As global demand for pharmaceuticals continues to grow, pharmaceutical pollution is becoming increasingly pervasive. Research on the occurrence and distribution of pharmaceuticals in marine ecosystems remains limited, however, with coastal sewage outfalls considered to be a major source of pharmaceu

Understanding the role of marine vegetation in shaping coastal carbon dynamics and supporting productivity is essential for robust ecological and socio-economic assessments and effective policy development. Our study employed stable isotope analysis (δ 13 C and δ 15 N) to investigate the importance

Consumption of food containing residues of nitrofuran metabolites may pose potential risks to human health. Although many countries have prohibited the use of nitrofurans as veterinary drugs, their il...

Abstract. Agriculture is the largest anthropogenic source of nitrous oxide (N2O), primarily due to nitrogen (N) fertilization. Understanding how the influence of key drivers and the relative contribut...

This study examines the relationships between the δ13C and δ18O signatures of extant charophyte carbonates (δ13CCARB and δ18OCARB) and those of dissolved inorganic carbon and ambient water (δ13CDI...

Early-to-Middle Miocene [23 to 13.8 million years ago (Ma)] climates were ∼6° to 9°C warmer than today. Around 16.9 Ma, benthic foraminiferal oxygen isotope (δ18O) records suggest pronounced warming, ...

The mineralization of soil organic carbon (SOC) is typically enhanced following the incorporation of straw into the soil, and liming for acidic soil is recognized as effective practice to improve soil...

Chemical heterogeneities in Earth’s deep mantle may record either preserved primordial reservoirs or later core-mantle exchange, but distinguishing between these origins remains challenging. Hydrogen isotopes offer a sensitive tracer, yet whether magma ...

Microbial carbon use efficiency (CUE) is a central parameter for understanding soil carbon cycling and is widely used to predict soil organic carbon (SOC) stabilization and accumulation, microbial met...

Nitrogen regulates primary productivity across much of the biosphere, yet fixed nitrogen loss remains poorly constrained because existing methods rely on indirect proxies or ex situ experiments. In th...

Productivity increases lake methane oxidation (MOX) due to methanotrophs attachment to phytoplankton. Oxic methane production represents a small fraction of MOX, so its increase with eutrophication wi...

Abstract. The oxygen isotopic composition of nitrate (NO₃⁻) produced by nitrification (δ¹⁸ONO3,nit) establishes the initial isotopic signature of NO₃⁻ in environmental systems and provides a baseline ...

Heterotrophic microorganisms are abundant across ecosystems and play a central role in environmental carbon cycling by storing, transforming, and decomposing organic matter. However, heterotrophs can ...

Dissimilatory nitrate reduction to ammonium (DNRA) is increasingly recognized as an alternative nitrate reduction pathway, yet its quantitative importance and regulatory mechanisms in engineered wastewater treatment systems remain poorly resolved. Here, DNRA and denitrification were systematically q

Despite reductions in external inputs, internal phosphorus (P) release from sediments remains a key barrier to lake recovery. Conventional mineral-centered frameworks inadequately account for the fundamental role of reactive organic matter in driving redox-mediated shifts in sediment P stability. We

Phytoplanktonic organically bound Tritium (OBT) in seawater is a potentially overlooked risk factor for the oceanic release of tritium from nuclear facilities, which attracted attention along the Fukushima coast due to the release of tritiated water (HTO) from the Fukushima Daiichi Nuclear Power Sta

Abstract. Resource use links ecological context to organismal performance, yet whether dietary breadth or trophic position is more closely associated with

Understanding proton-coupled charge transport in extracellular biopolymers is essential, as proton transport underlies extracellular electron transfer (EET), microbial electromethanogenesis, and the development of sustainable bioelectronic materials. Inspired by the structural and functional similar

Abstract. Acquiring new cellular states entails metabolic reprogramming driven by changes in the expression of cytosolic and mitochondrial metabolic enzyme

Only 10% of organic carbon from thawing Pleistocene permafrost in the Arctic that is buried in marine sediments ends up re-entering the active carbon cycle, according to a carbon isotope analysis of s...

Biogenic mangrove wetlands rely on trapping and burying organic production in soil to pace sea-level rise. However, the fate and role of allochthonous marine wrack in regulating carbon processing and ...

This study investigates the temporal and spatial trends of allochthonous organic matter (AOM) contributions to coastal sediments from the boreal Glomma River to the outer Oslofjord, southeastern Norwa...

Background and Aims Soil evaporation regulates plant water use, land–atmosphere exchange, and groundwater recharge, making its quantification critical in arid and semi-arid regions. We investigated so...

Aims Ecological plasticity enables plants to adapt to changing environmental conditions. Understanding water-use plasticity under extreme wet conditions is essential for predicting vegetation resilien...

