LSTM time series NDVI prediction method incorporating climate elements: A case study of Yellow River Basin, China

Journal of Hydrology, Год журнала: 2023, Номер 629, С. 130518 - 130518

Опубликована: Ноя. 21, 2023

Язык: Английский

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Influence of the dietary contribution of terrestrial insects to the condition factor of bleak Alburnus alburnus in a highly polluted lowland river

Journal of Fish Biology, Год журнала: 2024, Номер unknown

Опубликована: Июнь 5, 2024

Abstract Bleak Alburnus alburnus is a highly abundant but understudied fish species, and we know little about the trophic ecology of populations inhabiting rivers in central Europe. From an ecosystem perspective, this species interesting as it known to feed on surface insects, thereby linking terrestrial with aquatic habitat. In previous study, demonstrated that flux intensified, dietary contribution insects higher sections Spree River, Germany, are polluted from iron oxides occurring former lignite mining activities, thus characterized by lower abundances insects. As can be considered food quality (measured long‐chained polyunsaturated fatty acids, n‐3 LC‐PUFAs) compared prey, reasonable assume related body condition fish. explore riverine A . their fitness consequences feeding We therefore modeled index stable isotopes hydrogen (δ 2 H) measured muscle tissue individuals caught locations upstream dam were greatly influenced oxides, located downstream where passive remediation technologies applied. The was significantly at high‐iron concentrations, low unpolluted habitats low‐iron concentrations. contradiction our hypothesis, had no significant effect Fulton's factor K ) (i.e., concentrations) positive, albeit weak, concentrations). However, generally section, potentially more direct effects oxide. conclude , less‐favored food, unless occur environments limited availability. Further research needed evaluate indirect effects, including internal LC‐PUFA synthesis adaption toward low‐quality prey

Язык: Английский

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Effects of mining activities on fish communities and food web dynamics in a lowland river

Ecology and Evolution, Год журнала: 2024, Номер 14(3)

Опубликована: Март 1, 2024

Abstract Fish communities of streams and rivers might be substantially subsidized by terrestrial insects that fall into the water. Although such animal‐mediated fluxes are increasingly recognized, little is known about how anthropogenic perturbations may influence strength exchanges. Intense land use, as lignite mining, impact a river ecosystem due to flocculation iron (III) oxides, thus altering food web dynamics. We compared sections Spree River in North‐East Germany were greatly influenced oxides with located downstream dam where passive remediation technologies applied. Compared locations dam, abundance benthic macroinvertebrates at high concentrations upstream was significantly reduced. Similarly, catch per unit effort all fish higher condition juvenile adult piscivorous pike Esox lucius lower concentrations. Using an estimate short‐term (i.e., metabarcoding gut content) well longer‐term hydrogen stable isotopes) resource we could demonstrate three most abundant species, perch Perca fluviatilis , roach Rutilus rutilus bleak Alburnus alburnus received contributions their diet concentration. In summary, lotic webs differed overall structure respect energy available for highest tropic levels contribution omnivorous fish. Therefore, human‐induced environmental perturbations, damming mining activities, represent strong pressures can alter flow between aquatic systems, indicating broad on landscape level.

Язык: Английский

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Water dynamics and evaporation losses to inflows into transboundary Mediterranean lakes – the case of Prespa Lakes

Hydrological Sciences Journal, Год журнала: 2025, Номер unknown

Опубликована: Янв. 7, 2025

Stable isotope techniques (δ18Ο, δ2Η of H2O) were applied in the transboundary Prespa Lakes (Great and Little Prespa) to assess water dynamics evolution evaporation losses over decades. The lakes currently experience high inflows (E/I > 60 %), which are significantly higher than 1980ʹs. results showed that Great Lake (GPL) level decline could be due a drastic decrease lake's years climate change abstractions. River runoff contributed more (~57 %) recharge GPL wet period, whereas dry period direct precipitation was significant. Our work highlights advantage using stable address hydrological problems comparison conventional methods need for collaborative efforts between countries ensure sustainable usage resources.

Язык: Английский

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Identifying seasonal sources and processes controlling nitrate in a typical reservoir-type headwater watershed of Eastern China using stable isotopes

Agriculture Ecosystems & Environment, Год журнала: 2025, Номер 386, С. 109615 - 109615

Опубликована: Март 8, 2025

Язык: Английский

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DREAM_(LoAX): Simultaneous Calibration and Diagnosis for Tracer‐Aided Ecohydrological Models Under the Equifinality Thesis

Water Resources Research, Год журнала: 2025, Номер 61(3)

Опубликована: Март 1, 2025

Abstract The Limits of Acceptability approach has been demonstrated to be an effective conditioning tool due its capacity consider epistemic uncertainty. However, application faces two challenges—the low efficiency when random sampling is used and the difficulty in setting limits prior calibration. Here algorithm DREAM (LoAX) was developed added GLUE framework. As extension (LoA) Vrugt Beven (2018), https://doi.org/10.1016/j.jhydrol.2018.02.026 , it evaluates model performance based on limit boundaries, thus inherits merits framework (explicit consideration errors). Moreover, importance initial choice strongly reduced by allowing iterative evolution historical performance. By testing a series examples (including high‐dimensional numeric example, single‐objective hydrological multi‐objective example) with or without error‐free assumption using synthetic real observations, search locate acceptable models demonstrated. also shows comparable . More importantly, provides real‐time diagnostic information regarding (at which timestep) where (for objective) how (to direction extent) fails uncertainty pronounced, potential sources data flaws structure identified. In this context, not only useful tool, but learning for development improved modeling.

Язык: Английский

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Analysis of the Recharge Area of the Perrot Spring (Aosta Valley) Using a Hydrochemical and Isotopic Approach

Water, Год журнала: 2023, Номер 15(21), С. 3756 - 3756

Опубликована: Окт. 27, 2023

The Perrot Spring (1300 m a.s.l.), located to the right of Chalamy valley in Monte Avic Natural Park (Valle d’Aosta, Italy), is an important source drinking water for municipality Champdepraz. This spring on a large slope characterised by presence Quaternary cover various origins (glacial, glaciolacustrine, and landslide) above bedrock (essentially serpentinite referred Zermatt–Saas Zone, Penninic Domain). Water emerges at contact between landslide bodies impermeable or semi-permeable glaciolacustrine deposits. aim this study define processes recharge zones spring. analysis data revealed two contributions input: thaw contribution defined small increase flow autumn from rainwater infiltration. low average temperature variation annual (4.8–6.5 °C) suggest sufficiently deep circuit. Chemical analyses showed groundwater chemistry consistent with regional geology: hydrochemical facies calcium–magnesium bicarbonate isotopic (δ2H δ18O) rainfall suggested altitude about 2100 a.s.l. In conclusion, makes it possible recognize inputs discharge delineate its area, which can be proposed implement strategies protect resource.

Язык: Английский

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Water Dynamics and Evaporation Losses to Inflows in Transboundary Mediterranean Lakes

Опубликована: Янв. 1, 2024

Язык: Английский

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Hydrological interactions between surface water and groundwater in ancient manmade village tank cascade systems (VTCSs) in the dry zone of Sri Lanka

The Science of The Total Environment, Год журнала: 2024, Номер 954, С. 176526 - 176526

Опубликована: Сен. 24, 2024

Язык: Английский

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