Spatiotemporal variations of plankton communities in different water bodies of the Yellow River: Structural characteristics, biogeographic patterns, environmental responses, and community assembly

Journal of Hydrology, Год журнала: 2024, Номер 640, С. 131702 - 131702

Опубликована: Июль 21, 2024

Язык: Английский

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Assessing the factors influencing constructed wetland performance for mitigating agricultural nutrient runoff in the U.S.

Journal of Water Process Engineering, Год журнала: 2025, Номер 71, С. 107293 - 107293

Опубликована: Фев. 22, 2025

Язык: Английский

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Nutrients and warming interact to force mountain lakes into unprecedented ecological states

Proceedings of the Royal Society B Biological Sciences, Год журнала: 2020, Номер 287(1930), С. 20200304 - 20200304

Опубликована: Июль 8, 2020

While deposition of reactive nitrogen (N) in the twentieth century has been strongly linked to changes diatom assemblages high-elevation lakes, pronounced and contemporaneous other algal groups suggest additional drivers. We explored origin magnitude two mountain lakes from end Little Ice Age at ca 1850, 2010, using lake sediments. found dramatic community abundance composition. diatoms remain most abundant photosynthetic organisms, concentrations pigments decreased while representing chlorophytes increased 200-300% since 1950 total biomass more than doubled. Some began 1900 but shifts sedimentary proxies accelerated commensurate with many human-caused Earth System. In addition N deposition, aeolian dust may have contributed phosphorus. Strong increases summer air surface water temperatures 1983 direct indirect consequences for ecosystems. Such warming could directly enhanced nutrient use primary production. Indirect include leaching nutrients geologic cryosphere sources, particularly as glaciers ablate. we infer causal mechanisms, producer communities appear be without historical precedent are post-1950 acceleration global change.

Язык: Английский

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High-mountain lakes as indicators of microplastic pollution: current and future perspectives

Опубликована: Янв. 1, 2022

As a key component of mountain ecosystems, high-mountain lakes are recognized indicators global change. In the analysis effects induced by local or human activities, microplastic (MP) pollution is critical environmental concern for ecosystem compartments and in particular. This minireview reports on current knowledge MP occurrence, source, distribution, characteristics lake ecosystems. The literature search returned only nine studies mainly from Tibet plateau (China). Generally, two most often investigated were water sediment, followed snow fish. Plastic particles found as fragments fibers polypropylene polyethylene, which primarily utilized food packaging supplies brought tourists then discarded site. Tourism atmospheric long-range transport lowlands identified main sources pollution. Precipitation events (snow rain) reported deposition fallout. Further needed to better understand aquatic webs resources (e.g., drinking water) these

Язык: Английский

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Shifting Patterns of Summer Lake Color Phenology in Over 26,000 US Lakes

Water Resources Research, Год журнала: 2021, Номер 57(5)

Опубликована: Май 1, 2021

Abstract Lakes are often defined by seasonal cycles. The timing, or phenology, of many lake processes changing in response to human activities. However, long‐term records exist for few lakes, and extrapolating patterns observed these lakes entire landscapes is exceedingly difficult using the limited number available situ observations. Limited landscape‐level observations mean we do not know how common shifts phenology at macroscales. Here, use a new remote sensing data set, LimnoSat‐US, analyze U.S. summer color between 1984 2020 across more than 26,000 lakes. Our results show that seasonality can be generalized into five distinct groups follow well‐known phytoplankton succession. frequency with which transition from one group another tied landscape level characteristics. high inflows low variation their surface area generally stable, while areas interannual variations climate catchment population density less stability. reveal previously unexamined spatiotemporal demonstrate utility which, over 22 million creates novel opportunities examine ecosystems national scale.

Язык: Английский

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Climate Change, Ecosystem Processes and Biological Diversity Responses in High Elevation Communities

Climate, Год журнала: 2021, Номер 9(5), С. 87 - 87

Опубликована: Май 19, 2021

The populations, species, and communities in high elevation mountainous regions at or above tree line are being impacted by the changing climate. Mountain systems have been recognized as both resilient extremely threatened climate change, requiring a more nuanced understanding of potential trajectories biotic communities. For particular, we need to consider how interactions among drivers topography currently structure diversity, species composition, life-history strategies these Further, predicting responses requires knowledge intra- inter-specific associations within context topographically heterogenous landscapes. Changes temperature, snow, rain characteristics regional scales amplified attenuated slope, aspect, wind patterns occurring local that often under hectare even meter extent. Community assemblages structured soil moisture growing season duration sites, directional change has alter two together, independently, opposition one another due local, intervening variables. threaten whose water requirements locally extirpated who may be outcompeted nearby faster-growing, warmer/drier adapted species. However, barring non-analogue conditions, also able easily track required resource regimes New arrivals composed competitors, predators pathogens can further mediate direct impacts Plants moving uphill, demonstrating primary succession with emergence new habitats from snow rock, but shifts constrained over short term limitations microbes ultimately lack colonizable terrestrial surfaces. Meanwhile, subalpine herbaceous woody pose threats cold-adapted Overall, multiple interacting indirect effects on lead for systems.