Background Leaf litter-derived organic matter (OM) serves as a major source for carbon burial and a key driver for reactive nitrogen (Nr) biogeochemical cycles in coastal wetlands. However, its impacts on sediment Nr removal and associated nitrous oxide (N 2 O) production remain unexplored, particul

Background and Aims Understanding phosphorus (P) cycling across the soil profile is critical yet underexplored in evaluating agroforestry as a sustainable system. Methods This study investigated the i...

Cannabis legalization has created regulated markets requiring residual pesticide testing to protect public health. Regulatory programs establish action limits governing product release and enforcement...

Background and aims Soil indigenous properties critically regulate nitrogen (N) fate and crop productivity. However, how inherent N supply and buffering capacity interactively shape rice N-use strateg...

Abstract Background & aims Forest productivity and resilience are influenced by soil conditions; however, the mechanisms linking soil properties, isotopic signatures, and tree growth remain incompletely understood. This study evaluated whether soil carbon (δ 13 C) and nitrogen (δ 15 N) stable isotop

Marine-derived organic matter forms the foundation of the food web on sandy beaches where primary production is limited. Omnivorous ghost crabs (Ocypode spp.) inhabit sandy beaches and represent highl...

Serpentinization in the Mariana forearc controls redox conditions, volatile production, and the energy landscape for subsurface ecosystems, yet the temperatures remain poorly defined. We present in-situ oxygen isotope (δ 18 O, VSMOW) measurements of serpentine from three serpentinite mud volcanoes a

Isotopic mixing models are powerful tools in ecology for estimating diets. Since their initial formulation, these models have evolved into two distinct branches: Bayesian mixing models and dynamic...

This study evaluates groundwater quality and contamination risk in flood-prone areas of the Ikopa watershed in Antananarivo, Madagascar, where rapid urbanization, inadequate sanitation, and recurrent flooding threaten shallow hand-dug wells used for drinking water. The objectives were to characteriz

Unraveling the complex formation and alteration history for extraterrestrial organic matter is key to understanding the chemical evolution of the solar system (SS) and potentially even life's emergence on Earth. In this study, we performed high-precision triple oxygen isotope measurements on insolub

This study investigates the geochemical characteristics of brines within the Upper Jurassic Smackover Formation in Alabama and Arkansas through elemental and isotopic analyses and geochemical modeling to reveal the extent and nature of fluid mixing and water-rock interactions. Smackover Formation br

This study establishes essential baseline data on the current status, colony dynamics, and key threats facing the Laysan Albatrosses on Clarion Island and offers critical insights to guide future con...

Abstract. Nitrous oxide (N2O) is a potent greenhouse gas, and emissions from wastewater treatment plants (WWTPs) represent a significant and highly variable source. Understanding the dynamics in micro...

A multi-proxy approach integrating radial growth, leaf morphology, stable isotopes, elemental composition and soil properties revealed interacting mechanisms underlying drought-induced dieback in Med...

The oxygen isotope (δ18Oice) record from a ∼310-meter core drilled on the Guliya ice cap (GIC) in 2015 (GP2015) demonstrates reproducibility with a ∼309-meter core drilled nearby in 1992. Construction...

Rationale Volatile methylcyclosiloxanes, particularly octamethylcyclotetrasiloxane (D4), decamethylcyclopentasiloxane (D5), and dodecamethylcyclohexasiloxane (D6), are commonly found in the environm...

Stable carbon and oxygen isotopic signatures in soil carbonate nodules for paleoclimate reconstruction in southwestern Taiwan - Volume 68 Issue 5

Effects of different storage conditions on the carbon isotopic compositions of dissolved inorganic carbon - Volume 68 Issue 5

There is growing interest in the co-culture of macroalgae and filter-feeding bivalves due to anticipated trophic benefits that may enhance the productivity of both organisms. Detritus from cultured m...

Abstract. We have investigated the impact of riming on the deuterium excess (d-excess = δ2H − 8 ⋅ δ18O) of precipitation. In mixed-phase clouds, precipitation forms by vapor deposition, where supercoo...

Abstract. Residual nitrate remains a stoichiometric bottleneck limiting advanced nitrogen removal in anaerobic ammonium oxidation (anammox) processes. The

Combining long climate-isotope simulations with deep-sea oxygen isotope records, the Miocene Climatic Optimum (15 Ma) is estimated to have been 7.5∘C warmer than preindustrial -- 30% above e...

An age-depth model for core R14 was constructed using radiocarbon dating of total hydrolyzable amino acids Sea-level rise enhanced terrestrial organic matter delivery during transgressions Chemi...

N2 fixation and denitrification were concomitantly higher during the last glacial maximum in the Arabian Sea N2 fixation and denitrification were more intense in the northern Arabian Sea than in ...