. Average concentrations were about 50% 16% sediment nominal concentration. In heated cosms, zooplankton community dynamics revealed an unexpected shift from Rotifera Cladocera Copepoda nauplii, indicating variations their thermal sensitivity, tolerance resilience. Notably, warming shaped responses similarly, suggesting heat intensity rather than distribution patterns determined structure. Heatwaves led significant early longer-lasting adverse that exacerbated over time being most sensitive likely due interactions. Finally, structural equation model demonstrated relationships between macrophytes significantly negative whereas positive macroinvertebrate abundances. relationship feeding abundance masked temperature-affected microbial leaf litter decomposition. Despite communities, our study highlights increased pesticide threat extremes. More intense thus cause alterations assemblages will adversely affect ecosystem's processes functions.

Language: Английский

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Warming lowers critical thresholds for multiple stressor–induced shifts between aquatic primary producers

The Science of The Total Environment, Journal Year: 2022, Volume and Issue: 838, P. 156511 - 156511

Published: June 6, 2022

Language: Английский

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Heat waves rather than continuous warming exacerbate impacts of nutrient loading and herbicides on aquatic ecosystems

Environment International, Journal Year: 2022, Volume and Issue: 168, P. 107478 - 107478

Published: Aug. 18, 2022

Submerged macrophytes are vital components in shallow aquatic ecosystems, but their abundances have declined globally. Shading by periphyton and phytoplankton/turbidity plays a major role this decline, the competing primary producers subject to complex influence of multiple stressors such as increasing temperatures, nutrient loading herbicides. Their joint impact has rarely been tested is difficult predict due potentially opposing effects on different producers, interactions grazers. Here, we used 48 mesocosms (2500 L) simulate lakes dominated two typical submerged macrophytes, bottom-dwelling Vallisneria denseserrulata canopy-forming Hydrilla verticillata, associated food web components. We applied combination loading, continuous warming, heat waves glyphosate-based herbicides test how these interactively growth phytoplankton producers. Warming or alone did not affect abundance, negatively influenced biomass V. denseserrulata. Nutrient increased water turbidity thus affected macrophyte biomass, particularly for denseserrulata, shading. Glyphosate each producer under ambient temperatures. However, facilitated combined glyphosate treatments more than warming. As consequence, H. verticillata was lowest conditions indicating potential decline. Our study demonstrated that alter can eventually lead loss communities shift dominance. These results show risks ponds agricultural landscapes underline need stressor studies base future management.

Language: Английский

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A synthesis of a coastal northern pike (Esox lucius) fishery and its social-ecological environment in the southern Baltic Sea: Implications for the management of mixed commercial-recreational fisheries

Fisheries Research, Journal Year: 2023, Volume and Issue: 263, P. 106663 - 106663

Published: March 28, 2023

Language: Английский

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Unlocking secrets of microbial ecotoxicology: recent achievements and future challenges

FEMS Microbiology Ecology, Journal Year: 2023, Volume and Issue: 99(10)

Published: Sept. 4, 2023

Environmental pollution is one of the main challenges faced by humanity. By their ubiquity and vast range metabolic capabilities, microorganisms are affected with consequences on host organisms functioning environment. They also play key roles in fate pollutants through degradation, transformation, transfer organic or inorganic compounds. Thus, they crucial for development nature-based solutions to reduce bio-based environmental risk assessment chemicals. At intersection between microbial ecology, toxicology, biogeochemistry, ecotoxicology a fast-expanding research area aiming decipher interactions microorganisms. This perspective paper gives an overview identified Ecotoxicomic network within emerging One Health framework light ongoing interest biological approaches remediation current state art ecology. We highlight prevailing knowledge gaps pitfalls exploring complex among environment context chemical pinpoint areas where future efforts needed.

Language: Английский

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