Doctoral Training Partnerships: a range of postgraduate training is funded by the Research Councils. For information on current funding routes, see the common terminology at https://www.ukri.org/apply-for-funding/how-we-fund-studentships/. Training grants may be to one organisation or to a consortia of research organisations. This portal will show the lead organisation only.

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.

ALTER aims to demonstrate that there are real and lasting benefits for wide scale poverty alleviation, particularly for the rural poor, by tackling soil degradation at a range of spatial scales, from field to landscape, and using opportunities within agricultural as well as severely degraded land. Throughout the world, soil degradation impacts on the health, wealth and well-being of rural people in many different ways. Soils have a key supporting role in maintaining agricultural yields, water availability, water quality, resources for grazing animals and other ecosystem services. Some are perhaps less obvious but still valued such as maintaining habitats to support honey-bees and local wildlife. In Africa, soil degradation is recognised as a major constraint to alleviating poverty in rural communities. We have chosen to work in Ethiopia and Uganda where there are contrasting issues of soil degradation in mineral and organic soils are a result of agricultural land use but similar reliance in rural communities' on a range of benefits from soils. Solutions to soil degradation are not simple and require a much better understanding of how people benefit from soils, what they stand to gain if they can improve the condition of the soils that they manage whether for crops, livestock, timber production or as semi-natural areas, what they would need to do to accomplish this and what barriers may prevent this. In parallel we need to gain better insight into the likely success of different management options to improve soils. Ultimately these options will require some form of investment whether that be via money, time, resources or other mechanisms. We will investigate the relative pros and cons of these mechanisms from the perspective of local people, organisations involved with markets for Payments for Ecosystem Services and national objectives in alleviating poverty. A broader view of carbon benefits and trading is an opportunity to invest in lasting improvements in degraded ecosystems and the livelihoods of the poor that depend on these. All of this research and evidence building needs to be placed into the context of climate change. We need to establish that whatever might be suitable, acceptable and viable for tackling soil degradation now will have long-term benefits to local people and that these benefits will not be negated by the on-going changes to local climate. The ALTER project is an international consortium between The James Hutton Institute (UK), University of Aberdeen (UK), Hawassa University (Ethiopia), The Ethiopian Government's Southern Agricultural Research Institute (SARI, Ethiopia), Carbon Foundation for East Africa (CAFEA, Uganda) and the International Water Management Institute (Nile Basin & Eastern Africa Office, Ethiopia). This team brings together natural scientists, social scientists and economists to work together with rural communities and other local decision-makers and facilitators to improve our capacity to predict how human-environment linked systems respond to incentives and other drivers change. This predictive capacity is needed to be able to explore whether different options for change could result in substantive poverty alleviation.

During recent decades and centuries, pools and fluxes of C, N and P in UK ecosystems have been transformed by the spread and fertiliser-based intensification of agriculture, by atmospheric pollution, and now by fossil-fuel induced climate change. We need to understand the processes that determine these effects, in order to improve the sustainability of agriculture, preserve carbon stocks, control the eutrophication of terrestrial and freshwater ecosystems, and reduce nutrient delivery to the sea and greenhouse gas emissions. Contemporary pools of C, N and P in soils and sediments reflect processes occurring on a range of timescales (up to 1000 years or more for organic matter turnover in soils) and also over a range of spatial scales. We propose research to address long-term, large scale processing of C, N and P in the environment. The principal objective is to account for observable terrestrial and aquatic pools, concentrations and fluxes of C, N and P on the basis of past inputs, biotic and abiotic interactions, and transport processes, in order to address the following scientific questions; 1. Over the last 200 years, what have been the temporal responses of soil C, N and P pools in different UK catchments to nutrient enrichment? 2. What have been the consequent effects on C, N and P transfers from land to the atmosphere, freshwaters and estuaries? 3. How have terrestrial and freshwater biodiversity responded to increases in ecosystem productivity engendered by nutrient enrichment at different locations? We aim at an integrated quantitative description of the interlinked land and water pools and annual fluxes of C, N and P for the UK over time. Central to the project is the application, development and parameterisation of mechanistically-based models applicable over long timescales and at a broad spatial scale. The models will be designed to exploit the large number of existing biogeochemical data for the UK, with new targeted measurements to fill important gaps. A key ingredient is radiocarbon data for natural organic matter in soils and waters, which provide a unique means of estimating longer-term turnover rates of organic matter. The project is organised into seven workpackages, as follows. WP1 Data. This involves the collation and management of monitoring and survey data and literature searches. Data will be required for driving and parameterising models. WP2 New measurements. Gap-filling information will be obtained about C & N releases from fuels, soil concentrations of C, N, P, and radiocarbon, vegetation contents of C, N and P, a major effort on soil denitrification, riverine organic matter including radiocarbon contents. WP3 Atmospheric model. This will use a variety of data, and atmospheric physics, to describe N deposition at 5 km2 resolution for the UK from 1800 to the present, and take into account emissions from industry and agriculture. WP4 Terrestrial models. Models will be developed and parameterised to describe (a) biogeochemical cycling of C, N and P in natural and agricultural soils, simulating losses by gaseous evasion and solute leaching, and (b) physical erosion. WP5 Aquatic models. These will describe sediment transport of organic matter (including C, N and P), lake processing, denitrification, and groundwater transport. Point source inputs will be quantified. WP6 Integrated Model. The IM will bring together the models from WP3-5 within a grid-based hydrological system, applicable to the whole of the UK. Through the IM we will answer Questions 1 and 2, producing temporal and spatial terrestrial and aquatic outputs for representative catchments. The IM will include estimates of uncertainty and be applicable for future scenario analysis. WP7 Biodiversity. Model output from WP3-6 will be used to analyse terrestrial plant diversity and diatom diversity in lake sediments, thereby addressing Question 3.

Abstracts are not currently available in GtR for all funded research. This is normally because the abstract was not required at the time of proposal submission, but may be because it included sensitive information such as personal details.