A5062634056- Soil and Water Nutrient Dynamics
- Hydrology and Watershed Management Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Groundwater and Isotope Geochemistry
- Constructed Wetlands for Wastewater Treatment
- Peatlands and Wetlands Ecology
- Phosphorus and nutrient management
- Fish Ecology and Management Studies
- Soil Carbon and Nitrogen Dynamics
- Coastal wetland ecosystem dynamics
- Soil erosion and sediment transport
- Water resources management and optimization
- Wastewater Treatment and Nitrogen Removal
- Crop Yield and Soil Fertility
- Urban Stormwater Management Solutions
- Marine and coastal ecosystems
- Microplastics and Plastic Pollution
- Aquatic Invertebrate Ecology and Behavior
- Freshwater macroinvertebrate diversity and ecology
- Bayesian Modeling and Causal Inference
- Groundwater flow and contamination studies
- Atmospheric and Environmental Gas Dynamics
- Water Treatment and Disinfection
- Agricultural Science and Fertilization
- Botany and Plant Ecology Studies
Lancaster University
2016-2025
Lancaster City Council
2019
University of Sheffield
2004-2011
Agriculture and Agri-Food Canada
2001
Phosphorus losses from land to water will be impacted by climate change and management for food production, with detrimental impacts on aquatic ecosystems. Here we use a unique combination of methods evaluate the impact projected future phosphorus transfers, assess what scale agricultural would needed mitigate these transfers. We combine novel high-frequency flux data three representative catchments across UK, new high-spatial resolution model, uncertainty estimates an ensemble simulations,...
Intensification of agriculture has resulted in increased soil degradation and erosion, with associated pollution surface waters. Small field wetlands, constructed along runoff pathways, offer one option for slowing down storing order to allow more time sedimentation nutrients be taken up by plants or micro-organisms. This paper describes research provide quantitative evidence the effectiveness small wetlands UK landscape. Ten were built on four farms Cumbria Leicestershire, UK. Annual...
Increased fluxes of reactive nitrogen (Nr), often associated with N fertilizer use in agriculture, have resulted negative environmental consequences, including eutrophication, which cost billions dollars per year globally. To address this, best management practices (BMPs) to reduce Nr loading the environment been introduced many locations. However, improvements water quality BMP implementation not always realised over expected timescales. There is a now significant body scientific evidence...
Abstract In northern peatlands, near‐saturated surface conditions promote valuable ecosystem services such as carbon storage and drinking water provision. Peat saturated hydraulic conductivity ( K sat ) plays an important role in maintaining wet by moderating drainage evapotranspiration. can exhibit intense spatial variability three dimensions change rapidly response to disturbance. The development of skillful predictive equations for peat other properties, akin mineral soil pedotransfer...
Abstract Although widely used in wetland hydrological studies, hydraulic conductivity ( K ) estimates from piezometer slug tests are often of questionable validity. Frequently, this is because insufficient attention paid to the details test procedure. Further, a potentially heterogeneous and anisotropic medium such as peat, use prone error. In paper we address some methodological issues surrounding peat. We compare data with laboratory determinations vertical horizontal obtained using new...
Abstract Sediments can be both a source and sink of dissolved phosphorus (P) in surface water shallow groundwater. Using laboratory mesocosms, we studied the influence flooding with deionized simulated river on P release to solution using sediment columns taken from riparian wetland. The mesocosm incubation results showed that rather than retaining nutrients, sediments zone may significant P. Concentrations porewater reached more 3 mg L −1 over 0.8 within month inundation. reductive...
Quantifying inorganic carbon fluxes to and from freshwater environments is essential for the accurate determination of total amount exported both atmosphere oceans. However, understanding how anthropogenic withdrawals perturb land-freshwater-ocean freshwater-atmosphere limited. Using United States (US) as an exemplar, we estimate that fresh surface water across country during year 2015 resulted in a median gross dissolved (DIC) retention flux 8.2 (uncertainty range: 6.7–9.9) Tg C yr–1,...
Atmospheric nitrate deposition and biogeochemical nitrogen cycling in headwaters have the potential to impact downstream ecosystem productivity, water chemistry drinking quality. However, not much is known about fate of headwater lakes during transport through catchments. We used a multidisciplinary synoptic approach, including stable isotope analysis nutrient limitation experiments, investigate transformations across hydrologically connected stream-lake networks. Of particular interest were...
Abstract Fluorescence microscopy is increasingly seen as a fast, user-friendly, and high-throughput method for detecting microplastics (MPs) in soil; however, its effectiveness across diverse MP types soil properties remains underexplored. This study tested fluorescence microscopy–Nile red (NR) staining approach on eight types, covering both biodegradable non-biodegradable plastics, three size ranges (≤ 150 µm, 100–250 500–1000 µm) loamy, clayey, sandy soils. Each sample, processed...
Groundwater ecosystems host diverse and largely unexplored communities of planktonic prokaryotes that play critical roles in global biogeochemical cycling maintaining drinking water quality. This study investigated the spatiotemporal dynamics prokaryotic a sandstone aquifer at depths 70-338m. By integrating spatial surveys across 48 pumping boreholes England with temporal analyses by seasonal repetition groundwater ‘piston flow age’ analysis, we how variations age, depth,...
Abstract Raised bogs are important ecohydrological systems in which there strong two‐way links between plant succession, litter and peat decay, hydrological functioning. Using recently established protocols, we measured the hydraulic structure of a raised bog West Wales. We tested two hypotheses: (i) that conductivity ( K ) shows depth dependency such lower layers effectively impermeable, (ii) marginal dome is than central areas. From 107 piezometer measurements found was but were not poorly...
Phosphate dosing of drinking water supplies, coupled with leakage from distribution networks, represents a significant input phosphorus to the environment. The oxygen isotope composition phosphate (δ(18)OPO4), novel stable tracer for phosphorus, offers new opportunities understand importance derived sources such as water. We report first assessment δ(18)OPO4 within supplies. A total 40 samples phosphate-dosed networks were analyzed across England and Wales. In addition, source...
Abstract Despite their common global occurrence, little work has been done on characterizing the hydraulic properties of root mats, particularly conductivity K . A method for estimating in field is piezometer slug test. In some mat systems, test may be only technique, or laboratory, that able to provide reliable estimates We installed 17 piezometers a Cladium mariscus L. (Pohl) and Phragmites australis Cav. (Streud.) UK fen. Tests were initiated by both insertion withdrawal. Repeat tests...
Improving stream water quality in agricultural landscapes is an ecological priority and a legislative duty for many governments. Ecosystem health can be effectively characterised by organisms sensitive to changes such as diatoms, single-celled algae that are ubiquitous component of benthos. Diatoms respond within daily timescales variables including light, temperature, nutrient availability flow conditions result from weather land use characteristics. However, little consideration has been...
Abstract Applying digestate, the residue from anaerobic digestion, to soil as a replacement for inorganic fertiliser is of growing interest in agriculture. However, impacts different fractions digestate on carbon (C) cycle remain unclear and provide focus research reported here. We examined effects applying whole (WD) solid (SD) dioxide (CO 2 C) efflux, concentrations dissolved organic (DOC), microbial biomass C (C micro ) phospholipid fatty acids, alongside use efficiency (CUE). A 21‐day...
The European Union Water Framework Directive (WFD) represents a new approach to the management of water across Europe. As part implementation WFD, integrated, catchment-scale plans for protection and restoration aquatic ecosystems must be developed. These need supported by science, focused on understanding general modes behaviour complex ecosystems, fundamental principles that govern this behaviour. This requires collaborative production scientific knowledge, drawing expertise from multiple...