Язык: Английский

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The role of warm, dry summers and variation in snowpack on phytoplankton dynamics in mountain lakes

Ecology, Год журнала: 2020, Номер 101(10)

Опубликована: Июль 6, 2020

Abstract Climate change is altering biogeochemical, metabolic, and ecological functions in lakes across the globe. Historically, mountain temperate regions have been unproductive because of brief ice‐free seasons, a snowmelt‐driven hydrograph, cold temperatures, steep topography with low vegetation soil cover. We tested relative importance winter summer weather, watershed characteristics, water chemistry as drivers phytoplankton dynamics. Using boosted regression tree models for 28 Colorado, we examined regional, intraseasonal, interannual variability chlorophyll proxy lake phytoplankton. Phytoplankton biomass was inversely related to maximum snow equivalent (SWE) previous winter, others found. However, even years average SWE, precipitation extremes warming enhanced biomass. Peak seasonal coincided warmest temperatures lowest nitrogen‐to‐phosphorus ratios. Although links between snowpack, temperature, nutrients, organic‐matter dynamics are increasingly recognized critical high‐elevation lakes, our results highlight additional influence conditions on productivity response ongoing changes climate. Continued timing, type, magnitude combination other global‐change (e.g., nutrient deposition) will affect production potentially shifting these historically oligotrophic toward new ecosystem states. Ultimately, deeper understanding pattern at multiple scales allow us anticipate consequences global better.

Язык: Английский

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Winter Climate and Lake Morphology Control Ice Phenology and Under‐Ice Temperature and Oxygen Regimes in Mountain Lakes

Journal of Geophysical Research Biogeosciences, Год журнала: 2021, Номер 126(8)

Опубликована: Авг. 1, 2021

Abstract Warming winters will reduce ice cover and change under‐ice conditions in temperate mountain lakes, where snow contributes most of winter on lakes. Snow‐dominated lakes are abundant highly susceptible to climate warming, yet we lack an understanding how variation local attributes influence processes. We investigated climatic intrinsic controls phenology, water temperature, bottom‐water dissolved oxygen (DO) 15 morphologically diverse the Sierra Nevada Klamath Mountains California, USA, using high‐frequency measurements from multiple (2–5) winters. found that phenology was determined by variables (snowfall air temperature) ice‐off timing, whereas ice‐on timing relatively invariant among years. Lake size morphology mediated effect lake temperature DO dynamics early late winter. Rates hypolimnetic decline were highest small, shallow unrelated temperature. Temperature more variable small because heavy snowfall caused submergence, mixing, replenishment affected entire column. As persistence declines regions, autumn, spring expected gain importance regulating phenology. Water likely increase during as snowpack declines, but morphological such determine sensitivity processes change.

Язык: Английский

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Response of water quality to climate warming and atmospheric deposition in an alpine lake of Tianshan Mountains, Central Asia

Ecological Indicators, Год журнала: 2023, Номер 147, С. 109949 - 109949

Опубликована: Янв. 30, 2023

Alpine lakes are usually unaffected by anthropogenic disturbance, yet these aquatic ecosystems highly sensitive to climate warming and atmospheric deposition. It is unclear how water quality of alpine has responded environmental changes. Unprecedented degradation in (characterized nutrient enrichment phytoplankton blooms) had occurred the Tianchi Lake, an lake Tianshan Mountains. Here we measured dust precipitation chemistry assess source, magnitude, impact deposition on stoichiometry Lake. Long-term (2015–2021) limnological data consisted chlorophyll were used quantify trends quality, as well association between biomass air temperature. We proposed a critical model based guarantee probability estimate maximum allowable load. The results indicated that pollutants from urban agglomeration derived semi-arid region represented primary sources nutrient, which contributed 6.86 t nitrogen (N) 0.23 phosphorus (P) during 2021. Enhanced fertilization effect due high was expected promote blooms, but unbalanced N:P ratio would exacerbate P limitation productivity. Climate seemed equally crucial synergistically stimulate growth, first appearance blooms corresponded beginning warm period. Further studies shown increase frequency duration heat waves accelerate eutrophication. To mitigate degradation, suggested 40.63 N 0.49 should be reduced. conclude synergistic effects even though it protected strict policies. More conducted potential ensure safety ecological security.

Язык: Английский

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Interactive effects of climate-atmospheric cycling on aquatic communities and ecosystem shifts in mountain lakes of southeastern Tibetan Plateau

The Science of The Total Environment, Год журнала: 2024, Номер 914, С. 169825 - 169825

Опубликована: Янв. 8, 2024

Язык: Английский

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